scholarly journals Description of Seba longimera sp. nov. from hydrothermal vents in the Okinawa Trough, Northwest Pacific (Amphipoda, Amphilochoidea, Sebidae)

ZooKeys ◽  
2019 ◽  
Vol 899 ◽  
pp. 141-149
Author(s):  
Yanrong Wang ◽  
Chaodong Zhu ◽  
Zhongli Sha ◽  
Xianqiu Ren
Keyword(s):  
New Species ◽  
Hydrothermal Vents ◽  
Okinawa Trough ◽  
Northwest Pacific ◽  
Distal Margin ◽  
Posterior Lobe ◽  
The Okinawa Trough ◽  
The Family

Seba longimerasp. nov., of the family Sebidae Walker, 1908, is described from hydrothermal vents in Okinawa Trough. Other two congenic species, S. bathybia Larsen, 2007 and S. profundus Shaw, 1989, are also reported from these hydrothermal vents, but the new species can be readily distinguished from them in having the merus of pereopods 5 and 6 extending beyond distal margin of carpus, coxa 4 smaller than coxae 2 and 3, and coxa 5 with the posterior lobe larger than the anterior one, rather than equilobate.

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.

A new species of Parandania (Amphipoda, Stegocephalidae, Parandaniinae) from the Okinawa Trough

Crustaceana ◽  
2019 ◽  
Vol 92 (11-12) ◽  
pp. 1427-1434
Author(s):  
Yanrong Wang ◽  
Chaodong Zhu ◽  
Zhongli Sha ◽  
Xianqiu Ren
Keyword(s):  
New Species ◽  
Hydrothermal Vents ◽  
Okinawa Trough ◽  
The Okinawa Trough ◽  
Fourth Species ◽  
A New Species

Abstract A new species of Stegocephalidae, Parandania unicoxae sp. nov., is reported from hydrothermal vents in the Okinawa Trough. It is the fourth species described in the genus Parandania Stebbing, 1899. The new species is most similar to P. boecki (Stebbing, 1888), but it can be readily distinguished from P. boecki by the unilobate coxae 6-7.

scholarly journals A new species of the genus Smacigastes Ivanenko & Defaye, 2004 (Tegastidae, Harpacticoida, Copepoda) from the Onnuri Vent Field in the Indian Ocean

2020 ◽  
Vol 96 (2) ◽  
pp. 699-714
Author(s):  
Jong Guk Kim ◽  
Jimin Lee
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Hydrothermal Vent ◽  
Hydrothermal Vents ◽  
First Record ◽  
Cold Seeps ◽  
Dichotomous Key ◽  
The Family ◽  
The Indian Ocean ◽  
A New Species

The genus Smacigastes Ivanenko & Defaye, 2004 (Harpacticoida, Copepoda) is the most primitive genus in the family Tegastidae Sars, 1904, occurring in deep-sea chemosynthetic environments, such as hydrothermal vents, cold seeps, whale falls and wood falls. Our exploration of the Onnuri Vent Field, the sixth active hydrothermal vent system in the Central Indian Ridge, resulted in the discovery of a new species in the genus Smacigastes. A detailed morphological analysis of S. pumilasp. nov. reveals that it most resembles S. barti Gollner, Ivanenko & Martínez Arbizu, 2008, described from a hydrothermal vent in the East Pacific Ridge; the new species can be distinguished from the existing species by the 8-segmented female antennule, the absence of an abexopodal seta on the antennary basis, the mandibular exopod represented by a single seta and the exopod of the first leg with five setae. This is the first record of Smacigastes in the Indian Ocean. A dichotomous key to species of the genus Smacigastes worldwide is provided.

scholarly journals Population connectivity of the crab Gandalfus yunohana (Takeda, Hashimoto & Ohta, 2000) (Decapoda: Brachyura: Bythograeidae) from deep-sea hydrothermal vents in the northwestern Pacific

2020 ◽  
Vol 40 (5) ◽  
pp. 556-562
Author(s):  
Hiromi K Watanabe ◽  
Chong Chen ◽  
Shigeaki Kojima ◽  
Shogo Kato ◽  
Hiroyuki Yamamoto
Keyword(s):  
Deep Sea ◽  
Hydrothermal Vents ◽  
Okinawa Trough ◽  
Coi Gene ◽  
Genetic Connectivity ◽  
Reverse Direction ◽  
Northwestern Pacific ◽  
Brachyuran Crab ◽  
The Okinawa Trough ◽  
Mariana Arc

Abstract Genetic connectivity provides a basis for evaluating the resilience of animal communities by elucidating gene flow and serves as a proxy for realized dispersal through planktonic larval dispersal, settlement, and reproductive success. Gandalfus yunohana (Takeda, Hashimoto & Ohta, 2000) is a brachyuran crab endemic to deep-sea hydrothermal vents in the northwestern Pacific. Although an iconic and often dominant species, the connectivity among its populations is yet to be examined. We obtained barcoding sequences of the mitochondrial COI gene of G. yunohana from four vent fields including two on the Izu Arc, one on the northern Mariana Arc, and one in the Okinawa Trough. Genetic diversity of populations on the Izu and northern Mariana arcs were similar and shared the dominant haplotypes, showing no genetic subdivision regardless of the habitat depth. The Okinawa Trough population, for which only one specimen was available, was not genetically different from specimens from the Izu/Mariana arc populations. Estimation of the number of immigrants among populations suggests that the migration from north to south is higher than in the reverse direction. Our results resonate with previous laboratory-culture experiments, suggesting a high dispersal capability for G. yunohana. Visual observations and sampling, however, suggest that G. yunohana is exceedingly rare in the Okinawa Trough. This perhaps results from a lack of sufficient larval supply from the Izu-Bonin-Mariana Arc vents, and there may not be a reproductive population in the Okinawa Trough.

A new species of the genus Neoverruca (Cirripedia, Thoracica, Verrucidea, Neoverrucidae) from a hydrothermal vent area in the Okinawa Trough

Crustaceana ◽  
2015 ◽  
Vol 88 (9) ◽  
pp. 991-1001 ◽  
Author(s):  
Zhong-Li Sha ◽  
Xian-Qiu Ren
Keyword(s):  
New Species ◽  
Hydrothermal Vent ◽  
Distal Part ◽  
Okinawa Trough ◽  
Longitudinal Ridge ◽  
Longitudinal Groove ◽  
The Okinawa Trough ◽  
Inner Surface ◽  
A New Species

A new species of the neoverrucid barnacle genusNeoverrucaNewman, 1989,N. intermediasp. nov., collected from a hydrothermal vent area in the Okinawa Trough, is described and illustrated. It differs fromN. brachylepadoformisNewman, 1989 by the apical end of the inner surface of the movable scutum being in a pocket-form, with a longitudinal groove upwards, and without median ridges; the adductor ridge (or myophore) of the fixed scutum stout and the inner distal part of the scutum without longitudinal ridge.

Two new species of amphipods (Crustacea: Amphipoda: Photidae) from Korean waters with a redescription of Gammaropsis longipropodi

Zootaxa ◽  
2017 ◽  
Vol 4300 (3) ◽  
pp. 380 ◽  
Author(s):  
TAE WON JUNG ◽  
HYUN KI CHOI ◽  
MIN-SEOP KIM ◽  
SEONG MYEONG YOON
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Posterior Lobe ◽  
Characteristic Shape ◽  
Korean Waters ◽  
Cephalic Lobe ◽  
The Family ◽  
Two New Species ◽  
First Time

Three amphipods of the family Photidae collected from Korean waters are reported here with detailed descriptions and illustrations. The Korean materials of Gammaropsis examined in this study are readily assigned to G. longipropodi by the characteristic shape of gnathopod 2 in males: not slenderly produced posterior margin of the carpus, uniform width of very elongate propodus, and the transverse palm. Among the species of genus Photis, P. fischmanni is only one species bearing stridulation ridges of the basis on gnathopod 2 and coxa 3 simultaneously in females, until now. However, Photis stridulus sp. nov. also show this characteristic but is clearly distinguishable from P. fischmanni by the weak setation of the appendages, smaller eye on the anterior cephalic lobe, and the slender carpus and propodus on gnathopod 1. The genus Podoceropsis is recorded from Korean waters for the first time with the discovery of P. clavapes sp. nov. This new species is characterized by its elongate propodus and dactylus on gnathopod 2 and the shape of the posterior lobe of the basis on pereopod 5 in mature males. 

scholarly journals Draft Genome Sequence of Exiguobacterium sp. HVEsp1, a Thermophilic Bacterium Isolated from a Deep-Sea Hydrothermal Vent in the Okinawa Trough

2017 ◽  
Vol 5 (17) ◽  
Author(s):  
Chen Chen ◽  
Li Sun
Keyword(s):  
Genome Sequence ◽  
Deep Sea ◽  
Hydrothermal Vent ◽  
Hydrothermal Vents ◽  
Sequence Data ◽  
Okinawa Trough ◽  
Draft Genome ◽  
Thermophilic Bacterium ◽  
Draft Genome Sequence ◽  
The Okinawa Trough

ABSTRACT We report here the draft genome sequence of Exiguobacterium sp. HVEsp1, a thermophilic bacterium isolated from a deep-sea hydrothermal vent. The estimated genome size of this strain is 2,838,499 bp with a G+C content of 48.2%. The genome sequence data provide valuable information that will facilitate studies on the adaptation mechanisms of bacteria living in deep-sea hydrothermal vents.

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