Petroxestes

Petroxestes
Petroxestes pera borings in an Upper Ordovician hardground (Waynesville Formation, southern Ohio).
Trace fossil classification
Ichnofamily:	† Rogerellidae
Ichnogenus:	† Petroxestes Wilson & Palmer, 1988
Type ichnospecies
Petroxestes pera Wilson & Palmer, 1988
Ichnospecies [1]
P. alteraJagt et al., 2009 P. peraWilson & Palmer, 1988

Petroxestes is a shallow, elongate boring (a type of trace fossil) originally found excavated in carbonate skeletons and hardgrounds of the Upper Ordovician of North America. ^{[2] [3]} These Ordovician borings were likely made by the mytilacean bivalve Corallidomus as it ground a shallow groove in the substrate to maintain its feeding position. ^[4] They are thus the earliest known bivalve borings. ^[5] Petroxestes was later described from the Lower Silurian of Anticosti Island (Canada). ^[6] and the Miocene of the Caribbean. ^[7]

References

1. Wisshak, M.; Knaust, D.; Bertling, M. (2019). "Bioerosion ichnotaxa: review and annotated list". Facies. 65 (2): 24. doi:10.1007/s10347-019-0561-8.
2. Wilson, M.A., Palmer, T.J. (1988). "Nomenclature of a bivalve boring from the Upper Ordovician of the midwestern United States". Journal of Paleontology. 62 (2): 306–308. doi:10.1017/S0022336000029978. S2CID   131394939.
3. Wilson, M.A., Palmer, T.J. (2006). "Patterns and processes in the Ordovician Bioerosion Revolution". Ichnos. 13 (3): 109–112. doi:10.1080/10420940600850505. S2CID   128831144.
4. Pojeta, J., Jr., Palmer, T.J. (1976). "The origin of rock boring in mytilacean pelecypods". Alcheringa. 1 (2): 167–179. doi:10.1080/03115517608619068.
5. Taylor, P.D., Wilson. M.A. (2003). "Palaeoecology and evolution of marine hard substrate communities". Earth-Science Reviews. 62 (1–2): 1–103. Bibcode:2003ESRv...62....1T. doi:10.1016/S0012-8252(02)00131-9.
6. Tapanila, L., Copper, P. (2002). "Endolithic trace fossils in Ordovician-Silurian corals and stromatoporoids, Anticosti Island, eastern Canada". Acta Geológica Hispánica. 37: 15–20.
7. Pickerill, R.D., Donovan, S.K., Portell, R.W. (2001). "The bioerosional ichnofossil Petroxestes pera Wilson and Palmer from the Middle Miocene of Carriacou, Lesser Antilles". Caribbean Journal of Science. 37: 130–131.