Trilobita - Ptychopariida - Menomoniidae
Synonyms: Apedopyanus Raymond 1937, Deissella Howell and Duncan 1939, Deltophthalamus Resser 1938, Howellaspis Lochmann and Denson 1944, Hysteropleura Raymond 1937
Parent taxon: Menomoniidae according to P. A. Jell and J. M. Adrain 2002
See also Palmer 1954, Robison 1964, Sepkoski 2002 and Stitt 1998
Sister taxa: Ampullatocephalina, Balderia, Biaverta, Bridgeia, Coenaspis, Dresbachia, Knechtelia, Menomonia, Nephalicephalus, Paramenomonia, Tavsenia, Verditerrina
Subtaxa: Bolaspidella contracta Bolaspidella convexa Bolaspidella housensis Bolaspidella prooculis Bolaspidella stymacantha
Type: Ptychoparia housensis
Ecology: fast-moving low-level epifaunal suspension feeder
Distribution:
• Cambrian of Canada (1: Yukon collection), Greenland (6), India (1), United States (37: Alaska, Idaho/ Utah, New York, South Dakota, Texas, Utah, Vermont, Wyoming)
Total: 45 collections including 55 occurrences
Specimen images are retrieved through the ePANDDA API.
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