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Tyrridiocystis
Taxonomy
Tyrridiocystis was named by Broadhead and Strimple (1978) [Sepkoski's age data: D Gedi Sepkoski's reference number: 327]. It is not extant.
It was assigned to Rhombifera by Sepkoski (2002); and to Echinoencrinitidae by Paul and Rozhnov (2016).
It was assigned to Rhombifera by Sepkoski (2002); and to Echinoencrinitidae by Paul and Rozhnov (2016).
Entered
by J. Sepkoski on 2003-01-23; modified by P. Novack-Gottshall on 2018-06-01
Synonymy list
| Year | Name and author |
|---|---|
| 1978 | Tyrridiocystis Broadhead and Strimple |
| 2002 | Tyrridiocystis Sepkoski |
| 2016 | Tyrridiocystis Paul and Rozhnov p. 261 |
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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. †Tyrridiocystis Broadhead and Strimple 1978
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. R. C. Paul and S. V. Rozhnov 2016 | Glyptocystitoid family with reduced oral area, with theca composed of 26 or 25 plates arranged in five circlets according to the formula: 4 basals (B, plural BB), 5 infralaterals (ILL), 5 laterals (LL), 4 or 5 radials (RR), and 7 orals (OO), with disjunct pectinirhombs. |
Measurements
No measurements are available
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| Source: o = order, p = phylum | |||||
| References: Aberhan et al. 2004, Aberhan 1992 | |||||
Age range: Lochkovian or 419.62000 to 413.02000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Lochkovian | USA (Tennessee) | T. sp. (26852) |