Basic info Taxonomic history Classification Relationships
Morphology Ecology and taphonomy External Literature Search Age range and collections


Ophiuroidea - Oegophiurida - Protasteridae

Synonymy list
YearName and author
1849Protaster Forbes figs. pl. 4 fig. 1, 2
1903Bohemura Jaekel p. 111
1915Bohemura Schuchert p. 223
1915Protaster Schuchert pp. 224-226 figs. text-fig. 23
1930Urosoma Spencer
1934Protaster Spencer pp. 456-457
1934Bohemura Spencer pp. 472-476
1965Protaster Owen p. 549
1965Bohemura Owen p. 550
1965Urosoma Owen p. 553
1966Bohemura Spencer and Wright p. U87
1966Protaster Spencer and Wright p. U87
1966Urosoma Spencer and Wright p. U87
1978Urosoma Harper and Morris p. 156
1983Protaster Haude and Thomas p. 124
1986Bohemura Hammann and Schmincke p. 61
1986Protaster Hammann and Schmincke p. 61
2002Bohemura Sepkoski, Jr.
2002Protaster Sepkoski, Jr.
2002Urosoma Sepkoski, Jr.
2005Protaster Dean Shackleton p. 88

Is something missing? Join the Paleobiology Database and enter the data


If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

W. Hammann and S. Schmincke 1986 (Bohemura)Disc: plates stellate; marginals and spines small; madreporite stellate. Arms: whip-shaped; ambulacrals dorsally quadrate, ventrally stout, boot-shaped; laterals ear-shaped; broad with protruding oral edge; 6(?) slender grooved vertical spines; 6(?) groove spines.
W. Hammann and S. Schmincke 1986Disc: plate rhomboidal; no marginals and spines; madreporite smooth. Arms: tips not preserved in type; ambulacrals dorsally quadrate, ventral stout, boot-shaped; laterals ear-shaped; groove and vertical spines not seen.
J. Dean Shackleton 2005Conspicuous interradial disc, elongate gradually tapering arms, oral disc plate sub-polygonal, aboral plates with large epispire gaps (often in rows). Disc plates apparently ot spine beraing in type, although oral disc plates spine bearing in other species; overlain by granules. Rounded madreporite with single large channel, oral, interradial, in type contacting adambulacral paire with second recognisable arm ambulacral. Thickened marginal rim; marginal absent. Ambulacral ossicles alternate over the mid-line, perradial suture slightly zigzag aborally, straight orally. Aboral ambulacral quadrate, with relatively conspicuous ridg-bounded indentations presumably for longitudinal muscle insertion. Oral ambulacral surface with prominent boot-shape and distal facet for logitudinal ambulacral articulation; grooe crosses distal surface from podial region to perradius, circular hell depression on ambulacrals. Podial basin large, broader then long in proximal arm. Ambulacral ossicles sicke-shaped, with distal and proximal pads and conspicuous nose, reduce in size proximally. Groove spines present, articulating to oral adambulacral ridge. Stout mouth angle bearing row of lateral teeth. Strong aboral jaw 'v' formed by first and second jaw ossicles overrides distally adjacent ambulacrals slightly.