Revision of Acheilus and Theodenisia (Late Cambrian, Trilobita)
- 1 January 1986
- journal article
- research article
- Published by Cambridge University Press (CUP) in Journal of Paleontology
- Vol. 60 (1) , 61-67
- https://doi.org/10.1017/s002233600002151x
Abstract
Acheilus Clark, 1924, is a kingstoniid trilobite, not a catillicephalid or an unrecognizable genus as previously thought. The catillicephalid Theodenisia Clark, 1948, is here restricted to those species in which the axial furrows terminate at the 4s furrow and which lack a preglabellar furrow. Peracheilus n. gen. is proposed as a replacement name for the catillicephalid Acheilus Raymond, 1924. It includes those species previously assigned to Theodenisia in which the axial furrows continue past the 4s furrow to join a narrow preglabellar furrow. Acheilus, Theodenisia, and Peracheilus occur in the Late Sunwaptan of North America; Theodenisia also occurs in the early Ibexian.This publication has 1 reference indexed in Scilit:
- Three new Upper Cambrian stages for North AmericaGeology, 1985