Synoptic Keys to the Genera of Ophiuroidea
Family Ophiocomidae Ljungman, 1867
Family Ophiocomidae Ljungman, 1867
1 (2) |
Two tentacle-scales, the inner one being greatly elongated and lanceolate. Ophiopsila Forbes, 1843. Syn.: Ophianoplus M. Sars, 1857. *aranea Forbes, 1843. Mediterranean. Littoral. |
2 (1) |
Tentacle-scales, short, leaf-like. |
3 (4) |
Disc covered by naked skin. . . . Ophiarthrum Peters, 1851. *elegans Pet., 1851. Indo-W.-Pacific. Littoral. |
4 (3) |
Disc bearing spines, or granules. |
5 (10) |
Disc bearing granules only. |
6 (7) |
Supplementary scales at base of uppermost arm-spine. . . . Ophiopteris E. A. Smith, 1877. *antipodum E. A. S., 1877. New Zealand. Littoral. |
7 (6) |
No supplementary scales. |
8 (9) |
Arm-spines hollow. . . . Ophiocomina Koehler, 1920. *Asterias nigra Abildgaard, 1789. N. Atlantic. Littoral. |
9 (8) |
Arm-spines solid. . . . Ophiocoma Agassiz, 1836. *Ophiura echinata Lmk., 1816. West Indies. Littoral. |
10 (5) |
Disc bearing spines, or spines and granules. |
11 (12) |
Five arms. . . . Ophiomastix Mueller & Troschel, 1842. Syn.: Acantharachna E. A. Smith. *Ophiura annulosa Lmk., 1816. Indonesia. Littoral. |
12 (11) |
Six or 7 arms. . . . Ophiocomella A. H. Clark, 1939. H. L. Clark (1946) regards this genus as wholly made up of juvenile stages of Ophiocoma which are supposedly 5 or 7 armed as young, 5 armed as adult This has not been proved. *caribbaea A. H. Clark, 1939. Caribbean. Littoral. |