Microetmopterus wardi

Siverson, 1993


Classification: Elasmobranchii Squaliformes Etmopteridae

Reference of the original description
Siversson, M. (1993)
Maastrichtian Squaloid Sharks from Southern Sweden. Palaeontology, 36(1), 1–19

Types
Microetmopterus wardi



Description:


Citation: Microetmopterus wardi Siverson, 1993: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 10/2024

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Description
Original diagnose after Siverson (1993) p. 10 [2213]: Upper jaw teeth with very large lateral cusplets, reaching half the height or more of cusp. Labial face of crown very flat, without ornamentation. Flat, V-shaped basal face of root with two axial foramina or with infundibulum. Rectangular lower jaw teeth longer than high. Separate axial foramina; occasionally forming infundibulum. No disto-lingual foramen. Interlocking hollows poorly developed, especially in juveniles.

Remarks
shark-references Species-ID=3706;
type species of Microetmopterus Siverson, 1993 p. 10 [2213] by original designation (Art. 68.2 ICZN);

valid after Siverson (1993) p. 10 [2213];

References
Guinot, G. & Condamine, F.L. (2023)
Global impact and selectivity of the Cretaceous-Paleogene mass extinction among sharks, skates, and rays. Science, 379, 802–806
DOI: 10.1126/science.abn2080
Flammensbeck, C.K. & Pollerspöck, J. & Schedel, F.D.B. & Matzke, N.J. & Straube, N. (2018)
Of teeth and trees: A fossil tip-dating approach to infer divergence times of extinct and extant squaliform sharks. Zoologica Scripta, 47(5), 539–557
DOI: 10.1111/zsc.12299
Klug, S. & Kriwet, J. (2010)
Timing of deep-sea adaptation in dogfish sharks: insights from a supertree of extinct and extant taxa. Zoologica Scripta, 39(4), 331–342
DOI: 10.1111/j.1463-6409.2010.00427.x
Kriwet, J. & Klug, S. (2009)
Fossil record and origin of squaliform sharks (Chondrichthyes, Neoselachii). In Gallucci, V.F. & McFarlane, G.A. & Bargmann, G.G. (Eds). Biology and management of dogfish sharks. American Fisheries Society. Bethesda, Maryland: 19–38
Siversson, M. (1993)
Late Cretaceous and Danian neoselachians from southern Sweden. Lund Publications in Geology, 110, 1–28
Siversson, M. (1993)
Maastrichtian Squaloid Sharks from Southern Sweden. Palaeontology, 36(1), 1–19