| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Shastasaurus pacificus
Taxonomy
Shastasaurus pacificus was named by Merriam (1895). It is a 3D body fossil. Its type locality is Shasta County area, which is in a Carnian marine limestone in the Hosselkus Formation of California.
Synonyms
|
Synonymy list
| Year | Name and author |
|---|---|
| 1895 | Shastasaurus pacificus Merriam |
| 1902 | Shastasaurus pacificus Hay p. 463 |
| 1902 | Shastasaurus osmonti Merriam p. 93 figs. Plates 8 - 11 |
| 1902 | Shastasaurus altispinus Merriam p. 99 figs. Pl. 14, fig. 5, and Pl. 15. |
| 1902 | Shastasaurus pacificus Merriam p. 102 figs. Pl. 14, pigs. 1 and 2 |
| 1908 | Shastasaurus osmonti Merriam p. 138 |
| 1908 | Shastasaurus pacificus Merriam p. 143 |
| 1908 | Shastasaurus altispinus Merriam p. 144 |
| 1930 | Shastasaurus altispinus Hay p. 126 |
| 1930 | Shastasaurus osmonti Hay p. 126 |
| 1930 | Shastasaurus pacificus Hay p. 126 |
| 1985 | Shastasaurus osmonti Orr and Katsura |
| 1989 | Shastasaurus altispinus Callaway and Massare pp. 933-934 figs. 3-7 |
| 1994 | Shastasaurus pacificus Mcgowan p. 169 |
| 2000 | Shastasaurus pacificus Maisch and Matzke p. 68 |
| 2003 | Shastasaurus pacificus McGowan and Motani |
| 2010 | Shastasaurus pacificus Maisch |
| 2016 | Shastasaurus pacificus Ji et al. p. 10 |
Is something missing? Join the Paleobiology Database and enter the data
|
|
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.
†Shastasaurus pacificus Merriam 1895
show all | hide all
Invalid names: Shastasaurus altispinus Merriam 1902 [synonym], Shastasaurus osmonti Merriam 1902 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. M. Callaway and J. A. Massare 1989 (Shastasaurus altispinus) | "Diapophysial ridges of the dorsal vertebrae slender and greatly constricted at the point where the lower part of the ridge swings anteriorly; dorsal centra with average length/height ratio of 0.47; neural spines of dorsal vertebrae very thick transversely with almost circular cross sections except for blade-like anterior and posterior margins, relative height greater than in the other species, distal end hollowed by groovelike anteroposterior excavation; middle and posterior dorsal ribs broadheaded with rib-heads having two articular surfaces, the upper surface sharply turned away from the plane of the lower, the upper surface distinctly concave and more noticeably pitted than the lower; dorsal rib shafts almost triangulari n cross section proximally with slightly convex upper surface and grooved anteriorly and posteriorly, medial portion of shafts generally flattened; paddle elements ellipsoidal, leading edge of anterior elements sharply and deeply notched, central elements without notching or emargination, external edge of posterior elements emarginated, all elements with concave and roughened peripheral faces; teeth robust with slight lateral compression and with two sharp carinae on each tooth aligned parallel to the jaws." | |
| M. W. Maisch and A. T. Matzke 2000 | "Pubis with almost closed obturator notch in posterior margin, proximal margin of pubis as wide as distal margin, posterior thoracal vertebral centra more than half as long as they are high." |
Measurements
No measurements are available
|
|
||||
|
|
||||
|
|
||||
|
|
||||
| Source: o = order | |||||
| Reference: Kiessling 2004 | |||||
Collections (6 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Triassic | USA (California) | Shastasaurus osmonti (153314) | |
| Carnian | USA (California) | Shastasaurus altispinus (190855) Shastasaurus pacificus (type locality: 196798) | |
| Carnian | Mexico (Sonora) | Shastasaurus altispinus (102472 214415) | |
| Norian | USA (Oregon) | Shastasaurus osmonti (140303) |