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Parafrechites
Taxonomy
Parafrechites was named by Silberling and Nichols (1982).
It was assigned to Beyrichitidae by Dagis et al. (1996); and to Beyrichitinae by Ji and Bucher (2018).
It was assigned to Beyrichitidae by Dagis et al. (1996); and to Beyrichitinae by Ji and Bucher (2018).
Species
P. cordeyi, P. dunni (syn. Beyrichites osmonti, Ceratites williamsi), P. egorovi, P. evolutus, P. kharaulakhensis, P. meeki (syn. Ceratites (Gymnotoceras) russelli, Ceratites (Gymnotoceras) wemplei, Ceratites (Hollandites) montisbovis, Ceratites (Gymnotoceras) beckeri, Ceratites washburnei, Ceratites tenuispiralis), P. sublaqueatus
Synonymy list
Year | Name and author |
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1982 | Parafrechites Silberling and Nichols p. 27 |
1996 | Parafrechites Dagis et al. p. 117 |
2018 | Parafrechites Ji and Bucher p. 637 |
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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. †Parafrechites Silberling and Nichols 1982
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†Parafrechites cordeyi Ji and Bucher 2018
†Parafrechites dunni Smith 1914
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Invalid names: Beyrichites osmonti Smith 1914 [synonym], Ceratites williamsi Smith 1914 [synonym]
†Parafrechites egorovi Konstantinov 1991
†Parafrechites evolutus Konstantinov 1991
†Parafrechites kharaulakhensis Konstantinov 1991
†Parafrechites meeki Mojsisovics 1888
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Invalid names: Ceratites (Gymnotoceras) beckeri Smith 1914 [synonym], Ceratites (Gymnotoceras) russelli Smith 1914 [synonym], Ceratites (Gymnotoceras) wemplei Smith 1914 [synonym], Ceratites (Hollandites) montisbovis Smith 1914 [synonym], Ceratites tenuispiralis Smith 1914 [synonym], Ceratites washburnei Smith 1914 [synonym]
†Parafrechites sublaqueatus Bytschkov 1976
Diagnosis
No diagnoses are available
Measurements
part | N | mean | minimum | maximum | median | s.d. | |
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shell height | 33 | 19.5 | 10.4 | 36.0 | 18.5 | 6.93 | |
shell diameter | 33 | 41.5 | 23.1 | 77.0 | 38.0 | 13.9 | |
shell inflation | 33 | 9.91 | 6.00 | 19.0 | 10.0 | 3.02 |
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Source: o = order, c = class | |||||
References: Kiessling 2004, Kiessling 2003 |
Collections (37 total)
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Anisian | USA (Nevada) | Ceratites williamsi, Ceratites russelli (33207) | |
Anisian | Russian Federation (Primorye) | Beyrichites osmonti (46901) | |
Anisian | Russian Federation | Beyrichites dunni, Beyrichites osmonti (202896) P. sp. (124653) P. sublaqueatus (124640 124652) | |
Illyrian | Russian Federation | P. meeki (151178 151199 151200 151201 151202 151204) P. meeki, P. egorovi (151198) P. sublaqueatus, P. evolutus (151203) P. sublaqueatus, P. meeki, P. evolutus, P. kharaulakhensis, P. egorovi (107008) | |
Illyrian | Svalbard and Jan Mayen (Spitsbergen) | P. migayi (211377) | |
Illyrian | Canada (British Columbia) | P. cordeyi (197422 197423) | |
Illyrian | USA (Nevada) | Ceratites russelli (33270) Ceratites tenuispiralis, Ceratites williamsi, Ceratites washburnei, Ceratites montisbovis, Ceratites beckeri, Ceratites meeki, Ceratites russelli, Ceratites wemplei, Beyrichites dunni, Beyrichites osmonti, Gymnotoceras blakei, Ceratites organi (142670) P. dunni (40753 44034 110987 143218 143219) P. meeki (38921 38923 38926 43860 57090 142861 142869 143016 143217) | |
Illyrian - Fassanian | USA (Nevada) | Gymnotoceras blakei (142621) | |
Ladinian | Russian Federation | P. meeki (124554) P. sublaqueatus (124555) |