A taxonomic review of the genus <i>Astrodia</i> (Echinodermata: Ophiuroidea: Asteronychidae)

Okanishi, Masanori; Fujita, Toshihiko

doi:10.1017/s0025315413001331

Cited by 7 publications

(23 citation statements)

References 17 publications

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“…Furthermore, the octocoral species were identified according to the colony morphology and characteristics of the polyp scales, following the works made by Bayer (1982), Cairns and Bayer (2002), Bayer et al (2014), andCairns (2018a). The brittle stars were then identified based on their external morphological characteristics following the taxonomic information presented by the studies of Fell (1960), Fujita (2014), andO'Hara et al (2017). The external characteristics of Astrodia include dorsal disc with thickened skin with few or no scales, bar-like radial shields that almost meet in the disc center, long and tapering arms that are covered by thickened skin, lacking dorsal plates, and never hooked arm spines (After Okanishi and Fujita, 2014;O'Hara et al, 2017;Okanishi et al, 2017).…”

Section: Methodsmentioning

confidence: 99%

“…Records of the ophiuroid genus Astrodia in the Pacific Ocean have also been presented in studies by Sellanes et al (2008) and Okanishi and Fujita (2014). Nevertheless, the study by Sellanes et al (2008) recorded Astrodia tenuispina (Verrill, 1884), which is an Atlantic species according to a study by Okanishi and Fujita (2014).…”

Section: Introductionmentioning

confidence: 99%

“…However, the brittle stars were still not identified even if they were usually mentioned (Quattrini et al, 2013;Bayer et al, 2014;Cairns, 2018b;Cordeiro et al, 2018). Records of the ophiuroid genus Astrodia in the Pacific Ocean have also been presented in studies by Sellanes et al (2008) and Okanishi and Fujita (2014). Nevertheless, the study by Sellanes et al (2008) recorded Astrodia tenuispina (Verrill, 1884), which is an Atlantic species according to a study by Okanishi and Fujita (2014).…”

Section: Introductionmentioning

confidence: 99%

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Callogorgia spp. and Their Brittle Stars: Recording Unknown Relationships in the Pacific Ocean and the Caribbean Sea

2021

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The habitat formed by the Callogorgia species, with their abundance and colony sizes, provides an important refuge for a variety of brittle stars which are recognized as the epibionts of octocorals in both shallow and deep environments. In such a relationship, ophiurans benefit directly from being elevated because they facilitate their feeding by suspension, while octocorals do not seem to benefit or be harmed. During three different expeditions developed in the Colombian Pacific from 2012 to 2013 and in the Caribbean Sea during 1998 and 2012 by the INVEMAR - Marine and Coastal Research institute, different samplings were carried out on soft bottoms through trawls with an epibenthic net. For the Pacific Ocean, 33 fragments of the octocoral Callogorgia cf. galapagensis Cairns, 2018 with 178 specimens of the ophiuroid Astrodia cf. excavata (Lütken and Mortensen, 1899) were found in two stations at depths 530 and 668 m. Considering the abundance of A. cf excavata, other biological characters such as size, presence of mature gonads, and evidence of arm regeneration were also detailed. In contrast, in the Caribbean Sea, Callogorgia gracilis (Milne Edwards and Haime, 1857) was found with ophiuroids belonging to the genera Asteroschema and Ophiomitra. The octocoral Callogorgia americana (Cairns and Bayer, 2002) was also found, but without associated brittle stars. These findings constituted the first specific association reported in the Eastern Tropical Pacific, and new relationships for the Caribbean Sea. This further reflected a possible specific association between the Callogorgia and Astrodia species that needed to be further explored. Thus, the Callogorgia species and the brittle star A. cf. excavata represented new records for the Colombian Pacific Ocean and the southern Caribbean Sea.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Callogorgia spp. and Their Brittle Stars: Recording Unknown Relationships in the Pacific Ocean and the Caribbean Sea

2021

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“…Occurrence: cosmopolitan, in the Pacific and Atlantic Oceans; in the Atlantic, from off Nantucket Island to Brazil including the Caribbean and Gulf of Mexico deep waters, eastwards from Rockall Trough south to the Iberian Peninsula, including the Canary Islands and the Azores (Sibuet 1972; Okanishi & Fujita 2014).…”

Section: List Of Speciesmentioning

confidence: 99%

Untitled

2019

Zootaxa

1,524

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In more than 150 years of research in the waters surrounding the Azores, several publications on the fauna of echinoderms of the archipelago have been produced, in the form of papers, notes, reports, reviews, and monographs. This work attempts to summarize the present knowledge on this marine group in the Azorean exclusive economic zone (i.e., waters within 200 nautical miles of the archipelago’s shores). A short review of the history of the species’ taxonomy is given, with key references, geographical distribution, ecology, additional notes and, when possible, figures. We herein report 172 species of echinoderms (6 crinoids, 55 ophiuroids, 45 asteroids, 36 holothurians, and 30 echinoids) from the Azores Archipelago, most of them inhabiting deep waters (>200 m). Only 29 shallow-water species were recorded locally (≤50 m depth). In general, the echinoderm species present in the Azores are characterized by a wide geographical distribution in the Atlantic Ocean. Only nine taxa (all deep-water species, >840 m) appear to be restricted to the Azorean waters. Overall, the knowledge of the echinoderm fauna of the Azores is out-dated, with many species last collected in the archipelago over 100 years ago. A recent interest in the Azorean Mid-Atlantic waters has brought oceanographic cruises back to the archipelago, thus providing new opportunities for the renewal of 150 years of echinoderm studies in the area.

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“…A new species of Asterostegus is based on five specimens collected from off Madagascar. In recent descriptions of ophiuroids, photographs and/or drawings of each part of the body, as well as SEM images of each ossicle, provide valuable taxonomic information (e.g., Okanishi & Fujita 2009;Okanishi & Fujita 2011a, 2011bOkanishi & Fujita 2014;Martynov 2010). To date, drawings and photographs of A. tuberculatus and A. maini have been presented of limited parts of the body (Mortensen 1933b;McKnight 2003) only.…”

mentioning

confidence: 99%

A taxonomic review of the genus Asterostegus (Echinodermata: Ophiuroidea), with the description of a new species

Okanishi¹,

Fujita²

2014

EJT

Self Cite

469

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Abstract.A revision of the genus Asterostegus Mortensen, 1933 (Echinodermata: Ophiuroidea: Euryalidae) is based on seven specimens, including the holotype of Asterostegus maini McKnight, 2003. A new species, Asterostegus sabineae sp. nov., is described from off Reunion Island and two other species, A. tuberculatus Mortensen, 1933 and A. maini, are redescribed. A tabular key to the three species of the genus Asterostegus is provided. Some terminology of the taxonomy of euryalid ophiuroids is revised.

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A taxonomic review of the genus Astrodia (Echinodermata: Ophiuroidea: Asteronychidae)

Cited by 7 publications

References 17 publications

Callogorgia spp. and Their Brittle Stars: Recording Unknown Relationships in the Pacific Ocean and the Caribbean Sea

Callogorgia spp. and Their Brittle Stars: Recording Unknown Relationships in the Pacific Ocean and the Caribbean Sea

Untitled

A taxonomic review of the genus Asterostegus (Echinodermata: Ophiuroidea), with the description of a new species

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