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Preprismatoolithus
Taxonomy
Preprismatoolithus was named by Zelenitsky and Hills (1996). It is considered to be a form taxon. Its type is Prismatoolithus coloradensis. It is the type genus of Prismatoolithidae.
It was assigned to Allosauroidea by Zelenitsky and Currie (2004); and to Prismatoolithidae by Zelenitsky and Hills (1996), Moreno-Azanza et al. (2014) and Wang et al. (2018).
It was assigned to Allosauroidea by Zelenitsky and Currie (2004); and to Prismatoolithidae by Zelenitsky and Hills (1996), Moreno-Azanza et al. (2014) and Wang et al. (2018).
Species
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1994 | Prismatoolithus Hirsch p. 140 |
| 1996 | Preprismatoolithus Zelenitsky and Hills p. 1128 |
| 2004 | Preprismatoolithus Zelenitsky and Currie p. 134A |
| 2014 | Preprismatoolithus Moreno-Azanza et al. p. 847 |
| 2018 | Preprismatoolithus Wang et al. p. 267 |
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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.
G. †Preprismatoolithus Zelenitsky and Hills 1996
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†Preprismatoolithus coloradensis Hirsch 1994
Invalid names: Prismatoolithus Hirsch 1994 [replaced]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| K. F. Hirsch 1994 (Prismatoolithus) | Obliquiprismatic morphotype obliquicanaliculate pore system. Outer shell surface smooth, probably with faint striations. Shell thickness 0.7–1.0 mm. Restored egg approximately 110 x 60 mm in size, of elliptical shape, one end slightly more pointed. | |
| D. K. Zelenitsky and L. V. Hills 1996 | The oogeneric diagnosis from Hirsch (1994) is as follows: obliquiprismatic morphotype; obliquicanaliculatc pore system; outer surface smooth with faint striations; shell thickness 0.7–1.0 mm; eiiiptical-shaped eggs with one end more slightly pointed; egg size approximately 110 x 60 mm (EL = 1.8). |
Measurements
No measurements are available
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| Source: subc = subclass, c = class, subp = subphylum | |||||
| References: Hendy et al. 2009, Carroll 1988 | |||||
Age range: base of the Tithonian to the top of the Early/Lower Kimmeridgian or 152.10000 to 150.80000 Ma
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Kimmeridgian - Tithonian | USA (Colorado) | Prismatoolithus coloradensis (48157) | |
| Early/Lower Kimmeridgian | USA (Colorado) | Prismatoolithus coloradensis (48156) | |
| Late/Upper Kimmeridgian - Early/Lower Tithonian | USA (Colorado) | Dinosauria indet. (53021) Prismatoolithus coloradensis (53022) | |
| Tithonian | USA (Utah) | Prismatoolithus coloradensis (46439) | |
| Tithonian | USA (Colorado) | Prismatoolithus coloradensis (53040 53041) |