Ophiura flagellata ( Lyman, 1878 )

Granja-Fernández, Rebeca, Hendrickx, Michel E., Rangel-Solís, Pedro Diego & López-Pérez, Andrés, 2023, Deep-sea Ophiuroidea (Echinodermata) collected during the TALUD cruises in western Mexico, Zootaxa 5259 (1), pp. 1-71 : 22-24

publication ID	https://doi.org/10.11646/zootaxa.5259.1.1
publication LSID	lsid:zoobank.org:pub:4306F52E-FD24-45B0-B307-66B71173D805
DOI	https://doi.org/10.5281/zenodo.7798732
persistent identifier	https://treatment.plazi.org/id/03AB87FA-FFB4-FFC2-FF7B-FA2DFE44FBDA
treatment provided by	Plazi (2023-04-03 13:18:02, last updated 2024-11-28 20:47:02)
scientific name	Ophiura flagellata ( Lyman, 1878 )
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Treatment

Ophiura flagellata ( Lyman, 1878) View in CoL View at ENA

Fig. 4G‒L View FIGURE 4

Ophioglypha flagellata Lyman, 1878: 69 , pl. 2, figs. 49‒51.

Gymnophiura coerulescens Lütken & Mortensen, 1899: 114‒116 , pl. 7, figs. 4‒6.

Ophiura flagellata View in CoL . H.L. Clark 1911: 61, fig. 15; 1913: 208.— Koehler 1922: 375‒377, pl. 85, figs. 1, 6, 7, pl. 86, figs. 1‒4, 10.— Paterson 1985: 120, fig. 44.— Lambert & Boutillier 2011: 51, fig. 37.

Material examined. 57 individuals at eight stations. TALUD VIII, Sta. 3, 3 ind. (ICML-EMU-11143-A), and 1 ind. (ICML-EMU-11716). TALUD IX, Sta. 21B, 1 ind. (ICML-EMU-11143-B). TALUD XII, Sta. 9, 12 ind. (ICML-EMU-11140); Sta. 24, 8 ind. (ICML-EMU-11141); Sta. 27, 4 ind. (ICML-EMU-11142-A); Sta. 29, 5 ind. (ICML-EMU-11142-B). TALUD XV, Sta. 5F, 1 ind. (ICML-EMU-11146); Sta. 9, 18 ind. (ICML-EMU-11145) and 4 ind. (ICML-EMU-11692).

Comparative material. Gymnophiura coerulescens Lu ̈tken & Mortensen, 1899, syntypes, 5 ind.: MCZ OPH-786 , USNM 19440 About USNM , USNM 19441 About USNM (Supplementary file 2).

Description (ICML-EMU-11145). DD = 15 mm. Disc rounded, flat. Dorsal disc covered by minute and imbricated scales. Rays of integument in RS and project from the arms. RS broader than long, circular, separated by numerous scales and the arm width, covering 1/9 of disc radius ( Fig. 4G View FIGURE 4 ). Ventral interradii covered by irregular imbricated scales, larger than dorsal scales. Genital slits with numerous pointed, small genital papillae; projecting dorsally and forming well-developed arm combs with larger papillae ( Fig. 4H View FIGURE 4 ). OSh longer than broad, nearly pentagonal. Madreporite not evident. AdSh longer than broad, elongated, slender, meeting in front of OSh. Jaws bearing 4‒5 papillae at each side; BSc, IPa, 2IPa and TPa oval, pointed, all of similar size. vT pointed and larger than oral papillae. Preceding ossicles separated by a diastema: one AdShSp, 4‒5 2AdShSp. Arms gradually narrowing distally ( Fig. 4I View FIGURE 4 ). DAP broader than long, rectangular, meeting. Longitudinal middle keel along the dorsal arm ( Fig. 4J View FIGURE 4 ). VAP rhomboidal, meeting, separating and decreasing in size distally. LAP with 3‒4 ArSp, very long (approximately two arm segments in length), pointed, dorsalmost the longest. First tentacle pores with 4‒5 oblong TSc; subsequent tentacle pores with up to six TSc, diminishing in number until reaching one distally ( Fig. 4K View FIGURE 4 ). Color pattern beige-whitish ( Fig. 4G‒L View FIGURE 4 ). Radial rays darkening in dorsal disc by a scale-less disc center (ethanol preservation) ( Fig. 4G View FIGURE 4 ).

Habitat and distribution. South Africa, Indonesia, Australia, Japan, Bering Sea, and Alaska. In the eastern tropical Pacific in Mexico and off the Galapagos Islands; 96‒ 2,330 m depth, associated with rocky and muddy bottoms (H.L. Clark 1917; Imaoka et al. 1990; Rowe & Gates 1995; Lambert & Boutillier 2011; Granja-Fernández et al. 2015). The material examined was collected off western Baja California Sur, in the Gulf of California, and off Jalisco, Colima, and Guerrero; 1,035 ‒1,643 m depth.

Remarks. It was impossible to examine the type material of Ophiura flagellata . However, O. flagellata features several morphological differences compared to Gymnophiura coerulescens , including the radial shield shape, the arm spines length, the tentacle scales number, and the length of the spines on the arm combs (H.L. Clark 1911; Koehler 1922). The TALUD material examined matches the morphology of G. coerulescens (distributed in the eastern tropical Pacific; Lütken & Mortensen 1899), which probably corresponds to a valid species, but further studies, including material from the valid and synonymous of O. flagellata , are needed to confirm this. Previously known in the Mexican Pacific off western Baja California Sur and in the Gulf of California ( Granja-Fernández et al. 2015). Samples of O. flagellata collected off Jalisco, Colima, and Guerrero represent new distribution records for these Mexican Pacific areas.

References

Clark, H. L. (1911) North Pacific Ophiurans in the collection of the United States National Museum. U. S. National Museum Bulletin, 75, 1 - 302. https: // doi. org / 10.5479 / si. 03629236.75.1

Clark, H. L. (1917) Reports on the scientific results of the expedition to the Eastern Tropical Pacific in charge of Alexander Agassiz, by the U. S. Fish Commission Steamer Albatross from October, 1904, to March, 1905, Lieut. Commander L. M. Garrett U. S. N., Commanding. XXX. Ophiuroidea. Bulletin of the Museum of Comparative Zoology at Harvard College, 61 (12), 429 - 453.

Granja-Fernandez, R., Herrero-Perezrul, M. D., Lopez-Perez, R. A., Hernandez-Morales, A. & Rangel-Solis, P. D. (2015) A literature review of the Ophiuroidea (Echinodermata) from the Pacific coast of Mexico. Revista de Biologia Tropical, 63 (2), 37 - 47.

Imaoka, T., Irimura, S., Okutani, T., Oguro, C., Oji, T., Shigei, M. & Horikawa, H. (1990) Echinoderms of the continental shelf and slope around Japan. Vol. 1. Japan Fisheries Resource Conservation Association, Tokyo, 138 pp.

Koehler, R. (1922) Ophiurans of the Philippine Seas and adjacent waters. Bulletin of the United States National Museum, 100, 1 - 486. https: // doi. org / 10.5962 / bhl. title. 32917

Lambert, P. & Boutillier, J. (2011) Deep-sea Echinodermata of British Columbia, Canada. Canadian Technical Report of Fisheries and Aquatic Sciences, 2929, 1 - 140.

Lyman, T. (1878) Ophiuridae and Astrophytidae of the Challenger expedition. Part I. Bulletin of the Museum of Comparative Zoology at Harvard College, 5 (7), 65 - 168.

Lu ¨ tken, C. F. &. Mortensen, T. (1899) The Ophiuridae. Memoirs of the Museum of Comparative Zoology at Harvard College, 23 (2), 93 - 208.

Paterson, G. L. J. (1985) The deep-sea Ophiuroidea of the North Atlantic Ocean. Bulletin of the British Museum (Natural History) Zoology, 49 (1), 1 - 162.

Rowe, F. W. E. & Gates, J. (1995) Echinodermata. CSIRO, Melbourne, 510 pp.

Wyville-Thomson, C. (1873) The depths of the sea. An account of the general results of the dredging cruises of H. M. S. S. ' Porcupine' and ' Lightning' during the summers of 1868, 1869, and 1870, under the scientific direction of Dr. Carpenter, F. R. S, J. Gwyn Jeffreys, F. R. S., and Dr. Wyville Thomson, F. R. S. Macmillan and Co, London, 527 pp. https: // doi. org / 10.5962 / bhl. title. 19314

Figures

FIGURE 4. Ophiomusa lymani (Wyville-Thomson, 1873) (ICML-EMU-11078, DD = 23 mm). A, Dorsal disc; B, Ventral disc; C, Mouth; D, Dorsal arm; E, Ventral arm; F, Dorsal view. Ophiura flagellata (Lyman, 1878) (ICML-EMU-11145, DD = 15 mm). G, Dorsal disc; H, Ventral disc; I, Mouth; J, Dorsal arm; K, Ventral arm; L, Dorsal view.