Family ZYGOMETRIDAE
Compiler and date details
2012 - Tim O'Hara, Museum Victoria, Carlton, Victoria, Australia
2001 - Tim O'Hara, Museum Victoria, Carlton, Victoria, Australia
1995 - F.W.E. Rowe & J. Gates, Australian Museum, Sydney, New South Wales, Australia
Introduction
Zygometrids are known from Japan, the East Indian region and Australia, west to Sri Lanka. Two genera are known, one of which is recorded in Australian waters, represented by four of the five known species.
The family is distinguished from others in the order Comatulida by the following combination of character states: arms always more than five; pinnule combs absent; elements of the IBr series united by syzygy; first brachial syzygy at 3+4, second at 9+10. This family as a whole is in critical need of revision.
General References
Clark, A.H. 1941. A monograph of the existing crinoids. Vol. 1. The comatulids. Part 4a.— Superfamily Mariametrida (except the family Colobometridae). Bulletin of the United States National Museum 82: 1-603 pls 1-61
Rasmussen, H.W. & Sieverts-Doreck, H. 1978. Articulata. pp. T813-T1027, figs 549-619 in Moore, R.C. & Teichert, C. (eds). Treatise on Invertebrate Paleontology. Part T. Echinodermata 2. Crinoidea. Kansas : Geological Society of America and University of Kansas Press Vol. 3.
History of changes
| Published | As part of group | Action Date | Action Type | Compiler(s) |
|---|---|---|---|---|
| 15-Sep-2023 | 11-Dec-2012 | MODIFIED | ||
| 12-Feb-2010 | (import) |