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Taxonomy
Porterfieldia was named by Cooper (1953) [Sepkoski's age data: O Aren-l O Cara-u Sepkoski's reference number: 378].
It was assigned to Triarthrinae by Harrington and Leanza (1957); to Oleninae by Ludvigsen and Tuffnell (1983); to Olenidae by Jell and Adrain (2002); and to Ptychopariida by Sepkoski (2002).
It was assigned to Triarthrinae by Harrington and Leanza (1957); to Oleninae by Ludvigsen and Tuffnell (1983); to Olenidae by Jell and Adrain (2002); and to Ptychopariida by Sepkoski (2002).
Synonymy list
| Year | Name and author |
|---|---|
| 1953 | Porterfieldia Cooper p. 8 |
| 1957 | Porterfieldia Harrington and Leanza |
| 1983 | Porterfieldia Ludvigsen and Tuffnell p. 572 |
| 2002 | Porterfieldia Jell and Adrain p. 429 |
| 2002 | Porterfieldia Sepkoski |
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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. †Porterfieldia Cooper 1953
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†Porterfieldia acava Edgecombe et al. 2005
†Porterfieldia convergens Whittard 1961
†Porterfieldia cuadrata Waisfeld 2001
†Porterfieldia fischeri Billings 1865
†Porterfieldia goldwyerensis Legg 1976
†Porterfieldia maanssonae Edgecombe et al. 2005
†Porterfieldia parapunctata Fortey 1974
†Porterfieldia punctata Crosfield and Skeat 1896
†Porterfieldia sinensis Chang and Fan 1965
†Porterfieldia thor Fortey 1974
†Porterfieldia turneri Baldis and Poethe 1995
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, f = family, c = class | |||||
| References: Hendy 2009, Aberhan et al. 2004, Whittington et al. 1997 | |||||
Collections (47 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Floian | Argentina | P. sp. (207950) | |
| Arenig | Argentina | P. maanssonae (235374) P. sp. (8719 8777) P. sp. 1, P. cuadrata (235350 235351) | |
| Arenig | United Kingdom | P. punctata (236348 236349 236350) | |
| Chazyan | Canada (Newfoundland and Labrador) | Triarthrus fischeri (104807 104861) | |
| Whiterockian | Norway (Spitsbergen) | Triarthrus parapunctatus (106478 106480) | |
| Whiterockian | Canada (Newfoundland and Labrador) | Triarthrus fischeri (104809 104810 104811 104813 104817 104855 104856 104862 104867 104868) Triarthrus fisheri (104857 104864) | |
| Darriwilian | Argentina (San Juan) | P. sp. (195044) | |
| Darriwilian | Australia (Western Australia) | Triarthrus goldwyerensis (236051) | |
| Darriwilian | Argentina | Bienvillia turneri (210668) | |
| Llanvirn | China (Xinjiang) | P. sinensis (188333 188334) | |
| Late/Upper Llanvirn | Argentina (San Juan) | P. turneri (73375) P. turneri, P. acava (73372 73374 73377) | |
| Late/Upper Llanvirn | Peru | P. sp. (8800) | |
| Gisbornian - Harnagian | Argentina | P. sp. (8708) | |
| Aurelucian | United Kingdom (Scotland) | P. sp. (181541) | |
| Costonian - Longvillian | Venezuela (Merida Andes) | P. sp. (8858) | |
| Sandbian | United Kingdom (Scotland) | P. caecigena (208115 208116 208120 208121) | |
| Caradoc | Canada (Northwest Territories) | P. sp. (341) | |
| Longvillian | Ireland (Lenister) | P. caecigenus (55714) | |
| Burrellian | United Kingdom (Scotland) | Triarthrus reedi (165043 192745) | |
| Actonian - Onnian | Argentina | P. sp. (8887) |