PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Edgarosaurus

Reptilia - Plesiosauria - Polycotylidae

Taxonomy

Edgarosaurus was named by Druckenmiller (2002). Its type is Edgarosaurus muddi.

It was assigned to Cryptocleidoidea by Otero et al. (2012); and to Polycotylidae by Druckenmiller (2002), Ketchum and Benson (2010) and Benson and Druckenmiller (2014).

Species

E. muddi (type species)

Synonymy list

Year	Name and author
2002	Edgarosaurus Druckenmiller p. 30
2010	Edgarosaurus Ketchum and Benson p. 15
2012	Edgarosaurus Otero et al.
2014	Edgarosaurus Benson and Druckenmiller figs. 2-3

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria

Rank	Name	Author
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
—	Sauropsida
class	Reptilia
subclass	Eureptilia	()
—	Romeriida
—	Diapsida	()
suborder	Sauropterygia
order	Plesiosauria	de Blainville 1835
superfamily	Plesiosauroidea	Welles 1943
family	Polycotylidae	Williston 1908
genus	Edgarosaurus

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

G. †Edgarosaurus Druckenmiller 2002

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†Edgarosaurus muddi Druckenmiller 2002

Diagnosis

Reference	Diagnosis
P. S. Druckenmiller 2002	Moderately sized (approximately 3.5 m in length), short-necked plesiosaur possessing the following suite of characters: pineal foramen present (absent in Dolichorhynchops and Trinacromerum); fenestra ovalis present (absent in Dolichorhynchops); suspensorium vertically oriented (angled posteriorly in Plesiopleurodon and Dolichorhynchops); six to seven premaxillary teeth (commonly five to six in Dolichorhynchops, five in Trinacromerum bonneri); caniniform teeth present (absent in Dolichorhynchops and Trinacromerum); relatively short mandibular symphysis bearing six pairs of dentary teeth (eight in Plesiopleurodon, 18–20 in Dolichorhynchops); 26 cervical vertebrae (19 in Dolichorhynchops, 20 in Trinacromerum); forelimb phalangeal formula 7-11-10-9-9.

Measurements

No measurements are available

Composition:

hydroxyapatiteo

Environment:

marineo

Locomotion:

actively mobileo

Life habit:

aquatico

Depth habitat:

surfaceo

Diet:

carnivoreo

Reproduction:

viviparouso

Created:

2009-07-20 06:05:48

Modified:

2011-08-12 01:58:15

Source: o = order

Reference: Kiessling 2004

Age range: Late/Upper Albian or 105.30000 to 99.60000 Ma

Collections: one only

Time interval	Ma	Country or state	Original ID and collection number
Late/Upper Albian	105.3 - 99.6	USA (Montana)	E. muddi (97885)