Romeriscus

Romeriscus is a dubious genus of tetrapod, currently classified as in the family Limnoscelidae, found in the Lower Pennsylvanian Port Hood formation in Nova Scotia.

Romeriscus is known by one species, Romeriscus periallus, from a single holotype, YPM-PU16 482. The holotype specimen has both cranial and post-cranial remains and consists of a badly crushed skull and 25 pre-sacral vertebrae.

It was originally described in 1967 by Baird & Carroll and hypothesized be a limnoscelid due to its skull structure. In 1992, however, this claim was refuted by Laurin & Reisz, who state that the poor preservation of the skull makes such a claim impossible, and that due to its poor condition, the frontal and postfrontal portions of the skull cannot be properly identified as a limnoscelid. Laurin & Reisz came to the conclusion that while Romeriscus is a distinct genus, it cannot conclusively be classified as amniota, or limnoscelidae, instead classifying it as tetrapoda incertae sedis, and nomen dubium, as its status as a Romeriid is unclear.