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Sphaerexochus
Taxonomy
Sphaerexochus was named by Beyrich (1845). Its type is Sphaerexochus mirus.
It was assigned to Cheirurinae by Raymond (1916); to Sphaerexochinae by Owen (1981); to Cheiruridae by Warburg (1925) and Jell and Adrain (2002); and to Phacopida by Sepkoski (2002).
It was assigned to Cheirurinae by Raymond (1916); to Sphaerexochinae by Owen (1981); to Cheiruridae by Warburg (1925) and Jell and Adrain (2002); and to Phacopida by Sepkoski (2002).
Species
S. arenosis, S. arenosus, S. atacius, S. brandlyi, S. bridgei, S. britanicus, S. calvus (syn. S. latirugatus, S. angustifrons, S. mirus), S. desertus, S. dimorphus, S. discrepans, S. eurys, S. fibrisulcatus, S. glaber, S. hapsidotus, S. hiratai, S. hisingeri (syn. Calymene clavifrons), S. johnstoni, S. laciniatus, S. latifrons, S. molongloensis, S. parvus, S. planirachis, S. pulcher, S. romingeri, S. scabridus, S. tuberculatus, S. valcourensis, Sphaerometopus
Species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1845 | Sphaerexochus Beyrich |
| 1854 | Sphaerometopus Angelin |
| 1916 | Sphaerexochus Raymond p. 41 |
| 1925 | Sphaerexochus Warburg |
| 1981 | Sphaerexochus Owen |
| 2002 | Sphaerexochus Jell and Adrain p. 447 |
| 2002 | Sphaerexochus 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. †Sphaerexochus Beyrich 1845
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†Sphaerexochus arenosis Chatterton and Ludvigsen 1977
†Sphaerexochus arenosus Chatterton and Ludvigsen 1976
†Sphaerexochus atacius Ludvigsen 1979
†Sphaerexochus brandlyi Chatterton and Perry 1984
†Sphaerexochus bridgei Cooper and Kindle 1936
†Sphaerexochus britanicus Dean 1971
†Sphaerexochus calvus Mc Coy 1846
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Invalid names: Sphaerexochus angustifrons Angelin 1854 [synonym], Sphaerexochus latirugatus Reed 1896 [synonym], Sphaerexochus mirus Beyrich 1845 [synonym]
†Sphaerexochus desertus Billings 1865
†Sphaerexochus dimorphus Whittington and Evitt 1953
†Sphaerexochus discrepans Raymond 1925
†Sphaerexochus eurys Tripp 1962
†Sphaerexochus fibrisulcatus Lu 1975
†Sphaerexochus glaber Holloway 1980
†Sphaerexochus hapsidotus Whittington and Evitt 1953
†Sphaerexochus hiratai Kobayashi and Hamada 1974
†Sphaerexochus johnstoni Chatterton and Perry 1984
†Sphaerexochus laciniatus Lindström 1885
†Sphaerexochus latifrons Angelin 1854
†Sphaerexochus molongloensis Chatterton and Campbell 1980
†Sphaerexochus parvus Billings 1865
†Sphaerexochus planirachis Kobayashi and Hamada 1974
†Sphaerexochus pulcher Whittington and Evitt 1953
†Sphaerexochus romingeri Hall 1868
†Sphaerexochus scabridus Angelin 1854
†Sphaerexochus tuberculatus Warburg 1925
†Sphaerexochus valcourensis Shaw and Bolton 2011
Invalid names: Sphaerometopus Angelin 1854 [nomen nudum]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, f = family, c = class | |||||
| References: Hendy 2009, Harrington et al. 1959, Aberhan et al. 2004 | |||||
Age range: base of the Billingen to the top of the Whitwellian or 474.80000 to 425.40000 Ma
Collections (218 total)
Oldest occurrences | |||
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Arenig | Sweden | S. sp. (3196) | |
| Billingen | Sweden (Närne) | S. sp. (192903) | |
| Chazyan | Canada (Northwest Territories) | S. arenosus (24621 25932 25933 25935 26054 26055 26057) S. sp. (315) | |
| Chazyan | Canada (Quebec) | S. sp. (305 307 311 435) | |
| Chazyan | USA (New York) | S. parvus (56184 56212 56215 171704 172310 172317 172318 172320 172322 172323 172328 172329) | |
| Whiterockian | USA (Vermont) | S. parvus (103276 103281 103291 103292 103293 103295 103298) | |
| Whiterockian | USA (New York) | S. parvus (103000 103001 103002 103005 103017 103279 103282 103314 103316) | |
| Whiterockian | USA (Oklahoma) | S. sp. (105636) | |
| Whiterockian | Canada (Quebec) | S. parvus (111361 111363 111431 111432 111441 111461 111464) | |
| Chazyan - Caradoc | Canada (Northwest Territories) | S. sp. (25308 25309 25310) | |
Youngest occurrences |
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| Time interval | Ma | Country or state | PBDB collection number |
| Gorstian | Sweden (Gotland) | S. latifrons (13561 13563) S. latifrons, S. laciniatus (13564) S. sp., S. laciniatus (13603) | |
| Gorstian - Ludfordian | Czech Republic | S. paramirus (14066) | |
| Gorstian - Ludfordian | Sweden (Gotland) | S. laciniatus (13617) | |
| Ludlow | Japan (Skikoku) | S. hiratai (188692) | |
| Ludlow | Japan (Shikoku) | S. hiratai, S. planirachis (188690) | |
| Ludfordian | Sweden (Gotland) | S. laciniatus (13569) S. sp., S. laciniatus (13616) | |
| Ludfordian | USA (Indiana) | S. sp., S. romingeri (6706) | |
| Ludfordian | Czech Republic | S. paramirus (14057) | |
| Ludfordian | Australia (New South Wales) | S. lorum (25634 25635) | |
| Ludfordian | Uzbekistan | S. mirus (216475 216476) | |