Original paper
New Janassid Petalodontiform (Chondrichthyes) teeth from the Late Carboniferous of Kansas, USA
Duffin, Christopher J.; Lauer, Bruce; Lauer, René
Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen Band 313 Heft 2 (2025), p. 215 - 232
37 references
published: Jan 30, 2025
published online: Jan 8, 2025
manuscript accepted: Dec 3, 2024
manuscript received: Oct 21, 2024
ArtNo. ESP155031302010, Price: 29.00 €
Abstract
An associated but not articulated group of 15 isolated janassid petalodontiform teeth, sampling the lower left and upper right parts of the dentition, is described from the marine Kasimovian (Upper Pennsylvanian, Late Carboniferous) Block Limestone Member (Cherryvale Shale Formation, Linn Subgroup, Kansas City Group) of Overland Park, Kansas City Metropolitan area, Johnson County, Kansas, USA. The teeth are described and allocated to Batillodus beaveri gen. et sp. nov. The teeth of this taxon are the largest of any known janassid, measuring up to 70 mm high. The dentition exhibits strong dignathic heterodonty. Lower teeth possess relatively long roots and crowns which are longer than wide with smooth, non-cuspidate cutting edges. Upper teeth have relatively short roots, crowns which are wider than they are high and a relatively large central trough. Upper symphyseal teeth possess multicuspidate cutting edges to the crown. Zoobank paper registration: urn:lsid:zoobank.org:pub:DA17921D-E46B-491E-99AD-35769A146DAC
Keywords
Chondrichthyes • Petalodontiformes • Janassidae • new genus • new species • Pennsylvanian • USA