Crinoidea (Crinoids)

Crinoids are marine animals that make up the class Crinoidea of the echinoderms (phylum Echinodermata). Crinoidea comes from the Greek word krinon, "a lily", and eidos, "form". They live both in shallow water and in depths as great as 6,000 meters. Sea lilies refer to the crinoids which, in their adult form, are attached to the sea bottom by a stalk. Feather stars or comatulids refer to the unstalked forms. Crinoids are characterized by a mouth on the top surface that is surrounded by feeding arms. They have a U-shaped gut, and their anus is located next to the mouth. Although the basic echinoderm pattern of fivefold symmetry can be recognized, most crinoids have many more than five arms. Crinoids usually have a stem used to attach themselves to a substrate, but many live attached only as juveniles and become free-swimming as adults. There are only a few hundred known modern forms, but crinoids were much more numerous both in species and numbers in the past. Some thick limestone beds dating to the mid- to late-Paleozoic are almost entirely made up of disarticulated crinoid fragments.

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

Img. 81:

Grisetocrinus uresi Ureš - Le Menn - Hladil, 1999		HL14
Grisetocrinus uresi Ureš - Le Menn - Hladil, 1999	Ureš et al. (1999), Pl. 1, fig. 10	HL9
Grisetocrinus uresi Ureš - Le Menn - Hladil, 1999		HL16
Grisetocrinus uresi Ureš - Le Menn - Hladil, 1999		HL23
Grisetocrinus uresi Ureš - Le Menn - Hladil, 1999	Ureš et al. (1999), Pl. 1, fig. 5	HL4
Grisetocrinus uresi Ureš - Le Menn - Hladil, 1999	Ureš et al. (1999), Pl. 1, fig. 9	HL8
Grisetocrinus uresi Ureš - Le Menn - Hladil, 1999	Ureš et al. (1999), Pl. 1, fig. 8	HL7
Grisetocrinus uresi Ureš - Le Menn - Hladil, 1999		HL15
Grisetocrinus uresi Ureš - Le Menn - Hladil, 1999		HL19
Grisetocrinus uresi Ureš - Le Menn - Hladil, 1999	Ureš et al. (1999), Pl. 1, fig. 1-2	HL1
Grisetocrinus uresi Ureš - Le Menn - Hladil, 1999		HL20
Grisetocrinus uresi Ureš - Le Menn - Hladil, 1999	Ureš et al. (1999): Pl. 1, fig. 4	HL3
Grisetocrinus uresi Ureš - Le Menn - Hladil, 1999		HL18
Grisetocrinus uresi Ureš - Le Menn - Hladil, 1999		HL13
Grisetocrinus uresi Ureš - Le Menn - Hladil, 1999		HL10
Grisetocrinus uresi Ureš - Le Menn - Hladil, 1999	Ureš et al. (1999), Pl. 1, fig. 3	HL2
Grisetocrinus uresi Ureš - Le Menn - Hladil, 1999		HL21
Grisetocrinus uresi Ureš - Le Menn - Hladil, 1999	Ureš et al. (1999), Pl. 1, fig. 6	HL5
Grisetocrinus uresi Ureš - Le Menn - Hladil, 1999		HL17
Grisetocrinus uresi Ureš - Le Menn - Hladil, 1999		HL12

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