Pseudocorax is an Upper Cretaceous (Turonian to Maastrichtian) genus known from the sediments of Western Europe, North Africa and North America. Species ascribed to this genus include:
P. affinis (AGASSIZ 1843) serrate cutting edge, Maastrichtian of Western Europe & Morocco
P. granti CAPPETTA & CASE 1975 Coniacian - Campanian Texas and Santonian of Kansas
P. laevis (LERICHE 1906) Turonian & Campanian Western Europe and Turonian Western Europe & Alabama. Stewart (1990) and others reported this species from the Smoky Hill Chalk.
In general, the teeth have strongly bilobate roots and a deep nutrient groove. The cusp is thin, elongated and overhangs the root with a distinct labial bulge. Anterior teeth are mesio-distally compressed with relatively erect cusps. Distally, the teeth elongate and the cusp becomes more inclined. The distal heel is separated from the main cusp by a notch and may be flat, rounded or pointed (cusplet-like) depending on species and file position. In P. laevis, the mesial heel is also clearly differentiated from the cusp. The cutting-edge may be serrate or smooth, depending on species.
Some recent/relevant reports of this genus in North America include:
Appelgate (1970:395) - P. affinis from the Campanian of Alabama.
Cappetta & Case (1975: 304-05, fig 1) - P. granti nov. sp. from the Campanian of Texas.
Lauginger & Hartstein (1983: 7) - P. granti from the Marshalltown (M. Camp.) & Mount Laural (L. Camp) Formations of Delaware.
Case & Schwimmer (1988) reported P. affinis from the Blufftown Formation (Campanian) of Western Georgia.
Case (1991) - P. granti from the Coffee Sand (?Middle Campanian) of Mississippi.
Welton & Farish (1993: 123 fig 1-3) P. granti from the Coniacian-Campanian of Texas.
Case & Cappetta (1997: 139-40, pl 3.3-4) P. granti from the Maastrichtian of Texas.
Cappetta & Case (1999) included P. granti (pg 16 pl 8 1-4) from the Campanian and P aff granti ( pg 16, pl 8 5-11) from the Turonian-Coniacian of Texas.
Hamm (2001) in his abstract included teeth from the Smoky Hill Chalk (Upper Cretaceous) of western Kansas as Pseudocorax laevis.
Case & Cappetta (2004: 9-10) reported P. aff. affinis from the Early Maastrichtian of New Jersey.
Shimada & Fielitz (2006: 196) include as Pseudocorax laevis, teeth from the Smoky Hill Chalk, Niobrara Fm.of Kansas.
Hamm & Shimada (2007) synonymized North American teeth attributed to P granti and P. affinis) with P. laevis. The underlying reasoning for this determination was not clearly argued; commenting only that the Leriche (1906) text description of P. laevis applied to the Smoky Hill Chalk teeth and that the latter were indistinguishable from Texas material. They made no mention of comparing their teeth with specimens from the type locale or compiling representative tooth-positions as a comparative benchmark. Cappetta would certainly be familiar with P. laevis and a substantive argument-set would need to be constructed to challenge P. granti. The accompanying Texas teeth (figures - ) do appear to differ from the P. laevis teeth illustrated in Herman (1977: plate IV, fig 4). Hamm & Shimada might prove correct in their ascertains, but a more substantial set of arguments is most certainly required.
Hamm & Cicimurri (2011) included Pseudocorax laevis in the Atco Formation (Early Coniacian) of Texas.
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Hamm, S.A. and D.J. Cicimurri, 2011. Early Coniacian (Late Cretaceous) selachian fauna from the basal Atco Formation, Lower Austin Group, north central Texas; Paludicola [Rochester Institute of Vertebrate Paleontology] 8(3):107-127.
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