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Ptychonema
Taxonomy
Ptychonema was named by Perner (1903). It is not extant.
It was synonymized subjectively with Lophospira by Knight et al. (1960).
It was assigned to Eotomariidae by Horný (1997); to Holopeidae by Popov et al. (2007); and to Eotomariinae by Wagner (2023).
It was synonymized subjectively with Lophospira by Knight et al. (1960).
It was assigned to Eotomariidae by Horný (1997); to Holopeidae by Popov et al. (2007); and to Eotomariinae by Wagner (2023).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1903 | Ptychonema Perner |
| 1997 | Ptychonema Horný p. 54 |
| 2007 | Ptychonema Popov et al. p. 34 |
| 2023 | Ptychonema Wagner p. G596 |
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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. †Ptychonema Perner 1903
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†Ptychonema agyris Popov et al. 2007
†Ptychonema bussacensis Sharpe 1853
†Ptychonema desiderata Perner 1907
†Ptychonema marocanum Horný 1997
†Ptychonema nigrum Perner 1903
Diagnosis
No diagnoses are available