Ophiocreas oedipus Lyman 1879
Ophiocreas oedipus Lyman, 1879 Figs 3D, 4C, H–I, 6 Ophiocreas oedipus – Lyman, 1879: 65, pl. XVI figs 443–446. Ophiocreas oedipus – Lyman, 1882: 283, pl. XXXI figs 5–8, pl. XLVI fig. 1. — Koehler, 1909: 206, pl. VII fig. 2. — Clark, 1911: 283. — Paterson 1985: 18, fig. 10. — McKnight, 1993: 174. Mat...
| Main Authors: | , |
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| Format: | Other/Unknown Material |
| Language: | unknown |
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Zenodo
2023
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| Online Access: | https://doi.org/10.5281/zenodo.7938581 http://treatment.plazi.org/id/03C7879FB23EFFA0FDB9FC97FB4BFDD5 |
| Summary: | Ophiocreas oedipus Lyman, 1879 Figs 3D, 4C, H–I, 6 Ophiocreas oedipus – Lyman, 1879: 65, pl. XVI figs 443–446. Ophiocreas oedipus – Lyman, 1882: 283, pl. XXXI figs 5–8, pl. XLVI fig. 1. — Koehler, 1909: 206, pl. VII fig. 2. — Clark, 1911: 283. — Paterson 1985: 18, fig. 10. — McKnight, 1993: 174. Material examined WESTERN SAHARA • 1 spec., 10.42 mm dd; 26°39′46″– 26°41′48″ N, 14°45′20″– 14°42′44″ W; depth 1593– 1588 m; 8 Dec. 2005; Maroc-0511 exped.; stn MO171; Maroc-0511-16715; LZM-UV • 1 spec., 10.88 mm dd; 26°23′25″– 26°26′32″ N, 15°17′44″– 15°18′14″ W; depth 1615–1755 m; 11 Dec. 2005; Maroc-0511 exped.; stn MO181; Maroc-051107632; LZM-UV. Distribution Ophiocreas oedipus Lyman, 1879 has a wide geographical distribution in warm and temperate waters. It has been recorded in the Indo-Pacific area (New Zealand to Japan) (Koehler 1904; Clark 1911; Baker 1980; McKnight 1993), between 350 (material deposited in MNHN) and 1994 m (Koehler 1904). In the Atlantic Ocean, it was reported from Ascension Island between 756 and 778 m (Lyman 1882), Madeira from 1500 to 1968 m (Koehler 1909) and from several Northwest Atlantic seamounts (Mosher & Watling 2009; Cho & Shank 2010). We collected this species at only four stations in Western Sahara, between 909 and 1755 m depth, representing the first record on West African continental margin. Remarks Ophiocreas oedipus and Asteroschema inornatum are very similar species. Nevertheless, they can be distinguished chiefly by several characters. In A. inornatum , both dorsal and ventral surfaces are more densely covered by granules, even in juveniles. However, the dorsal granulation on the disc seems to be a slightly variable character in O. oedipus , with different densities of coverage among specimens. Radial shields are quite parallel and aligned with the arms in A. inornatum , giving continuity between the disc and arms; however, in O. oedipus , the radial shields are divergent – closer in the proximal part – and with a marked ridge, forming a border between the disc and ... |
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