The Eutaw Formation is a geological formation in North America , within the U.S. states of Alabama , Georgia , and Mississippi . The strata date from the late Coniacian to the early Santonian stage of the Late Cretaceous . It consists of the upper Tombigbee Sand Member and an unnamed lower member. Dinosaur , mosasaur , and pterosaur remains have been recovered from the Eutaw Formation.
4-966: Archaeolamna A. kopingensis Alabama A lamniform shark Borodinopristis B. schwimmeri Alabama A sclerorhynchid Brachyrhizodus B. mcnultyi Alabama Myliobatids B. wichitaensis Carcharias C . sp. Alabama A lamniform shark Cantioscyllium C. globidens Alabama Carpet sharks C. decipiens (= C. meyeri or C. saginatus? ) Chiloscyllium C. greeni Alabama A hemiscylliid Cretodus C. semiplicatus Alabama A lamniform shark Cretalamna C. appendiculata Alabama Otodontids C. serrata Cretoxyrhina C. mantelli Alabama A lamniform shark Edaphodon E . sp. Alabama A chimaera Heterodontus ? H . sp. Alabama A heterodontiform Hybodus H . sp. Archaeolamna Archaeolamna (from Greek arche which turned into archaeo and Lamna , an extinct shark genus)
8-515: A plesiosaur skeleton with bite marks from the Judith River Formation of Montana . It was a medium-sized shark with an estimated total body length of 3–4 metres (9.8–13.1 ft). Archaeolamna likely had an antitropical distribution , being found in the temperate waters of both hemispheres but absent from the tropical waters around the equator, much like the modern porbeagle shark . A similar distribution has been found for
12-602: Is an extinct genus of mackerel sharks that lived during the Cretaceous . It contains three valid species (one with two subspecies) which have been found in Europe , North America , and Australia . While it is mostly known from isolated teeth, an associated set of teeth, jaws, cranial fragments, and vertebrae of A. kopingensis is known from the Pierre Shale of Kansas . Teeth of A. k. judithensis were found with
16-404: The related Cardabiodon . When the family Archaeolamnidae was first named, it contained Archaeolamna , Cretodus , Dallasiella , and Telodontaspis . However, Cretodus was reassigned to Pseudoscapanorhynchidae , Dallasiella was reassigned to Lamniformes incertae sedis , and Telodontaspis was synonymized with Cretoxyrhina . This leaves Archaeolamna as the sole member of
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