Tropiometridae

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Tropiometridae is a family of echinoderms belonging to the order Comatulida.[1]

Genera:[1]

References

  1. ^ a b "Tropiometridae". www.gbif.org. Retrieved 8 April 2021.
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Tropiometridae: Brief Summary

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Tropiometridae is a family of echinoderms belonging to the order Comatulida.

Genera:

Tropiometra Clark, 1907
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Diagnosis

provided by World Register of Marine Species
A family of Tropiometroidea with centrodorsal large, thick discoidal to low columnar with large, flattened, cirrus-free aboral area; cirrus sockets large, without distinct ornament, arranged irregularly but tending to form 15 or 20 columns; cirri stout, without aboral spines; cirrals 20-40, generally wider than long; no aboral star; rod-shaped basals not united around center, tapering and rarely exposed on surface; radial articular facet steep and wide; adoral muscle fossae large, wide; radial cavity wide; no central plug; brachials wider than high; 10 arms only; synarthry between Ibr1 and br22 and between br1 and br2. Syzygy between br3 and br4; pinnules without distinct ambulacral covering plates.
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bibliographic citation
Hess H, Messing CG (2011) Comatulida. In: Hess H, Messing CG, Ausich WI. Treatise on Invertebrate Paleontology, Part T, Echinodermata 2 Revised, Crinoidea, vol. 3. University of Kansas Press, Lawrence, Kansas, pp. 70–146.
contributor
Messing, Charles, C.G.