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Acamptonectes densus

Reptilia - Ophthalmosauridae

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 Speeton Clay Fm, Bed D2D, Speeton, Yorkshire, which is in a Hauterivian transition zone/lower shoreface claystone in the Speeton Clay Formation of the United Kingdom.

Synonymy list
YearName and author
2012Acamptonectes densus Fischer et al.
2013Acamptonectes densus Fischer et al.
2014Acamptonectes densus Arkhangelsky and Zverkov

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Sauropsida
classReptilia
RankNameAuthor
subclassEureptilia()
Romeriida
Diapsida()
Ichthyosauromorpha
Ichthyosauriformes
Ichthyopterygia(Owen 1840)
Eoichthyosauria
Ichthyosauria(de Blainville 1835)
Hueneosauria
Merriamosauria
Euichthyosauria
Parvipelvia
NeoichthyosauriaSander 2000
Thunnosauria
Baracromia
familyOphthalmosauridaeAppleby 1956
subfamilyOphthalmosaurinaeBaur 1887
genusAcamptonectes
speciesdensus

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.

Diagnosis
ReferenceDiagnosis
V. Fischer et al. 2012Ophthalmosaurid 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
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: base of the Hauterivian to the top of the Late/Upper Hauterivian or 132.90000 to 130.00000 Ma

Collections (3 total)


Time interval Ma Country or state Original ID and collection number
Early/Lower Hauterivian136.4 - 130.0United Kingdom (England) Acamptonectes densus (122652)
Late/Upper Hauterivian136.4 - 130.0Germany (Lower Saxony) Acamptonectes densus (122653)
Hauterivian132.9 - 129.4United Kingdom Acamptonectes densus (type locality: 66422)