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Petraiidae
Taxonomy
Petraiidae was named by de Koninck (1872).
It was assigned to Cyathaxoniicae by Hill (1956); and to Metriophyllina by Hill (1981).
It was assigned to Cyathaxoniicae by Hill (1956); and to Metriophyllina by Hill (1981).
Subtaxa
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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.
Fm. †Petraiidae de Koninck 1872
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G. †Haptophyllum Pedder 1967
G. †Petraia Münster 1839
G. †Petraiella Rozkowska 1969
G. †Protozaphrentis Yü 1957
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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Source: o = order, c = class | |||||
Reference: Kiessling 2004 |
Collections (6 total)
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Rawtheyan | United Kingdom (England) | Petraia sp. (3667) | |
Rawtheyan - Hirnantian | United Kingdom (Wales) | Petraia sp. (8292) | |
Cautleyan - Rawtheyan | United Kingdom (Wales) | Petraia sp. (8291) | |
Silurian | USA (Oklahoma) | Petraia sp. (528) | |
Pridoli - Lochkovian | Austria | Petraia laevis (13913) | |
Pragian - Emsian | Australia (Victoria) | Haptophyllum erisma (25717) |