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Polyclonoolithus yangjiagouensis
Taxonomy
Polyclonoolithus yangjiagouensis was named by Xie et al. (2016). It is considered to be a form taxon. Its type specimen is ZMNH M1849, an egg, and it is a 3D body fossil. Its type locality is Guanmengou No. 4 bonebed, which is in a Barremian/Aptian lacustrine siltstone/mudstone in the 5 Formation of China. It is the type species of Polyclonoolithus.
Synonymy list
| Year | Name and author |
|---|---|
| 2016 | Polyclonoolithus yangjiagouensis Xie et al. p. 82 |
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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.
†Polyclonoolithus yangjiagouensis Xie et al. 2016
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J.-F. Xie et al. 2016 | 1.9 mm thick on average, branched eggshell units and obvious horizontal
accretion lines. Eggshell units typically fused towards the outer surface, but lacking a compact layer. Multi-angular eggshell units are interlocked or isolated in tangential sections. Pore canals irregular in shape with large cavities near the inner surface of the eggshell. |
Measurements
No measurements are available
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| Source: subc = subclass, c = class, subp = subphylum | |||||
| References: Hendy et al. 2009, Carroll 1988 | |||||
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Barremian - Aptian | China (Gansu) | Polyclonoolithus yangjiagouensis (type locality: 155994) |