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1 July 2005 PENNSYLVANIAN (LATE CARBONIFEROUS) ECHINOIDS FROM THE WINCHELL FORMATION, NORTH-CENTRAL TEXAS, USA
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Abstract

A new genus and three new species of echinoids occur in several horizons of an echinoderm Lagerstätten in the Winchell Formation of north-central Texas. This occurrence is dominated by several thousand specimens of Archaeocidaris brownwoodensis new species, a medium-sized archaeocidarid with long, triangular, ornate spines. Another rare archaeocidarid, Archaeocidaris apheles n. sp., is a small, smooth-spined species. The second most abundant echinoid is Elliptechinus kiwiaster n. gen. and sp., an unusual elliptical lepidocentrid, which extends the range of lepidocentrids into the Pennsylvanian (Late Carboniferous). A fourth echinoid, an unidentified echinocystitid, is known from one disarticulated specimen and appears to be mostly composed of ambulacral plates of varying shape and size.

CHRIS L. SCHNEIDER, JAMES SPRINKLE, and DAN RYDER "PENNSYLVANIAN (LATE CARBONIFEROUS) ECHINOIDS FROM THE WINCHELL FORMATION, NORTH-CENTRAL TEXAS, USA," Journal of Paleontology 79(4), (1 July 2005). https://doi.org/10.1666/0022-3360(2005)079[0745:PLCEFT]2.0.CO;2
Accepted: 1 June 2004; Published: 1 July 2005
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