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Aristocystites metroi
Taxonomy
Aristocystites metroi was named by Parsley (1990). Its type specimen is L22085 and is a 3D body fossil. Its type locality is Metro tunnel under Stvanice Island in Vltava River, Prague, which is in a Berounian offshore shelf shale in the Zahorany Formation of the Czech Republic.
Synonymy list
| Year | Name and author |
|---|---|
| 1990 | Aristocystites metroi Parsley p. 292 fig. 11 |
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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.
†Aristocystites metroi Parsley 1990
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. L. Parsley 1990 | Description. -Considerably larger than type species, incom- plete specimens up to 15 cm long are known, perhaps attaining thecal lengths of 18-20 cm. Theca somewhat flattened, espe- cially on anterior surface. Plate arrangement variable, plates in each transverse row, especially on anterior face, somewhat more variable in size and shape than in type species; internal plate and diplopore structure same as for type species; holdfast cup- shaped, very small relative to size of theca (Figure 11.1); peri- stome, periproct, hydropore, and gonopore unknown. |