Abstract
Herein, a rich selachian assemblage from the middle Campanian Bladen Formation located near Elizabethtown, Bladen County, North Carolina, USA is described. This assemblage consists of 19 species from 18 genera, at least 14 families, and seven orders and introduces the new species Cantioscyllium clementsi sp. nov. The recovered six lamniforms and Squatina, Plicatoscyllium, and Igdabatis spp. had large cosmopolitan distributions, whereas the new ginglymostomatid species and remaining 10 hybodontid and batoid taxa were likely endemic to the waters of North America.
Highlights
Deposits along the Atlantic and Gulf coastal plains of North America are a rich source of Late Cretaceous euselachian fossil dentitions (e.g., Cappetta and Case 1975; Lauginiger 1984; Case and Schwimmer 1988; Case 1991; Becker et al 1998; Cicimurri 2007; Case et al 2017)
D. commercensis), not previously reported, can be added to the euselachian faunal composition associated with the Bladen Formation
The species identified as Protolamna borodini and Cretalamna sp. were likely cosmopolitan
Summary
Deposits along the Atlantic and Gulf coastal plains of North America are a rich source of Late Cretaceous euselachian fossil dentitions (e.g., Cappetta and Case 1975; Lauginiger 1984; Case and Schwimmer 1988; Case 1991; Becker et al 1998; Cicimurri 2007; Case et al 2017). The Bladen Formation of North Carolina has produced a relatively diverse shark and ray fauna. This formation represents a delta-shelf system (Sohl and Owens 1991) and is middle Campanian in age based on palynological analysis (Prowell et al 2003). Crane (2011) reported numerous species belonging to at least 17 euselachian genera, and Case et al (2012) described the rostral spines of the sclerorhynchid sawfish Borodinopristis shannoni from this formation. The Borodinopristis material was part of a larger euselachian assemblage that was collected at that time (Case et al 2012).
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