Neoselachian remains (Chondrichthyes, Elasmobranchii) from the Middle Jurassic of SW Germany and NW Poland Author Kriwet, Jürgen text Acta Palaeontologica Polonica 2003 2003-11-30 48 4 583 594 journal article 10.5281/zenodo.13392170 1732-2421 13392170 A40C8EB5-8246-4B2D-9050-267525441F87 Genus Protospinax Woodward, 1919 Type species : Protospinax annectans Woodward, 1919 from the Upper Jurassic of southern Germany .