Pristiophorus borealis

Reinecke, Pollerspöck, Motomura, Bracher, Dufraing, Güthner & Von Der Hocht, 2020


Classification: Elasmobranchii Pristiophoriformes Pristiophoridae

Reference of the original description
Reinecke, T. & Pollerspöck, J. & Motomura, H. & Bracher, H. & Dufraing, L. & Güthner, T. & von der Hocht, F. (2020)
Sawsharks (Pristiophoriformes, Pristiophoridae) in the Oligocene and Neogene of Europe and their relationships with extant species based on teeth and rostral denticles. Palaeontos, 33, 57‒163

Types
Pristiophorus borealis
Holotype: SMF.: P10651; Paratype: SMF.: P10653; SMF.: P10653; SMF.: P10654; SMF.: P10655; SMF.: P10656; SMF.: P10657; SMF.: P10658;

Images of types

Description:


Citation: Pristiophorus borealis Reinecke, Pollerspöck, Motomura, Bracher, Dufraing, Güthner & Von Der Hocht, 2020: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 02/2023

Please send your images of "Pristiophorus borealis" to info@shark-references.com

Pristiophorus borealis Reinecke, Pollerspöck, Motomura, Bracher, Dufraing, Güthner & Von Der Hocht, 2020; Sülstorf Formation, Kobrow, near Sternberg, Mecklenburg-Vorpommern, Germany, holotype, SMF P10652 © Thomas Reinecke, Bochum

Distribution Geographic
Germany: Kobrow; Krefeld-Forstwald; Johannistal; Groß Pampau; Vierth; Dummersdorf; Mazerath; Bracht

Distribution Strategraphy
Late Oligocene, Chattian: Sülstorf Formation; Grafenberg Formation; Chatt-Schluffe (Chattian Silt), NP 25; Ratzeburg Formation;
Early Miocene, Aquitanian to early Burdigalian: Lower Mica Finesand (= Vierlande Finesand); Kakert Member, Breda Formation

Description
Original diagnose after Reinecke et al. (2020) p. 104 [29177]: Medium-sized pristiophorid teeth, up to 1.7 mm wide and 1.5 mm high. Dental pattern gradient heterodont. Teeth in supposedly anteriormost files with erect central cusp and moderately wide, subhorizontal heels. Labial crown face very convex, smooth, lacking a vertical axial ridge; apron very weak; ornamentation (tubercles, folds) on basal labial and laterolingual crown faces absent or weak; mesial/distal cutting edges at central cusp and on heels indistinct and discontinuous. Uvula conical, broad, and moderately long. Root mesio-distally extended and labio-lingually narrow; mesial/distal root lobes poorly separated and bent laterally. Few foramina on laterolingual root faces and on the axial depression of the labial root face. Teeth in lateral to lateroposterior files with erect or oblique, lower cusp and broad horizontal heels which may bear a low cusp let or hump. Labial crown face less convex, apron very weak or rarely more distinct than in anterior teeth. Cutting edges continuous from apex to lateral crown margins. Occasionally, short folds occurring at labial crown base and on laterolingual crown faces. Uvula medium-sized to short. Root triangular to laterally extended, anaulacorhize.

Remarks
valid after Reinecke et al. (2020) p. 104 [29177];


References
Reinecke, T. & Pollerspöck, J. & Motomura, H. & Bracher, H. & Dufraing, L. & Güthner, T. & von der Hocht, F. (2020)
Sawsharks (Pristiophoriformes, Pristiophoridae) in the Oligocene and Neogene of Europe and their relationships with extant species based on teeth and rostral denticles. Palaeontos, 33, 57‒163