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Ichthyosaurus anningae

Reptilia - Ichthyosauridae

Taxonomy
Ichthyosaurus anningae was named by Lomax and Massare (2015) [Diagnosis—Total length to tail bend probably less than 1.5 m (comparable in length to I. breviceps and I. conybeari, but smaller than I. communis); long, fairly robust snout and mandible, snout ratio 0.60 or more, but probably <0.65 (longer than I. breviceps, within the range of I. communis, but shorter than I. conybeari); »43 presacral centra (>41 in I. communis, 42–43 in I. breviceps, <42 in I. conybeari; McGowan and Motani, 2003); »74 preflexural centra (75–79 in I. communis, >74 in I. conybeari, and <74 in I. breviceps; McGowan and Motani, 2003). Autapomorphic characters: short, robust humerus with prominent deltopectoral crest much larger than the dorsal process, and covering more than half the length of the shaft; anterior edge of humerus shaft much shorter than posterior in ventral view; circular depression on the articular surface anterior to the dorsal process of humerus; dorsoventral constriction in the humeral head; humerus length more than 1.7 times the length of the femur; femur almost as wide proximally as distally with a relatively short shaft (femur is much wider distally than proximally in all other Ichthyosaurus species).]. Its type specimen is DONMG:1983.98, a partial skeleton (incomplete skeleton comprising the skull, pectoral girdle, two humeri, anterior trunk, and scattered portions of the posterior skeleton, including two femora an), and it is a 3D body fossil. Its type locality is Charmouth area, Ichthyosaurus anningae type locality, which is in a Pliensbachian carbonate marl/mudstone in the Charmouth Mudstone Formation of the United Kingdom.

Synonymy list
YearName and author
2015Ichthyosaurus anningae Lomax and Massare figs. 2-6,8
2016Ichthyosaurus anningae Ji et al. p. 12

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
RankNameAuthor
Amniota
Sauropsida
classReptilia
subclassEureptilia()
Romeriida
Diapsida()
Ichthyosauromorpha
Ichthyosauriformes
Ichthyopterygia(Owen 1840)
Eoichthyosauria
Ichthyosauria(de Blainville 1835)
Thunnosauria
familyIchthyosauridaeBonaparte 1841
genusIchthyosaurusKoenig 1818
speciesanningae

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.

Ichthyosaurus anningae Lomax and Massare 2015
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: hydroxyapatiteo
Environment: marineo
Locomotion: actively mobileo
Life habit: nektonico
Diet: carnivoreo
Reproduction: viviparouso
Created: 2009-07-20 06:07:40
Modified: 2010-02-23 00:20:57
Source: o = order
Reference: Kiessling 2004

Age range: Early/Lower Pliensbachian or 189.60000 to 183.00000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Early/Lower Pliensbachian189.6 - 183.0United Kingdom (England) Ichthyosaurus anningae (type locality: 176440)