Ophiomusa lymani
Creators
- 1. Museums Victoria, GPO Box 666 E, Melbourne, 3001, AUSTRALIA,
- 2. Natural History Museum of Luxembourg, 24 Rue Münster, 2160 Luxembourg
Description
Ophiomusa lymani (W.C. Thomson, 1873)
Fig. 5A–G
Ophiomusium lymani Thomson, 1873: 174, figs. 32–33.— Lyman 1882: 90.— Mortensen 1933b: 394.— Vadon & Guille 1984: 584.— Paterson 1985: 147–148, fig. 58.— Guille & Vadon 1986: 169.— Alva & Vadon 1989: 843.— Rowe & Gates 1995: 434.
Ophiomusa lymani.— Hertz 1927b: 103–105.
Ophiomusa lymani.— Olbers et al. 2019: 72–74, fig. 50–51.
Material examined. MD 50 CP124, MNHN IE.2009.1617 (2). MD 50 DC137, MNHN IE.2009.1616 (2).
Distribution. Arctic (95–2448 m), NW Atlantic (595–3506 m), NE Atlantic (1011–4829 m), NW Pacific (110– 2310 m), NE Pacific (62–2904 m), W Atlantic (101–1965 m), E Atlantic (415–4088 m), W Indian (457–2312 m), E Indo-W Pacific (300–3343 m), E Pacific (730–2599 m), S America (700–3394 m), S Africa (1340–2780 m), S Australia (848–3050 m), New Zealand (495–3029 m). SPA (1340–2000 m).
Remarks. Unlike many other widespread bathyal complexes, Ophiomusa lymani has always been identified as a single species that has been reported from all oceans (450–4800 m) except the Arctic and subantarctic/Antarctic. It has been previously reported from across the southern Indian Ocean from South Africa (Olbers et al. 2019), around Madagascar (Guille & Vadon 1986), Reunion (Vadon & Guille 1984), the SPA (Hertz 1927b) and Southern Australia (Rowe & Gates 1995).
The specimens from CP124 are large, 23 and 25 mm dd (Fig. 5A–D), and display all the classic characters of O. lymani, including the numerous tiny arm spines (Fig. 5C), more than three ventral disc scales, and granulated radial shields and marginal disc scales. The specimens from stn DC137 are small, 4 mm dd (Fig. 5E–G). They are identified as juvenile O. lymani on the basis of having tumid primary disc plates (see Schoener 1967), granulated disc plates including radial shields which are mostly contiguous, only three arm spines, middle one becoming hooked distally, and oval tentacle scales, associated with VAPs. At this size they are reminiscent of the O. scalare Lyman, 1878b group of species with a ventral disc surface that is dominated by a large pentagonal scale next to the oral shields which separates two tumid scales along the margin. However, O. scalare generally has smaller circular tentacle scales, disc scales may be partially covered in skin but not granulated, and the three arm spines are closely clustered together. Ophiomusa ultima Hertz, 1927b from east Africa (238–977 m) and O. africanum Koehler, 1909 from Cabo Verde (219 m) have a narrower oral shield and an upper arm spine (or two) that is separated from the others. On O. ultima the 2nd set of tentacle pores become isolated from the VAP with size, perforating the LAP, until they gradually close over and the VAP reduces in size. Ophiomusa africanum is only known from the 7 mm dd holotype, which has the second set of tentacle pores emerging through the lateral arm plate and no associated VAP.
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Family
- Ophiomusaidae
- Genus
- Ophiomusa
- Kingdom
- Animalia
- Order
- Ophiurida
- Phylum
- Echinodermata
- Scientific name authorship
- W. C. Thomson
- Species
- lymani
- Taxon rank
- species
- Taxonomic concept label
- Ophiomusa lymani (Thomson, 1873) sec. O'Hara & Thuy, 2022
References
- Thomson, W. C. (1873) The Depths of the Sea. London: Macmillan & Co.
- Lyman, T. (1882) Ophiuroidea. Report on the Scientific Results of the Voyage of the " Challenger " Zoology, 5, 1 - 385 pls. 1 - 48.
- Mortensen, T. (1933 b) The echinoderms of St. Helena. Videnskabelige Meddelelser fra Dansk Naturhistorisk Forening i KObenhavn, 93, 401 - 472.
- Vadon, C. & Guille, A. (1984) Les Ophiuridae (Ophiuroidea, Echinodermata) de la campagne MD 32 du Marion-Dufresne autour de l'ile de La Reunion. Bulletin du Museum National d'Histoire Naturelle. Paris, 6, 583 - 615.
- Paterson, G. L. J. (1985) The deep-sea Ophiuroidea of the North Atlantic Ocean. Bulletin of the British Museum (Natural History) Zoology, 49, 1 - 162.
- Guille, A. & Vadon, C. (1986) Ophiuridae de l'ocean Indien profund. Indo-Malayan Zoology, 3, 167 - 188.
- Alva, V. & Vadon, C. (1989) Ophiuroids from the western coast of Africa (Namibia and Guinea - Bissau). Scientia Marina, 53, 827 - 845.
- Rowe, F. W. E. & Gates, J. (1995) Echinodermata. In: Wells, A. (Ed.), Zoological Catalogue of Australia. Australian Government Printing Service, Canberra, pp. i - xiii + 1 - 510.
- Hertz, M. (1927 b) Die Ophiuroiden der deutschen Tiefsee-Expedition. 1. Chilophiurida Mats. (Ophiolepididae: Ophioleucidae: Ophiodermatidae: Ophiocomidae). Wissenschaftliche Ergebnisse der Deutschen Tiefsee-Expedition auf dem Dampfer ' Valdivia' 1898 - 1899, 22, 59 - 122, pls. 6 - 9.
- Olbers, J. M., Griffiths, C. L., O'Hara, T. D. & Samyn, Y. (2019) Field guide to the brittle and basket stars (Echinodermata: Ophiuroidea) of South Africa. Brussels: Royal Belgium Institute of Natural Sciences.
- Schoener, A. (1967) Post-Larval development of five deep-sea ophiuroids. Deep Sea Research and Oceanographic Abstracts, 14, 645 - 660. https: // doi. org / 10.1016 / S 0011 - 7471 (67) 80003 - 2
- Lyman, T. (1878 b) Ophiuridae and Astrophytidae of the exploring voyage of H. M. S. Challenger, under Prof. Sir Wyville Thomson, F. R. S. Part 1. Bulletin of the Museum of Comparative Zoology, Harvard University, 5, 65 - 168, 10 pls.
- Koehler, R. (1909) Echinodermes provenant des campagnes du yacht ' Princesse Alice' (Asteries, Ophiures, Echinides et Crinoides). Resultats des Scientifiques Campagnes du Prince de Monaco, 34, 1 - 317, 32 pls.