Pentremite

Pen´tre`mite


n.1.(Zool.) Any species of Pentremites.
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Though the locality that the fossils were collected from was previously described as part of the Keokuk Formation (Spreng and Howe, 1963), the presence of Pentremites conoideus indicates that this locality is the Warsaw Formation (Waters et al.
The Echinodermata are represented by a number of groups: Crinoidea, represented by articulated calyxes and disarticulated columnals and brachials; Blastoidea, represented by columnals and calyxes, especially those of Pentremites conoideus; Echinoidea, represented by disarticulated interambulacral plates as well as several largely intact specimens; and Asteroidea, represented by one nearly complete specimen, as well as disarticulated dorsal plates from the same species.
Ontogeny and phylogeny of the Carboniferous blastoid Pentremites.