Découverte d'une nouvelle espèce du genre Ptilocrinus (Échinodermes, Crinoïdes pédonculés) au large de Terre-Neuve

1990 ◽  
Vol 68 (6) ◽  
pp. 1132-1136 ◽  
Author(s):  
Michel Roux
Keyword(s):  
New Species ◽  
Atlantic Ocean ◽  
Deep Sea ◽  
First Record ◽  
Eastern Pacific ◽  
Geographic Isolation ◽  
The Family ◽  
Northern Atlantic

Ptilocrinus atlanticus sp. nov. belongs to the family Hyocrinidae (Echinodermata, stalked Crinoidea). That new species is the first record of the genus Ptilocrinus in the Atlantic Ocean. Skeletal organization of the arms suggests that it has a taxonomic place halfway between the genus Ptilocrinus (especially Ptilocrinus pinnatus from N.-E. Pacific) and the genus Anachalypsicrinus, only recorded from N.-E. Atlantic. Such a discovery confirms the phylogenic affinities between large hyocrinids of the eastern Pacific and those of the northern Atlantic. Geographic isolation of these two deep-sea provinces since the Uppermost Cretaceous took place after the differentiation of the two genera Ptilocrinus and Anachalypsicrinus.

Chirostyloidean squat lobsters (Crustacea: Decapoda: Anomura) from the Galapagos Islands

Zootaxa ◽  
2019 ◽  
Vol 4564 (2) ◽  
pp. 391 ◽  
Author(s):  
KEIJI BABA ◽  
MARY K. WICKSTEN
Keyword(s):  
New Species ◽  
Rift Zone ◽  
First Record ◽  
Galapagos Islands ◽  
Eastern Pacific ◽  
Galápagos Islands ◽  
The Family ◽  
Galapagos Rift ◽  
Squat Lobsters

Seven species of chirostyloidean squat lobsters are reported from the Galapagos Rift zone and Galapagos platform: Eumunida subsolanus n. sp. (Eumunididae), Heteroptychus galapagos n. sp., H. nautilus n. sp. (Chirostylidae), Uroptychus bellus Faxon, 1893, U. compressus n. sp., U. occidentalis Faxon, 1893 (Chirostylidae), and Sternostylus defensus (Benedict, 1902) (Sternostylidae). All new species are described and illustrated, and the two species previously known from the Galapagos Islands, Uroptychus bellus and U. occidentalis, are re-illustrated from respective lectotypes, herein designated, since both original descriptions were only brief. Both the species of Heteroptychus and Eumunida subsolanus are the first representatives of their respective genera in the eastern Pacific and the latter is also the first record for the family Eumunididae in the region. 

Myriotrochus (Oligotrochus) meteorensis spec. nov., a new myrio-trochid holothurian from the deep-sea off NW Africa (Echinodermata: Holothuroidea: Myriotrochidae)

Zootaxa ◽  
2005 ◽  
Vol 1078 (1) ◽  
pp. 33
Author(s):  
JENS MICHAEL BOHN
Keyword(s):  
New Species ◽  
West Africa ◽  
Atlantic Ocean ◽  
Deep Sea ◽  
First Record ◽  
Ne Atlantic ◽  
North West ◽  
Ne Atlantic Ocean

A new myriotrochid holothurian, Myriotrochus (Oligotrochus) meteorensis spec. nov., has been discovered in a deep-sea sample taken during an expedition with FS 'Meteor' (M 36) off north-west Africa, together with specimens of Molpadia musculus Risso, 1826, Hedingia albicans (Théel, 1886) and Protankyra cf. brychia (Verrill, 1885). The new species is similar to M. (O.) vitreus (M. Sars, 1866) and M. (O.) clarki Gage and Billett, 1986; it is thoroughly described and detailed measurements of wheel parameters are presented. This is the first record of a myriotrochid holothurian for the NE Atlantic Ocean south of 40°N.

New species of Tanaella Norman and Stebbing, 1886 (Crustacea: Tanaidacea: Tanaellidae) from the deep-sea off the Antarctic and the Angola Basin, with a key to the genus

Zootaxa ◽  
2004 ◽  
Vol 459 (1) ◽  
pp. 1 ◽  
Author(s):  
JÜRGEN GUERRERO-KOMMRITZ ◽  
MAGDALENA B½AÚEWICZ-PASZKOWYCZ
Keyword(s):  
New Species ◽  
Atlantic Ocean ◽  
Deep Sea ◽  
First Record ◽  
The Antarctic ◽  
Southern Atlantic Ocean

Three new deep-sea species in the genus Tanaella are described: two from the Antarctic (T. eltaninae sp. nov., T. kimi sp. nov.) and one from the Angola Basin (T. profunda sp. nov.). This is the first record of Tanaella in the deep-sea of the Antarctic and the southern Atlantic Ocean. A key to the 13 known species of the genus is provided.

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 Lumbrineridae (Polychaeta) from the Portuguese continental shelf (NE Atlantic) with the description of four new species

Zootaxa ◽  
2012 ◽  
Vol 3416 (1) ◽  
pp. 1 ◽  
Author(s):  
ROBERTO MARTINS ◽  
LUIS F. CARRERA-PARRA ◽  
VICTOR QUINTINO ◽  
ANA MARIA RODRIGUES
Keyword(s):  
Multivariate Analysis ◽  
New Species ◽  
Atlantic Ocean ◽  
Continental Shelf ◽  
Morphological Characteristics ◽  
First Record ◽  
The Other ◽  
Ne Atlantic ◽  
The Family ◽  
Water Depths

The present study reports four new species of the Family Lumbrineridae Schmarda, 1861, three in the genus Lumbrinerisde Blainville, 1828 and one in the genus Gallardoneris Carrera-Parra, 2006. The new species were found on the Portu-guese continental shelf at water depths ranging from 11 to 190 m. Gallardoneris iberica sp. nov. is the first record of thisgenus in the Atlantic Ocean and can be distinguished from the other two known Gallardoneris species by the distributionof the composite and the simple multidentate hooded hooks and the shape of the parapodial lobes. Lumbrineris luciliaesp. nov. has an arcuate, unidentate MIII and MIV unidentate with well-developed plate, digitiform wide basallypostchaetal lobes in anterior parapodia, composite multidentate hooded hooks with short blade. Furthermore, L. luciliaesp. nov. has simple multidentate hooded hooks of two sizes, preacicular hook twice as big as postacicular hook, and dis-tally curved aciculae in median and posterior parapodia. Both Lumbrineris lusitanica sp. nov. and Lumbrineris pinastersp. nov. are characterized by having MIII unidentate followed by a knob. However, L. lusitanica sp. nov. has digitiformwide basally postchaetal lobes in the anterior parapodia, composite multidentate hooded hooks with short blade and simplemultidentate hooded hooks with short hood; while L. pinaster sp. nov. has auricular postchaetal lobes in the anteriorparapodia, composite multidentate hooded hooks with long blade, and simple multidentate hooded hooks with short andlong hood. A multivariate analysis was performed upon morphological characteristics and validates the separation of the four new species. A taxonomic key to lumbrinerid species from Iberian waters is included.

scholarly journals Thylakogaster namibiensis sp. nov. (Isopoda: Asellota: Janiroidea), a new species of Haplomunnidae from the southeast Atlantic deep sea

Zootaxa ◽  
2009 ◽  
Vol 2096 (1) ◽  
pp. 381-394
Author(s):  
NILS BRENKE ◽  
ANIKA BUSCHMANN
Keyword(s):  
New Species ◽  
Atlantic Ocean ◽  
Deep Sea ◽  
The Other ◽  
The Family ◽  
Lateral Margins ◽  
A New Species

Thylakogaster namibiensis sp. nov., a new deep-sea species belonging to the family Haplomunnidae Wilson, 1976 is described from the southeast Atlantic Ocean. The differences of the new species to the other species of the genus Thylakogaster Wilson and Hessler, 1974 are discussed. Main characters distinguishing T. namibiensis sp. nov. from its congeners are the presence of cuticular spines on the lateral margins of the pereonites 1–7, the low number of spines on the pleotelson, and the number of five terminal flagellar articles bearing aesthetascs on the antenna 1 of the copulatory male. The new species, T. namibiensis, is the first member of this genus found in the southeast Atlantic Ocean and at a depth of 5415 m, it is also the deepest which a member of the genus has ever been found.

First record of the genus Pseudomesochra T. Scott (Harpacticoida: Pseudotachidiidae)in the South Atlantic with description of a deep-sea species: Pseudomesochralongiseta sp. nov.

Zootaxa ◽  
2008 ◽  
Vol 1866 (1) ◽  
pp. 337 ◽  
Author(s):  
DANIELLE MENOR VASCONCELOS ◽  
KAI HORST GEORGE ◽  
PAULO JORGE PARREIRA DOS SANTOS
Keyword(s):  
New Species ◽  
Deep Sea ◽  
First Record ◽  
South Atlantic ◽  
The South ◽  
The Family ◽  
Fourth Species ◽  
Petroleum Company ◽  
A New Species ◽  
Rat Tail

Samples collected during the Sergipe Continental Slope Environmental Characterization Project coordinated by PETROBRAS (The Brazilian Petroleum Company) revealed a new species of the family Pseudotachidiidae Lang, 1936 (Copepoda, Harpacticoida), Pseudomesochra longiseta sp. nov. This is the first record of the genus Pseudomesochra T. Scott, 1902 for the South Atlantic. Pseudomesochra longiseta sp. nov. can be distinguished from all species of the genus Pseudomesochra by the presence of four sensilla on the rostrum and a very long terminal “rat-tail” seta on the second segment of the antenna. It shares with P. tamara Smirnov, 1946 the addition of one inner seta on the first exopodal segment of the swimming legs 2–4 (P2–P4), a character absent in the remaining species of the genus. Pseudomesochra longiseta sp. nov. is the fourth species described within this genus with 2-segmented P2–P4 endopods. The inclusion of the new species in Pseudomesochra requires the modification of some autapomorphic characters of the genus, the most important being the presence of four sensilla on the rostrum, a character shared with other Pseudotachidiidae.

Trochochaeta mexicana, a new species from an unusual family of Polychaeta, with comments on the world distribution of Trochochaetidae

2010 ◽  
Vol 91 (2) ◽  
pp. 403-413 ◽  
Author(s):  
Pablo Hernández-Alcántara ◽  
Vivianne Solís-Weiss
Keyword(s):  
New Species ◽  
Northern Hemisphere ◽  
First Record ◽  
Eastern Pacific ◽  
Biogeographic Province ◽  
Cold Environments ◽  
The Family ◽  
The World ◽  
World Distribution ◽  
A New Species

The small, monogeneric family of polychaetes known as Trochochaetidae has been exclusively collected in the northern hemisphere, mainly in temperate–cold environments. Nine species have been described so far including Trochochaeta mexicana sp. nov. described herein, while one species remains unnamed. Only two species had previously been recorded in the eastern Pacific, so T. mexicana sp. nov. is the first record for the family in the tropical Mexican Biogeographic Province. The new species is characterized by having a pair of eyes, acicular neurochaetae on chaetigers 2 and 3, a small knob-like antenna and a nuchal crest projecting through chaetiger 1. Trochochaeta mexicana sp. nov., together with Trochochaeta kirkegaardi, Trochochaeta diverapoda and Trochochaeta cirrifera are the only trochochaetids that have been found exclusively in warm environments.

On the diversity of abyssal Dondersiidae (Mollusca: Aplacophora) with the description of a new genus, six new species, and a review of the family

Zootaxa ◽  
2021 ◽  
Vol 4933 (1) ◽  
pp. 63-97
Author(s):  
M. CARMEN COBO ◽  
KEVIN M. KOCOT
Keyword(s):  
New Species ◽  
Atlantic Ocean ◽  
Deep Sea ◽  
New Genus ◽  
South Atlantic ◽  
South Atlantic Ocean ◽  
Latitudinal Gradients ◽  
Internal Anatomy ◽  
The Family

So far, of the 292 known species of solenogasters (Mollusca, Aplacophora), 62 belong to the clade Pholidoskepia Salvini-Plawen, 1978. Of these, only two have an abyssal distribution (3500–6000 m depth). Among Pholidoskepia, Dondersiidae Simroth, 1893 is the most diverse family. This study contributes to the knowledge of this family with the description of one new genus and six new species from the abyssal South Atlantic Ocean: Dondersia ? foraminosa sp. n., Nematomenia divae sp. n., Nematomenia brasiliensis sp. n., Nematomenia ? guineana sp. n., Helluoherpia vieiralaneroi sp. n. and Inopinatamenia (gen. n.) calamitosa sp. n. Specimens were collected during DIVA (Latitudinal Gradients of Deep-Sea BioDIVersity in the Atlantic Ocean) expeditions in the Guinea (DIVA 2 Me 63/2, 2005) and Brazil (DIVA 3 Me 79/1, 2008) Basins. Specimens were characterized based primarily on the sclerites and internal anatomy, which was studied using histology. The importance of the radula and mantle sclerites for taxonomy is emphasized. Amended diagnoses for the family and some genera within this family are provided. This contribution increases the described diversity of Dondersiidae to ten genera and 38 species and highlights the need for more study of solenogasters in the deep sea. 

Portaratrum, a new genus of deep-sea Tanaidacea (Crustacea) with description of two new species

Zootaxa ◽  
2003 ◽  
Vol 282 (1) ◽  
pp. 1 ◽  
Author(s):  
JÜRGEN GUERRERO-KOMMRITZ
Keyword(s):  
New Species ◽  
Pacific Ocean ◽  
Atlantic Ocean ◽  
Deep Sea ◽  
New Genus ◽  
The Pacific ◽  
The Family ◽  
Two New Species ◽  
The Pacific Ocean

A new genus, Portaratrum n. gen. and two new species, one from the Atlantic Ocean and one from the Pacific Ocean are described. The new genus is characterized by a downwardly directed pleonal spur, cheliped basis fused to the cephalothorax, biramous uropods, pars molaris blunt with several terminal spinules. At present the genus is assigned to the family Colletteidae. Both species were collected from depths exceeding 4000 m.

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