Ophiomyces grandis Lyman 1879
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2025
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| author | O'Hara, Timothy D. Thuy, Ben |
| author_facet | O'Hara, Timothy D. Thuy, Ben |
| contents | <p><b><i>Ophiomyces grandis</i> Lyman, 1879</b></p><p>Fig. 19g –k, 21i</p><p><i>Ophiomyces grandis</i> Lyman, 1879: 46–47, pl. 14(383–385). <b>—</b> Lyman, 1882: 241–242, pl. 19(13–15). <b>—</b> Paterson, 1985: 75–76, fig. 31 (in part). <b>—</b> O’Hara, 1990: 302–303, fig. 2k.</p><p>Non <i>Ophiomyces grandis</i>. <b>—</b> Cherbonnier, 1965: 846, fig g–k. <b>—</b> Paterson, 1985: 75–76 (in part). <b>—</b> Litvinova, 2001: 147–148, fig. 2–3. <b>—</b> Ordines <i>et al.</i> 2019: 1819–1821, fig. 2 [= <i>Ophiomyces peresi</i> Reys, 1961].</p><p>STUDY MATERIAL. <b>—</b> MD208: stn CP4913, Walters shoal, Plaine Sud, 33° 48.82´S, 44° 5.9699´E to 33° 51.8´S, 44° 4.72´E, 1539–1615 m, 11/5/2017: 1 (MNHN IE.2016.1377). <b>—</b> MD208: stn CP4914, Walters shoal, Plaine Sud, 33° 51.1´S, 44° 4.8999´E to 33° 54.73´S, 44° 3.2199´E, 1598–1714 m, 11/5/2017: 4 (MNHN IE.2016.1372) (<b>DNA code= IE.2016.1372</b>).</p><p>COMPARATIVE MATERIAL EXAMINED. <i>Ophiomyces delata</i> Koehler, 1904: BIOPAPUA/CP3639, Sud de Lae, Golfe de Huon, 7° 23´S, 147° 35´E, 900–932 m, 23/8/2010, MNHN IE.2023.4070 (<b>DNA code=BP34</b>). in2022_ v08/143, Cocos (Keeling), 12° 13.526´S, 96° 57.5957´E to 12° 14.351´S, 96° 58.2647´E, 1113–1343 m, 17/10/2022, identified by O’Hara (2024b), MV F307642 (<b>DNA code=F307642</b>). IN2022 _ V09 /116, Site:038, 23° 9.354´S, 112° 48.3609´E, 992 m, 9/12/2022, MV F310378 (<b>DNA code=F310378</b>). <i>Ophiomyces grandis</i> Lyman, 1879: Challenger / 135E, Tristan d’Acunha, 37° 21´S, 12° 22.5´W, 1828 m, 18/10/1873, holotype, NHMUK 1882.12.23.291. IN2018 _ V06 /007, Deep west of Pedra, 44° 20.844´S, 146° 56.82´E to 44° 22.596´S, 146° 56.76´E, 1745 m, 24/11/2018, MV F272372 (<b>DNA code=F272372</b>). TAN0307/31, Campbell Plateau, 49° 19.56´S, 176° 33.12´E to 49° 19.62´S, 176° 32.32´E, 1522–1552 m, 21/4/2003, NIWA 48457 (14). TAN0307/85, Bollons Seamount, 49° 48.69´S, 176° 33.5´W, 1266 m, 2/5/2003, NIWA 48621.</p><p>COMPARATIVE MATERIAL NOT EXAMINED. <i>Ophiomyces peresi</i> Reys, 1961: INTEMARES-A22B_ 0718/20, Ses Olives seamount, 38° 56.1´N, 1° 57.97´E, 275 m, 7/2018, identified by Ordines <i>et al.</i> 2019 as <i>Ophiomyces grandis</i>, CFM 7020-7022 (<b>DNA code= MK934137</b>).</p><p><b>Distribution</b>. SE Australia (1000–1840 m); Campbell Plateau/Bollons Seamount (1266–1522 m); Tristan da Cunha (1828 m), Walters Shoal (1539–1714).</p><p><b>Remarks</b>. <i>Ophiomyces grandis</i> (type locality Tristan da Cunha) is a southern hemisphere mid-bathyal (1000– 1840 m) species, found on seamounts, and is characterised by having only the most distal oral papillae widened at the tip like hockey sticks and up to 3 tentacle scales on the ventral arm plates and several on the lateral arm plates (O’Hara 1990). The MD 208 specimens measure up to 7 mm dd, and have dimorphic arm spines, with the 4 lowest pointed and as long as the segment and the upper 5–6 short and needle-like. Unlike in the genera <i>Ophiotholia</i> and <i>Ophiohelus</i>, there are no parasol-shaped arm spines. The vertebrae (Fig. 19k) have pronounced vertical zygocondyles and a small reduced zygosphene. The LAPs (Fig. 19g –h) have a long ventral extension that meets on the mid-radius and separates the VAPs (Fig. 19j). The arm spine articulations consist of two convex lips orientated vertically, the arm spines themselves (Fig. 19i) have a pronounced groove along their length. The living colour is an off-white (Fig. 6f).</p><p><i>Ophiomyces grandis</i> has also been reported from the North Atlantic in 124–802 m (Cherbonnier 1965; Paterson 1985; Ordines <i>et al.</i> 2019). The latter study supplies the only DNA sequence (MK934137, COI) available from this region, which is distinct from the southern hemisphere <i>O. grandis</i>. This, and the shallower bathymetric distribution of the North Atlantic specimens (124–802 m), suggests that it represents a separate species for which the name <i>Ophiomyces peresi</i> Reys, 1961 (Type locality: Gorringe Bank, North of Madeira, 200 m) is available.</p> |
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| publishDate | 2025 |
| publisher | Zenodo |
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| spellingShingle | Ophiomyces grandis Lyman 1879 O'Hara, Timothy D. Thuy, Ben Biodiversity Taxonomy Animalia Echinodermata Ophiuroidea Ophioscolecida Ophiohelidae Ophiomyces Ophiomyces grandis <p><b><i>Ophiomyces grandis</i> Lyman, 1879</b></p><p>Fig. 19g –k, 21i</p><p><i>Ophiomyces grandis</i> Lyman, 1879: 46–47, pl. 14(383–385). <b>—</b> Lyman, 1882: 241–242, pl. 19(13–15). <b>—</b> Paterson, 1985: 75–76, fig. 31 (in part). <b>—</b> O’Hara, 1990: 302–303, fig. 2k.</p><p>Non <i>Ophiomyces grandis</i>. <b>—</b> Cherbonnier, 1965: 846, fig g–k. <b>—</b> Paterson, 1985: 75–76 (in part). <b>—</b> Litvinova, 2001: 147–148, fig. 2–3. <b>—</b> Ordines <i>et al.</i> 2019: 1819–1821, fig. 2 [= <i>Ophiomyces peresi</i> Reys, 1961].</p><p>STUDY MATERIAL. <b>—</b> MD208: stn CP4913, Walters shoal, Plaine Sud, 33° 48.82´S, 44° 5.9699´E to 33° 51.8´S, 44° 4.72´E, 1539–1615 m, 11/5/2017: 1 (MNHN IE.2016.1377). <b>—</b> MD208: stn CP4914, Walters shoal, Plaine Sud, 33° 51.1´S, 44° 4.8999´E to 33° 54.73´S, 44° 3.2199´E, 1598–1714 m, 11/5/2017: 4 (MNHN IE.2016.1372) (<b>DNA code= IE.2016.1372</b>).</p><p>COMPARATIVE MATERIAL EXAMINED. <i>Ophiomyces delata</i> Koehler, 1904: BIOPAPUA/CP3639, Sud de Lae, Golfe de Huon, 7° 23´S, 147° 35´E, 900–932 m, 23/8/2010, MNHN IE.2023.4070 (<b>DNA code=BP34</b>). in2022_ v08/143, Cocos (Keeling), 12° 13.526´S, 96° 57.5957´E to 12° 14.351´S, 96° 58.2647´E, 1113–1343 m, 17/10/2022, identified by O’Hara (2024b), MV F307642 (<b>DNA code=F307642</b>). IN2022 _ V09 /116, Site:038, 23° 9.354´S, 112° 48.3609´E, 992 m, 9/12/2022, MV F310378 (<b>DNA code=F310378</b>). <i>Ophiomyces grandis</i> Lyman, 1879: Challenger / 135E, Tristan d’Acunha, 37° 21´S, 12° 22.5´W, 1828 m, 18/10/1873, holotype, NHMUK 1882.12.23.291. IN2018 _ V06 /007, Deep west of Pedra, 44° 20.844´S, 146° 56.82´E to 44° 22.596´S, 146° 56.76´E, 1745 m, 24/11/2018, MV F272372 (<b>DNA code=F272372</b>). TAN0307/31, Campbell Plateau, 49° 19.56´S, 176° 33.12´E to 49° 19.62´S, 176° 32.32´E, 1522–1552 m, 21/4/2003, NIWA 48457 (14). TAN0307/85, Bollons Seamount, 49° 48.69´S, 176° 33.5´W, 1266 m, 2/5/2003, NIWA 48621.</p><p>COMPARATIVE MATERIAL NOT EXAMINED. <i>Ophiomyces peresi</i> Reys, 1961: INTEMARES-A22B_ 0718/20, Ses Olives seamount, 38° 56.1´N, 1° 57.97´E, 275 m, 7/2018, identified by Ordines <i>et al.</i> 2019 as <i>Ophiomyces grandis</i>, CFM 7020-7022 (<b>DNA code= MK934137</b>).</p><p><b>Distribution</b>. SE Australia (1000–1840 m); Campbell Plateau/Bollons Seamount (1266–1522 m); Tristan da Cunha (1828 m), Walters Shoal (1539–1714).</p><p><b>Remarks</b>. <i>Ophiomyces grandis</i> (type locality Tristan da Cunha) is a southern hemisphere mid-bathyal (1000– 1840 m) species, found on seamounts, and is characterised by having only the most distal oral papillae widened at the tip like hockey sticks and up to 3 tentacle scales on the ventral arm plates and several on the lateral arm plates (O’Hara 1990). The MD 208 specimens measure up to 7 mm dd, and have dimorphic arm spines, with the 4 lowest pointed and as long as the segment and the upper 5–6 short and needle-like. Unlike in the genera <i>Ophiotholia</i> and <i>Ophiohelus</i>, there are no parasol-shaped arm spines. The vertebrae (Fig. 19k) have pronounced vertical zygocondyles and a small reduced zygosphene. The LAPs (Fig. 19g –h) have a long ventral extension that meets on the mid-radius and separates the VAPs (Fig. 19j). The arm spine articulations consist of two convex lips orientated vertically, the arm spines themselves (Fig. 19i) have a pronounced groove along their length. The living colour is an off-white (Fig. 6f).</p><p><i>Ophiomyces grandis</i> has also been reported from the North Atlantic in 124–802 m (Cherbonnier 1965; Paterson 1985; Ordines <i>et al.</i> 2019). The latter study supplies the only DNA sequence (MK934137, COI) available from this region, which is distinct from the southern hemisphere <i>O. grandis</i>. This, and the shallower bathymetric distribution of the North Atlantic specimens (124–802 m), suggests that it represents a separate species for which the name <i>Ophiomyces peresi</i> Reys, 1961 (Type locality: Gorringe Bank, North of Madeira, 200 m) is available.</p> |
| title | Ophiomyces grandis Lyman 1879 |
| topic | Biodiversity Taxonomy Animalia Echinodermata Ophiuroidea Ophioscolecida Ophiohelidae Ophiomyces Ophiomyces grandis |
| url | https://doi.org/10.5281/zenodo.17891355 |