Faculty Opinions recommendation of Novel chemoautotrophic endosymbiosis between a member of the Epsilonproteobacteria and the hydrothermal-vent gastropod Alviniconcha aff. hessleri (Gastropoda: Provannidae) from the Indian Ocean.

2005 ◽  
Author(s):  
David Newman
Keyword(s):  
Indian Ocean ◽  
Hydrothermal Vent ◽  
The Indian Ocean

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 Description of Barathricola thermophilus, a new species from a deep-sea hydrothermal vent field in the Indian Ocean with redescription of the Barathricola type species (Crustacea, Copepoda, Cyclopoida)

ZooKeys ◽  
2019 ◽  
Vol 865 ◽  
pp. 103-121 ◽  
Author(s):  
Viatcheslav N. Ivanenko ◽  
Jimin Lee ◽  
Cheon Young Chang ◽  
Il-Hoi Kim
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Deep Sea ◽  
Hydrothermal Vent ◽  
Type Species ◽  
Central Ridge ◽  
The Indian Ocean ◽  
Morphological Differences ◽  
Hydrothermal Vent Field ◽  
Copepoda Cyclopoida

Re-study of the type species of the genus Barathricola Humes, 1999 (Copepoda, Cyclopoida, Schminkepinellidae) described from the Pacific Ocean (Juan de Fuca Ridge), and study of the species Barathricolathermophilussp. nov. from a deep-sea hydrothermal vent field on the Central Ridge in the Indian Ocean revealed a derived feature and widespread geographic distribution of this deep-sea genus of cyclopoids. The derived feature of Barathricola is the sexually dimorphic third endopodal segment of leg 3 possessing a small outer terminal spine together with spine-like outgrowths on this segment. The new species differs from Barathricolarimensis Humes, 1999 in not expressing sexual dimorphism in leg 5, having three spines and one seta on its exopod in both sexes (B.rimensis has three spines and one seta on the female exopod but three spines and two setae on the male exopod) and in having broader caudal rami which are 8.9 times longer than wide in the female (this ratio for B.rimensis is 11). An amended diagnosis of the genus Barathricola, a key and a table of morphological differences for all species of Schminkepinellidae are given.

scholarly journals The mitochondrial genome of hydrothermal vent barnacle Eochionelasmus coreana (Cirripedia: Thoracica) from the Indian Ocean

2021 ◽  
Vol 6 (3) ◽  
pp. 710-712
Author(s):  
Won-Kyung Lee ◽  
Benny K. K. Chan ◽  
Se-Jong Ju ◽  
Dongsung Kim ◽  
Se-Joo Kim
Keyword(s):  
Indian Ocean ◽  
Mitochondrial Genome ◽  
Hydrothermal Vent ◽  
The Indian Ocean

scholarly journals Phylogeography of hydrothermal vent stalked barnacles: a new species fills a gap in the Indian Ocean ‘dispersal corridor’ hypothesis

2018 ◽  
Vol 5 (4) ◽  
pp. 172408 ◽  
Author(s):  
Hiromi Kayama Watanabe ◽  
Chong Chen ◽  
Daniel P. Marie ◽  
Ken Takai ◽  
Katsunori Fujikura ◽  
...  
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Hydrothermal Vent ◽  
The South ◽  
Morphological Variations ◽  
East Indian ◽  
The Family ◽  
The Indian Ocean ◽  
Indian Ridge ◽  
Dispersal Corridor

Phylogeography of animals provides clues to processes governing their evolution and diversification. The Indian Ocean has been hypothesized as a ‘dispersal corridor’ connecting hydrothermal vent fauna of Atlantic and Pacific oceans. Stalked barnacles of the family Eolepadidae are common associates of deep-sea vents in Southern, Pacific and Indian oceans, and the family is an ideal group for testing this hypothesis. Here, we describe Neolepas marisindica sp. nov. from the Indian Ocean, distinguished from N. zevinae and N. rapanuii by having a tridentoid mandible in which the second tooth lacks small elongated teeth. Morphological variations suggest that environmental differences result in phenotypic plasticity in the capitulum and scales on the peduncle in eolepadids. We suggest that diagnostic characters in Eolepadidae should be based mainly on more reliable arthropodal characters and DNA barcoding, while the plate arrangement should be used carefully with their intraspecific variation in mind. We show morphologically that Neolepas specimens collected from the South West Indian Ridge, the South East Indian Ridge and the Central Indian Ridge belong to the new species. Molecular phylogeny and fossil evidence indicated that Neolepas migrated from the southern Pacific to the Indian Ocean through the Southern Ocean, providing key evidence against the ‘dispersal corridor’ hypothesis. Exploration of the South East Indian Ridge is urgently required to understand vent biogeography in the Indian Ocean.

scholarly journals Unique Characteristics of the Exoskeleton of Bythograeid Crab, Austinograea rodriguezensis in the Indian Ocean Hydrothermal Vent (Onnuri Vent Field)

2019 ◽  
Vol 60 (1) ◽  
pp. 24-32
Author(s):  
Boongho Cho ◽  
Dongsung Kim ◽  
Hyeonmi Bae ◽  
Taewon Kim
Keyword(s):  
Indian Ocean ◽  
Deep Sea ◽  
Hydrothermal Vent ◽  
Hydrothermal Vents ◽  
Mechanical Analysis ◽  
X Ray ◽  
Sea Bed ◽  
The Indian Ocean ◽  
Constituent Elements ◽  
First Time

Abstract The Indian Ocean hydrothermal vent is a region where a new oceanic crust is formed by magma at the interface of the deep-sea bed over 2000 m in depth. Here we examined for the first time the exoskeleton structure and mechanical properties of the bythograeid crab Austinograea Rodriguezensis living in hydrothermal vents. Scanning electron microscope and energy dispersive x-ray were used for structural analysis, and a nanoindentation system was used for mechanical analysis. The exoskeleton was divided into four layers: epicuticle, exocuticle, endocuticle, and membrane. The thickness of each layer was different from that of other crustaceans previously reported. Additionally, the number of constituent elements, composition ratio, and hardness of each layer were unique among previously studied crabs. This observation indicates that those characteristics might have evolved for creatures with a hard exoskeleton living in the deep-sea hydrothermal vent.

Copepoda (Siphonostomatoida: Dirivultidae) from Hydrothermal Vent Fields on the Central Indian Ridge, Indian Ocean

Zootaxa ◽  
2020 ◽  
Vol 4759 (3) ◽  
pp. 301-337 ◽  
Author(s):  
JIMIN LEE ◽  
DONGSUNG KIM ◽  
IL-HOI KIM
Keyword(s):  
Indian Ocean ◽  
Deep Water ◽  
Hydrothermal Vent ◽  
First Record ◽  
The Other ◽  
Central Indian Ridge ◽  
East Pacific ◽  
The Family ◽  
The Indian Ocean ◽  
Indian Ridge

Eight species of copepods belonging to the family Dirivultidae (Siphonostomatoida) are described from deep-water hydrothermal vent fields on the Central Indian Ridge in the Indian Ocean. Aphotopontius limatulus Humes, 1987, previously known only from the East Pacific, is included. The other seven species are new, as follows: Aphotopontius kiost n. sp., A. muricatus n. sp., Benthoxynus constrictus n. sp., Stygiopontius spinifer n. sp., S. horridus n. sp., S. geminus n. sp., and S. quadripaxillifer n. sp. The copepodid I stage of S. horridus n. sp. is also described. This is the first record on copepods living on hydrothermal vent fields in the Indian Ocean. 

scholarly journals Bacilohydrin A, a New Cytotoxic Cyclic Lipopeptide of Surfactins Class Produced by Bacillus sp. SY27F from the Indian Ocean Hydrothermal Vent

2019 ◽  
Vol 14 (1) ◽  
pp. 1934578X1901400 ◽  
Author(s):  
Hong Zhou ◽  
Yu He ◽  
Yongqi Tian ◽  
Bailin Cong ◽  
Huanghao Yang
Keyword(s):  
Mass Spectrometry ◽  
Indian Ocean ◽  
Absolute Configuration ◽  
Hydrothermal Vent ◽  
Secondary Ion Mass Spectrometry ◽  
2D Nmr ◽  
Bacillus Sp ◽  
2D Nmr Spectroscopy ◽  
Cyclic Lipopeptide ◽  
The Indian Ocean

Bacilohydrin A, a new cyclic lipopeptide composed of seven mixed D/L-amino acids (L-Ile1—L-Leu2—D-Asp3—L-Val4—L-Leu5—L-Leu6—L-Gln7) and a ( R)-3-hydroxy-12-methyltetradecanoic acid (HMT) residue, was isolated from the crude culture extract of Bacillus sp. SY27F, which was obtained from the Indian Ocean hydrothermal vent. Its planar structure was elucidated by spectroscopic analyses, including 1D and 2D NMR spectroscopy, mass spectrometry (MS), and secondary ion mass spectrometry (MS/MS), whereas its absolute configuration was determined by modified Marfey's analysis. Bacilohydrin A displayed significant cytotoxicities against DU-145, MCF-7 and HepG2 cancer cell lines with IC50 values of 50.3-175.1 nM. Additionally, this is the first time to determine the absolute configuration of a D-aspartic acid residue in surfactin class.

scholarly journals First Hydrothermal Vent Communities from the Indian Ocean Discovered

2001 ◽  
Vol 18 (5) ◽  
pp. 717-721 ◽  
Author(s):  
Jun Hashimoto ◽  
Suguru Ohta ◽  
Toshitaka Gamo ◽  
Hitoshi Chiba ◽  
Toshiyuki Yamaguchi ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Hydrothermal Vent ◽  
The Indian Ocean
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