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Clarkoceras
Taxonomy
Clarkoceras was named by Ruedemann (1905). It is not extant.
It was assigned to Cyrtendoceratidae by Ulrich et al. (1943); to Ellesmerocerida by Sepkoski (2002); and to Ellesmeroceratidae by Flower (1964), Teichert et al. (1964), Crick (1981), Kröger and Landing (2007).
It was assigned to Cyrtendoceratidae by Ulrich et al. (1943); to Ellesmerocerida by Sepkoski (2002); and to Ellesmeroceratidae by Flower (1964), Teichert et al. (1964), Crick (1981), Kröger and Landing (2007).
Species
C. affine, C. arcuatum, C. buttsi, C. calvini, C. cinctum, C. clelandi, C. confertum, C. corniculum, C. crassum, C. cuneatum, C. curvatum, C. expansum, C. gracile, C. huzzahense, C. inconstans, C. jasperense, C. lawrencense, C. levisense, C. luthei, C. luthei, C. magnisiphonatum, C. minneiskense, C. modestum, C. mohawkense, C. multicameratum, C. newtonwinchelli (syn. C. claytonense), C. parvisiphonatum, C. rectum, C. ruedemanni, C. ruguliferum, C. subarcuatum, C. subcrassum, C. subrectum, C. vicinum, C. whitehallense
Synonymy list
| Year | Name and author |
|---|---|
| 1905 | Clarkoceras Ruedemann p. 337 figs. 25, 26 |
| 1943 | Clarkoceras Ulrich et al. |
| 1964 | Clarkeoceras Flower p. 67 |
| 1964 | Clarkoceras Teichert et al. p. 135 |
| 1981 | Clarkoceras Crick p. 227 |
| 2002 | Clarkoceras Sepkoski |
| 2007 | Clarkoceras Kröger and Landing |
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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. †Clarkoceras Ruedemann 1905
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†Clarkoceras affine Ulrich et al. 1943
†Clarkoceras arcuatum Ulrich et al. 1943
†Clarkoceras buttsi Ulrich et al. 1943
†Clarkoceras calvini Ulrich et al. 1943
†Clarkoceras cinctum Ulrich et al. 1943
†Clarkoceras clelandi Ulrich et al. 1943
†Clarkoceras confertum Ulrich et al. 1943
†Clarkoceras corniculum Sardeson 1896
†Clarkoceras crassum Ulrich et al. 1943
†Clarkoceras cuneatum Ulrich et al. 1943
†Clarkoceras curvatum Ulrich et al. 1943
†Clarkoceras expansum Ulrich et al. 1943
†Clarkoceras gracile Ulrich et al. 1943
†Clarkoceras huzzahense Ulrich et al. 1943
†Clarkoceras inconstans Ulrich et al. 1943
†Clarkoceras jasperense Ulrich et al. 1943
†Clarkoceras lawrencense Ulrich et al. 1943
†Clarkoceras levisense Ulrich et al. 1943
†Clarkoceras luthei Ulrich et al. 1943
†Clarkoceras luthei Calvin 1892
†Clarkoceras magnisiphonatum Ulrich et al. 1943
†Clarkoceras minneiskense Ulrich et al. 1943
†Clarkoceras modestum Ulrich et al. 1943
†Clarkoceras mohawkense Ulrich et al. 1943
†Clarkoceras multicameratum Ulrich et al. 1943
†Clarkoceras newtonwinchelli Clarke 1897
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Invalid names: Clarkoceras claytonense Powell 1935 [synonym]
†Clarkoceras parvisiphonatum Ulrich et al. 1943
†Clarkoceras rectum Ulrich et al. 1943
†Clarkoceras ruedemanni Flower 1964
†Clarkoceras ruguliferum Ulrich et al. 1943
†Clarkoceras subarcuatum Ulrich et al. 1943
†Clarkoceras subcrassum Ulrich et al. 1943
†Clarkoceras subrectum Ulrich et al. 1943
†Clarkoceras vicinum Ulrich et al. 1943
†Clarkoceras whitehallense Ulrich et al. 1943
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Aberhan et al. 2004 | |||||
Collections (39 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Skullrockian | USA (New York) | C. ruedemanni (87318) | |
| Skullrockian - Stairsian | USA (Tennessee) | C. buttsi (189330) C. parvisiphonatum (189321) | |
| Demingian | USA (Tennessee) | C. curvatum, C. jasperense (154344) | |
| Demingian | USA (New York) | Clarkeoceras rhomboidale, Clarkeoceras sp., Clarkeoceras ruedemanni (427) | |
| Gasconadian | USA (Missouri) | C. affine, C. arcuatum, C. crassum, C. subcrassum (189327) C. arcuatum, C. cinctum, C. confertum, C. cuneatum, C. huzzahense, C. magnisiphonatum, C. subarcuatum, C. subcrassum, C. subrectum, C. vicinum (189328) | |
| Gasconadian | USA (Texas) | Clarkeoceras luthei (88805) C. inconstans, C. ruguliferum (56498) C. sp. (271) | |
| Gasconadian | USA (New York) | Clarkeoceras rhomboidale, Clarkeoceras trapezoidale, Clarkeoceras ruedemanni (56487) C. clelandi (119377) C. sp. (273) C. whitehallense (189343) | |
| Tremadocian | Canada (Alberta) | C. sp. (189399) | |
| Tremadocian | USA (Minnesota) | C. gracile (189336) C. newtonwinchelli (189324) C. newtonwinchelli, C. corniculum, C. gracile, C. luthei (101766) C. newtonwinchelli, C. gracile (189325) C. newtonwinchelli, C. minneiskense (189301) | |
| Tremadocian | USA (Iowa) | C. newtonwinchelli, C. calvini, C. luthei (101765) | |
| Tremadocian | USA (Missouri) | C. arcuatum, C. subarcuatum (189329) C. inconstans (189337) C. modestum (189340) C. multicameratum (189341) C. newtonwinchelli (154358) C. rectum (189342) | |
| Tremadocian | USA (Wisconsin) | C. calvini, C. luthei (189290) C. expansum, C. gracile, C. luthei (189335) C. luthei (189339) C. newtonwinchelli (189288) | |
| Tremadocian | USA (New York) | C. clelandi (189333) C. mohawkense (189334) | |
| Tremadoc | USA (Virginia) | C. sp. (6971) | |
| Tremadoc | USA (Missouri) | C. sp. (8941) | |
| Tremadoc | Argentina | Clarkeoceras sp. (9010) | |
| Tremadoc | China (Hubei) | C. sp. (4742) | |
| Cassinian | Canada (Quebec) | C. lawrencense (189338) C. lawrencense, C. levisense (101017) |