Trilobita - Proetida - Hystricuridae
Alternative combination: Hyperbolochilus marginauctum
Full reference: R. J., J.r. Ross. 1951. Stratigraphy of the Garden City Formation in northeastern Utah, and its trilobite faunas. Yale Peabody Museum of Natural History Bulletin 6:1-161
Belongs to Hillyardina according to W. D. Boyce 1989
See also Ross 1951
Sister taxa: Hillyardina levis, Hillyardina minuspustulata, Hillyardina semicylindrica, Hillyardina tasmaniensis
Type specimen: YPM 18057, a cephalon/head (cranidium). Its type locality is Locality 6, Hillyard's Canyon, Zone "F", which is in a Stairsian shallow subtidal horizon in the Garden City Formation of Idaho.
Ecology: fast-moving low-level epifaunal deposit feeder
Distribution:
• Ordovician of United States (2: Idaho, Utah collections)
Total: 2 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.