Aphotopontius acanthinus, New Species (Copepoda: Siphonostomatoida), from Deep-Sea Hydrothermal Vents on the East Pacific Rise

1994 ◽  
Vol 14 (2) ◽  
pp. 337 ◽  
Author(s):  
Arthur G. Humes ◽  
Richard A. Lutz
Keyword(s):  
New Species ◽  
Deep Sea ◽  
Hydrothermal Vents ◽  
East Pacific Rise ◽  
East Pacific

A new species of deep-sea Tegastidae (Crustacea: Copepoda: Harpacticoida)from 9°50´N on the East Pacific Rise, with remarks on its ecology

Zootaxa ◽  
2008 ◽  
Vol 1866 (1) ◽  
pp. 323 ◽  
Author(s):  
SABINE GOLLNER ◽  
VIATCHESLAV N. IVANENKO ◽  
PEDRO MARTINEZ ARBIZU
Keyword(s):  
New Species ◽  
Deep Sea ◽  
Hydrothermal Vents ◽  
Elevated Temperatures ◽  
East Pacific Rise ◽  
Artificial Substrates ◽  
Male And Female ◽  
East Pacific ◽  
The Family ◽  
A New Species

Both male and female of the new deep-sea species Smacigastes barti sp. nov. (Tegastidae, Sars) are described in detail. Copepoda is one of the most diversified taxa at deep-sea hydrothermal vents, but only one species of the family Tegastidae has been described from this habitat and other deep-sea environments. Smacigastes barti is the second species of the genus Smacigastes Ivanenko & Defaye, 2004, and was found in artificial substrates deployed in the vicinity of and 0.5 m from tubeworm aggregations at the 9°50´N region on the East Pacific Rise at 2500 meters depth. The derived character states of the new species are the lack of coxal endites on the maxilla, and 2-segmented exopods of swimming legs 2 and 3, the latter being the result of the fusion of the 2 proximal segments. An identification key to all known genera of Tegastidae is provided. Interestingly, the distribution of S. barti showed that it does not tolerate elevated temperatures and/or the presence of hydrogen sulfide or oxygen fluctuations, although both species of this genus were found in deepsea chemosynthetic environments.

Records of species of the hippolytid genus Lebbeus White, 1847 (Crustacea: Decapoda: Caridea) from hydrothermal vents in the Pacific Ocean, with descriptions of three new species

Zootaxa ◽  
2012 ◽  
Vol 3241 (1) ◽  
pp. 35 ◽  
Author(s):  
TOMOYUKI KOMAI ◽  
SHINJI TSUCHIDA ◽  
MICHEL SEGONZAC
Keyword(s):  
New Species ◽  
Pacific Ocean ◽  
Hydrothermal Vents ◽  
Okinawa Trough ◽  
East Pacific Rise ◽  
East Pacific ◽  
The Okinawa Trough ◽  
The Pacific ◽  
The Pacific Ocean ◽  
Three New Species

Five species of the hippolytid shrimp genus Lebbeus White, 1847 are reported from various deep-water hydrothermal ventsites in the Pacific Ocean: L. laurentae Wicksten, 2010 from the East Pacific Rise 13°N; L. wera Ahyong, 2009 from theBrothers Seamount, Kermadec Ridge, New Zealand; L. pacmanus sp. nov. from the Manus Basin, Bismarck Sea; L.shinkaiae sp. nov. from the Okinawa Trough, Japan; and L. thermophilus sp. nov. from the Manus and Lau basins, south-western Pacific. Lebbeus laurentae is fully redescribed because the original and subsequent descriptions are not totallydetailed. Differentiating characters among the three new species and close allies are discussed. Previous records of Lebbeus species from hydrothermal vents are reviewed.

New species of holothurian (Echinodermata: Holothuroidea) from hydrothermal vent habitats

2000 ◽  
Vol 80 (2) ◽  
pp. 321-328 ◽  
Author(s):  
A.V. Smirnov ◽  
A.V. Gebruk ◽  
S.V. Galkin ◽  
T. Shank
Keyword(s):  
New Species ◽  
Hydrothermal Vent ◽  
Hydrothermal Vents ◽  
East Pacific Rise ◽  
The West ◽  
West Pacific ◽  
East Pacific ◽  
The Family ◽  
Hydrothermal Environment ◽  
Deposit Feeding

A new holothurian species Chiridota hydrothermica (Apodida: Chiridotidae) is described, restricted to hydrothermal vent habitats. The new species is known from the west Pacific (Manus and North Fiji Basins) and the South East Pacific Rise, between 17 and 21°S. The unusual large, lobe-like tentacles of this holothurian, uncommon in the family Chiridotidae, could be an adaptation to facilitate shifts between suspension- and deposit-feeding in the hydrothermal environment. A brief review of all known records of holothurians and other echinoderms at hydrothermal vents is given.

scholarly journals Evidence for the presence of thermophilic Fe(III)-reducing microorganisms in deep-sea hydrothermal vents at 13°N (East Pacific Rise)

2001 ◽  
Vol 36 (2-3) ◽  
pp. 235-243 ◽  
Author(s):  
Alexander Slobodkin ◽  
Barbara Campbell ◽  
S.Craig Cary ◽  
Elizaveta Bonch-Osmolovskaya ◽  
Christian Jeanthon
Keyword(s):  
Deep Sea ◽  
Hydrothermal Vents ◽  
East Pacific Rise ◽  
East Pacific

A new species ofExrima,synonymy of four species ofAphotopontius, StygiopontiusandRhogobius, and record of first copepodid stage of Dirivultidae (Copepoda: Siphonostomatoida) from deep-sea hydrothermal vents of the East Pacific Rise (13°N)

2011 ◽  
Vol 91 (7) ◽  
pp. 1547-1559 ◽  
Author(s):  
Viatcheslav N. Ivanenko ◽  
Danielle Defaye ◽  
Michel Segonzac ◽  
Alexis Khripounoff ◽  
Jozée Sarrazin ◽  
...  
Keyword(s):  
New Species ◽  
Hydrothermal Vents ◽  
East Pacific Rise ◽  
Posterior Part ◽  
First Record ◽  
Sediment Traps ◽  
Additional Material ◽  
East Pacific ◽  
The Pacific ◽  
Ocean Study

Females of the new speciesExrima walterisp. nov. were found in sediment trap samples deployed over different sites of the East Pacific Rise (13°N) at 2600 m depth. Four traps were deposited during the HOPE99 cruise (1999) and recovered during the AMISTAD (1999) cruise on the research vessel ‘L'Atalante’. The new species is distinguished from congeners,E. singulaHumes, 1987 andE. dolichopusHumes, 1987, by the following derived characters: first somite of the urosome with 3 (one dorsal and two lateral) stout conical extensions; distal endopodal segment on the swimming leg 4 broad. In addition, many specimens of copepodids I and lecithotrophic nauplii, identified as belonging to Dirivultidae gen. sp., were found in the samples of all sediment traps. This is the first record of copepodids I and of a nauplius of dirivultids from the Pacific Ocean. Study of type and additional material collected during different Ifremer cruises at different vent sites (HERO91, EXOMAR, PHARE and MoMARETO) required synonymy of four species ofAphotopontiusHumes, 1987,StygiopontiusHumes, 1987 andRhogobiusHumes, 1987.Aphotopontius rapunculusHumes and Segonzac, 1998 is transferred to the genusRhogobiusbecause it possesses all presumed derived attributes of this genus: last abdominal somite with lobes at sides of anal operculum; second segment of antennal endopod elongate and slender. A new study of the type material suggests that:Aphotopontius temperatusHumes, 1997 is a synonym ofA. atlanteusHumes, 1996;Stygiopontius lumigerHumes, 1989 is a synonym ofS. sentiferHumes, 1987 whileS. bulbisetigerHumes, 1996 is a synonym ofS. pectinatusHumes, 1987. Females of the three synonymized species were found to be sub-adult females at copepodid V. Leg 6 on these specimens is one seta located dorsolaterally on the posterior part of the genital somite. This position for leg 6 is unknown for copepodid V of other siphonostomatoids whose leg 6 is located ventrally at copepodid V; the dorsolateral position is presumed derived and shared by the dirivultid generaAphotopontiusHumes, 1987 andStygiopontiusHumes, 1987. A new key to the Dirivultidae genera is presented.

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