Mites Acari Research Articles

One new genus and two new species of eriophyoid mites (Acari: Eriophyoidea) from South China

One new genus and two new species of eriophyoid mites from South China are described and illustrated: Epicecidophyes cinnamomi sp. nov. infesting Cinnamomum camphora (L.) J. Presl (Lauraceae) belongs to the subfamily Cecidophyinae and Fairina dimocarpi gen. nov. & sp. nov. infesting Dimocarpus longan Lour. (Sapindaceae) belongs to the subfamily Phyllocoptinae. Both new species are vagrants causing no apparent damage to their host plants.

Description of three new species and a new record of eriophyid mites (Acari: Eriophyoidea) from Egypt

Four eriophyid mite species were collected on plants during field survey in Egypt. Abacarus sacchari ChannaBasavanna is recorded for the first time from Egypt and a supplementary morphological description and illustrations are given. A new species, Aculodes sacchari sp. nov., is vagrant in grooves on the inner surface of the leaves of Saccharum officinarum L. (Poaceae) and no apparent symptoms were observed. Two other new species are described: Aculus glinus sp. nov., causes deformations on stems and leaves of Glinus lotoides L. (Molluginaceae), and Aceria nodiflorae sp. nov., is vagrant on leaves and flowers of Phyla nodiflora (L.) Greene (Verbenaceae) and no apparent symptoms were observed. Both adult sexes and immature stages are described and illustrated for all species.

Ameroseiid mites (Acari: Mesostigmata) from Egypt, with a complementary description of six species, and a key to the species recorded from the country

A total of 12 mite species of the family Ameroseiidae have been reported from Egypt. The objectives of this paper are to report an additional species, Kleemannia pavida (Koch), from that country and to present complementary descriptions of seven of those species, namely Ameroseius aegypticus El-Badry, Nasr & Hafez, Kleemannia kosi El-Badry, Nasr & Hafez, K. nova Nasr & Abou-Awad, K. wahabi Ibrahim & Abdel-Samed, K. pavida, K. plumosa (Oudemans) and Sertitympanum zaheri (El-Badry, Nasr & Hafez), based on the examination of specimens from Egypt. Within this context, the males of K. nova, K. wahabi and S. zaheri are described for the first time. A key to all the ameroseiid species recorded from Egypt is provided.

Descriptions of four new species of phytoseiid mites (Acari: Mesostigmata) associated with medicinal plants from Northern Himalayan Zone of West Bengal, India

ABSTRACT Four new mite species of the family Phytoseiidae (Acari: Mesostigmata), namely, Typhlodromus (Anthoseius) hasnuhanae Karmakar & Molla sp. nov., Typhlodromus (Anthoseius) theae Karmakar & Molla sp. nov., Typhlodromus (Anthoseius) ramdhuraensis Karmakar & Molla sp. nov., and Phytoseius dumurae Karmakar & Molla sp. nov. are described based on specimens collected from Hasnuhana (Cestrum nocturnum L.: Solanaceae), Tea plant (Camellia sinensis L.: Theaceae), Ulatkambal plant (Abroma augustum (L.): Malvaceae), and Fig plant (Ficus carica L.: Moraceae) at the Northern Hill Zone of West Bengal located amidst the Central Himalayan Mountain range. http://www.zoobank.org/urn:lsid:zoobank.org:pub:AC4F778D-1620-4612-B19E-2B26A8B80375

Mites (Acari) in the Manchester Museum: Curators and a committee

The Manchester Museum has a series of collections of mites and ticks as a consequence of donations and the activities of members of the Museum at different times. Brief details of the collectors are given, and the extent of coverage of the groups concerned is described. Full records can be provided on application to the Entomology Department.

Spatial distribution and fluctuating populations of predatory mites (Mesostigmata: Phytoseiidae), phytophagous mites (Acari: Eriophyidae, Tetranychidae) and their relationships with wild chili pepper phenological stages in two Natural Protected Areas of Mexico

Ecological interactions between mites (predatory and phytophagous) and wild plants growing in undisturbed environments play a crucial role to understand their natural settlement, development and dispersion patterns. Pequin chili pepper, Capsicum annuum L. var. glabriusculum, is a low-cost natural resource for local communities living inside Natural Protected Areas (ANP) of Tamaulipas State in Mexico. The aims of this research work were: 1) determine the spatial distribution pattern of predatory and phytophagous mites, 2) determine the spatiotemporal association between predatory and phytophagous mites, and 3) determine the association among different mite species and some phenological stages of Pequin chili pepper. The most abundant phytophagous mites were Tetranychus merganser and Aculops lycpoersici, and the predatory species were Amblyseius similoides, Euseius mesembrinus and Metaseiulus (Metaseiulus) negundinis. Most mite species showed an aggregated distribution pattern according to the plant phenological stages. However, the distribution of mite species throughout time showed different types of aggregation. On the other hand, we found positive associations among A. lycopersici and T. merganser phytophagous mites with A. similoides, E. mesembrinus and M. (M.) negundinis predators mites. The association between plants and mite species were influenced by the phenological stages of Pequin chili pepper. This is an indication of the complexity among trophic-chain interactions that depend largely on the available resources and competition. These two factors serve as foundations for settlement, development and dispersion patterns of certain species.

Some Records of Eriophyoid Mites (acari: Eriophyoidea) from Malda District of West Bengal, India

This paper reports a total of 15 eriophyoid species collected from Malda district of West Bengal, India providing their host records, collection localities (including GPS data) and a remark wherever observed. Out of this 15 species except only 1 species viz., Aculops spondiasis Chakrabarti and Sarkar all other 14 species has been are reported for the first time from Malda district of West Bengal, India.

Ptyctimous mites (Acari: Acariformes: Oribatida) as zooindicators of changes in Dorrigo National Park in Australia (North Coast Bioregion)

The authors of the study present an analysis of the structure and changes in the examined community of ptyctimous mites (Acari: Acariformes: Oribatida) found in Dorrigo National Park in Australia. The research was conducted during two periods: between 1990 and 1993 and later in 2007. The analysed mite community comprises 35 species, though, the dominance and frequency of particular species were different for each period. In the first research period (1990–1993) in the area of Dorrigo National Park, 28 species were recorded, whereas in 2007 – 23 species were found. There were 16 species that occurred in both research periods, and 12 species only in the samples collected in the 90’s, and 7 species only in those collected in 2007. The analysis also embraces the geographical distribution of the species in the area of Australia. Three species were designated as endemic, occurring only in the area of the examined national park (Austrophthiracarus dissonus Niedbała et Collof, 1997, Austrophthiracarus parapulchellus Niedbała, 2006 and Notophthiracarus distinctus Niedbała, 1989). The analysed samples contained only few specimens of these species. Due to the low abundance, great rarity of the local populations and high endemism, these species should be regarded as potentially endangered (EN according to the IUCN scale). A comparative analysis of the community from Dorrigo National Park (New South Wales) with those found in other larger areas of Australia in Victoria (Otway Ranges Area, Yarra Ranges Area, Strzelecki Ranges Area and Errinundra Plateau Area) examined by Niedbała and Szywilewska-Szczykutowicz (2017) has revealed that the communities found in Dorrigo National Park contained far more species, which constituted 30% of the whole fauna of Australia. In contrast to the communities of ptyctimous mites from Dorrigo, the individual communities in the area of Victoria contained only between 5% and 14% of all known species in Australia from this group.

Phytoseiid mites (Acari: Mesostigmata) from Apulia (Southern Italy), with a key to the species reported from Italy

ABSTRACT The objective of this paper is to provide a taxonomic appraisal of the phytoseiids mainly from Apulia, Italy, through the examination of 1055 specimens collected in the areas of that district. Reports of occasional collection in Basilicata and Molise areas are also listed (16 specimens). The mite specimens were collected on the main cultivated and ornamental plants, and on spontaneous plants as well. Complementing the morphological characterization of the species collected is provided. This is the first wide report survey on the phytoseiid fauna in Apulian territories. This study reports on nine new records of Phytoseiidae for Apulia region (Southern Italy). Typhlodromus (Typhlodromus) exhilaratus Ragusa was the most frequent or abundants species sampled. Also, some other species, i.e. Phytoseiulus persimilis Athias-Henriot and Amblyseius swirskii Athias-Henriot, were collected and are potential taxa for biocontrol. In addition, a dichotomous key to separate phytoseiid mite species listed from Italy was provided.

DNA barcodes enable higher taxonomic assignments in the Acari

Although mites (Acari) are abundant in many terrestrial and freshwater ecosystems, their diversity is poorly understood. Since most mite species can be distinguished by variation in the DNA barcode region of cytochrome c oxidase I, the Barcode Index Number (BIN) system provides a reliable species proxy that facilitates large-scale surveys. Such analysis reveals many new BINs that can only be identified as Acari until they are examined by a taxonomic specialist. This study demonstrates that the Barcode of Life Datasystem’s identification engine (BOLD ID) generally delivers correct ordinal and family assignments from both full-length DNA barcodes and their truncated versions gathered in metabarcoding studies. This result was demonstrated by examining BOLD ID’s capacity to assign 7021 mite BINs to their correct order (4) and family (189). Identification success improved with sequence length and taxon coverage but varied among orders indicating the need for lineage-specific thresholds. A strict sequence similarity threshold (86.6%) prevented all ordinal misassignments and allowed the identification of 78.6% of the 7021 BINs. However, higher thresholds were required to eliminate family misassignments for Sarcoptiformes (89.9%), and Trombidiformes (91.4%), consequently reducing the proportion of BINs identified to 68.6%. Lineages with low barcode coverage in the reference library should be prioritized for barcode library expansion to improve assignment success.

Diversity of edaphic Gamasina mites (Acari: Mesostigmata) in different ecosystems of the Caatinga biome in northeast Brazil

Knowledge of the fauna of soil mites in Brazilian soils is still scarce and limited to a few regions, referring almost exclusively to areas of natural vegetation. The purpose of this research was to evaluate the abundance and diversity of edaphic Gamasina mites (Mesostigmata) on ecosystems of natural vegetation and cultivations of prickly pear, cassava and pasture located in the Caatinga biome in the state of Alagoas, northeast Brazil. Collections were carried out every three months between December 2018 and August 2019. In each collection date and in each ecosystem, 16 soil samples were collected. During the study, a total of 2,979 Gamasina were collected. Representatives of 10 families were identified, one of which, new to science. The largest number of Gamasina collected belonged to Ascidae (60%), followed by Laelapidae (14.3%) and Rhodacaridae (10%). Forty-four morphospecies were found, of which 25 new to science, distributed in 22 genera, two new to science. Protogamasellus mica Athias-Henriot, Protogamasellus sigillophorus Mineiro, Lindquist & Moraes and a new species of Protogamasellus (Ascidae) were the most abundant species. Mean abundance and richness were highest in the natural vegetation (respectively 38.2 mites and 12.6 species per sample), followed by prickly pear (29.6 and 8.6), pasture (20.8 and 8.6) and cassava (10.9 and 5.7). The Shannon-Weaver’s index diversity was highest for pasture (2.6) and lowest for the natural vegetation (2.2). The equitability indexes were quite similar in the different ecosystems though slightly lower in the natural vegetation (0.7 in the natural vegetation and 0.8 in other ecosystems). A cluster analysis indicated that the area of natural vegetation was the most distant from the others. Several of the species collected belong to Laelapidae and Macrochelidae, families with species used in the applied biological pest control. Thus, it is hoped that this work will serve as a basis for future applied research, aimed at prospecting Gamasina potentially useful for use in biological control programs.

Mite communities (Acari: Mesostigmata, Oribatida) in the red belt conk, Fomitopsis pinicola (Polyporales), in Polish forests

The fruiting bodies of bracket fungi are a specific microhabitat colonized by various invertebrates of which mites (Acari) are rarely studied, and if they are, the study is usually faunistic. The aim of the research was to determine whether the diversification of mite assemblages (Mesostigmata, Oribatida) inhabiting the fruiting bodies of Fomitopsis pinicola (Sw.) P. Karst. (Polyporales) are connected with the character of the forests and/or the degree of decay (DD) of the fruiting bodies. The research was conducted at Białowieża National Park (BNP), in forests close to natural ones and in Karkonosze National Park (KNP) which was affected by a large-scale forest dieback in the 1980s. Eighty fruiting bodies (40 at each study site) of F. pinicola belonging to four DD categories were collected. In total, 4,345 individuals of 120 mite species were recorded at BNP, and 13,912 individuals of 96 species were recorded at KNP. Analyses revealed that the sample dispersion at each study site was comparable, nevertheless the samples from each study site were clearly grouped into slightly overlapping sets which allow observation of the differences between them. In the less decayed fungi (DD 1 and 2) there were fewer mite species and individual mites than in the more decayed samples (DD 3 and 4). There were also significant differences between the fauna of the fungi in each particular DD: the fauna of DD 1 differed from all others, whereas the fauna of heavily decayed fungi (DD 3 and 4) was more comparable.

Rediscovery of two gamasid mites (Acari: Mesostigmata) associated with beetles in Western Siberia, Russia

ABSTRACT We provide the first description of the female of Dendrolaelaps sinodendronis Wiśniewski and Hirschmann (Acari: Mesostigmata: Digamasellidae) associated with Sinodendron cylindricum (L.) (Coleoptera: Lucanidae) from Tyumen Province, Western Siberia, Russia. We also redescribe Proctolaelaps epuraeae Hirschmann (Acari: Mesostigmata: Melicharidae) from the adult female, collected on Cucujus sp. (Coleoptera: Cucujidae) in Tyumen Province, Western Siberia, Russia.

The presence of rainbow trout reduces drift of aquatic insects in Yungas streams (Tucumán, Argentina)

The drift or transport of individuals downstream is an important phenomenon of rivers and streams, since most aquatic organisms participate in it at some period of their life cycle. This work describes the assemblage of macroinvertebrate drift from ten sites in eight mountain streams of Tucumán, and evaluates the effect of the presence of rainbow trout (Oncorhynchus mykiss Walbaum), an exotic fish and visual predator, on this fraction of the community. Thirty-one (31) families of drifting aquatic invertebrates were identified, mainly immature insects and to a lesser extent water mites (Acari: Hydrachnidia), oligochaetes (Annelida: Oligochaeta) and nematodes (Nematoda). The richness and diversity of the sites with trout did not differ from the others, except when comparing lower and upper reaches of a same stream. Samples from rivers without trout or with low density of trout did not show significant changes in drift density of macroinvertebrates. In contrast, in rivers with high trout densities, a notable decrease in insect taxa was observed (those with large sized individuals): Baetidae (Ephemeroptera), Gripopterygidae (Plecoptera) and Leptoceridae (Trichoptera). On the contrary, the density of small Diptera, water mites, oligochets and nematodes increased in trout-streams

Soil mite communities (Acari: Mesostigmata) as indicators of urban ecosystems in Bucharest, Romania

The aim of the present study was to establish the effect of management type and of environmental variables on the structure, abundance and species richness of soil mites (Acari: Mesostigmata) in twelve urban green areas in Bucharest-Romania. Three categories of ecosystem based upon management type were investigated: protected area, managed (metropolitan, municipal and district parks) and unmanaged urban areas. The environmental variables which were analysed were: soil and air temperature, soil moisture and atmospheric humidity, soil pH and soil penetration resistance. In June 2017, 480 soil samples were taken, using MacFadyen soil core. The same number of measures was made for quantification of environmental variables. Considering these, we observed that soil temperature, air temperature, air humidity and soil penetration resistance differed significantly between all three types of managed urban green area. All investigated environmental variables, especially soil pH, were significantly related to community assemblage. Analysing the entire Mesostigmata community, 68 species were identified, with 790 individuals and 49 immatures. In order to highlight the response of the soil mite communities to the urban conditions, Shannon, dominance, equitability and soil maturity indices were quantified. With one exception (numerical abundance), these indices recorded higher values in unmanaged green areas compared to managed ecosystems. The same trend was observed between different types of managed green areas, with metropolitan parks having a richer acarological fauna than the municipal or district parks.

Ptyctimous mites (Acari, Oribatida) of the Azores

Seven soil samples have been collected on four islands of the Azores, in which 14 species of ptyctimous mites (Acari, Oribatida) were found. One new species Phthiracarus andreasi Niedbała sp. nov. from Faial Island is described. Four species have been recorded for the first time from the Azores. Molecular analysis showed that the differences in the sculpture patterns in Euphthiracarus excultus Pérez-Iñigo, 1987 represent within-species variability. However, the length of body setae can separate two different species: Phthiracarus atlanticus Pérez-Iñigo, 1987 sensu stricto and Phthiracarus falciformis Morell & Subías, 1991, despite the absence of any other morphological differences. On the basis of our morphological and molecular data, a key to species from the Azores is provided.

Patterns of Diversity in the Symbiotic Mite Assemblage of the Mountain Pine Beetle, Dendroctonus Ponderosae Hopkins

The mountain pine beetle, Dendroctonus ponderosae (Coleoptera: Scolytinae), is an economically important bark beetle species with a wide geographic range spanning from the southwestern United States into northern Canada. This beetle causes extensive tree mortality to 13 pine species. Mites (Acari) are common and abundant symbionts of mountain beetles that may influence their fitness through positive and negative interactions. We present a unique assessment of the mite associates of mountain pine beetles using measures of alpha and beta diversity. We sampled phoretic mites from five beetle populations: Arizona, Colorado, South Dakota, Utah (USA), and Alberta (Canada) that varied in host tree species, local climate, and beetle population level. We collected 4848 mites from 8 genera and 12 species. Fifty to seventy percent of beetles carried mites in flight with the highest mite loads occurring in middle and southern populations; decreasing in northern populations. Mite assemblages (i.e., both richness and composition) varied along a south to north latitudinal gradient and were driven by species turnover (i.e., species replacement). Differences in mite composition increased with distance between populations. We discuss climatic variation, environmental filtering, and host tree differences as factors that could affect differences in mite composition between beetle populations and discuss implications for functional shifts. Our results could represent a model for estimating diversity patterns of mite symbionts associated with other major insect pests in coniferous forest systems.

<p class="Body"><strong>New records of water mites (Acari: Hydrachnidia) from Sri Lanka with description of four new species and some remarks of relationships</strong></p>

New records of water mites (Acari: Hydrachnidia) from the standing waters of Sri Lanka are presented. Fifteen species have been registrated, among them four species, i.e. Piona srilankana (Pionidae), Neumania edytae (Unionicolidae), Krendowskia (Krendowskiella) srilankana (Krendowskiidae), and Mideopsis ewelinae (Mideopsidae) are described as new to science. DNA was extracted from 18 water mite specimens and DNA barcodes are given for the first time for nine species.

Three New Species of Mites (Acari: Acaridae and Histiostomatidae) Extracted from the Soil under Pomegranate Trees, Assiut, Upper Egypt

Three New Species of Mites (Acari: Acaridae and Histiostomatidae) Extracted from the Soil under Pomegranate Trees, Assiut, Upper Egypt

Three New Species of Mites (Acari: Acaridae and Histiostomatidae) from Manure and Dung- Hills, Assiut, Upper Egypt

Three new species (Myianoetus manurei n. sp, Myianoetus assiuti n. sp. and Acotyledon shortisetoses n. sp.) represented only by their hypopial nymphs (heteromorphic deutonymphs), extracted from manure and dung-hills, Assiut, Upper Egypt. The holotype deutonymph and paratype deutonymphs of each species are deposited in the Acari collection of Plant Protection Department, Faculty of Agriculture. Assiut University, Assiut 71526 Egypt. The descriptions and illustrations of the new species are given below.