echinoderm

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e·chi·no·derm

(e-kī'nō-derm),

A member of the phylum Echinodermata.

echinoderm

any member of the phylum Echinodermata, including the sea urchins, starfish, brittle-stars, sea cucumbers, feather stars and sea lillies. The phylum is characterized by a pentaradiate structure (a five-sided RADIAL SYMMETRY) and the presence of tube feet in most forms.

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Key words: Central Iran, Oligo-Miocene, Limestones, Echinoderms.

Paleontological study of the echinoderms in the Qom formation

1992; Hunt 1993) and reduced geographic range (Emlet 1995) in Patiriella and other echinoderms.

Molecular phylogenetic analysis of life-history evolution in asterinid starfish

Echinoderms have relatively simple nervous systems consisting of a pentaradially symmetrical nerve ring from which radiate five radial nerves, which in turn innervate the numerous tube feet and spines (Cobb, 1985).

Light-Dependent Electrical Activity in Sea Urchin Tube Feet Cells

The presence of reef forming organisms (bryozoans, foraminifers, echinoderms, and bivalves) support this model.

Depositional system and sequence stratigraphy of Permian Amb Formation, Salt Ranges, Northwest Pakistan

The nearly equal areas of the Utah hardground were covered by bryozoans and echinoderm holdfasts (Wilson et al.

Sparsely encrusted hardground in the Darriwilian calcareous sandstone of Cape Pakri, NW Estonia (Baltica)/Horedalt asustatud muistne tsementeerunud kihipind Pakri poolsaare Ordoviitsiumist

These cells stay in the body cavity, on the coelomic fluid present in the circulatory system of adults and larvae echinoderms. The coelomocytes mediate immune responses, performing phagocytosis and encapsulation of foreign particles, in conjunction with the release of antimicrobial molecules by degranulation (Smith et al.

Cloning and expression analysis of allograft inflammatory factor type 1 in coelomocytes of antarctic sea urchin (Sterechinus neumayeri)

Although rapid burial can happen by several processes, apparently storm deposition is the most common bottom-smothering process that commonly leads to complete preservation of crinoids and other echinoderms (Meyer and others 1989; Ausich 2001).

New cladid crinoid (phylum echinodermata) from the Middle Devonian Delaware Limestone, Franklin County, Ohio (1)

Echinoderms (sea stars, sea urchins, sand dollars, sea cucumbers, and sea lilies) have impressive regenerative abilities.

Getting a Head with Ptychodera flava Larval Regeneration

The reefs are embedded in an echinoderm grainstone, identical to those known from the Vasalemma and Rummu area.

The early Katian (Late Ordovician) reefs near Saku, northern Estonia and the age of the Saku Member, Vasalemma Formation

Ciliary bands in echinoderm larvae: Evidence for structural homologies and a common plan.

Why are there so many species of brooding Antarctic echinoids?

However, the lack of tracts of neurons along the ciliary bands is unexpected because neurons in these areas are considered to be ancestral features of echinoderm development (Burke, 2011).