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Tatenectes laramiensis
Taxonomy
Cimoliasaurus laramiensis was named by Knight (1900). Its type specimen is UW 15943 UW24801, a partial skeleton ("axial skeleton, ribs, pectoral girdle, and forelimb elements"), and it is a 3D body fossil. Its type locality is Near Freezeout Mountain(s) [PROXY], which is in an Oxfordian marine horizon in the Sundance Formation of Wyoming.
It was recombined as Tricleidus laramiensis by Mehl (1912); it was recombined as Tatenectes laramiensis by O'Keefe and Wahl (2003), O'Keefe and Street (2009), O'Keefe et al. (2011).
It was recombined as Tricleidus laramiensis by Mehl (1912); it was recombined as Tatenectes laramiensis by O'Keefe and Wahl (2003), O'Keefe and Street (2009), O'Keefe et al. (2011).
Synonymy list
| Year | Name and author |
|---|---|
| 1900 | Cimoliasaurus laramiensis Knight |
| 1902 | Cimoliasaurus laramiensis Hay p. 459 |
| 1903 | Cimoliasaurus laramiensis Williston p. 7 |
| 1912 | Tricleidus laramiensis Mehl |
| 2003 | Tatenectes laramiensis O'Keefe and Wahl, Jr. |
| 2009 | Tatenectes laramiensis O'Keefe and Street p. 49 figs. 1-7 |
| 2011 | Tatenectes laramiensis O'Keefe et al. |
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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.
†Tatenectes laramiensis Knight 1900
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. R. O'Keefe and W. Wahl 2003 | "A small plesiosaur with an unknown number of cervical vertebrae, but probably less than 31. Cervical vertebrae are much shorter than wide, are not waisted, and do not have elongate articulations for cervical ribs. The foramina subcentralia are widely spaced, and the rims of articular faces are poorly ossified. The humerus possesses radial and ulnar articulations that are subequal in length, articulations for for two supernumerary ossifications in the epipodial row, and a long, slender shaft. The scapula possesses a medial process extending toward the midline but not contacting its neighbor, and certainly lacking a long midline suture. Suture between scapula and coracoid in center of glenoid. Teeth narrow and recurved with long roots, and striated all around. Anterior interpterygoid vacuity present; the pterygoids behind this vacuity are developed into a deep block of bone giving a distinct shelf to the basicranium. Pterygoid processes extend caudally in a U-shape to effect articulation with the basioccipital tubers." | |
| F. R. O'Keefe and H. P. Street 2009 | "A small (total body length of about 2 meters) plesiosaur with an unknown number of cervical vertebrae. Cervical vertebrae much shorter than wide, not constricted at midcentrum, and with well-defined rib articulations that are not elongate; foramina subcentralia widely spaced; the rims of articular faces of cervical vertebrae are poorly defined due to lack of ossification; humerus with long, slender shaft and radial and ulnar articulations that are subequal in length; articulations for two supernumerary ossifications in the epipodial row; scapulae medial processes meet in a median symphysis anterior to the pectoral fenestrae, but symphysis is relatively short, and the medial process of the scapula is short antero-posteriorly; short anterior extensions of the scapulae are separated on the midline by a deep notch, which is covered dorsally by a reduced, plate-like clavicle; teeth small, narrow and recurved with relatively long roots, and lightly lineated all around; anterior interpterygoid vacuity present; pterygoids behind anterior pterygoid vacuity are developed into a deep block of bone projecting ventrally out of the plane of the palate; parasphenoid not visible in palatal view." |
Measurements
No measurements are available
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| Source: o = order | |||||
| Reference: Kiessling 2004 | |||||
Age range: base of the Early/Lower Oxfordian to the top of the Oxfordian or 161.20000 to 157.30000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Oxfordian | USA (Wyoming) | Cimoliasaurus laramiensis (119282) Tatenectes laramiensis (103921) | |
| Early/Lower Oxfordian | USA (Wyoming) | Tatenectes laramiensis (96690) |