Aquilolamna milarcae

Vullo, Frey, Ifrim, González, Stinnesbeck & Stinnesbeck, 2021


Classification: Elasmobranchii Lamniformes Aquilolamnidae

Reference of the original description
Vullo, R. & Frey, E. & Ifrim, C. & González, M.A. & Stinnesbeck, E.S. & Stinnesbeck, W. (2021)
Manta-like planktivorous sharks in Late Cretaceous oceans. Science, 371(6535), 1253–1256

Types
Aquilolamna milarcae
Holotype: INAH: 2544 P.F.17;

Images of types

Description:


Citation: Aquilolamna milarcae Vullo, Frey, Ifrim, González, Stinnesbeck & Stinnesbeck, 2021: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 10/2021

Please send your images of "Aquilolamna milarcae" to info@shark-references.com

Aquilolamna milarcae VULLO, FREY, IFRIM, GONZÁLEZ, STINNESBECK & STINNESBECK, 2021, holotype, (INAH 2544 P.F.17), Vallecillo quarry area, Nuevo León State, Mexico © Wolfgang Stinnesbeck, Romain Vullo

Distribution Geographic
Mexico: Vallecillo quarry area, Nuevo León State [29456];

Distribution Strategraphy
Vallecillo Member of the Agua Nueva Formation, middle–upper Pseudaspidoceras flexuosum Zone, lower Turonian, Upper Cretaceous [29456]

Measurement
TL 166 cm [29456];

Material
one skeleton [29456];

Description
Original diagnose after Vullo et al. (2021) p. suppl. text p. 5 [29456]: Medium-sized neoselachian shark that differs from all other selachimorphs in having hypertrophied, scythe-shaped plesodic pectoral fins whose span exceeds the total length of the animal. High number (~70) of anteriorly directed pectoral radials. Head short and broad, with wide and near-terminal mouth. Caudal fin markedly heterocercal. Caudal fin skeleton showing a high hypochordal ray angle (i.e., ventrally directed hypochordal rays). Caudal tip slender with no (or strongly reduced?) terminal lobe. Squamation strongly reduced (or completely absent?).

Remarks
type species of Aquilolamna Vullo et al., 2021 p. suppl. text p. 5 [29456] by original designation (Art. 68.2 ICZN);

valid after Vullo et al. (2021) p. suppl. text p. 5 [29456];

Taxonomic remark after Vullo et al. (2021) [29456]: The family Aquilolamnidae (type and only known genus: Aquilolamna) possibly includes the enigmatic, poorly known Late Cretaceous genera Cretomanta (24) and Platylithophycus (27). Systematic and paleoecological assumptions combined with stratigraphic evidence (see main text) suggest that the tooth-based genus Cretomanta is a suitable candidate for being the dental elements of the skeleton-based genus Aquilolamna (for which teeth are unknown in the sole specimen available to date) and thus may be a senior synonym of the latter; however, both taxa must be considered distinct pending the discovery of overlapping material.

References
Vullo, R. & Frey, E. & Ifrim, C. & González, M.A. & Stinnesbeck, E.S. & Stinnesbeck, W. (2021)
Manta-like planktivorous sharks in Late Cretaceous oceans. Science, 371(6535), 1253–1256
DOI: 10.1126/science.abc1490
Ortega, R.P. (2021)
Ethical controversy swirls around shark fossil from Mexico. Science, 372(6540), 332–333
DOI: 10.1126/science.372.6540.332