Trilobita - Ptychopariida - Catillicephalidae
Synonym: Acheilus Clark 1924 [replaced name]
Full reference: R. Ludvigsen. 1986. Revision of Acheilus and Theodenisia (Late Cambrian, Trilobita). Journal of Paleontology 60(1):61-67
Parent taxon: Catillicephalidae according to P. A. Jell and J. M. Adrain 2002
See also Sepkoski 2002
Sister taxa: Acheilops, Buttsia, Calculites, Catillicephala, Cryptoderaspis, Distazeris, Galeaspis, Lajishanaspis, Madarocephalus, Matania, Onchonotellus, Onchonotopsis, Onchonotus, Pemphigaspis, Theodenisia, Theodensia, Triarthropsis, Tumidulaspis, Tuojiangella, Urbanaspis, Welleraspis, Yukonaspis
Subtaxa: Acheilus brevis Acheilus communis Acheilus depressus Acheilus gibbus Acheilus latus Acheilus levisensis Acheilus limbatus Acheilus monile Acheilus oryx Peracheilus marcoui Peracheilus spinosus
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Cambrian of Canada (18: Alberta, Newfoundland and Labrador, Quebec collections), United States (1: Vermont)
Total: 19 collections including 26 occurrences
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.