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]

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:	†PassaloteuthisLissajous, 1915 See also edit Belemnite List of belemnites References edit ^ 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.