The ‘scaly-foot gastropod’: a new genus and species of hydrothermal vent-endemic gastropod (Neomphalina: Peltospiridae) from the Indian Ocean

AbstractThe new genus and species Ducatina umbilicata is described from Îles Crozet and Îles Kerguelen. This lichen is characterized by an umbilicate thallus with a black verrucose lower surface and a greyish to dark olivaceous smooth upper surface having large verrucae, large semi-immersed cephalodia, semi-immersed apothecia with a prominent thalline margin, simple, mainly ellipsoid ascospores of 23–42×12–25 µm and the presence of unknown chemical compounds. Phylogenetic analyses using nuLSU and mtSSU sequences place Ducatina in the Trapeliaceae (Baeomycetales). The new taxon is closely related to Orceolina antarctica and O. kerguelensis, two other lichens endemic to these subantarctic islands, differing by its morphology and the lack of chemical compounds. Ducatina is the only genus in the Trapeliaceae to develop a large umbilicate thallus.

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A new genus and species of fish parasitic cymothoid (Crustacea, Isopoda) from the Indian Ocean coast of South Africa, with a key to the externally attaching genera of Cymothoidae

ZooKeys ◽

10.3897/zookeys.889.38638 ◽

2019 ◽

Vol 889 ◽

pp. 1-15 ◽

Cited By ~ 2

Author(s):

Niel L. Bruce ◽

Rachel L. Welicky ◽

Kerry A. Hadfield ◽

Nico J. Smit

Keyword(s):

South Africa ◽

Indian Ocean ◽

Dorsal View ◽

Anterior Margin ◽

New Genus ◽

The Body ◽

Monotypic Genus ◽

New Genus And Species ◽

North Eastern ◽

The Indian Ocean

Bambalocra intwalagen. et sp. nov. is described from Sodwana Bay, north-eastern South Africa. The monotypic genus is characterised by the broadly truncate anterior margin of the head with a ventral rostrum, coxae 2–5 being ventral in position not forming part of the body outline and not or barely visible in dorsal view, and the posterolateral margins of pereonites 6 and 7 are posteriorly produced and broadly rounded. The antennulae bases are widely separated, with both antennula and antenna slender. The species is known only from the type locality and the known hosts are species of Pomacanthidae (Angelfish). A revised key to the externally attaching genera of Cymothoidae is provided.

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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.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.1027963.335839 ◽

2005 ◽

Author(s):

David Newman

Keyword(s):

Indian Ocean ◽

Hydrothermal Vent ◽

The Indian Ocean

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<i>Navilithus altivelum</i>: a remarkable new genus and species of deep photic coccolithophores

Journal of Micropalaeontology ◽

10.1144/jm.25.2.141 ◽

2006 ◽

Vol 25 (2) ◽

pp. 141-151 ◽

Cited By ~ 7

Author(s):

Jeremy R. Young ◽

Harald Andruleit

Keyword(s):

New Species ◽

Indian Ocean ◽

New Genus ◽

Molecular Genetic ◽

New Taxon ◽

New Genus And Species ◽

Significant Addition ◽

A New Species ◽

Genetic Results ◽

Basal Structure

Abstract. A very distinctive new deep-photic coccolithophore is described from the NE Indian Ocean. The new species is trimorphic with: 200–300 body coccoliths bearing low spines attached by narrow stems to a basal narrow-rimmed placolith structure; up to 18 circum-flagellar coccoliths with tall sail-like spines; and up to 22 coccoliths with moderately elevated spines occurring both around the circum-flagellar coccoliths and antapically. These features make the coccolithophore unique and require placement in a new species and genus. The basal structure, however, shows similarities to a recently recognized group of narrow-rimmed placoliths. Hence, the new coccolithophore provides some support for this grouping as a significant addition to our understanding of coccolithophore biodiversity, and potentially an explanation for a set of anomalous molecular genetic results. In addition the new taxon provides further evidence that the deep-photic coccolithophore community is more diverse than has been assumed.

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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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Copidothrips octarticulatus recorded from Tahiti, with first description of the male and larvae (Thysanoptera, Thripidae, Panchaetothripinae)

Zootaxa ◽

10.11646/zootaxa.4949.3.10 ◽

2021 ◽

Vol 4949 (3) ◽

pp. 591-594

Author(s):

ARTURO GOLDARAZENA ◽

BRUNO MICHEL ◽

FRED JACQ

Keyword(s):

Host Plants ◽

New Genus ◽

Host Record ◽

Pacific Island ◽

Northern Australia ◽

New Genus And Species ◽

Christmas Island ◽

The Indian Ocean ◽

Single Genus ◽

Unknown Male

Heliothrips (Parthenothrips) octarcticulatus was originally described by Schmutz (1913) from Sri Lanka. Subsequently, Hood (1954) described from Taiwan a new genus and species Copidothrips formosus, and then Stannard and Mitri (1962) described a further new genus and species, Mesostenothrips kraussi, from Kiribati and Gibert Islands. Bhatti (1967, 1990), recognized that only a single genus and species was involved amongst these names, established the resultant synonymies, and recorded the species octarcticulatus from various localities between the Seychelles and five different Pacific Island groups. It has also been recorded from Northern Australia, and Thailand (ThripsWiki 2021) as well as Christmas Island in the Indian Ocean (Mound 2019). Despite these records, there is little reliable information about host plants and biology apart from Piper myristicum on Pohnpei island (Micronesia), and also damage caused to the leaves of Aglaonema and Spathoglottis at Darwin in Australia (Mound & Tree 2020). In this note, we add a further interesting host record and describe the previously unknown male as well as the larvae of this species.

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Pseudoisotachis Pocsii Váňa, A New Genus and Species of Liverwort from the Subantarctic Marion Island

Polish Botanical Journal ◽

10.2478/pbj-2013-0006 ◽

2013 ◽

Vol 58 (1) ◽

pp. 55-58 ◽

Cited By ~ 4

Author(s):

Jiří Váňa

Keyword(s):

New Species ◽

Indian Ocean ◽

New Genus ◽

Southern Indian Ocean ◽

Marion Island ◽

New Genus And Species ◽

Prince Edward Islands

AbstractA new genus and new species of liverwort, Pseudoisotachis Váňa and Pseudoisotachis pocsii Váňa, is described from Marion Island, part of the Prince Edward Islands, a subantarctic archipelago situated in the Kerguelen Province of the southern Indian Ocean. Family placement of the new genus and species is uncertain due to absence of androecia, gynoecia and sporophytes; morphologically it is compared with some genera of Isotachidaceae and with the genus Orthocaulis of Anastrophyllaceae. The new species is described and illustrated.

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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 ◽

10.3897/zookeys.865.35827 ◽

2019 ◽

Vol 865 ◽

pp. 103-121 ◽

Cited By ~ 2

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.

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