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Ichthyosaurus anningae
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
Year | Name and author |
---|---|
2015 | Ichthyosaurus anningae Lomax and Massare figs. 2-6,8 |
2016 | Ichthyosaurus anningae Ji et al. p. 12 |
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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