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Macroolithus
Taxonomy
Macroolithus was named by Zhao (1975). It is considered to be a form taxon.
It was assigned to Elongatoolithidae by Zhao (1975), Zhao (1979), Mikhailov (1991), Zhao et al. (1991), Mikhailov (1994), Mikhailov et al. (1994), Zhao (1994), Mikhailov (2000), Zelenitsky et al. (2000), Amo Sanjuán et al. (2000), Cousin (2002), Watabe (2004), Cheng et al. (2008), Liang et al. (2009), Wang et al. (2010), Wang et al. (2013), Huh et al. (2014), He et al. (2019), Simon et al. (2019) and Jin et al. (2020).
It was assigned to Elongatoolithidae by Zhao (1975), Zhao (1979), Mikhailov (1991), Zhao et al. (1991), Mikhailov (1994), Mikhailov et al. (1994), Zhao (1994), Mikhailov (2000), Zelenitsky et al. (2000), Amo Sanjuán et al. (2000), Cousin (2002), Watabe (2004), Cheng et al. (2008), Liang et al. (2009), Wang et al. (2010), Wang et al. (2013), Huh et al. (2014), He et al. (2019), Simon et al. (2019) and Jin et al. (2020).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1975 | Macroolithus Zhao p. 106 |
| 1979 | Macroolithus Zhao pp. 336-337 |
| 1991 | Macroolithus Mikhailov p. 221 |
| 1991 | Macroolithus Zhao et al. p. 5 |
| 1994 | Macroolithus Mikhailov p. 117 |
| 1994 | Macroolithus Mikhailov et al. p. 103 |
| 1994 | Macroolithus Zhao p. 187 |
| 2000 | Macroolithus Amo Sanjuán et al. p. 8 |
| 2000 | Macroolithus Mikhailov p. 569 |
| 2000 | Macroolithus Zelenitsky et al. p. 130 |
| 2002 | Macroolithus Cousin p. 44 |
| 2004 | Macroolithus Watabe p. 17 |
| 2008 | Macroolithus Cheng et al. p. 1090 |
| 2009 | Macroolithus Liang et al. p. 1590 |
| 2010 | Macroolithus Wang et al. p. 114 |
| 2013 | Macroolithus Wang et al. p. 199 |
| 2014 | Macroolithus Huh et al. p. 220 |
| 2019 | Macroolithus He et al. p. 353 |
| 2019 | Macroolithus Simon et al. p. 7 |
| 2020 | Macroolithus Jin et al. p. 9 |
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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. †Macroolithus Zhao 1975
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†Macroolithus mutabilis Mikhailov 1994
†Macroolithus rugustus Young 1965
†Macroolithus yaotunensis Zhao 1975
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| K. E. Mikhailov 1994 | Large elongate-ellipsoidaieggs (more than 170 mm long) with "rough" ornament on surface (a = 6-8) and typically elongatolithidmicrostructure of shell. Ratio of spongiose to mammillar layers ranging from 2:1 to 3:1. |