Moerigaleus vitreodon

UNDERWOOD & WARD, 2011


Classification: Elasmobranchii Carcharhiniformes Hemigaleidae

Reference of the original description
UNDERWOOD, C.J. & WARD, D.J. (2011)
New hemigaleid shark from the late Eocene of Wadi Al-Hitan, Egypt. Journal of Vertebrate Paleontology, 31 (3): 707–711

Types
Moerigaleus vitreodon
Holotype: CGM: 60003;


Description:


Citation: Moerigaleus vitreodon UNDERWOOD & WARD, 2011: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 05/2021

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Description
Original diagnose after Underwood & Ward (2011) p. 707-708 [13073] [315]: Shark known only from isolated teeth. High degree of dignathic and monognathic heterodonty. Teeth small (<4 mm). All teeth with well-developed main cusp and at least some lateral cusps always present. Crown smooth; other than ornament of short, fine vertical ridges near base of labial side of some teeth. Cutting edge complete and reaches across all of crown in all teeth. Little crown overhang of root on labial face. Root strongly bilobate with wide nutritive groove, with central part of root somewhat displaced lingually giving concavity in central part of lower labial face of tooth. Anterior teeth higher than wide with erect main cusp, with one or two pairs of small lateral cusplets. Upper anterolateral teeth higher than wide or of similar dimentions, with erect main cusp and single small mesial cusplet with two to three small distal cusplets. Lateral teeth wider than high, with distally inclined main cusp and two to four distal cusplets. Mesial edge of main cusp strongly concave in lower teeth, relatively straight to sigmoidal in upper teeth.

Remarks
type species of Moerigaleus Underwood & Ward, 2011 p. 707 [13073] by original designation (Art. 68.2 ICZN);

valid after Underwood & Ward (2011) p. 707 [13073]

References
UNDERWOOD, C.J. & WARD, D.J. (2011)
New hemigaleid shark from the late Eocene of Wadi Al-Hitan, Egypt. Journal of Vertebrate Paleontology, 31 (3): 707–711
DOI: 10.1080/02724634.2011.563763