Diversity Patterns Research Articles

Tempo and mode of diversification of the red devil spiders (Araneae: Dysderidae) of the Canary Islands

AbstractThe study of adaptive radiations has shed light on our current understanding of evolution. However, previous studies examining the mode in which species diversified, how diversification rates varied, and how ecological specialisation affected these processes have found few different results across different taxa and geographic and ecological systems, showing how complex this process is. To gain a more complete picture of how species evolve, additional model systems that encompass alternative ecological requirements are needed. Here, we present the results of a study aimed at unravelling the diversification mode and evolutionary drivers of the spider genus Dysdera, the red devil spiders, endemic to the Canary Islands. These species exhibit remarkable phenotypic variability in their mouthparts, which has been related to different levels of specialisation in the predation of isopods. We explored patterns of lineage diversification and assessed the role of trophic specialisation as a driver of species diversification. Additionally, we used climatic variables, occurrence data and morphological information to unravel the underlying mode of speciation by means of joint species distribution models and age‐range correlation methods. Our results reveal that red devil spiders underwent an early burst of diversification, followed by a slowdown of diversification rates, which is a hallmark of adaptive radiation. We also found evidence that the trophic morphology shaped diversification, with specialist species exhibiting higher rates of diversification. Finally, our analyses suggest that speciation occurred mostly in allopatry, with subsequent secondary sympatry following range expansion.

Unified Assembly of Chloroplast Genomes: A Comparative Study of Grapes Representing Global Geographic Diversity

The genus Vitis, known for its economically important fruit—grape—is divided into three geographical groups, American, East Asian, and Eurasian, along with a hybrid group. However, previous studies on grape phylogeny using chloroplast genomes have been hindered by limited sample sizes and inconsistent methodologies, resulting in inaccuracies. In this study, we employed the GetOrganelle software with consistent parameters to assemble the chloroplast genomes of 21 grape cultivars, ensuring comprehensive representation across four distinct groups. A comparative analysis of the 21 grape cultivars revealed structural variation, showing chloroplast genome sizes ranging from 160,813 bp to 161,275 bp. In 21 Vitis cultivars, genome annotation revealed 134 to 136 genes, comprising 89 to 91 protein-coding genes (PCGs), 37 tRNAs, and 8 rRNAs. Our observations have pinpointed specific occurrences of contraction and expansion phenomena at the interfaces between inverted repeat (IR) regions and single-copy (SC) regions, particularly in the vicinity of the rpl2, ycf1, ndhF, and trnN genes. Meanwhile, a total of 193 to 198 SSRs were identified in chloroplast genomes. The diversification pattern of chloroplast genomes exhibited strong concordance with the phylogenetic relationships of the Euvitis subgenera. Phylogenetic analysis based on conserved chloroplast genome strongly clustered the grape varieties according to their geographical origins. In conclusion, these findings enhance our understanding of chloroplast genome variation in Vitis populations and have important implications for cultivar selection, breeding, and conservation efforts.

Phylogeny and evolution of larval feeding mode in the megadiverse superfamily Sciaroidea (Diptera)

Abstract Sciaroidea is a megadiverse clade within Diptera that exhibits diverse larval feeding modes. In this study, we explored the phylogenetic relationships and evolution of larval feeding modes within the superfamily using a fossil-calibrated time tree. We found that filtering out potentially fast-evolving sites altered the family-level tree topology, and that species within Sciaroidea incertae sedis might be crucial in determining the general tree topology. The most recent common ancestor of Sciaroidea was inferred to have originated in the Upper Triassic (~225 Ma). A major radiation of families occurred from the Uppermost Triassic to the Lowermost Jurassic (190–200 Ma). The ancestral larval feeding mode was inferred to be mycophagy. Most families retained this feature with only minor transitions occurring in some clades; however, Cecidomyiidae and Keroplatidae went through notable shifts in larval feeding mode. Cecidomyiidae underwent a transition from mycophagy to phytophagy in the Lower Cretaceous, in line with angiosperm radiation as suggested in previous studies. The larvae of stem Keroplatidae were inferred to be predators since the Jurassic. A transition back to mycophagy occurred within the subfamily Keroplatinae during the Paleogene to Uppermost Cretaceous, coinciding with the origin and radiation of species-rich mycophagous clades of other sciaroid families. Our study highlights the importance of taxon sampling and sequence filtering in phylogenetic analyses of Sciaroidea. We suggest, based on temporal patterns of lineage diversification, that the evolution of larval feeding modes within the group might be correlated with the diversification of mushroom-forming fungi and angiosperms.

Origin and Diversification of Endemic Seed Plants in Central (Nepal) and Eastern (Bhutan) Himalaya

Mountains are rich in endemic species diversity due to various factors, including steep elevational and climatic gradients and high habitat heterogeneity. While the causal factors behind high species endemism have been well worked out with respect to habitat characteristics and climate, the evolutionary mechanisms have received little attention. In this study, we attempt to decipher the evolutionary patterns of diversification of endemic plants in Nepal (Central Himalaya) and Bhutan (Eastern Himalaya) using species-presence records, phylogenetic supertrees and ancestral area reconstruction methods. We found that the Nepal Himalaya was richer than Bhutan Himalaya with respect to endemic plant species. Maximum diversification of endemic plants in the Nepal Himalaya occurred 35-20 million years ago (Mya), and in Bhutan Himalaya, it occurred during 55-45 Mya. Ancestral area reconstructions revealed that the maximum number of endemics in both Nepal and Bhutan Himalaya have diversified from taxa that migrated from Southeast Asiatic Malaysian and Southeast Chinese regions. We conclude that the plant species endemism in the Himalaya is closely linked with the phase-wise gradual uplift of mountains, long-term climate variation, species migration and floristic composition of the neighbouring landscapes.

Genomic and transcriptomic perspectives on the origin and evolution of NUMTs in Orthoptera

Nuclear mitochondrial pseudogenes (NUMTs) result from the transfer of mitochondrial DNA (mtDNA) to the nuclear genome. NUMTs, as “frozen” snapshots of mitochondria, can provide insights into diversification patterns. In this study, we analyzed the origins and insertion frequency of NUMTs using genome assembly data from ten species in Orthoptera. We found divergences between NUMTs and contemporary mtDNA in Orthoptera ranging from 0 % to 23.78 %. The results showed that the number of NUMT insertions was significantly positively correlated with the content of transposable elements in the genome. We found that 39.09 %-68.65 % of the NUMTs flanking regions (2,000 bp) contained retrotransposons, and more NUMTs originated from mitochondrial rDNA regions. Based on the analysis of the mitochondrial transcriptome, we found a potential mechanism of NUMT integration: mitochondrial transcripts are reverse transcribed into double-stranded DNA and then integrated into the genome. The probability of this mechanism occurring accounts for 0.30 %-1.02 % of total mitochondrial nuclear transfer events. Finally, based on the phylogenetic tree constructed using NUMTs and contemporary mtDNA, we provide insights into ancient evolutionary events such as species-specific “autaponumts” and “synaponumts” shared among different species, as well as post-integration duplication events.

Microbial diversification is maintained in an experimentally evolved synthetic community.

In nature, bacteria live in microbial communities and interact with other species, for example, through the exchange of resources leaked into the external environment (i.e., cross-feeding interactions). The role that these cross-feeding interactions play in shaping patterns of diversification remains understudied. Using a simple bacterial system in which one species cross-feeds resources to a second species (commensal species), we showed that the commensal species diversified into two subpopulations that persisted only when the cross-feeder partner was present. We further observed loss-of-function mutations in flagellar genes that were fixed in monocultures but not in co-cultures. Our findings suggest that cross-feeding species influence patterns of diversification of other species. Given that nutrient leakage is pervasive in microbial communities, the findings from this study have the potential to extend beyond our specific bacterial system. Importantly, our study has contributed to answering the larger question of whether species evolved differently in isolation versus when interacting with other species.

Revisiting evolutionary relationships of Antrodiaetus (Araneae, Mygalomorphae, Antrodiaetidae) using phylogenomics; implications for species diversity and biogeography of a persistent Holarctic lineage

Antrodiaetus is a lineage of mygalomorph spider (Mygalomorphae: Antrodiaetidae) that has persisted since the late Cretaceous and has a disjunct Holarctic distribution and strong morphological conservatism. These folding-door spiders possess a life history (i.e., limited dispersal, conserved environmental niche) that closely ties their evolution to geology. This study produces a robust, well-supported phylogenomic inference of all currently recognized Antrodiaetus species using UCEs (Ultraconserved Elements), corroborates previous biogeographical hypotheses, and proposes new hypotheses about diversification patterns. We also confirm that previously suspected cryptic diversity within A. pacificus is underestimated, as this nominal species comprises multiple divergent and cryptic lineages. Our phylogeny now serves as a foundation for understanding Antrodiaetus species relationships, biogeography, and speciation.

Reconciling Santa Rosalia: Both Reproductive Isolation and Coexistence Constrain Diversification.

AbstractUnderstanding patterns of diversification necessarily requires accounting for both the generation and the persistence of species. Formal models of speciation genetics, however, focus on the generation of new species without explicitly considering the maintenance of biodiversity (e.g., coexistence, the focus of ecological studies of diversity). Consequently, it remains unclear whether and how new species will coexist following a speciation event, a gap limiting our ability to understand the rate-limiting controls of diversification over macroevolutionary timescales. To connect coexistence and speciation theory and assess the relative importance of ecological versus genetic constraints in diversification events, we develop a deterministic, three-locus, population-genetic model that includes a skewed distribution of available resources (to generate variation in fitness differences), frequency-dependent competition, and assortative mating. Both ecology and genetics play vital and interacting roles in shaping initial speciation events and long-term eco-evolutionary outcomes. Ecological constraints are especially important when fitness differences are large and competition remains strong among dissimilar phenotypes. Ephemeral species can occur in our model and are typically lost because of competitive exclusion, a result demonstrating that species persistence may serve as the rate-limiting control of long-term diversification rates. More broadly, our model adds evidence that the unification of ecological and evolutionary (including genetic) perspectives on biodiversity is needed to predict large-scale patterns.

Tradeoffs and synergies between social equity and environmental benefits in conservation

Conservation programs worldwide pursue social equity alongside environmental benefits and economic efficiency. When the spatial patterning of human diversity differs from the patterning of biological diversity, conservation planners face complex tradeoffs between social and biological objectives. Here, we quantify how these tradeoffs depend on the correlation between the spatial distributions of social and biological diversity. We used empirical patterns in the commonness and rarity of species to generate simulated landscapes with pre-defined correlations between biological diversity and human social diversity. Our analysis shows how tradeoffs between social equity and environmental benefits are unavoidable when human and biological diversity are negatively correlated. However, when human and biological diversity are strongly positively correlated, then biological and social priorities are congruent. In these settings, well-designed conservation programs may engender positive feedbacks between social equity and ecosystem services, enhancing both. Our analysis focused on distributional equity, but similar dynamics are likely to occur with procedural, recognitional and contextual equity. Given growing evidence that socially equitable conservation programs are more likely to be successful, our findings underscore the importance of carefully assessing the potential for conflicts and synergies between the social and biological goals of conservation programs.

The multifaceted diversification of the sagitta otolith across the fish tree of life

Abstract Otoliths of actinopterygians are calcified structures playing a key role in hearing and equilibrium functions. To understand their morphological diversification, we quantified the shape of otoliths in both lateral and dorsal view from 697 and 323 species, respectively, using geometric morphometrics. We then combined form (i.e. size and shape) information with ecological data and phylogenetically informed comparative methods to test our hypotheses. Initially, the exploration of morphospaces revealed that the main variations are related to sulcus acusticus shape, elongation and lateral curvature. We also found strong integration between otolith and sulcus shape, suggesting that they are closely mirroring each other, reinforcing a shape-dependent mechanism crucial for otolith motion relative to its epithelium and validating the functional significance of otolith morphology in auditory and vestibular processes. After revealing that otolith shape and size retained a low phylogenetic signal, we showed that the disparity of otolith size and shape is decoupled from order age and from the level of functional diversity across clades. Finally, some traits in otolith disparity are correlated with their morphological evolutionary rate and the order speciation rate. Overall, we observed that the pattern of diversification of otoliths across the fish tree of life is highly complex and likely to be multifactorial.

Exploring the Financial Sustainability of Indian Public Sector Banks: A Study on Revenue Diversification Patterns

This article delves into the intricate relationship between revenue diversification and the financial performance and sustainability of both public and private sector banks in India. Through a comprehensive analysis of nine years’ panel data from 2015 to 2023 and applying descriptive statistics, the Herfindahl–Hirschman index, panel data regression models and generalized method of moments, our findings reveal a concerning trend—Revenue diversification is exerting a negative influence on the financial well-being of the Indian public sector banks (PSBs) and positively impacts the private sector banks. Contrary to conventional wisdom, the pursuit of diversifying revenue streams has not yielded the anticipated benefits for Indian PSBs. Instead, it has emerged as a source of financial instability and vulnerability. Hence, our findings suggest that a focused approach to revenue sources may be more advantageous for the PSBs. This study underscores the importance of strategic revenue planning and resource allocation for Indian PSBs to enhance their financial performance and self-sufficiency. The results have practical implications for policymakers, bank executives and stakeholders in the Indian banking sector, offering guidance on optimizing revenue strategies to ensure the long-term sustainability of PSBs in India.

Daily Diversity Flows: Racial and Ethnic Context Between Home and Work.

The racial and ethnic diversification of the U.S. population has transformed the demographic makeup of communities and rapidly increased exposure to diversity in American neighborhoods. Although diversity exposure occurs throughout people's daily lives, the conventional approach to describing diversity only at places of residence potentially understates the full extent of this phenomenon. In this study, we explore short-term, within-day changes in the diversity of different neighborhoods by considering U.S. workers' work and residential locations. Using estimates for daytime and nighttime populations among metropolitan census tracts, our empirical analyses investigate the extent to which the process of daytime mobility for work relates to changes in the racial and ethnic diversity of different spaces. Our results indicate widespread daily shifts toward diversity for most neighborhood types, especially those with residential (nighttime) populations that are predominantly Black, Latino, or Asian. We find that patterns of intraday diversification experienced minor declines across recent decades but are present in most metropolitan areas. Our findings also show that intraday changes in racial and ethnic diversity overlap with nonracial forms of daily diversity change. Further, average within-day changes in diversity are more pronounced in areas with greater residential segregation.

Deciphering the evolution and biogeography of ant-ferns Lecanopteris s.s

Southeast Asia is a biodiversity hotspot characterized by a complex paleogeography, and its Polypodiopsida flora is particularly diverse. While hybridization is recognized as common in ferns, further research is needed to investigate the relationship between hybridization events and fern diversity. Lecanopteris s.s., an ant-associated fern, has been subject to debate regarding species delimitations primarily due to limited DNA markers and species sampling. Our study integrates 22 newly generated plastomes, 22 transcriptomes, and flow cytometry of all native species along with two cultivated hybrids. Our objective is to elucidate the reticulate evolutionary history within Lecanopteris s.s. through the integration of phylobiogeographic reconstruction, gene flow inference, and genome size estimation. Key findings of our study include: (1) An enlarged plastome size (178–187 Kb) in Lecanopteris s.s., attributed to extreme expansion of the Inverted Repeat (IR) regions; (2) The traditional ‘pumila’ and ‘crustacea’ groups are paraphyletic; (3) Significant cytonuclear discordance attributed to gene flow; (4) Natural hybridization and introgression in the ‘pumila’ and ‘darnaedii’ groups; (5) L. luzonensis is the maternal parent of L. ‘Yellow Tip’, with L. pumila suggested as a possible paternal parent; (6) L. ‘Tatsuta’ is a hybrid between L. luzonensis and L. crustacea; (7) Lecanopteris s.s. first diverged during the Neogene and then during the middle Miocene climatic optimum in the Indochina and Sundaic regions. In conclusion, the biogeographic history and speciation of Lecanopteris have been profoundly shaped by past climate changes and geodynamics of Southeast Asia. Dispersals, hybridization and introgression between species act as pivotal factors in the evolutionary trajectory of Lecanopteris s.s.. This research provides a robust framework for further exploration and understanding of the complex dynamics driving the diversification and distribution patterns within Polypodiaceae subfamily Microsoroideae.

Evolutionary innovation accelerates morphological diversification in pufferfishes and their relatives.

Evolutionary innovations have played an important role in shaping the diversity of life on Earth. However, how these innovations arise and their downstream effects on patterns of morphological diversification remain poorly understood. Here, we examine the impact of evolutionary innovation on trait diversification in tetraodontiform fishes (pufferfishes, boxfishes, ocean sunfishes, and allies). This order provides an ideal model system for studying morphological diversification owing to their range of habitats and divergent morphologies, including the fusion of the teeth into a beak in several families. Using three-dimensional geometric morphometric data for 176 extant and fossil species, we examine the effect of skull integration and novel habitat association on the evolution of innovation. Strong integration may be a requirement for rapid trait evolution and facilitating the evolution of innovative structures, like the tetraodontiform beak. Our results show that the beak arose in the presence of highly conserved patterns of integration across the skull, suggesting that integration did not limit the range of available phenotypes to tetraodontiforms. Furthermore, we find that beaks have allowed tetraodontiforms to diversify into novel ecological niches, irrespective of habitat. Our results suggest that general rules pertaining to evolutionary innovation may be more nuanced than previously thought.

Genetic diversity and diversification patterns of puma (Puma concolor) populations in the southern end of the species distribution

The puma (Puma concolor Linnaeus, 1771) is the top predator with the widest distribution in America. Since the establishment of European settlers on the American continent, puma populations have experienced significant contractions and reductions in their original distribution. In Argentina, the management of the conflict between humans and pumas (direct persecution and habitat modification) focused on reduction or elimination methods, leading to a drastic contraction, even total eradication, of puma populations as seen in Patagonia and the eastern part of the country. Despite the lack of knowledge about puma population demographic trends, there are taxonomic issues that remain controversial and need to be resolved to implement appropriate management and conservation measures. Therefore, the aim of this study was to genetically characterize puma populations in the central-southern region of Argentina using two mitochondrial markers, evaluate their demographic history, compare our results at a macro-regional level, and discuss our findings in a conservation and management context. A total of 203 individuals were used, and a fragment of the control region and another of ND5 were sequenced. The genetic variability obtained was moderate. Substitution rates for each locus and the tMRCA were calculated from calibrated trees. In a concatenated tree, two main phylogenetic clades were identified (posterior probability = 1), although a reciprocal monophyly was not observed, with a divergence time of 228 thousand years and a 95% CI [117–363 thousand years]. When evaluating population structuring, three genetic clusters were found, one characteristic of the Patagonian region and the others in the central part of the country. Calculating the ФST values for pairs resulted in significant structuring between Patagonia and the rest of the populations, suggesting the arid diagonal as a possible barrier to gene flow. When evaluating the demographic history, neutrality tests would support a recent expansion in Patagonia. These findings are crucial in defining two distinct Management Units (MUs) in the southern part of puma distribution and providing valuable information for management and conservation measures for the species.

KELANTING INNOVATION (GRAND MOTHER CLASS OF CARE STUNTING ) EDUCATION AND LOCAL FOOD DIVERSIFIED IN PREVENTING STUNTING SIDOBANDUNG, BALEN, BOJONEGORO REGENCY

Nutrition problems are still a concern for the Indonesian government to be resolved immediately, one of which is the problem of stunting. , Bojonegoro Regency's stunting prevalence rate is 23.9 percent, making Bojonegoro the district with the 13th highest stunting prevalence of 38 districts and cities in East Java. The prevalence of stunting which is still quite high can affect Indonesia's development performance because stunting has an impact on children's health status so that children become vulnerable to illness and has an impact on children's intelligence and quality of life, so handling it is still a government priority. The innovation of the KELANTING program (Stunting Caring Grandmother Class) is present by involving academics who act as references for solving problems based on research results (based on research) in the field of midwifery and nursing. So that it is able to increase the understanding of the community, especially grandmother caregivers, so that they are able to carry out care appropriately and get used to it. children to consume foods with balanced contents. The Klanting Program is carried out with Local Food Education and Diversification in Sidobandung Village, Balen District, Bojonegoro Regency" as a pilot project for community-based stunting prevention efforts. This activity is carried out by involving 25 grandmothers who care for toddlers by carrying out outreach and education. After the Klanting activity was carried out, there was an increase in the understanding and knowledge of grandmother caregivers regarding parenting styles and food diversification to prevent stunting, namely 72% of grandmother caregivers after the clanting activity had good knowledge, compared to previously only 28%. This shows that there is an increase in the percentage of understanding and knowledge of grandmothers who care for toddlers about parenting patterns of grandmothers and local food diversification in order to increase toddlers' interest in eating food diversity and the use of local food which can prevent stunting in toddlers.

Phylogeographic patterns match the floristic subdivisions: The diversification history of a widespread herb in subtropical China.

Subtropical China is dominated by evergreen broad-leaved forests (EBLFs) and is acknowledged as a critical region for its high floristic richness and endemism. Understanding of evolutionary mechanisms of such global biodiversity hotspots comes almost exclusively from long-lived tree species. Herbaceous plants represent critical biodiversity components in forests, however, the diversification history of understory herbs in subtropical EBLFs remain poorly understood. Here, we investigated the phylogeographic patterns and demographic history of Oreocharis auricula, a widespread perennial herb endemic to the EBLFs of subtropical China. Both cpDNA sequences and single-copy nuclear genes were used to investigate the genetic variation among 657 individuals from 68 populations. Evidences from molecular dating, demographic history construction, and species distribution modeling were also combined to infer the phylogeography and evolutionary history of O. auricula. Strong phylogeographic signals have been congruently observed using nuclear and plastid DNA markers, with the diversification patterns generally consistent with the recognized floristic subdivisions of subtropical China. Notably, we revealed an important phylogeographic barrier along the Nanling mountain range, which is also around a climatic transition at 24-26°N latitude in subtropical China, separating the south monsoon subtropical EBLFs from the mid-subtropical EBLFs. Demographic expansion and significant niche divergence were detected among the extant lineages, which may have diverged during the early Pleistocene. The inherent characteristics of understory herbs with limited dispersal and short generation time intensify the genetic divergence response of O. auricula to abiotic forces, contributing to the profound phylogeographic imprints of mountains and climate in such herbaceous flora. To further substantiate the generality of the identified patterns, it is paramount to extend phylogeographic investigations to other understory herbaceous taxa in subtropical China. These results have expanded our understanding of the diversification processes of subtropical forests in China.

Adaptive radiation of the Callicarpa genus in the Bonin Islands revealed through double-digest restriction site-associated DNA sequencing analysis.

The Bonin Islands, comprised of the Mukojima, Chichijima, and Hahajima Islands, are known for their isolated and distinctive habitats, hosting a diverse array of endemic flora and fauna. In these islands, adaptive radiation has played a remarkable role in speciation, particularly evident in the Callicarpa genus that is represented by three species: Callicarpa parvifolia and C. glabra exclusive to the Chichijima Islands, and Callicarpa subpubescens, distributed across the entire Bonin Islands. Notably, C. subpubescens exhibits multiple ecotypes, differing in leaf hair density, flowering time, and tree size. In this study, we aimed to investigate species and ecotype diversification patterns, estimate divergence times, and explore cryptic species within Callicarpa in the Bonin Islands using phenotypic and genetic data (double-digest restriction site-associated DNA sequencing). Genetic analysis revealed that C. parvifolia and C. glabra both formed single, distinct genetic groups. Conversely, C. subpubescens consisted of six genetic groups corresponding to different ecotypes and regions, and a hybrid group resulting from the hybridization between two of these genetic groups. Population demography analysis focusing on six Chichijima and Hahajima Islands-based species/ecotypes indicated that all species and ecotypes except one ecotype diverged simultaneously around 73-77 kya. The star-shaped neighbor-net tree also suggests the simultaneous divergence of species and ecotypes. The species and ecotypes that simultaneously diverged adapted to dry environments and understory forests, suggesting that aridification may have contributed to this process of adaptive radiation. Moreover, leaf morphology, flowering time, and genetic analyses suggested the presence of two cryptic species and one hybrid species within C. subpubescens.

Tangled webs and spider-flowers: Phylogenomics, biogeography, and seed morphology inform the evolutionary history of Cleomaceae.

Cleomaceae is an important model clade for studies of evolutionary processes including genome evolution, floral form diversification, and photosynthetic pathway evolution. Diversification and divergence patterns in Cleomaceae remain tangled as research has been restricted by its worldwide distribution, limited genetic sampling and species coverage, and a lack of definitive fossil calibration points. We used target sequence capture and the Angiosperms353 probe set to perform a phylogenetic study of Cleomaceae. We estimated divergence times and biogeographic analyses to explore the origin and diversification of the family. Seed morphology across extant taxa was documented with multifocal image-stacking techniques and morphological characters were extracted, analyzed, and compared to fossil records. We recovered a well-supported and resolved phylogenetic tree of Cleomaceae generic relationships that includes 236 (~86%) species. We identified 11 principal clades and confidently placed Cleomella as sister to the rest of the family. Our analyses suggested that Cleomaceae and Brassicaceae diverged ~56 mya, and Cleomaceae began to diversify ~53 mya in the Palearctic and Africa. Multiple transatlantic disjunct distributions were identified. Seeds were imaged from 218 (~80%) species in the family and compared to all known fossil species. Our results represent the most comprehensive phylogenetic study of Cleomaceae to date. We identified transatlantic disjunctions and proposed explanations for these patterns, most likely either long-distance dispersals or contractions in latitudinal distributions caused by climate change over geological timescales. We found that seed morphology varied considerably but mostly mirrored generic relationships.

Motif Penggunaan Aplikasi TikTok pada Siswa SMA N 2 Boyolali Ditinjau dari Teori Motif Alfred Schutz

The development of globalization has brought information technology to develop rapidly in aspects of life, especially the emergence of new media, namely TikTok. Many things underlie a person's behavior in using social media so that it provides a variety of patterns. This study aims to explain the motives for the TikTok application among SMA N 2 Boyolali students and what patterns are formed. This research uses a qualitative method with a phenomenological approach. Data collection techniques in this study used observation, interviews, and document review. The data analysis technique used is data reduction, data presentation, and conclusion drawing. The results showed that there are patterns of using the TikTok application in the form of diversion patterns used for entertainment, patterns of increased intensity use at night, to patterns created for informative purposes. The use of TikTok has many motives, it can even give rise to derivative motives due to its use. Broadly speaking, there are two main motives, namely the "because" motive which explains the reasons for using TikTok by students. This motive is an effort to adjust to trends, space for self-expression, and opportunities for economic activity. Meanwhile, the "for" motive is more future-oriented, such as investing in social capital, wanting to become content creators and influencers.