Two new species of miniature psammophilic sarcoglanidine catfishes of the genus Microcambeva from the Atlantic Forest of eastern Brazil (Siluriformes: Trichomycteridae)

ABSTRACT

Trichomycterid catfishes of the Sarcoglanidinae, which includes small-sized species living in sandy river substratum, have been poorly represented in collections. We herein describe two new species of the sarcoglanidine genus Microcambeva, endemic to river basins draining the Brazilian Atlantic Forest. The presence of a distal widening on the posterior process of the autopalatine and a rudimentary anterior autopalatine ossification shared by the two new species, M. mucuriensis sp. nov. from the Rio Mucuri and M. jucuensis sp. nov. from the Rio Jucu basin, and M. draco from the Rio Jucuruçu basin indicates that these three species are more closely related to each other than to other congeners. Microcambeva mucuriensis seems to be more closely related to M. draco than to M. jucuensis in that the first two species share the presence of a well-developed anterior process of the interopercle. The two new species are also distinguished from congeners by the number of opercular odontodes and premaxillary teeth, and the relative size of the sesamoid supraorbital. Available evidence taken from this study and previous reports indicates that different sarcoglanidine lineages have adapted to live in distinct riverine habitats, with species of Atlantic Forest Microcambeva inhabiting clearwater streams and Amazonian sarcoglanidines found in tea-stained acidic-water streams.

http://www.zoobank.org/urn:lsid:zoobank.org:pub:8CFF9C88-1CEC-44AF-AD26-1D4A56F3D946     

A new genus and species of Sarcoglanidinae (Siluriformes: Trichomycteridae) from southeastern Brazil,with a re-examination of subfamilial phylogeny

Microcambeva barbata, n. gen. et sp., is described from rio São João, Estado do Rio de Janeiro. It is proposed as the sister group of Malacoglanis and Sarcoglanis, on the basis of three characters: pectoral fin longer than the head, pectoral fin rays projecting well beyond the fin membrane, and a forked caudal fin. Monophyly of the Sarcoglanidinae is confirmed by the unique possession of a long lateral process on the premaxilla and a separate anterior ossification on the palatine. A sister group relationship between the Sarcoglanidinae and the Glanapteryginae is supported by four synapomorphies: a posteriorly directed dorsal process on the quadrate, a large dorsal anteriorly directed process on the hyomandibula, vomer reduced and generalized miniaturization. A more inclusive group composed of Sarcoglanidinae, Glanapteryginae, Tridentinae, Vandeliinae and Stegophilinae is considered monophyletic, since they all exhibit a reduced interopercular patch of odontodes, a reduced or absent metapterygoid, reduction in the number of pleural ribs, and lack an elongate process on the parasphenoid.     

A new genus and two new species of Pudeoniscidae Lemos de Castro 1973 (Crustacea: Isopoda: Oniscidea) from Brazil

To date, the family Pudeoniscidae includes six species and three genera, Pudeoniscus, Brasiloniscus and Iansaoniscus, with distributions restricted to Brazil. Here, we redefine the family Pudeoniscidae based on the discovery of a new genus and two new species, Oxossioniscus pataxo sp. nov. and Oxossioniscus akoko sp. nov., from the Brazilian Atlantic forest in the state of Bahia, and on the examination of Pudeoniscus birabeni and Pudeoniscus obscurus. Moreover, P. obscurus is re-described and new records are provided for P. birabeni.

http://www.zoobank.org/urn:lsid:zoobank.org:pub:A0123730-C623-49CE-8665-AE17FDDF994A.     

A revision of the south Asian sisorid catfish genus Sisor (Teleostei: Siluriformes)

The south Asian sisorid catfish genus Sisor is revised. Three new species are described in this study: S. chennuah from the Brahmaputra River drainage, and S. rheophilus and S. torosus from the Ganges River drainage. The body depth, snout length, eye size, shape of the nuchal plate and the numbers of pectoral spine serrations and lateral line ossicles are found to be diagnostic characters for the species. Sisor rabdophorus is redescribed and a neotype designated.     

Two new Geoplaninae species (Platyhelminthes: Continenticola) from Southern Brazil based on an integrative taxonomic approach

The genera Cratera Carbayo et al., 2013 and Obama Carbayo et al., 2013, belonging to the subfamily Geoplaninae, were recently proposed to encompass some of the species that belonged to the genus Geoplana Stimpson, 1857. Herein we describe two new species of Geoplaninae, occurring in areas of ombrophilous forest which belong to the southern portion of the Brazilian Atlantic Rain Forest. The species are sympatric in their type-locality. In general, both new species herein described match the diagnostic characteristics of their genera. However, some of these features are noteworthy when characters of the new species are taken into consideration, especially the pattern of the sensory pits and the morphology of the prostatic vesicle. Both species are differentiated from their congeners by a combination of morphological characteristics, corroborated by phylogenetic analyses of the cytochrome c oxidase subunit I gene, using maximum likelihood and Bayesian inference, as well as the Automatic Barcode Gap tool.     

A new genus and two new species of Argeiinae (Crustacea: Isopoda: Bopyridae) from the Indo-west Pacific

Three hosts from Indo-west Pacific including Kiribati, Guam Island and Australia were examined, and found to be infested by three species of the subfamily Argeiinae. We describe Paraeragia kiribatiensis gen. nov., sp. nov. from Kiribati infesting Synalpheus gracilirostris. The new genus is most related to Eragia and it can be distinguished by female with triangular pleon, lateral plates extend posteriorly, paired uropods, widely opened brood pouch. Argeiopsis guamensis sp. nov. from Guam Island infesting Synalpheus cf. stimpsoni. The new species is most similar to Argeiopsis inhacae but differs in female with curved posterior margin of first oostegite, partly fused pleomeres, and male with head separated from first pereomere, pleon as wide as seventh pereomere. We also record Stegoalpheon kempi from Australia for the first time, infesting Alpheus cf. perplexus. Keys to the nine genera of Argeiinae, and to three species of Argeiopsis are provided. A table for all 13 species of Argeiinae with localities and host records is also provided. A table comparing the distribution of lateral plates and morphology of pleopods and uropods among argeiine genera is presented.

http://www.zoobank/urn:lsid:zoobank.org:pub:284AB32C-6AE5-45BC-9C5D-01B3030D6DE6     

Biodiversity and biogeography of the coral boring barnacles of the genus Berndtia (Cirripedia: Acrothoracica) in the West Pacific,with description of three new species

Acrothoracican barnacles of the genus Berndtia are exclusive coral borers and the type species is Berndtia purpurea Utinomi, 1950a, reported in the corals Lepastrea purpurea and Psammocora profundacella in Wakayama, Japan. We confirmed the type is only from the coral Lepastrea purpurea and is distributed from Japan, Taiwan to Hong Kong. In contrast, B. purpurea from Psammocora belongs to a new species Berndtia haradai sp. nov., which is distributed from Japan to Okinawa. The other new species identified in the present study, Berndtia denticulata sp. nov. is common in Okinawa but also collected on the Pacific side of the Philippines. Berndtia utinomii sp. nov. is found on NE coast of Taiwan, Kochi and Wakayama in Japan and Vietnam but is absent from Okinawa. All described species are diagnostic in the coloration and morphology of the opercular bars in live specimens, morphology of posterior lobes of operculum and the number of notches in maxillules.

http://zoobank.org/urn:lsid:zoobank.org:pub:8B6FE5B4-C5DD-48DE-B91A-39BBBAF87636     

On the South American species of the genus Meridiosignum (Crustacea: Isopoda: Asellota: Paramunnidae)

Meridiosignum undulatum n. sp. and M. disparitergum n. sp. are described from off the Río de la Plata estuary. These two new species are easily distinguished from other members of the genus Meridiosignum in having the lateral margins of pereonites 2 and 3 bilobed (the concavity is much more pronounced in M. disparitergum), and those of pereonite 4 produced into a single process. The terminal male instar of Meridiosignum menziesi (Winkler, 1994 Winkler, H. 1994. Paramunnidae (Crustacea: Isopoda: Asellota) from the Magellan Strait.. Zool J Linn Soc., 110: 243–296. [Crossref] , [Google Scholar]) is described, and this species is herein reported from the Beagle Channel and Puerto Deseado. All the species currently placed in Meridiosignum were found in shallow waters in the southern hemisphere, M. undulatum n. sp. and M. disparitergum n. sp. being the species recorded at the greatest depth (129 m).     

Revision of the cleptoparasitic bee genus Austrostelis Michener and Griswold (Hymenoptera: Apidae: Megachilinae)

A taxonomic revision for the species of Austrostelis Michener and Griswold is provided. Ten species are recognized, one of which is newly described, A. saltensis Parizotto and Urban sp. nov., from Argentina. Additionally one new synonym is proposed and a lectotype for Stelis iheringi Friese, 1925 is designated. A revised diagnosis for the genus, illustrations and identification key for all species are also provided.

http://zoobank.org/urn:lsid:zoobank.org:pub:8397FEAE-45CB-444C-8B3C-6D706E752068     

First record of the genus Atlantistylis Reyss, 1975 (Crustacea: Cumacea) from the North Atlantic,with the description of a new species

A new species of the genus Atlantistylis Reyss, (Diastylidae) is described from the Atlantic Frontier Margin (North‐East Atlantic). This is the first record of the genus Atlantistylis from the North Atlantic. The new species Atlantistylis borealis can be recognized by the presence of spines on the frontal and lateral lobes of the carapace combined with their absence on the pereon and pleon; the first pereopods are very long. The small telson with two small apical acuminate setae and the absence of pleopods in the male are characteristic of the genus.     

Three new Brazilian species of the land planarian Choeradoplana (Platyhelminthes: Tricladida: Geoplaninae), and an emendation of the genus

Three new Brazilian species of the neotropical land planarian genus Choeradoplana (Platyhelminthes: Tricladida: Continenticola: Geoplaninae) are described, making a total of nine species within the genus. All the new species share unique derived characters typical of the genus. Two of the new species exhibit important features representing morphological variations that were previously unknown for the genus: the dorsal cutaneous longitudinal muscle layer, as well as the ventral one, partially sunken into the parenchyma in one species, and the common ovovitelline duct approaching the copulatory apparatus ventrally in the other. As a consequence of these morphological variations, an emendation of the genus is proposed.     

Four new and six known species of the genus Dorylaimellus Cobb, 1913 (Nematoda: Belondiridae) from India

Four new and six known species of Dorylaimellus Cobb, 1913 Cobb, NA. 1913. New nematode genera found inhabiting freshwater and non-brackish soils. J Wash Acad Sci, 3: 432–444. [Crossref] , [Google Scholar] are described. Dorylaimellus shamimi sp. nov. has body 1.1–1.2 mm, offset lip region, odontostyle 7–8 μm, pharyngeal expansion 35–43%, longitudinal vulva, amphidelphic gonad and conoid ventrally arcuate tail. Dorylaimellus parindicus sp. nov. has body 1.2–1.5 mm, distinct ventral body pores, lip region offset, odontostyle thick walled, 5–6 μm, odontophore with poorly developed flanges, pharyngeal expansion 38–45%, longitudinal vulva, amphidelphic gonad and short conoid tail. Dorylaimellus hanifae sp. nov. has body 0.3–0.4 mm, offset lip region with peri-oral disc, odontostyle 4–5 μm, pharyngeal expansion 50–55%, transverse vulva, amphidelphic gonad and clavate tail. Dorylaimellus khasianus sp. nov. has body 1.2–1.4 mm; offset lip region; odontostyle 7 μm; odontophore with well developed flanges; pharyngeal expansion 31–35%; longitudinal vulva; amphidelphic gonad and elongate-conoid tail. Dorylaimellus occidentalis, Dorylaimellus parvulus, Dorylaimellus deviatus, Dorylaimellus paraclavatus, Dorylaimellus salvus and Dorylaimellus filamentosus are redescribed.     

A new genus and three new species of parasitoid wasp from Papua New Guinea and redescription of Trigonophatnus Cameron (Hymenoptera,Braconidae, Rogadinae)

ABSTRACT

Two new pill millipede species, namely Hyleoglomeris hoanglien sp. nov. and H. fanxipan sp. nov., are described from high elevations (approximately 2,800–2,900 m) of the Hoang Lien National Park, northern Vietnam. A new species, H. hoanglien sp. nov. is clearly distinguished by the telopods being short, stout and incrassate, femora strongly condensed, tibia without modifications, syncoxital lobe bifid trapeziform, and syncoxital horns with an apical seta and a spine. Hyleoglomeris fanxipan sp. nov., is diagnosed by the telopods being long and robust, tibia without modifications, syncoxital lobe roundly trapeziform, and syncoxital horns truncated at tip. COI-based DNA barcodes of the two species are also provided for the first time in the genus Hyleoglomeris. The K2P genetic distance between the two new species is 0.148. In addition, an identification key to the Vietnamese Hyleoglomeris species is also provided.

http://www.zoobank.org/urn:lsid:zoobank.org:pub:6DEFED42-0D65-4F50-9D24-A0923B9D1709