Megaselachus

Megaselachus; Temporal range: Miocene PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Order:	Lamniformes
Family:	†Otodontidae
Genus:	†Megaselachus; Glyckman, 1964
Species:	†M. subauriculatus
Binomial name
	†Megaselachus subauriculatus; (Agassiz, 1839)
Other species
	†"M." crassus? (Costa, 1865 Non Neugeboren, 1850); †"M." polygyrus? (Morton, 1835);

Megaselachus is a possibly dubious extinct genus of otodontid shark. In the past, this particular genus has been used to house other otodontids, such as the famous megalodon. It is sometimes considered a subgenus of Otodus, or merged with other related genera such as Carcharocles.^[1] The genus lived during the Miocene. Only a single species can be confidentially placed in the genus, Megaselachus subauriculatus.

Description

Megaselachus teeth are moderately narrow. They also have a heavily serrated crown. The labial side is convex with a prominent triangular neck, while the lingual side is concave.^[2]

References

^ Shimada, Kenshu; Chandler, Richard E.; Lam, Otto Lok Tao; Tanaka, Takeshi; Ward, David J. (2017-07-04). "A new elusive otodontid shark (Lamniformes: Otodontidae) from the lower Miocene, and comments on the taxonomy of otodontid genera, including the 'megatoothed' clade". Historical Biology. 29 (5): 704–714. doi:10.1080/08912963.2016.1236795. ISSN 0891-2963.
^ Laurito, Cesar A.; Calvo, Cristian; Valerio, Ana L.; Calvo, Alejandro; Chacón, Rafael (2014-06-27). "Ictiofauna del Mioceno Inferior de la localidad de Pacuare de Tres Equis, Formación Río Banano, provincia de Cartago, Costa Rica, y descripción de un nuevo género y una nueva especie de Scaridae". Revista geológica de América central (in Spanish). 50: 153–192. doi:10.15517/rgac.v0i50.15121. ISSN 2215-261X.

[1] Shimada, Kenshu; Chandler, Richard E.; Lam, Otto Lok Tao; Tanaka, Takeshi; Ward, David J. (2017-07-04). "A new elusive otodontid shark (Lamniformes: Otodontidae) from the lower Miocene, and comments on the taxonomy of otodontid genera, including the 'megatoothed' clade". Historical Biology. 29 (5): 704–714. doi:10.1080/08912963.2016.1236795. ISSN 0891-2963.

[2] Laurito, Cesar A.; Calvo, Cristian; Valerio, Ana L.; Calvo, Alejandro; Chacón, Rafael (2014-06-27). "Ictiofauna del Mioceno Inferior de la localidad de Pacuare de Tres Equis, Formación Río Banano, provincia de Cartago, Costa Rica, y descripción de un nuevo género y una nueva especie de Scaridae". Revista geológica de América central (in Spanish). 50: 153–192. doi:10.15517/rgac.v0i50.15121. ISSN 2215-261X.

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