Teresodus amplexus

KOOT, CUNY, TINTORI & TWITCHETT, 2013


Classification: Elasmobranchii Hybodontiformes incert. fam.

Reference of the original description
KOOT, M.B. & CUNY, G. & TINTORI, A. & TWITCHETT, R.J. (2013)
A new diverse shark fauna from the Wordian (Middle Permian) Khuff Formation in the interior Haushi-Huqf area, Sultanate of Oman. Palaeontology, 56 (2): 303–343

Types
Teresodus amplexus
Holotype: MPUM: 10889; Paratype: MPUM: 10888; MPUM: 10890;


Description:


Citation: Teresodus amplexus KOOT, CUNY, TINTORI & TWITCHETT, 2013: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 06/2021

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Description
Original diagnose after Koot et al. (2013) p. 318-319 [18013]: Moderately heterodont dentition with asymmetrical lateral teeth, low crown profile and moderately incised crown–base junction. Main cusp low, smooth and lingually directed. Longitudinal crest present, as well as a circumferential rim at the crown shoulder, but crown surface generally smooth. Moderate lingual peg, surmounted by 2–4 weak vertical ridges. Labial crown face concave in anterior teeth, but convex laterally. Small labial peg present in (antero)lateral teeth, but may be absent in anterior teeth. Lingual flexure of mesial and distal crown extremities most pronounced in lateral teeth. One pair of lateral cusplets present in anterior teeth, but gradually weaker to absent in (antero)lateral teeth. Base with slight lingual protrusion. Anaulacorhize vascularization with few randomly located foramina and labially a row of small foramina near the crown–base junction. Basolabial sulcus always present.

Remarks
type species of Teresodus, Koot et al., 2013 p. 318 [18013] by original designation (Art. 68.2 ICZN);

valid after Koot et al. (2013) p. 319 [18013];


References
KOOT, M.B. & CUNY, G. & TINTORI, A. & TWITCHETT, R.J. (2013)
A new diverse shark fauna from the Wordian (Middle Permian) Khuff Formation in the interior Haushi-Huqf area, Sultanate of Oman. Palaeontology, 56 (2): 303–343
DOI: 10.1111/j.1475-4983.2012.01199.x
KOOT, M.B. (2013)
Effects of the late Permian mass extinction on chondrichthyan palaeobiodiversity and distribution patterns. Thesis, University of Plymouth