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Polonoconchus
Taxonomy
Polonoconchus was named by Zaton and Krawczynski (2011). Its type is Polonoconchus skalensis. It was considered monophyletic by Zatoń and Krawczyński (2011).
It was assigned to Microconchida by Zatoń and Krawczyński (2011); and to Palaeoconchidae by Zatoń and Olempska (2017).
It was assigned to Microconchida by Zatoń and Krawczyński (2011); and to Palaeoconchidae by Zatoń and Olempska (2017).
Species
P. skalensis (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 2011 | Polonoconchus Zaton and Krawczynski |
| 2011 | Polonoconchus Zatoń and Krawczyński |
| 2017 | Polonoconchus Zatoń and Olempska p. 888 |
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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. †Polonoconchus Zaton and Krawczynski 2011
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†Polonoconchus skalensis Zaton and Krawczyński 2011
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. Zatoń and W. Krawczyński 2011 | Small, planispiral calcitic tube, dextrally coiled (clockwise), tube diameter increasing evenly, leaving the umbilicus opened. Tube cemented to the substrate with its
entire length, producing lateral basal projections. Tube exterior ornamented by longitudinal, somewhat wavy and thin striae, and transverse, robust ribs widening distally. It differs from the rest of Paleozoic genera by having an elaborated ornamentation with distally enlarging ribs. From the Jurassic Punctaconchus it differs in lacking punctae. |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Aberhan et al. 2004, Kiessling 2004 | |||||
Age range: base of the Emsian to the top of the Late/Upper Eifelian or 410.62000 to 387.95000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Emsian | Poland (Swietokrzyskie) | P. skalensis (240997) | |
| Late/Upper Eifelian | Poland (Swietokrzyskie) | P. skalensis (240998) |