Ophiuroidea (Ophiuroids)

Brittle stars or ophiuroids are echinoderms in the class Ophiuroidea closely related to starfish. They crawl across the seafloor using their flexible arms for locomotion. The ophiuroids generally have five long slender, whip-like arms which may reach up to 60 centimetres (24 in) in length on the largest specimens. They are also known as serpent stars. Ophiuroidea contains two large clades, Ophiurida (brittle stars) and Euryalida (basket stars). Many of the ophiuroids are rarely encountered in the relatively shallow depths normally visited by humans, but they are a diverse group. There are some 1,500 species of brittle stars living today, and they are largely found in deep waters more than 500 metres (1,650 feet) down.

Source: http://en.wikipedia.org/wiki/Ophiuroidea

Ophiura	AD, Bulletin of Geosciences 87/1 (na obálce)	p2147
Ophiuroidea Gray, 1840		PP569
Ophiuroidea Gray, 1840		PB700
Ophiuroidea Gray, 1840		PP568
Ophiuroidea Gray, 1840		PP570
Ophiuroidea Gray, 1840		XA83
Ophiuroidea Gray, 1840		XA84
Ophiuroidea Gray, 1840		PP573
Ophiuroidea Gray, 1840		PP574
Ophiuroidea Gray, 1840		XA82
Ophiuroidea Gray, 1840		XA60
Ophiuroidea Gray, 1840		XA80
Ophiuroidea Gray, 1840		PP566
Ophiuroidea Gray, 1840		PP567
Ophiuroidea Gray, 1840		XA75
Ophiuroidea Gray, 1840		PP565
Ophiuroidea Gray, 1840		PP571
Ophiuroidea Gray, 1840		PP572
Ophiuroidea Gray, 1840		BL117
Ophiuroidea Gray, 1840		BL126

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Morphology of ophiuroids (after Forbes)
a) Ophiura texturata, b) Ophiocoma neglecta (podle Forbese).
Source: http://chestofbooks.com/animals/Manual-Of-Zoology/Order-Ophiuroidea.html

Img. 84:

Img. 84:

Virtual museum of the Czech Geological Survey, www.geology.cz, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]