Lilamna

Lilamna; Temporal range: late Eocene?(possibly Cretaceous) PreꞒ Ꞓ O S D C P T J K Pg N ↓
	Drawing of the holotype tooth
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Division:	Selachii
Order:	Lamniformes
Family:	† Pseudoscapanorhynchidae
Genus:	† Lilamna ; Greenfield, 2021
Type species
	†Lilamna apophysata; (Li, 1997)
Synonyms
	Archaeolamna apophysata; Li, 1997 (preoccupied by Archaeolamna Siverson, 1992);

Last updated October 28, 2025

Lilamna is an extinct genus of mackerel sharks from the Wulagen Formation of the Tarim Basin, China. It was originally named Archaeolamna apophysata,^[1] but that generic name was preoccupied by Archaeolamna kopingensis .^[2]Lilamna was named as a replacement in accordance with the rules of the International Code of Zoological Nomenclature.^[3] Although formerly assigned to the family Lamnidae,^[1] it is now considered to be a potential member of the family Pseudoscapanorhynchidae.^[3] Since this family is otherwise restricted to the Cretaceous, it is possible that the holotype tooth was reworked into the late Eocene sediments it was found in.^[3]

References

1 2 Li, G. (1997). "Elasmobranchs from the lower Tertiary of the western Tarim Basin, China, and their biostratigraphic significance" (PDF). Palaeoworld. 7: 107–136.
↑ Siverson, M. (1992). "Biology, dental morphology and taxonomy of lamniform sharks from the Campanian of the Kristianstad Basin, Sweden" (PDF). Palaeontology. 35 (3): 519–554.
1 2 3 Greenfield, T. (2021). "Lilamna nom. nov., a new replacement name for Archaeolamna Li, 1997 (Chondrichthyes: Lamniformes: ?Pseudoscapanorhynchidae)". Zoosystematica Rossica. 30 (2): 213–214. doi:10.31610/zsr/2021.30.2.213. S2CID 241795349.

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[Li_1997-1] 1 2 Li, G. (1997). "Elasmobranchs from the lower Tertiary of the western Tarim Basin, China, and their biostratigraphic significance" (PDF). Palaeoworld. 7: 107–136.

[Siverson_1992-2] Siverson, M. (1992). "Biology, dental morphology and taxonomy of lamniform sharks from the Campanian of the Kristianstad Basin, Sweden" (PDF). Palaeontology. 35 (3): 519–554.

[Greenfield_2021-3] 1 2 3 Greenfield, T. (2021). "Lilamna nom. nov., a new replacement name for Archaeolamna Li, 1997 (Chondrichthyes: Lamniformes: ?Pseudoscapanorhynchidae)". Zoosystematica Rossica. 30 (2): 213–214. doi:10.31610/zsr/2021.30.2.213. S2CID 241795349.

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