PBDB Taxon

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

Cryptoclidus richardsoni

Reptilia - Plesiosauria - Cryptoclididae

Taxonomy

Cimoliosaurus richardsoni was named by Lydekker (1889). Its type specimen is BMNH R. 6696, a partial skeleton, and it is a 3D body fossil. Its type locality is Brick-field near Montevideo House, Chickerell, which is in a Callovian/Oxfordian marine horizon in the Oxford Clay Formation of the United Kingdom.

It was recombined as Cryptocleidus richardsoni by Delair (1960); it was recombined as Cryptoclidus richardsoni by Brown (1981).

Synonyms

Plesiosaurus plicatus was named by Mansel-Pleydell (1888). It is a 3D body fossil. Its type locality is Summertown, Wolvercote (OUM) (unspecific horizon of the Oxford Clay Formation, which is in a Callovian marine claystone in the Oxford Clay Formation of the United Kingdom.

It was synonymized subjectively with Cryptocleidus richardsoni by Delair (1960).

Synonymy list

Year	Name and author
1888	Plesiosaurus plicatus Mansel-Pleydell p. 40
1889	Cimoliosaurus richardsoni Lydekker p. 240 figs. 73, 74
1960	Cryptocleidus richardsoni Delair pp. 66-67
1981	Cryptoclidus richardsoni Brown p. 280 fig. 44b

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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	Cryptoclididae	Williston 1925
genus	Cryptoclidus	()
species	richardsoni	()

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.

†Cryptoclidus richardsoni Lydekker 1889

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Invalid names: Plesiosaurus plicatus Mansel-Pleydell 1888 [synonym]

Diagnosis

Reference	Diagnosis
D. S. Brown 1981	Member of the genus Cryptoclidus in which the distal anterior portion of the humerus is not greatly expanded; the radius has a concave anterior border, and the humeral facet is only slightly longer than the facet for the radiale; the ulna is approximately square.

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: base of the Callovian to the top of the Late/Upper Tithonian or 166.10000 to 145.00000 Ma

Collections (3 total)

Time interval	Ma	Country or state	Original ID and collection number
Callovian - Oxfordian	166.1 - 157.3	United Kingdom (England)	Cryptoclidus richardsoni (type locality: 98447)
Kimmeridgian - Early/Lower Tithonian	157.3 - 145.0	United Kingdom (England)	Cryptocleidus richardsoni (139861)
Late/Upper Tithonian	150.8 - 145.0	United Kingdom (England)	Cryptocleidus richardsoni (119505)