First columbellid species (Gastropoda: Buccinoidea) from deep-sea hydrothermal vents, discovered in Okinawa Trough, Japan

The molluscan diversity of deep-sea chemosynthetic ecosystems in Japan has been in general well documented with about 80 described species, of which over half are gastropods (Sasaki et al. 2005; Fujikura et al. 2012; Sasaki et al. 2016). Recently, however, a number of novel hydrothermal vent sites were discovered in the area using multibeam echo-sounding (Nakamura et al. 2015), providing opportunities for new discoveries. As a part of ongoing studies documenting the biodiversity of such sites, we present the first record of Columbellidae from hydrothermal vents, with a new species recovered from Natsu and Aki sites, in the Iheya North hydrothermal field (for map and background on the vent field see Nakamura et al. 2015).

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First record and a new species of Sericosura Fry & Hedgpeth, 1969 (Arthropoda: Pycnogonida: Ammotheidae) from a hydrothermal vent of Southwestern Indian Ridge

Zootaxa ◽

10.11646/zootaxa.4420.1.8 ◽

2018 ◽

Vol 4420 (1) ◽

pp. 131

Author(s):

JIANJIA WANG ◽

DINGYONG HUANG ◽

XIAOFENG SHI ◽

RONGCHENG LIN ◽

WENTAO NIU

Keyword(s):

New Species ◽

Hydrothermal Vent ◽

Hydrothermal Vents ◽

First Record ◽

Hydrothermal Field ◽

Male Specimen ◽

Evolutionary Studies ◽

Indian Ridge ◽

A New Species ◽

Southern Oceans

This is the first record of the genus Sericosura from the “Duanqiao” hydrothermal field on the Southwestern Indian Ridge. Collected material included two juvenile specimens temporarily assigned to S. bamberi and S. heteroscela respectively, and one male specimen with dimorphic legs here proposed as a new species, S. duanqiaoensis sp. nov. The discovery suggests potential connectivity among the hydrothermal vents of the Atlantic, Indian and Southern Oceans, expecting obtaining more specimens for further evolutionary studies to clarify the relationships of these hydrothermal vents.

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Mesonerilla neridae sp. nov. (Nerillidae): First meiofaunal annelid from deep-sea hydrothermal vents

Zoosymposia ◽

10.11646/zoosymposia.2.1.20 ◽

2009 ◽

Vol 2 (1) ◽

pp. 297-303 ◽

Cited By ~ 3

Author(s):

KATRINE WORSAAE ◽

GREG W. ROUSE

Keyword(s):

New Species ◽

Deep Sea ◽

Hydrothermal Vent ◽

Hydrothermal Vents ◽

Volcanic Glass ◽

First Record ◽

New Material ◽

Broad Variety ◽

Active Venting ◽

A New Species

Though most common in coastal sandy bottoms, nerillid annelids have been found in a broad variety of habitats around the world and two genera have previously been reported from the deep sea. During a cruise to the southern East Pacific Rise and northern Pacific Antarctic Ridge (near Easter Island) in 2005, six specimens of a new species of Mesonerilla were collected at depths of 2234–2649 m. Samples were taken via DSV Alvin with a slurp gun collecting fine silt and volcanic glass shards in cracks, fissures, and mussel beds from 5–20 m away from active venting areas. As well as being the first deep-sea hydrothermal vent associated nerillid, this is the first record of an adult meiofaunal annelid from deep-sea hydrothermal vent areas and the first record of Mesonerilla from the deep sea. Based on the new material we here describe a new species of Mesonerilla, M. neridae sp. nov., with nine chaetigerous segments, three antennae, long chaetae, and almost no ciliation. It resembles the subtidal, interstitial M. roscovita in the shared presence of a short median antenna and M. fagei and M. lüderitzi by presence of chaetae in segment one and relatively short parapodial cirri.

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

Zoosystematics and Evolution ◽

10.3897/zse.96.54507 ◽

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.

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A new squat lobster species of the genus Munida Leach, 1820 (Crustacea: Anomura: Galatheoidea: Munididae) from hydrothermal vents on the Eastern Pacific Rise

Zootaxa ◽

10.11646/zootaxa.4743.1.12 ◽

2020 ◽

Vol 4743 (1) ◽

pp. 131-136 ◽

Cited By ~ 1

Author(s):

XINMING LIU ◽

XINZHENG LI ◽

RONGCHENG LIN

Keyword(s):

New Species ◽

Deep Sea ◽

Hydrothermal Vent ◽

Hydrothermal Vents ◽

Eastern Pacific ◽

Single Specimen ◽

Squat Lobster ◽

The Third ◽

A New Species

A new species of the genus Munida Leach, 1820, is described and illustrated based on a single specimen from the deep-sea hydrothermal vent on the Eastern Pacific Rise. Munida alba sp. nov. closely resembles M. ampliantennulata Komai, 2011, M. watatsumin Komai, 2014. and M. magniantennulata, but differences in the morphologies of the third maxilliped, pollex of the cheliped and the third segment of the antennal peduncle readily distinguish the new species from the three relatives. The new species is the fourth of the genus occurring at the hydrothermal vent areas.

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A new species and record of Serpulidae (Annelida: Polychaeta) from Cross Seamount in the Hawaiian Chain

Zootaxa ◽

10.11646/zootaxa.3192.1.4 ◽

2012 ◽

Vol 3192 (1) ◽

pp. 49

Author(s):

JULIE H. BAILEY-BROCK ◽

WAGNER F. MAGALHÃES

Keyword(s):

New Species ◽

Deep Sea ◽

New Record ◽

Type Species ◽

Hawaiian Islands ◽

Type Specimen ◽

First Record ◽

Type Locality ◽

A New Species

A new species of the serpulid genus Metavermilia Bush, 1905 and a new record of the genus Omphalopomopsis Saint-Joseph, 1894 are described from deep-sea lava rocks collected from 2,013 m at Cross Seamount, southwest of the Hawaiiarchipelago. Metavermilia zibrowii sp. nov., differs from its congeners mostly by the presence of a simple and concaveoperculum, extent of the thoracic membrane and tube morphology. Omphalopomopsis langerhansii (Marenzeller, 1885)is the type species of the genus and it is only known through its type specimen. This species is characterized by a simpleoperculum with a shallow convex calcareous endplate, cylindrical peduncle, presence of Apomatus chaetae and high num-ber of teeth in the thoracic uncini. This is the first record of this species outside the type locality and both genera are newly recorded for the Hawaiian Islands.

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A new species and phylogenetic insights in Hesiospina (Annelida, Hesionidae)

Zootaxa ◽

10.11646/zootaxa.4441.1.3 ◽

2018 ◽

Vol 4441 (1) ◽

pp. 59 ◽

Cited By ~ 3

Author(s):

PAULO BONIFÁCIO ◽

YANN LELIÈVRE ◽

EMMANUELLE OMNES

Keyword(s):

New Species ◽

Deep Sea ◽

Hydrothermal Vents ◽

Juan De Fuca Ridge ◽

Cold Seeps ◽

Molecular Analyses ◽

The Third ◽

Juan De Fuca ◽

Ne Pacific ◽

A New Species

Hesionids are a very speciose group of polychaetes. In the deep sea, they occur in different environments such as hydrothermal vents, cold seeps, abyssal depths or whale falls. In the present study, a new species of Hesionidae, Hesiospina legendrei sp. nov. has been identified based on morphological and molecular (16S and COI genes) data from hydrothermal vents located in Juan de Fuca Ridge (NE Pacific Ocean). This new species is characterized by trapezoid prostomium; proboscis with high number of distal papillae (20–27), a pair of sac-like structures inserted ventro-laterally in proboscis; notopodia lobe reduced with multiple, slender aciculae on segments 1–5; and neuropodia developed with single, simple chaeta, and numerous, heterogomph falcigers, with 1–2 inferiormost having elongated hood. Hesiospina legendrei sp. nov. is the third described species in the genus. Sequences from the two previously described Hesiospina species are included in the molecular analyses, and although the genes used in this study are not sufficient to resolve the relationships on genus level, the result raises questions about the cosmopolitan aspect of H. vestimentifera.

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Levensteiniella manusensis sp. nov., a new polychaete species (Annelida: Polynoidae) from deep-sea hydrothermal vents in the Manus Back-Arc Basin, Western Pacific

Zootaxa ◽

10.11646/zootaxa.4388.1.7 ◽

2018 ◽

Vol 4388 (1) ◽

pp. 102 ◽

Cited By ~ 1

Author(s):

XUWEN WU ◽

KUIDONG XU

Keyword(s):

New Species ◽

Deep Sea ◽

Hydrothermal Vents ◽

Western Pacific ◽

Posterior Border ◽

Polychaete Species ◽

Males And Females ◽

Back Arc ◽

A New Species

A new species belonging to the subfamily Macellicephalinae (Annelida: Polynoidae), Levensteiniella manusensis sp. nov., is described based on material collected from deep-sea hydrothermal vents in the Manus Back-Arc Basin. The new species is readily distinguished from the congeners by having two pairs of ventral papillae on segments 11 and 12, the first pair of which is distally dichotomous. Levensteiniella manusensis is also characterized by the combination of the notochaetae which are smooth or serrated on the curved side, and the elytra with micro- and macropapillae on the surface and thickened bulbous projections on the posterior border. Based on morphological comparisons of the main features, we provide two keys to six species of Levensteiniella described to date based on males and females respectively.

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

Crustaceana ◽

10.1163/15685403-00003462 ◽

2015 ◽

Vol 88 (9) ◽

pp. 991-1001 ◽

Cited By ~ 2

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.

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

Genome Announcements ◽

10.1128/genomea.00253-17 ◽

2017 ◽

Vol 5 (17) ◽

Cited By ~ 1

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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