Hyperiids (Amphipoda, Hyperiidea) collected during the TALUD cruises in western Mexico. 5. Family Amphithyridae, with the description of a new species of Amphithyropsis Zeidler

Zootaxa ◽  
2021 ◽  
Vol 5039 (4) ◽  
pp. 479-494
Author(s):  
REBECA GASCA ◽  
EDUARDO SUÁREZ-MORALES ◽  
MICHEL E. HENDRICKX
Keyword(s):  
New Species ◽  
Adult Male ◽  
Deep Sea ◽  
Gravid Female ◽  
Depth Range ◽  
Western Mexico ◽  
The Family ◽  
A New Species

In order to complete the information related to the little studied deep-sea planktonic fauna of western Mexico, samples from a wide depth range (surface to 1550 m depth) were obtained using different gear. Six species and 108 individuals of hyperiid amphipods of the family Amphithyridae were collected at 26 localities, including a new species of Amphithyropsis Zeidler, 2016, which is herein described based on an adult male and a gravid female. Other species include Amphithyrus bispinosus Claus, 1879, the most abundant and frequently collected species (70 specimens at 17 localities), A. muratus Volkov, 1982 (11 specimens at 8 localities), A. sculpturatus Claus, 1879 (14 specimens at 7 localities), Paralycaea gracilis Claus, 1879 (10 specimens from 6 localities), and P. hoylei Stebbing, 1888 (one specimen from one locality). Worldwide and regional distributions are provided for each species.  

A new species of Dahmsopottekina (Copepoda: Harpacticoida: Huntemanniidae) from the western Mediterranean deep sea

2011 ◽  
Vol 92 (5) ◽  
pp. 1043-1055 ◽  
Author(s):  
Katerina Sevastou ◽  
Paulo Henrique Costa Corgosinho ◽  
Pedro Martínez Arbizu
Keyword(s):  
New Species ◽  
Deep Sea ◽  
Sediment Traps ◽  
Morphological Characters ◽  
Western Mediterranean ◽  
Sexually Dimorphic ◽  
Depth Range ◽  
Mode Of Life ◽  
Study Support ◽  
A New Species

A new species of the genus Dahmsopottekina is described from the Mediterranean Sea. Dahmsopottekina guilvardi sp. nov. was collected from abyssal habitats at a depth range of 2340–2850 m. Like its congeners, the new species has a vermiform habitus, a highly transformed P1 in both sexes and a plough-like rostrum in the female. Dahmsopottekina guilvardi sp. nov. can be distinguished from its congeneric species by the combination of a fused basis and endopodite in P1 of both sexes and the absence of an endopodite in P2–P4 of the female. Dahmsopottekina guilvardi sp. nov. is the second record of a harpacticoid species after its congener D. peruana in which the basis and endopodite of a leg other than the P5, namely the P1, are fused. Furthermore, the new species is the only one among Dahmsopottekina species with a 1-segmented P1 exopodite in the male. Similar to its congeners, D. guilvardi sp. nov. is strongly sexually dimorphic. This is evident through the morphology of most of the cephalic appendages and the reduction of P2–P6 in the female. The results of the present study support the observation that Dahmsopottekina species are sparsely distributed and highly endemic. Nevertheless, our results do not agree with the statement of considerably larger females as the length variability between females is greater than between the two sexes. Despite the morphological characters of the species commensurate with a burrowing mode of life, its presence in sediment traps suggests that D. guilvardi sp. nov. is an active ‘swimmer’.

A new species of Robertgurneya Apostolov & Marinov, 1988, with an illustrated record of R. rostrata (Gurney, 1927), an amended genus diagnosis and comments on R. soyeri (Apostolov, 1974) and R. spinulosa (Sars, 1911) (Harpacticoida: Miraciidae)

Zootaxa ◽  
2020 ◽  
Vol 4861 (4) ◽  
pp. 451-485
Author(s):  
SAMUEL GÓMEZ
Keyword(s):  
New Species ◽  
New Genus ◽  
Organic Pollution ◽  
Coastal System ◽  
New Mexican ◽  
Western Mexico ◽  
The Family ◽  
Mexican Species ◽  
North Western ◽  
A New Species

Quarterly sampling campaigns were carried out during year 2019 to study the effects of organic pollution on the diversity and abundance of meiofauna from a polluted coastal system in north-western Mexico. Amongst harpacticoids, the family Miraciidae Dana 1846 was by far the most abundant and diverse, and several new species and the proposal of some new genera of Stenheliinae Brady 1880 and Diosaccinae Sars 1906 will be published elsewhere. Amongst the Diosaccinae, the genus Robertgurneya Apostolov & Marinov 1988 was one of the most abundant. This genus was proposed and diagnosed by Lang (1944, 1948) but after a complex taxonomical history, was made available by Apostolov & Marinov (1988) who proposed an amended diagnosis and designated R. similis similis (Scott A. 1896) as the type species of the genus. Here I propose a new species, Robertgurneya mexicana sp. nov., and give a fully illustrated record of the widely distributed R. rostrata (Gurney 1927). The relationships amongst the species of Robertgurneya are not clear, but the new Mexican species shares with R. falklandiensis (Lang 1936) the elongated inner dimorphic spine on the basis of the male P1. Additionally, a new amended diagnosis for the genus Robertgurneya, as well as the reallocation of R. soyeri (Apostolov 1974) into Typhlamphiascus Lang 1944, and the creation of a new genus, Robertgurneyella gen. nov., for R. spinulosa (Sars 1911) are proposed. 

Review of the Septibranchia (Pelecypoda: Mollusca) from deep sea of Campos Basin, Brazil: family Verticordiidae, with description of a new species

2009 ◽  
Vol 90 (4) ◽  
pp. 809-817 ◽  
Author(s):  
Cléo Dilnei de Castro Oliveira ◽  
Ricardo Silva Absalão
Keyword(s):  
New Species ◽  
Deep Sea ◽  
Depth Distribution ◽  
Brazilian Coast ◽  
Taxonomic Character ◽  
Campos Basin ◽  
Unknown Species ◽  
The Family ◽  
First Time ◽  
A New Species

Despite the increase in the number of deep-sea studies, little is known about the hadal molluscs. For Brazil, only a few studies have treated the Septibranchia. This contribution is part of an effort to increase the knowledge of this group off the Brazilian coast, although it is focused only on the Campos Basin (22°S), State of Rio de Janeiro. Four species of the family Verticordiidae are recognized here. ForSpinosipella tingaSimone & Cunha, 2008, the known depth distribution is extended to 1050 m. ForVerticordia woodiiSmith, 1885, previously reported from Brazil, the known distribution is extended southwards to the Campos Basin.Verticordia quadrataSmith, 1885, is reported from Brazil for the first time. A previously unknown species,Verticordia ouricurisp. nov., is described. The presence of small spines, typically with a hexagonal column and a stellate structure at their distal end emerges as an additional taxonomic character for the verticordiids.

A new species of Ammothea (Pycnogonida) and other pycnogonids from Livingston Island and surrounding waters (South Shetland Islands, Antarctica)

2001 ◽  
Vol 13 (2) ◽  
pp. 144-149 ◽  
Author(s):  
Tomás Munilla León
Keyword(s):  
New Species ◽  
Abundant Species ◽  
South Shetland Islands ◽  
Similar Species ◽  
Depth Range ◽  
Shetland Islands ◽  
West Antarctic ◽  
Livingston Island ◽  
The Family ◽  
A New Species

Fifty-nine species of pycnogonids belonging to sixteen genera and eight families were collected during a cruise near Livingston Island and surrounding waters, from depths between 0 and 1019 m. The new species Ammothea bentartica is described fully, illustrated and compared with similar species. The family Nymphonidae had both the greatest number of species (20) and number of specimens (67% of 1201). The most abundant species were Nymphon charcoti and N. australe. Nymphon paucidens and Pallenopsis buphtalmus were collected for a second time. The collections increased the geographical distribution of five species and the depth range of seven species. This collection appears typical of the West Antarctic zone.

scholarly journals New psychropotid species (Echinodermata Holothuroidea Elasipodida) of the Western Pacific with phylogenetic analyses

2021 ◽  
Author(s):  
Chuan Yu ◽  
Dongsheng Zhang ◽  
Ruiyan Zhang ◽  
Chunsheng Wang
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Deep Sea ◽  
Phylogenetic Analyses ◽  
The Other ◽  
Western Pacific ◽  
Morphological Examination ◽  
The Family ◽  
The Western Pacific ◽  
A New Species

Holothurians of the family Psychropotidae are widely distributed, but remain least studied deep-sea holothurians. On an expedition in the Western Pacific, six psychropotid specimens were collected by the Jiaolong human operated vehicle (HOV). Through morphological examination, four of them were identified as a new species, Benthodytes jiaolongi sp. nov., which was characterized as having minute papillae, narrow brims, and terminal anus; the ossicles were either rods or primary crosses. The remaining two specimens were identified as Psychropotes verrucicaudatus Xiao, Gong, Kou & Li, 2019, which was first recorded at the Kyushu-Palau Ridge. The phylogenetic analysis confirmed the classification status of B. jiaolongi and P. verrucicaudatus, and indicated a paraphyletic relationship within the genus Benthodytes. The new species clustered with Benthodytes sanguinolenta and was separated from the clade containing the other Benthodytes species.

scholarly journals Deep-sea Ampharetidae (Polychaeta) from Capbreton Canyon (north-east Atlantic) with the description of a new species

2014 ◽  
Vol 94 (5) ◽  
pp. 947-967 ◽  
Author(s):  
Florencio Aguirrezabalaga ◽  
Julio Parapar
Keyword(s):  
New Species ◽  
Deep Sea ◽  
Benthic Macrofauna ◽  
Bay Of Biscay ◽  
East Atlantic ◽  
North East ◽  
The Family ◽  
First Time ◽  
A New Species ◽  
Icelandic Waters

During the Capbreton cruises (1987–1990), samples of bathyal benthic macrofauna were taken at 37 stations situated along the continental slope (480–1113 m depth) of the Capbreton Canyon (Bay of Biscay, north-east Atlantic). Ten species of polychaetes belonging to six genera (Melinna, Eclysippe, Amphicteis,Anobothrus, GlyphanostomumandTanseimaruana) of the family Ampharetidae Malmgren, 1866 were collected at 13 of these stations. Most of these species are reported for the first time in the area.Amphicteisaff.wesenbergaeis reported for the first time after its recent description and a new species belonging to the genusGlyphanostomumis here described. Moreover, the finding ofMelinna monoceroidesrepresents the northernmost record of the species;Tanseimaruana vestisis recorded for the second time from the East Atlantic after its recent finding in Icelandic waters;Anobothrusaff.gracilisis reported for the second time from the Iberian Peninsula, representing, the southernmost record of the species in the Atlantic Ocean. The potential identification of two fragments of an Ampharetinae indet asAnobothrus laubieri, a deep water Arctic species, is discussed.

scholarly journals First record of the genus Kliopsyllus Kunz, 1962 (Copepoda Harpacticoida, Paramesochridae) from Northeastern Brazil with description of the deep-sea species Kliopsyllus minor sp. nov.

Zootaxa ◽  
2009 ◽  
Vol 2096 (1) ◽  
pp. 327-337 ◽  
Author(s):  
DANIELLE MENOR VASCONCELOS ◽  
GRITTA VEIT-KÖHLER ◽  
JAN DREWES ◽  
PAULO JORGE PARREIRA DOS SANTOS
Keyword(s):  
New Species ◽  
Deep Sea ◽  
First Record ◽  
Weddell Sea ◽  
Northeastern Brazil ◽  
The Family ◽  
Petroleum Company ◽  
Almost All ◽  
Pacific Species ◽  
A New Species

Sediment samples were collected from the deep sea adjacent to the State of Sergipe (Northeastern Brazil) within the framework of the Sergipe Continental Slope Environmental Characterization Project (coordinated by PETROBRAS, the Brazilian Petroleum Company S/A). These revealed a new species of the family Paramesochridae (Copepoda, Harpacticoida). Kliopsyllus minor sp. nov. is the smallest species discovered in this genus, with a body length of 0.19 mm in the adult male. Furthermore, it is one of the three Kliopsyllus species registered from the deep sea so far. In almost all Kliopsyllus species, the endopod of P4 is one-segmented. Only three species, i.e. Kliopsyllus andeep Veit-Köhler, 2004 from the abyssal Weddell Sea, a new species by Veit-Köhler and Thistle from the San Diego Trough (deep Pacific Ocean) and the new species presented here, show a two-segmented endopod in the P4. Kliopsyllus andeep is distinguished by the presence of strong, chitinous processes at the telson, and additional setae at the endopods of P3 and P4. The new Pacific species and the new species from Brazil can be distinguished by the shape of the segments of the swimming legs and detailed characteristics of their setae and spines.

scholarly journals New Psychropotid species (Echinodermata Holothuroidea Elasipodida) of the Western Pacific with phylogenetic analyses

2021 ◽  
Author(s):  
Chuan Yu ◽  
Chunsheng Wang ◽  
Dongsheng Zhang ◽  
Ruiyan Zhang
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Deep Sea ◽  
Phylogenetic Analyses ◽  
The Other ◽  
Western Pacific ◽  
Morphological Examination ◽  
The Family ◽  
The Western Pacific ◽  
A New Species

Holothurians of the family Psychropotidae are widely distributed, but are the least studied deep-sea holothurians. On the expedition of the Western Pacific, four holothurians specimens of the family Psychropotidae were collected by the Jiaolong human operated vehicle (HOV). Through morphological examination, two of them were identified as a new species, Benthodytes jiaolongi sp. nov., which was characterized as having minute papillae, narrow brims, and terminal anus; the ossicles were either rods or absent. The remaining two specimens were identified as Psychropotes verrucicaudatus Xiao, Gong, Kou & Li, 2019, which was firstly recorded at Kyushu-Palau Ridge (KPR). The phylogenetic analysis confirmed the classification status of B. jiaolongi and P. verrucicaudatus, and indicated a paraphyletic relationship within the genus Benthodytes. The new species clustered with Benthodytes sanguinolenta and was separated from the clade of the other Benthodytes species. Furthermore, B. sanguinolenta and B. jiaolongi sp. nov. was found to be different from the other Benthodytes species based on their morphology. Therefore, a revision of the genus Benthodytes is needed to solve its phylogenetic relationship.

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