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Pycnosteus
Taxonomy
Pycnosteus was named by Preobrajenski (1911) [Sepkoski's age data: D Give-u Sepkoski's reference number: 689].
It was assigned to Psammosteidae by Jordan (1963); and to Pteraspidomorphes by Sepkoski (2002).
It was assigned to Psammosteidae by Jordan (1963); and to Pteraspidomorphes by Sepkoski (2002).
Species
Synonymy list
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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. †Pycnosteus Preobrajenski 1911
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†Pycnosteus obruchevi Halstead Tarlo 1964
†Pycnosteus palaeformis Preobrazhensky 1911
†Pycnosteus pauli Mark-Kurik 1965
†Pycnosteus tuberculatus Rohon 1901
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: subp = subphylum, p = phylum | |||||
| References: Kiessling 2004, Carroll 1988 | |||||
Age range: base of the Eifelian to the top of the Early/Lower Givetian or 393.47000 to 385.90000 Ma
Collections (13 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Eifelian | Russian Federation | P. sp. (90332) | |
| Eifelian | Estonia | P. sp. (225793) | |
| Eifelian | Belarus | P. sp. (225881 225882) | |
| Early/Lower Givetian | Latvia | P. palaeformis (225850) P. pauli, P. palaeformis (225802) | |
| Early/Lower Givetian | Belarus | P. sp. (225886) | |
| Early/Lower Givetian | Estonia | P. palaeformis (225804) P. pauli (225803) P. tuberculatus (225851) | |
| Givetian | Belarus (Brest) | P. sp. (242244) | |
| Givetian | Belarus (Gormel) | P. sp. (242242) | |
| Givetian | Estonia | P. pauli, P. palaeformis (239664) |