Lilamna

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Lilamna
Temporal range: late Eocene?(possibly Cretaceous)
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Lilamna tooth.png
Drawing of the holotype tooth
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Subclass: Elasmobranchii
Subdivision: Selachimorpha
Order: Lamniformes
Family: Pseudoscapanorhynchidae
Genus: Lilamna
Greenfield, 2021
Type species
Lilamna apophysata
(Li, 1997)
Synonyms

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]

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References

  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.
  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.
  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.