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Pesciarichthys baldwinae Sorbini & Tyler, 1998 was redescribed in 2012 by Bannikov & Tyler and the new genus Frigosorbinia established. Taxonomy from Fossilworks.org. Diagnosis from Bannikov and Tyler 1998, p. 27:" Body a deep ovoid in shape; head relatively small. Mouth small; teeth relatively small and lobate. Five branchiostegal rays. Vertebrae 22 (9 + 13); haemal spines of first two caudal vertebrae slender, oriented posteroventrally, and not in close proximity in their middle regions. Tenth caudal vertebra with elongate slender neural and haemal spines. One supraneural. Dorsal fin with eight spines and 23 soft rays. Both first dorsal-fin spine and first anal-fin spine protrude to exterior. Anal fin with three spines and 21 soft rays. Tenth interneural space with two basal pterygiophores; 11th space with one basal pterygiophore. First interhaemal space with two basal pterygiophores. Pelvic bone with relatively shallow subpelvic keel (12% of pelvic length). Scales very small over most of body and head. Each scale consists of a small basal plate with upright spinules. Larger rounded scale plates scattered posteriorly on body in region of caudal peduncle; these larger scales are densely spaced together and slightly more than twice the size of the small body scales elsewhere. Caudal peduncle with three moderate, fixed, keeled bony scutes." Line drawing from Sorbini & Tyler 1998, p. 25 : Identified by oilshale using Sorbini & Tyler 1998. References: Sorbini L. and Tyler, J. C. (1998) A new species of the Eocene surgeon fish genus Pesciarichthys from Monte Bolca, Italy, with comments on caudal penduncle armature and supraneurals in acanthurids. Studi e ricerche sui giacimenti terziari di Bolca 7:21-34. Bannikov. A. & Tyler, J.C. (2012): REDESCRIPTION OF THE EOCENE OF MONTE BOLCA, ITALY, SURGEON FISH PESCIARICHTHYS PUNCTATUS PERCIFORMES, ACANTHURIDAE, AND A NEW GENUS, FRIGOSORBINIA, FOR P. BALDWINAE. Studi e ricerche sui giacimenti terziari di bolca, XIV - Miscellanea Paleontologica, 11, 2012.