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Multifissoolithus
Taxonomy
Multifissoolithus was named by Zhang et al. (2019). It is considered to be a form taxon. Its type is Multifissoolithus chianensis.
It was assigned to Dongyangoolithidae by Zhang et al. (2019), Imai et al. (2021) and Zhang (2022).
It was assigned to Dongyangoolithidae by Zhang et al. (2019), Imai et al. (2021) and Zhang (2022).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 2019 | Multifissoolithus Zhang et al. p. 327–328 |
| 2021 | Multifissoolithus Imai et al. p. 1763 |
| 2022 | Multifissoolithus Zhang p. 60–61 |
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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. †Multifissoolithus Zhang et al. 2019
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†Multifissoolithus chianensis Zhang et al. 2019
†Multifissoolithus megadermus Young 1959
†Multifissoolithus shimonosekiensis Imai et al. 2021
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S.-K. Zhang et al. 2019 | As for the type and only oospecies. | |
| T. Imai et al. 2021 | Eggs with a diameter of 8–10 cm randomly arranged in a nest, roughly paralleled and wavy clefts on the outer surface, eggshell 3.21–4.70 mm thick with large cavities between columnar eggshell unit assemblages, and round pores in tangential sections. | |
| S.-K. Zhang 2022 | Eggs with a diameter of 8–10 cm randomly arranged in nest, eggshell 3.21–5.70 mm thick composed of cone-shaped or columnar eggshell unit assemblages, roughly paralleled and wavy clefts on the outer surface connecting to the large cavities between eggshell unit assemblages in the inner portion of the eggshell. Horizontal accretion lines throughout the whole eggshell. |
Measurements
No measurements are available
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| Source: subc = subclass, c = class, subp = subphylum | |||||
| References: Carroll 1988, Hendy et al. 2009 | |||||
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Aptian - Albian | Japan (Yamaguchi) | M. shimonosekiensis (229088) | |
| Albian - Cenomanian | China (Zhejiang) | M. chianensis (220281) | |
| Coniacian - Santonian | China (Shandong) | Oolithes megadermus (79742) |