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Ovaloolithus
Taxonomy
Ovaloolithus was named by Zhao (1979). It is not extant. It is considered to be a form taxon.
It was synonymized subjectively with Gorgosaurus by Li et al. (1996).
It was assigned to Spheroolithidae by Zhao (1979), Zhao et al. (1991), Zhao (1994); and to Ovaloolithidae by Mikhailov (1991), Mikhailov (1994), Mikhailov et al. (1994), Mikhailov (1997), Mikhailov (2000), Liang et al. (2009), Zhang and Wang (2010), Zhao et al. (2013), Zhang et al. (2017), Tanaka et al. (2023), Wang and Wang (2024).
It was synonymized subjectively with Gorgosaurus by Li et al. (1996).
It was assigned to Spheroolithidae by Zhao (1979), Zhao et al. (1991), Zhao (1994); and to Ovaloolithidae by Mikhailov (1991), Mikhailov (1994), Mikhailov et al. (1994), Mikhailov (1997), Mikhailov (2000), Liang et al. (2009), Zhang and Wang (2010), Zhao et al. (2013), Zhang et al. (2017), Tanaka et al. (2023), Wang and Wang (2024).
Synonymy list
| Year | Name and author |
|---|---|
| 1979 | Ovaloolithus Zhao pp. 332-333 |
| 1991 | Ovaloolithus Mikhailov p. 219 |
| 1991 | Ovaloolithus Zhao et al. p. 5 |
| 1994 | Ovaloolithus Mikhailov p. 155 |
| 1994 | Ovaloolithus Mikhailov et al. p. 97 |
| 1994 | Ovaloolithus Zhao p. 188 |
| 1997 | Ovaloolithus Mikhailov p. 50–52 |
| 2000 | Ovaloolithus Mikhailov p. 562 |
| 2009 | Ovaloolithus Liang et al. p. 1590 |
| 2010 | Ovaloolithus Zhang and Wang p. 74 |
| 2013 | Ovaloolithus Zhao et al. p. 4665 |
| 2017 | Ovaloolithus Zhang et al. p. 191 |
| 2023 | Ovaloolithus Tanaka et al. p. 203 |
| 2024 | Ovaloolithus Wang and Wang p. 40 |
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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. †Ovaloolithus Zhao 1979
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†Ovaloolithus chinkangkouensis Chao and Chiang 1974
†Ovaloolithus dinornithoides Mikhailov 1994
†Ovaloolithus huangtulingensis Yu 1998
†Ovaloolithus laminadermus Young 1954
†Ovaloolithus mixistriatus Zhao 1979
†Ovaloolithus monostriatus Zhao 1979
†Ovaloolithus sangpingensis Fang 1998
†Ovaloolithus tenuisus Bray 1999
†Ovaloolithus tristriatus Zhao 1979
†Ovaloolithus turpanensis Zhang and Wang 2010
†Ovaloolithus utahensis Bray 1999
†Ovaloolithus weiqiaoensis Yu 1998
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| K. E. Mikhailov 1994 | Large oval eggs (El = 1.2-1.4) with typical ovaloolithid shell microstructure (angustispherulitic morphotype, rimocanaliculate with elements of angusticanaliculate and prolatocanaliculate type of pore system; fig. 1d, e). | |
| K. E. Mikhailov 1997 | Medium-sized, ellipsoidal eggs (El = 1.2-1.4) with eggshell structure typical for ovaloolithids. Rimo-pore canals prevail among the range of rimo-, prolato-, and angusti- pore canals. General range of eggshell thickness is 1.3-3.0 mm. |