Median Carina Research Articles

Stomatopod Crustacea of the Austral and Gambier Islands, French Polynesia

The stomatopods from the Austral and Gambier Islands, southern French Polynesia, collected primarily by the BENTHAUS Expedition (2002) are reported herein. Prior to the present study, only one species of stomatopod, Bathysquilla microps (Manning, 1961), was known from the Austral Islands and two from the Gambier Islands, Gonodactylus chiragra (Fabricius, 1781) and Pseudosquilla ciliata (Fabricius, 1787). Seven of nine species in the present collection are reported for the first time from the area, of which Gonodactylellus rubriguttatus (Erdmann & Manning, 1998) and Odontodactylus hawaiiensis Manning, 1967, are reported for the first time from French Polynesia. The series of specimens of G. rubriguttatus includes the largest known of the species, which also shows significantly longer accessory median carinae of the telson than previously reported. Owing to previous taxonomic instability in Chorisquilla excavata (Miers, 1880), the type species of its genus, it is redescribed based on type and other material.

Notes on the genus Navicordulia Machado & Costa, 1995 (Odonata: Anisoptera: Corduliidae s. str.): description of a new species, phylogenetic affinities and aspects of biogeography.

Based on a single male specimen, a remarkable new species of the genus Navicordulia is described from the Massif du Mitaraka in French Guiana (Tumuc-Humac Mountains). Another new species of this genus is also reported from the same locality but is not described. This is the first record of the genus from French Guiana, hitherto being unknown within a radius of more than 1000 km. Apparent rarity or absence of records is probably due to its secretive habits. Navicordulia tumucurakensis sp. nov. presents unique characters not present in other species of the genus including: almost no excavation of the anal angle, proximal sternal pilose ridge of abdominal segment 7 transformed into two large lateral oreillets disconnected from the median carina, additional distal sternal pilose ridge transformed into a medial knob, epiproct not extending beyond the distal half of the cerci, very long cerci surpassing those of described species, cerci lacking ventro-medial carina and tubercle and exhibiting a distal ventral brush of hair-like setae. It is a forest species inhabiting hilly landscapes at low altitude, unlike other closely related intertropical species which are encountered in more elevated areas above 850 m. It is most closely related to N. longistyla, a typical cerrado species from the central Brazilian plateau or possibly to N. nitens from the central south Venezuelan Guaiquinima Tepui. Based on unique derived male abdominal structures and also on the female ovipositor and related structures, the South American genus Navicordulia and the Southeast Asian/Melanesian genus Metaphya are considered current adelphotaxa. This disrupted geographic distribution could be explained by a common ancestor having had a Gondwanian dispersal until the Late Cretaceous or Paleocene.

Taxonomy of 'Euconnus complex'. Part X. Drastophus placed as a junior synonym of Tetramelus, and Smicrophus as a junior synonym of Napochus (Coleoptera, Staphylinidae, Scydmaeninae).

Drastophus and Smicrophus were originally described as genera of Nearctic Scydmaeninae. Drastophus was later synonymized with Euconnus s. str., and subsequently resurrected as a subgenus of Euconnus. Smicrophus was also proposed as a genus, and later placed as a subgenus of Euconnus. However, examination of the type species of each subgenus in the present study led to different conclusions. Drastophus laevicollis differs only in minor details from the type species of Euconnus (Tetramelus), namely in a shorter head, and the pronotum not constricted near base and lacking the median longitudinal antebasal carina. These differences are not sufficient to maintain Drastophus as a separate subgenus, and this name is placed as a junior synonym of Tetramelus. Smicrophus leviceps, in turn, is very similar to Euconnus (Napochus); the only differences in relation to the type species of Napochus are the pronotum broadest slightly in front of base instead of at base, head lacking bristles, lateral antebasal pronotal pits shifted to a more submedian position, and a different shape of hypostomal ridges. Some of these characters were previously found to be variable within Napochus, and others are only minor differences that can also be interpreted as variability within a subgenus. Consequently, Smicrophus is placed as a junior synonym of Napochus.

Hedotettix angulatus sp. nov. (Orthoptera: Tetrigoidea:Tetrigidae, Tetriginae) a new pygmy grasshopper species from India.

Hedotettix angulatus sp. nov. is described from Chhattisgarh, India. The new species is similar to Hedotettix grossus Hancock, 1915, it differs from the latter by (i) anterior margin of vertex angulate, (ii) ovipositor robust, length of upper valves 2.2 times its width, (iii) antennal grooves situated above the lower margin of the compound eyes, (iv) median carina of vertex strong and extended up to the posterior end of depression, (v) facial carinae are all most parallel, (vi) frontal costa bifurcation starts in about ¼ of the compound eye height, (vii) anterior margin of middle carina of pronotum depressed. A key to known species of the genus Hedotettix from the Indian subcontinent is provided. Type specimens are deposited in the Central Entomological Laboratory (CEL) of the Zoological Survey of India, Kolkata.

A new genus and species of axiid shrimp (Crustacea, Decapoda) from a southwestern Indian Ocean seamount

A new genus and species of axiid shrimp, Montanaxius mediumquod gen. et sp. nov., is described and illustrated based on three specimens collected from hexactinellid sponges from a seamount in the southwest Indian Ocean. The new genus is characterized by a laterally denticulate rostrum, short lateral carina, absence of submedian carina, a prominent toothed median carina, round pleomere pleura 2–5, pleurobranchs on second to fourth pereopods, and the presence of a male first pleopod and appendix interna on pleopods 3–5. It most closely resembles Levantocaris Galil & Clark, 1993 and Planaxius Komai & Tachikawa, 2008, but differs from the former by being gonochoristic, having a strongly elevated gastric region and well-developed eyes, and from the latter by its toothed median carina and the presence of a median telson spine.

A miniature notosuchian with multicuspid teeth from the Cretaceous of Morocco

ABSTRACTNotosuchians from Cretaceous continental environments of Gondwana have developed an unexpected array of morphologies comparable to mammals and their extinct relatives. However, this exceptional diversity is unbalanced, with South America holding nearly three times the generic diversity of Africa-Madagascar. With the exception of the triconodonts and of a very specialized group, the Gondwanatheria, in none of these landmasses do mammals dominate, and as a result, the low notosuchian diversity in Africa-Madagascar appears to be an artifact of sampling. Here, we describe a new miniature notosuchian from the Albian-Cenomanian Kem-Kem Beds of Morocco filling this gap. Lavocatchampsa sigogneaurussellae, gen. et sp. nov., exhibits a new type of heterodonty with absence of maxillary and dentary caniniform dentitions and teeth that gradually become massive posteriorly, and possess a sharp elongate median carina flanked by two multicusped cingula. The occlusion pattern is revealed by computed tomography and scanning electron microscopy (SEM) and shows that the main component of jaw closure is vertical, and not horizontal as has been proposed in closely related forms. Phylogenetic analysis recovers the new taxon as part of a basal stock of Gondwanan ziphosuchians with close affinities to Candidodon itapecuruense, Malawisuchus mwakasyungutiensis, and Pakasuchus kapilimai. We revise the diagnosis of Candidodontidae, a clade characterized by a particular heterodont dentition recalling that of triconodont mammals. The recognition of this new clade confirms previous hypotheses of a vicariant vertebrate assemblage present on a continuous South American–African landmass.http://zoobank.org/urn:lsid:zoobank.org:pub:0D35356B-67FF-49A2-A518-6C19961A0894SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at www.tandfonline.com/ujvpCitation for this article: Martin, J. E., and F. de Lapparent de Broin. 2016. A miniature notosuchian with multicuspid teeth from the Cretaceous of Morocco. Journal of Vertebrate Paleontology. DOI: 10.1080/02724634.2016.1211534.

A new genus of the tribe Acratini from the continental Neotropical region (Coleoptera: Curculionoidea, Brentidae)

A group of 10 species belonging to the Neotropical tribe Acratini Alonso-Zarazaga, Lyal, Bartolozzi & Sforzi 1999, is shown to be monophyletic by a phylogenetic analysis based on 48 morphological characters. A new genus, Pertusius n. gen., is described, based on three derived characters of external and genital morphology: venter of prorostrum of males with fine median longitudinal carina, base of elytra with deep pit at the place of insertion on mesonotum, and proximal sclerite of endophallus more or less horseshoe-shaped. Eight species were previously known and, according to former authors, belonged to the genera Acratus Lacordaire 1865 [Pertusius apicalis (Sharp 1895), n. comb., P. errabundus (Kleine 1927), n. comb., P. extrarius (Kleine 1927), n. comb., P. fidus (Kleine 1927), n. comb. and P. telesi (Soares & Meyer 1959), n. comb.] and Proteramocerus Kleine 1921 [Pertusius chalcites (Perty 1832), n. comb., P. filum (Sharp 1895), n. comb., and P. laevis (Germar 1824), n. comb.]. Four new synonymies are proposed: Proteramocerus disparilis Soares & Dias 1971, n. syn. for Acratus apicalis Sharp 1895; Teramocerus laevigatus Boheman 1840, n. syn. for Arrhenodes chalcites Perty 1832; Acratus extraordinarius Kleine 1927, n. syn. for Acratus errabundus Kleine 1927; Proteramocerus diringshofeni Soares & Dias 1971, n. syn. for Acratus filum Sharp 1895. Two new species are described: Pertusius guyanensis n. sp. from French Guiana, and P. mexicanus n. sp. from Mexico (Yucatán Peninsula). Pertusius apicalis is newly cited from Bolivia and Peru, P. chalcites from Argentina and Paraguay, P. extrarius from Ecuador, P. fidus from Peru and P. telesi from Trinidad and Tobago and Venezuela. An identification key to species of the genus is provided.

A New Crayfish of the Genus Cambarus (Decapoda: Cambaridae) From the Flint River Drainage in Northern Alabama and South Central Tennessee, U.S.A.

Examination of specimens of the crayfish species Cambarus (Hiaticambarus) longirostris and two recently described crayfish revealed the existence of an undescribed species from the Flint River watershed in northern Alabama and southern Tennessee. Cambarus (Hiaticambarus) lentiginosus differs from C. longirostris, C. (Hiaticambarus) andersoni, and C. (Hiaticambarus) diupalma in aspects of carapace and chela morphology and pigmentation pattern. Cambarus (H.) lentiginosus possesses a median carina on the dorsal surface of the acumen of the rostrum, a distinctly enlarged tubercle near the base of the opposable surface of the dactyl, and a speckled pigmentation pattern over a light base color; these characters are lacking in other known Hiaticambarus species. The known range of the species is restricted to the Flint River watershed. Cambarus (H.) lentiginosus is considered Endangered using American Fisheries Society conservation categorization.

A new pygmy grasshopper species (Tetrigidae: Tetriginae) from Central India.

Ergatettix subtruncatus sp. nov. is described from Durg district of Chhattisgarh, India. The new species is similar to Ergatettix callosus (Hancock, 1915), but differs from the latter by frontal cost bifurcation starts at the level of upper margin of compound eyes; median carina of vertex indistinct; posterior angle of lateral lobes of pronotum not broad, apex subtruncate, narrow; mid femur slender with small white hairs and 3indistinct lobes; dorsal valve of ovipositor less flattened. A distribution map of Ergatettix subtruncatus sp. nov. and a key to known species of the genus Ergatettix Kirby, 1914 from the Indian subcontinent is provided. The type specimens are deposited in the Central Entomological Laboratory (CEL), Zoological Survey of India, Kolkata.

A new genus and new species (Orthoptera: Acrididae: Oedipodinae) from India

A new genus of Oedipodinae, Chinabacris Kumar and Usmani gen. N. (type species Chinabacris trisulcata Kumar and Usmani sp. N.), is described and illustrated from India. The description was based on both conventional morphological and genitalic characters. The identifying features of the new genus are the dorso-ventrally compressed body and median carina of pronotum crossed by three transverse sulci. A key to the Indian genera of the subfamily edipodinae is also provided.

Pseudofornicia gen. n. (Hymenoptera, Braconidae, Microgastrinae), a new Indo-Australian genus and one new species from Vietnam

Pseudofornicia gen. n. (Hymenoptera: Braconidae: Microgastrinae) is described (type species: Pseudofornicia nigrisoma sp. n. from Vietnam) including three Oriental (type species, Pseudofornicia flavoabdominis (He & Chen, 1994), comb. n. and Pseudofornicia vanachterbergi Long, (nom. n. for Fornicia achterbergi Long, 2007; not Fornicia achterbergi Yang & Chen, 2006) and one Australian species (Pseudofornicia commoni (Austin & Dangerfield, 1992), comb. n.). Keys to genera with similar metasomal carapace and to species of the new genus are provided. The new genus shares the curved inner middle tibial spur, the comparatively small head, the median carina of the first metasomal tergite and the metasomal carapace with Fornicia Brullé, 1846, but has the first tergite movably joined to the second tergite and the third tergite 1.1–1.6 × as long as the second tergite medially and is flattened in lateral view. One of the included species is a primary homonym and is renamed in this paper.

A new species of the pteromalid wasp genus Hemitrichus Thomson (Hymenoptera, Chalcidoidea: Pteromalidae) from the Russian Far East

A new species of the genus Hemitrichus Thomson, 1878 (Hymenoptera, Pteromalidae), H. sugonjaevi sp. n., is described and illustrated from the Russian Far East. The new species differs from H. seniculus (Nees, 1834) in the following characters: POL about 1.6 times OOL, eye height 1.8 times malar space, propodeum with distinct, complete median carina, and antenna and legs mainly dark. A detailed morphological description is given.

New species of the genus Rhopalotettix Hancock, 1910 (Orthoptera: Tetrigidae, Metrodorinae) from Vietnam

Rhopalotettix vietnamensis sp. nov. is described from Vietnam. The new species is similar to R. chinensis Tinkham, 1939 in a distinct median carina of the fastigium (in all the other congeners, median carina is absent) and differs from the latter species by the rostrum with almost parallel lateral sides and by a narrow tegmen, visible part of which is 2.3 times narrower than mid femur (in R. chinensis, rostrum with the lateral sides gradually converging to the acute apex, and visible part of tegmen is almost as broad as mid femur).

Taxonomic Review Of The Genus Yunnantettix (Orthoptera, Tetrigidae) From The Oriental Region

Abstract Taxonomic review of the genus Yunnantettix Zheng, 1995 is given. It is similar to Aspiditettix Liang, 2009, Pseudepitettix Zheng, 1995, and Epitettix Hancock, 1907. Yunnantettix is the most similar to Aspiditettix in the general appearance, the rugose disc of the pronotum, and the bisinuate lateral lobe of the pronotum, and diff erent from it by the completely reduced hind wing and the position of the antennal socket. Yunnantettix is similar to Pseudepitettix and Epitettix in the moderately widened frontal ridge and low median carina of pronotum, but diff erent from the latter by the presence of the narrow tegmen and a shallow yet distinct tegminal (upper) sinus on the pronotal lateral lobe. Originally, Yunnantettix is a monotypic genus (type species: Yunnantettix bannaensis Zheng, 1995 from South China). Two species are additionally included to this genus: Yunnantettix elytratus (Günther, 1939), comb. n. (= Epitettix elytratus Günther, 1939) from India and Yunnantettix thaicus, sp. n. from Th ailand. Th e new species diff ers from all other species of this genus by the shallow excision on apex of the posterior pronotal process and by the external lateral pronotal carina, arch-like and strongly curved upward above the tegmen. A key to the species and redescription of the genus Yunnantettix are provided.

Notes on Species Diversity Patterns in Stizopina (Coleoptera: Tenebrionidae), with Description of a New Genus from Nama Karoo

Based on the newly acquired and previously published data the diversity patterns of Stizopina (Tenebrionidae: Tenebrioninae: Opatrini) are analyzed. At present, the subtribe consists of 101 species and subspecies (in 22 genera) distributed in the arid ecosystems of southern Africa and Madagascar. The highest diversity of species was reported from the Succulent Karoo ecoregion (near the Namibia-South Africa border). Vector data model for Endrödy-Younga's Coleoptera zones is provided. A new genus, Eichleria, with two new species (E. davidi, E. ostrowskii) of the subtribe Stizopina is described from the Nama Karoo ecoregion (Republic of South Africa). Eichleria differs from the related genera Amathobius and Nemanes in having mentum with median carina, convex pronotum, narrow intercoxal process of prosternum, fine pronotal and elytral sculpture, obtuse protibiae, and straight male mesotibiae.

A new tribe, a new genus, and a new species of the subfamily Dictyopharinae (Homoptera, Dictyopharidae) from Chile

Rancoda rakitovi gen. et sp. n. is described from Chile (the La Campana National Park, Valparaiso Region), for which a new monotypical tribe Rancodini trib. n. is established in the subfamily Dictyopharinae. The characteristic features of the new tribe are sharp brachyptery (the orgerioid habitus), the presence of sensory pits in the adults, two spines in the inner group on the apex of the hind tibia, a simple median carina on the abdominal tergites, and the straight margin between the metope and the clypeus. Similarity between the advanced representatives of the subfamily Orgeriinae (sensory pits in the adults) is convergent and is combined with the primitive characters which are absent in all the Orgeriinae but present in the Dictyopharinae.

Three new species of the subfamily Microgastrinae (Hymenoptera: Braconidae) from Vietnam

Three new species of the subfamily Microgastrinae (Hymenoptera: Braconidae) from Vietnam

Kirkamflata, a New Planthopper Genus from Socotra Island (Hemiptera: Fulgoromorpha: Flatidae)

Abstract. The paper describes a new genus of the Hemiptera: Fulgoromorpha: Flatidae, Kirkamflata gen. nov., and a new species K. socotrana sp. nov. from the Hagher Mountains in central Socotra island (Yemen). Habitus, external morphology, male and female terminalia and internal genital structures of the new species are illustrated. The new genus is similar to Latois Stal, 1866 in head morphology, wing shape and venation, male and female terminalia but differs in a rudimentary median carina on pronotum and mesonotum, longer apical cells of tegmen and details of the male reproductive parts: style, periandrium, aedeagus, as well as female ones: gonapophysis VIII and diverticulum ductus.

Taxonomic study of the planthopper genus Lacusa Stål, 1862 (Hemiptera, Fulgoromorpha, Lophopidae).

The planthopper genus Lacusa Stål, 1862 is reviewed. All species are illustrated and male genital characters are provided, and including two new species: L. digitata sp. n. and L. producta sp. n. from Yunnan Province, China. The species L. orientalis Liang, 2000 is removed from this genus based on the frons with median carina and fore femur and tibia flattened but not foliaceous. A key to species is also given. The type specimens of the new species are deposited in the Institute of Entomology, Guizhou University, Guiyang, China (GUGC).

A New Genus and Species of Delphacini (Hemiptera: Fulgoromorpha: Delphacidae) Associated with Hydrophytic Plants in Argentina

A new delphacid genus and species from Argentina, Lepidelphax pistiae Remes Lenicov, gen. et sp. nov.(Hemiptera: Fulgoromorpha: Delphacidae: Delphacini), is described and illustrated, and biological, distribution and experimental host range data are provided. Males of the new genus are easily distinguished from all other Neotropical Delphacini by being pale cream to white in color with a distinctive pair of longitudinal stripes on the face and symmetrical dark brown to black spots on the thorax and abdomen; very slender, laterally compressed, with long legs, narrow and short vertex with a small sub-apical areola continued by a distinctively simple frontal median carina. It also has unique malegenital structures. Laboratory and field data indicate this species is a specialized herbivore that feeds and oviposits exclusively on Pistia stratiotes (Alismatales: Araceae), a floating macrophyte native to South America. Lepidelphax pistiae was found throughout the distribution of P. stratiotes in Argentina.