Protospinax

Protospinax; Temporal range: Late Jurassic PreꞒ Ꞓ O S D C P T J K Pg N
	Protospinax annectens
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Superorder:	Hypnosqualea
Family:	incertae sedis
Genus:	Protospinax; Woodward, 1919

Protospinax is an extinct genus of cartilaginous fish found in the Solnhofen limestones of southern Bavaria. It is a difficult taxon to accommodate in taxonomies. Formerly known from only two specimens, further museum specimens were discovered at the Museum of Comparative Zoology of Harvard University in the 1990s, having been misidentified as Squatina and Heterodontus.

Protospinax was about 1.7 m in length.[1]

References

Marcelo R. de Carvalho & John G. Maisey (1996). "Phylogenetic relationships of the Late Jurassic shark Protospinax Woodward 1919 (Chondrichthyes: Elasmobranchii)" (PDF). In G. Arratia & G. Viohl (ed.). Mesozoic Fishes – Systematics and Paleoecology (PDF excerpt) |format= requires |url= (help). München, Germany: Friedrich Pfeil. pp. 9–46. ISBN 3-923871-90-2.

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