Fresnosaurus is an extinct genus of plesiosaur from the Late Cretaceous of what is now California. The type species is Fresnosaurus drescheri, first described by Welles in 1943. The generic name Fresnosaurus honors Fresno County, while the specific name honors Arthur Drescher.
Actinocamax is a genus of belemnite, an extinct group of cephalopods.
Aulacoceras is a genus of belemnite, an extinct group of cephalopods.
Aulacoteuthis is a genus of belemnite, an extinct group of cephalopods.
Belemnopsis is a genus of belemnite, an extinct group of cephalopods.
Calliconites is a genus of belemnite, an extinct group of cephalopods.
Chondroteuthis is a genus of belemnite, an extinct group of cephalopods.
Conoteuthis is a genus of belemnite, an extinct group of cephalopods.
Dimitobelus is a genus of belemnite, an extinct group of cephalopods.
Diplobelus is a genus of belemnite, an extinct group of cephalopods.
Hastites is a genus of belemnite, an extinct group of cephalopods.
Hibolites is a genus of belemnite, an extinct group of cephalopods.
Holcobelus is a genus of belemnite, an extinct group of cephalopods.
Neohibolites is a genus of belemnite, an extinct group of cephalopods.
Passaloteuthis is a genus of belemnite, an extinct group of cephalopods.
Permoteuthis is a genus of belemnite, an extinct group of cephalopods.
Produvalia is a genus of belemnite, an extinct group of cephalopods.
Belemnitida is an extinct order of squid-like cephalopods that existed from the Late Triassic to Late Cretaceous. Unlike squid, belemnites had an internal skeleton that made up the cone–from arms-most to tip: the tongue-shaped pro-ostracum, the conical phragmocone, and the pointy guard. The calcitic guard is the most common belemnite remain. Belemnites, in life, are thought to have had 10 hooked arms, a pair of fins on the guard. The chitinous hooks were usually no bigger than 5 mm (0.20 in), though a belemnite could have had between 100 and 800 hooks in total, using them to stab and hold onto prey.
Belemnites is a genus of an extinct group of cephalopods belonging to the order Belemnitida. These cephalopods existed in the Early Jurassic period from the Hettangian age to the Toarcian age (175.6–183.0). They were fast-moving nektonic carnivores.
