Passaloteuthis

Passaloteuthis; Temporal range: Pliensbachian-Toarcian183.7–175.6 Ma PreꞒ Ꞓ O S D C P T J K Pg N
	Passaloteuthis auricipitis guards from the Lower Lias strata, Gloucestershire, England
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Order:	†Belemnitida
Family:	†Passaloteuthididae
Genus:	†Passaloteuthis; Lissajous, 1915

Passaloteuthis is a genus of belemnite, an extinct group of cephalopods.^[1] Belemnites are typically known for having about 40 micro-hooks on each one of its appendage. However, Passaloteuthis is notable for being associated with a pair of mega-hooks known as onychites. These hooks are tentatively interpreted as male-specific features, though their exact function is still unknown.^[2]

Full-color reconstruction of *Passaloteuthis* with mega-hooks tentatively attached to the arm crown.

References

^ Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Cephalopoda entry)". Bulletins of American Paleontology. 364: 560. Retrieved 2009-04-10.
^ Hoffmann, René; Stevens, Kevin (February 2020). "The palaeobiology of belemnites – foundation for the interpretation of rostrum geochemistry". Biological Reviews. 95 (1): 94–123. doi:10.1111/brv.12557. ISSN 1464-7931. PMID 31729839.

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[1] Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Cephalopoda entry)". Bulletins of American Paleontology. 364: 560. Retrieved 2009-04-10.

[2] Hoffmann, René; Stevens, Kevin (February 2020). "The palaeobiology of belemnites – foundation for the interpretation of rostrum geochemistry". Biological Reviews. 95 (1): 94–123. doi:10.1111/brv.12557. ISSN 1464-7931. PMID 31729839.

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See also

References