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Acamptonectes densus
Taxonomy
Acamptonectes densus was named by Fischer et al. (2012). Its type specimen is GLAHM 132588, a partial skeleton (partial adult skeleton, including fragmentary skull roof, mandible, axial skeleton and scapular girdle), and it is a 3D body fossil. Its type locality is Bed D2D, Speeton, which is in a Hauterivian offshore claystone in the Speeton Clay Formation of the United Kingdom.
Synonymy list
Year | Name and author |
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2012 | Acamptonectes densus Fischer et al. |
2013 | Acamptonectes densus Fischer et al. |
2014 | Acamptonectes densus Arkhangelsky and Zverkov |
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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.
†Acamptonectes densus Fischer et al. 2012
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Diagnosis
Reference | Diagnosis | |
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V. Fischer et al. 2012 | Ophthalmosaurid characterized by the following autapomorphies: bilobed median concavity of the basioccipital for the foramen magnum; stapes with slender, rod-like shaft and large cubic occipital head; prominent, crest-like dorsal surface of basisphenoid; tightly interlocking dorsal centra with extensive posterolateral lamella; elongate thoracic neural spine >1.3 times the height of corresponding centra; ribs rounded in cross-section with a single deep proximal groove. It is also diagnosed by a unique character combination. |
Measurements
No measurements are available
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Reference: Kiessling 2004 |
Age range: Late/Upper Hauterivian or 136.40000 to 130.00000 Ma
Collections (3 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Early/Lower Hauterivian | United Kingdom (England) | Acamptonectes densus (type locality: 66422 122652) | |
Late/Upper Hauterivian | Germany (Lower Saxony) | Acamptonectes densus (122653) |