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Petrozium
Taxonomy
Petrozium was named by Smith (1930). Its type is Petrozium losseni.
It was assigned to Arachnophyllinae by Hill (1956); to Evenkiellidae by Kaljo (1958); to Kyphophyllidae by Merriam (1972) and Merriam (1973); to Entelophyllidae by Hill (1981); and to Rugosa by Sepkoski (2002).
It was assigned to Arachnophyllinae by Hill (1956); to Evenkiellidae by Kaljo (1958); to Kyphophyllidae by Merriam (1972) and Merriam (1973); to Entelophyllidae by Hill (1981); and to Rugosa by Sepkoski (2002).
Species
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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. †Petrozium Smith 1930
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†Petrozium losseni Dybowski 1873
†Petrozium mcallisteri Merriam 1973
†Petrozium staufferi Merriam 1972
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. W. Merriam 1972 | Smith's original diagnosis is as follows: "Dendroid rugose corals with long cylindrical corallites, which are reproduced non-parricidally by marginal gemmation; thin carinate septa of which the major reach or nearly reach the axis; small, distally arched tabulae; and small well-developed dissepiments." | |
| C. W. Merriam 1973 | Phaceloid rugose corals having long slender cylindrical corallites without connecting processes. Long axially thin major septa, some of which meet at the center, where they may be involved in an incipient axial structure. Dissepiments in several colu1nns, small, globose, steeply inclined toward axis. Tabularium wide, comprising arched tabellae mostly in- clined toward the periphery. Septal stereozone thin or absent. |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| Reference: Kiessling 2004 | |||||
Age range: base of the Rhuddanian to the top of the Ludlow or 443.40000 to 423.00000 Ma
Collections (19 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Silurian | USA (Alaska) | P. sp. m (108326) | |
| Rhuddanian | Canada (Quebec) | P. pelagicum (12938) | |
| Juuru | Estonia | P. losseni (77388 77389 174099) | |
| Juuru | Estonia (Hiiu) | P. losseni (174101 174178) | |
| Juuru | Estonia (Lääne) | P. losseni (174177) | |
| Llandovery | USA (Ohio) | P. pelagicum (13197 13205 13206 13238) | |
| Llandovery | Canada (Ontario) | P. sp. (513) | |
| Raikkula | Estonia | P. phaceloides, P. losseni (172928) | |
| Wenlock | Mongolia | P. sp., P. contortus (79640) | |
| Wenlock | USA (California) | P. mcallisteri (226647) | |
| Wenlock - Pridoli | USA (California) | Diphyphyllum fasciculum (214346) | |
| Ludlow | USA (California) | P. staufferi (79733 229579) |