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| Nesometra integra Pratama, Virgili, Reimer & Fujita, 2024 |
Abstract
A new species of the genus Nesometra Virgili, Poliseno, Fujita, Pratama, Fernández-Silva, and Reimer, 2023 is described based on the specimens collected from the Amami Islands and Ogasawara Islands, Japan and Cunningham Island, Australia. Nesometra integra n. sp. is distinguished from its single congener, N. sesokonis (Obuchi, Kogo, and Fujita, 2009), by having complete proximal pinnulation and cirri with reduced medial constriction on its distal part.
Keywords: Antedonidae, Nesometra, new species, Japan, Australia, coral reef
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| Nesometra integra n. sp., external morphology, holotype (A–D, F: NSMT E-14402), paratype (E: NSMT E-14405). A, Whole body, in seawater, oral view; B, schematic drawing of proximal ossicles and pinnulation, aboral view; C, close up of arm, aboral view; D, longer (left) and shorter (right) cirri, lateral view; E, first division series with first two brachials of two arms, aboral view; F, pinnules, lateral view. Abbreviations: br1–br12, first to twelfth brachials of arm; c1–c4, first to fourth cirrals; CD, centrodorsal; IBr, first division series; Ibr1, first brachial of first division series; Ibr2ax, second brachial (axillary) of first division series; P1–P5, first to fifth exterior pinnule; Pa–Pd, first to fourth interior pinnule; PD, distal pinnule; PM, middle pinnule; p1–p5, first to fifth pinnulars; R, radial; tc, terminal claw. Orientation: Pr, proximal; Di, distal. Scale bars: A, 5mm; C–F, 1mm. |
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| Living specimens of Nesometra integra n. sp. showing variation of coloration pattern. In situ photographs on the bottom of a coral rubble rock in Amami-Ohshima Island. A, Paratype (NSMT E-13603), solid coloration; B, paratype (NSMT E-13604), dotted coloration. |
Family Antedonidae Norman, 1865
Subfamily Antedoninae Norman, 1865
Genus Nesometra Virgili, Poliseno, Fujita, Pratama,
Fernández-Silva, and Reimer, 2023
[New Japanese name: Sesoko-hime-umishida-zoku]
Nesometra integra n. sp.
[New Japanese name: Kanzen-sesoko-hime-umishida]
(Figs 1, 3–7, 9A, B)
Distribution. Japan (Ogasawara Islands and Amami Islands) and Australia (Cunningham Island). Bathymetrical
range: 17.5–110m; 52–54m in the Ogasawara Islands, 17.5–
75m in the Amami Islands, 110m in Cunningham Island.
Etymology. The specific name, integra (Latin adjective,
feminine), means ‘complete’ after the adult complete proximal pinnulation of the new species compared to its congener, N. sesokonis.
The Japanese name of the genus Nesometra, Sesoko-himeumishida-zoku (セソコヒメウミシダ属) is derived from Sesoko
(瀬底), the type locality of the type species N. sesokonis, and
hime-umishida-zoku (ヒメウミシダ属), the Japanese name of
antedonid comatulids and the Japanese word for genus, zoku
(属). The Japanese name of the new species, Kanzen-sesokohime-umishida (カンゼンセソコヒメウミシダ), is derived
from kanzen (完全), means also ‘complete’ as a translation
of the specific name, integra.
Gregorius A. Pratama, Riccardo Virgili, James D. Reimer and Toshihiko Fujita. 2024. Nesometra integra, A New Species of Feather Star (Echinodermata: Crinoidea: Comatulida: Antedonidae) from Southern Japan and Western Australia. Species Diversity. 29(2); 255-268. DOI doi.org/10.12782/specdiv.29.255
https://www.jstage.jst.go.jp/article/specdiv/29/2/29_SD23-38/_article
Researchgate.net/publication/383342175_Nesometra_integra_a_New_Species_of_Crinoidea_Japan_and_Australia
