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Anningasaura lymense
Taxonomy
Anningasaura lymense was named by Vincent and Benson (2012). Its type specimen is BMNH 49202, a partial skeleton (an almost complete skull with mandibles in occlusion, with eight associated cervical vertebrae), and it is a 3D body fossil. Its type locality is Lyme Regis: Pinhay Bay (Lower Lias, general), which is in a Hettangian/Pliensbachian marine horizon in the United Kingdom. It is the type species of Anningasaura.
Synonymy list
| Year | Name and author |
|---|---|
| 2012 | Anningasaura lymense Vincent and Benson p. 1050 figs. 1-6 |
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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.
†Anningasaura lymense Vincent and Benson 2012
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. Vincent and R. B. J. Benson 2012 | Moderately sized plesiosaurian (skull length: 34 cm from the tip of the snout to the posterior margin of the occipital condyle), with six autapomorphies: (1) posteromedial processes of premaxillae (or possibly anterior portion of the frontal) form dorsoventrally thick, mediolaterally expanded platform with concave, anteroposteriorly striated dorsal surface; (2) small foramen penetrates the parietal sagittal crest posteriorly; (3) pterygoids do not extend anteriorly as far as the posterior end of the vomers and thus pterygoid-vomerine contact is absent; (4) absence of contact between the pterygoids in the palate; (5) cultriform process of parasphenoid wider mediolaterally than the combined posterior interpterygoid vacuities; and (6) two closely spaced foramina in the lateral surface of the exoccipital. A. lymense also possesses the following unique combination of characters: massive skull presenting a slightly constricted snout; ventral (alveolar) surface of premaxilla offset dorsally relative to that of the maxilla; prefrontals transversely broad, each only slightly less than the width of the conjoined frontals; frontals contacting each other for their entire length; postorbital extending far along the temporal fenestra; large anterior interpterygoid vacuity; lateral palatal fenestra between palatines and pterygoids; large teeth with lingual ridges; straight ramus of the dentary; short mandibular symphysis occupied by three tooth alveoli; and single-headed anterior cervical rib facets. |
Measurements
No measurements are available
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| Source: o = order | |||||
| Reference: Kiessling 2004 | |||||
Age range: base of the Early/Lower Hettangian to the top of the Early/Lower Pliensbachian or 201.30000 to 183.00000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Hettangian - Early/Lower Pliensbachian | United Kingdom (England) | Anningasaura lymense (type locality: 118938) |