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An illustrated catalogue of type specimens of the bathyal brittlestar genera Ophiomusium Lyman and Ophiosphalma H. L. Clark (Echinodermata: Ophiuroidea)
No full textBaker, Alan N. (2016): An illustrated catalogue of type specimens of the bathyal brittlestar genera Ophiomusium Lyman and Ophiosphalma H. L. Clark (Echinodermata: Ophiuroidea). Zootaxa 4097 (1): 1-40, DOI: 10.11646/zootaxa.4097.1.
FIGURE 28. Ophiomusium relictum RMNH V.Ech.O 2050 in An illustrated catalogue of type specimens of the bathyal brittlestar genera Ophiomusium Lyman and Ophiosphalma H. L. Clark (Echinodermata: Ophiuroidea)
No full textFIGURE 28. Ophiomusium relictum RMNH V.Ech.O 2050: a, b, dorsal and ventral disc sectors. FIGURE 29. Ophiomusium rosaceum USNM E5196: a, b, dorsal and ventral sectors.Published as part of Baker, Alan N., 2016, An illustrated catalogue of type specimens of the bathyal brittlestar genera Ophiomusium Lyman and Ophiosphalma H. L. Clark (Echinodermata: Ophiuroidea), pp. 1-40 in Zootaxa 4097 (1) on page 19, DOI: 10.11646/zootaxa.4097.1.1, http://zenodo.org/record/27098
Ophiomusium rosaceum A. H. Clark 1936
No full textOphiomusium rosaceum A. H. Clark, 1936. Figures 29 a, b Holotype USNM E 5196 Caroline station 101,Virgin Is, Puerto Rico, 548m. Main Features: Disc 6 mm d.d. with few large plates partly separated by very small plates. Radial shields widely contiguous, one row of large scales interradially. Small dorsal arm plates throughout arm. Ventral interradius with oral shield and a large distal plate, plus 1 genital plate each side. Genital slits run from adoral shields to disc edge. Two pairs of exposed tentacle pores each with 1 scale. Extremely small ventral arm plates after the first two.Published as part of Baker, Alan N., 2016, An illustrated catalogue of type specimens of the bathyal brittlestar genera Ophiomusium Lyman and Ophiosphalma H. L. Clark (Echinodermata: Ophiuroidea), pp. 1-40 in Zootaxa 4097 (1) on page 20, DOI: 10.11646/zootaxa.4097.1.1, http://zenodo.org/record/27098
Ophiomusium alecto A. H. Clark 1936
No full textOphiomusium alecto A. H. Clark, 1936. Figures 2 a, b Holotype USNM E0005197, north of Puerto Rico, 183–549 m, RV Caroline, Johnson-Smithsonian Deep Sea Expedition March 1933. Main Features: Disc diameter 4 mm, disc circular. Arms 8 mm. Dorsal surface dominated by primary plates and radial shields. A large interradial plate present. First 5 dorsal arm plates swollen, remainder low and hardly visible. 3–4 arm spines, lower and middle ones longest. Two ventral arm plates, 2 pairs of exposed tentacle pores, genital slits long and raised at edges, sinuous.Published as part of Baker, Alan N., 2016, An illustrated catalogue of type specimens of the bathyal brittlestar genera Ophiomusium Lyman and Ophiosphalma H. L. Clark (Echinodermata: Ophiuroidea), pp. 1-40 in Zootaxa 4097 (1) on page 6, DOI: 10.11646/zootaxa.4097.1.1, http://zenodo.org/record/27098
Ophiosphalma armatum Koehler 1922
No full textOphiosphalma armatum (Koehler, 1922). Figures 41 a, b Ophiomusium armatum Koehler, 1922. Lectotype USNM 0 0 40923 Albatross Station 5428 eastern Palawan, 2021m. Dr Marc Eleaume, Paris Museum, has recently informed me that a syntype of this species in in their collection: NMNH 10384, ex- Albatross Expedition. Main Features: Disc diameter 11 mm. Glabrous surface. Dorsal arm plates throughout length of arms, diamond-shaped. 6 subequal arm spines. 3 pairs of exposed tentacle pores, each with 2 tentacle scales. Long genital slits extending to disc edge, and bordered each side by bead-like papillae. Lemon-shaped oral shield, 6 oral papillae.Published as part of Baker, Alan N., 2016, An illustrated catalogue of type specimens of the bathyal brittlestar genera Ophiomusium Lyman and Ophiosphalma H. L. Clark (Echinodermata: Ophiuroidea), pp. 1-40 in Zootaxa 4097 (1) on page 26, DOI: 10.11646/zootaxa.4097.1.1, http://zenodo.org/record/27098
Ophiomusium scalare Lyman 1878
No full textOphiomusium scalare Lyman, 1878. Figures 32 a, b Ophiomusium scalare Lyman, 1878; Stöhr, 2011. Holotype BMNH 82.12. 23.434, Challenger station 171, Kermadec Is, 1097m; 7 specimens ZSI 5110 off Port Blair, Andaman Is, 204m (identified by Koehler 1897). Main Features: Disc of type 5 mm in diameter. Disc plates have thickened distal margins and those in the interradii protrude. Surface of disc and arm plates rough. Radial shields separated by two or three plates. Ventral surface resembles O. simplex, but the sutures are all accentuated. Two pairs of exposed tentacle pores, each with a scale. Two ventral arm plates, and small dorsal arm plates on proximal segments at least. Two, then three small arm spines.Published as part of Baker, Alan N., 2016, An illustrated catalogue of type specimens of the bathyal brittlestar genera Ophiomusium Lyman and Ophiosphalma H. L. Clark (Echinodermata: Ophiuroidea), pp. 1-40 in Zootaxa 4097 (1) on page 20, DOI: 10.11646/zootaxa.4097.1.1, http://zenodo.org/record/27098
Ophiomusium fallax Koehler 1904
No full textOphiomusium fallax Koehler 1904. Figures 12 a, b Ophiomusium fallax Koehler, 1904; H. L. Clark, 1915. Synypes (3), RMNH V.Ech. O. 6342, Siboga Station 156, NW of Palau Belau, S of Philippines, 469 m. Main Features: Disc covered with similar-sized plates, radial shields only slightly larger. Dorsal midline of arms sunken, lateral arm plates bulbous, with small, low dorsal arm plates present. Koehler did not record the dorsal arm plates, but they are present all in 3 type specimens. No exposed tentacle pores or ventral arm plates.Published as part of Baker, Alan N., 2016, An illustrated catalogue of type specimens of the bathyal brittlestar genera Ophiomusium Lyman and Ophiosphalma H. L. Clark (Echinodermata: Ophiuroidea), pp. 1-40 in Zootaxa 4097 (1) on page 10, DOI: 10.11646/zootaxa.4097.1.1, http://zenodo.org/record/27098
Ophiomusium mutum Hertz
No full textOphiomusium mutum (Hertz) 1927. Figures 26 a, b Ophiomusium facunda var muta Hertz 1927. Ophiomusium facundum mutum Hertz, 1927. Stöhr, 2015. Syntypes (2) ZMUC, Valdivia Station 254, off southern Somalia, 977m. Main Features: The larger of the two type specimens of this species is 16 mm d.d. It has tiny arm spines, dominating lateral arm plates, and has narrower oral shields than O. facundum, and the ventral interradial plate is naked. These features separate it from that species. The holotype of O. mutum is in the Berlin Museum. A recent enquiry to the ZMUC about the syntypes indicated that they cannot now be identified in the collection.Published as part of Baker, Alan N., 2016, An illustrated catalogue of type specimens of the bathyal brittlestar genera Ophiomusium Lyman and Ophiosphalma H. L. Clark (Echinodermata: Ophiuroidea), pp. 1-40 in Zootaxa 4097 (1) on page 18, DOI: 10.11646/zootaxa.4097.1.1, http://zenodo.org/record/27098
Ophiomusium testudo Lyman 1875
No full textOphiomusium testudo Lyman 1875. Figures 35 a, b, c Ophiomusium testudo Lyman 1875; H. L. Clark, 1941. Holotype MCZ 485, Hassler Expedition, off Barbados, 182m. Main Features: Few imbricating disc plates, finely granular. Radial shields separated by a triangular plate. Interradial plate small. Dorsal arm plates throughout in median groove. Two ventral arm plates each with a pair of exposed tentacle pores, each with a scale. 3 small arm spines low down on lateral arm plates. Lateral arm plates finely granular. Ventral interradial area consists of large bell-shaped oral shield and a similarly large distal plate, with two or three smaller plates at the disc margin.Published as part of Baker, Alan N., 2016, An illustrated catalogue of type specimens of the bathyal brittlestar genera Ophiomusium Lyman and Ophiosphalma H. L. Clark (Echinodermata: Ophiuroidea), pp. 1-40 in Zootaxa 4097 (1) on page 22, DOI: 10.11646/zootaxa.4097.1.1, http://zenodo.org/record/27098
Ophiosphalma diomedeae Lutkeni & Mortensen 1899
No full textOphiosphalma diomedeae (Lütkeni & Mortensen, 1899). Figures 47 a, b Ophiomusium diomedeae Lütkeni & Mortensen, 1899 Syntypes (2), USNM 19501, Albatross 1891, E San Cristobal Id, Galapagos 702 m. Main Features: Disc flat with well-defined scales, many in centre. Radial shields less than half disc radius, finely rugose and non-imbricating. Arm plates throughout, 6 small thick arm spines. 3 large exposed tentacle pores and 1 occasionally 2 tentacle scales. Genital slits run to the edge of the disc. Genital papillae strong abradially only. Oral shield small, oral plate large. One juvenile specimen, 5 mm d.d. has the radial shields joined for the first third, and all the disc plates have 3–4 small tubercles.Published as part of Baker, Alan N., 2016, An illustrated catalogue of type specimens of the bathyal brittlestar genera Ophiomusium Lyman and Ophiosphalma H. L. Clark (Echinodermata: Ophiuroidea), pp. 1-40 in Zootaxa 4097 (1) on page 29, DOI: 10.11646/zootaxa.4097.1.1, http://zenodo.org/record/27098
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