Alternative combination: Syspacephalus obscurus
Full reference: A. R. Palmer and R. B. Halley. 1979. Physical Stratigraphy and Trilobite Biostratigraphy of the Carrara Formation (Lower and Middle Cambrian) in the Southern Great Basin. United States Geological Survey Professional Paper 1047:1-131
Belongs to Mexicella according to F. A. Sundberg 2004
See also Palmer and Halley 1979
Sister taxa: Mexicella antelopea, Mexicella grandoculus, Mexicella granulata, Mexicella mexicana, Mexicella robusta, Mexicella stator
Type specimen: Its type locality is Grapevine Mountains (USGS 4140-CO), which is in a Delamaran shallow subtidal mudstone/limestone in the Carrara Formation of California
Distribution:
• Delamaran of United States (2: California 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.