- 1126/science.adl4540. PMID 38935712. McMenamin, Mark (January 2002). "The
ptychoparioid trilobite Skehanos gen. nov. from the
Middle Cambrian of
Avalonian M****achusetts...
- COTTON, T. J. (2001). "The
Phylogeny and
Systematics of
Blind Cambrian Ptychoparioid Trilobites". Palaeontology. 44 (1). Wiley: 167–207. Bibcode:2001Palgy...
-
Geological Survey Bulletin 10, 289-355 McMenamin, M.A.S. (2002). "The
ptychoparioid trilobite Skehanos gen. nov. from the
Middle Cambrian of
Avalonian M****achusetts...
- COTTON, T. J. 2001. 'The
phylogeny and
systematics of
blind Cambrian Ptychoparioid trilobites. Palaeontology, Vol. 44, Part 1, pp. 167 - 207, 4 pls. "Bailiaspis"...
- 2022.01.008. S2CID 246513780. Sundberg, F. A.; Webster, M. (2022). ""
Ptychoparioid"
trilobites of the
Harkless Formation and Mule
Spring Limestone (Cambrian...
