Ophiosemnotes conferta

• Main Authors: O'Hara, Timothy D., Thuy, Ben
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2022
• Subjects: Biodiversity; Taxonomy; Animalia; Echinodermata; Ophiuroidea; Ophiacanthida; Ophiacanthidae; Ophiosemnotes; Ophiosemnotes conferta; Antarctic; Southern Ocean; Kerguelen; Pacific; New Zealand; Antarc*
• Online Access: https://doi.org/10.5281/zenodo.6411804; http://treatment.plazi.org/id/C72D87A1534DFF83FEA38491FB10F80D

Ophiosemnotes conferta (Koehler 1922b) Fig. 7A–B Ophioripa conferta Koehler, 1922b: 19–21, pl. 85(9–13). Ophiomitrella falklandica Mortensen, 1936: 256–259, figs. 8c–d, pl. 7(5) [according to O’Hara, 1990]. Ophiomitrella conferta .— Madsen 1967: 127.— O’Hara 1990: 299–300, fig. 2c–d, f–g.— O’Hara & Stöhr 2006: 90–92, fig. 10f–h, 18n–o. Material examined . MD 50 CP7, MNHN IE.2009.1574 (5). MD 50 CP113, MNHN IE.2009.1575 (1). MD 50 DC146, MNHN IE.2009.1576 (14). Distribution . East Indo-West Pacific (480–1019 m), South America (79–680 m), Kerguelen (247 m), southern Australia (590–2340 m), New Zealand (27–1365 m), Antarctic (74–835 m). SPA (420–1680 m). Remarks . The MD 50 specimens are up to 7 mm dd, the disc scales coarse and imbricating with 1–2 stumps, to 0.6 mm high, vase-shaped to capitate, rough/thorny at tip (Fig. 7A). The radial shields are broadly triangular, and distally contiguous. There are three long cylindrical, blunt tipped oral papillae, sunken oral plates, and rhomboid oral shields. The VAPs are small and separate, with a notched distal edge (Fig. 7B). The LAPs bear up to six rounded arm spines, with a finely thorny surface, uppermost are longest, to 1.3 mm long, two times the length of a segment. The lowest arm spines have conspicuous ventrally directed thorns distally. The single tentacle scale is lanceolate. These specimens are similar to the Southern Ocean O. conferta complex, characterised by the large capitate disc stumps. Following Madsen (1967), this complex has been placed in the genus Ophiomitrella Verrill, 1899b. However, the molecular phylogeny of O’Hara et al. (2017) shows that species placed in Ophiomitrella form several unrelated clades, one of which is a monophyletic group that contains O. conferta , O. ingrata Koehler, 1908, O. corynephora H.L. Clark, 1923 and O. clavigera (Ljungman 1865). There are two other available genus-level names that have been applied to at least one of these species. Matsumoto (1917) placed O. clavigera in his new genus Ophiosemnotes along with ...