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Taxonomy
Acanthocrania was named by Williams (1943). Its type is Crania spiculata.
It was assigned to Craniacea by Brunton and Champion (1974); to Craniidae by Wright (1963), Mitchell (1977), Williams et al. (2000); and to Acrotretida by Sepkoski (2002).
It was assigned to Craniacea by Brunton and Champion (1974); to Craniidae by Wright (1963), Mitchell (1977), Williams et al. (2000); and to Acrotretida by Sepkoski (2002).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1943 | Acanthocrania Williams |
| 1963 | Acanthocrania Wright |
| 1974 | Acanthocrania Brunton and Champion p. 815 |
| 1977 | Acanthocrania Mitchell |
| 2000 | Acanthocrania Williams et al. p. 171 |
| 2002 | Acanthocrania 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. †Acanthocrania Williams 1943
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†Acanthocrania alta Cooper and Grant 1974
†Acanthocrania conferta Cooper and Grant 1974
†Acanthocrania cracentis Wright 1963
†Acanthocrania densispina Cooper and Grant 1974
†Acanthocrania elusa Cocks 2014
†Acanthocrania intermedia Cooper and Grant 1974
†Acanthocrania magna Cooper and Grant 1974
†Acanthocrania minutispinosa Cooper and Grant 1974
†Acanthocrania nordtimanica Kalashnikov 1993
†Acanthocrania platys Cooper and Grant 1974
†Acanthocrania regularis Cooper and Grant 1974
†Acanthocrania setigera Hall 1866
†Acanthocrania spiculata Rowley 1908
†Acanthocrania vasta Cooper and Grant 1974
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| valve height | 23 | 3.28 | 2.00 | 6.20 | 3.00 | 1.15 |
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| Source: g = genus, o = order, c = class, p = phylum | |||||
| References: Williams et al. 1996, Aberhan et al. 2004, Hendy 2009 | |||||
Age range: base of the Longvillian to the top of the Capitanian or 457.20000 to 259.51000 Ma
Collections (105 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Ashbyan | USA (Virginia) | A. sp. (6674) | |
| Blackriveran | USA (Oklahoma) | A. erecta, A. subquadrata (23893) A. oklahomensis, A. subquadrata (23895) | |
| Blackriveran | USA (Illinois, Iowa) | A. granulosa, A. setigeria (23789 23790 23791 23792 23794) | |
| Blackriveran | USA (Minnesota) | A. granulosa, A. setigeria (23273 23274) | |
| Blackriveran - Rocklandian | USA (Minnesota) | A. granulosa, A. setigeria (23276) | |
| Blackriveran - Rocklandian | USA (Illinois, Iowa) | A. granulosa, A. setigeria (23795) | |
| Kirkfieldian | USA (Illinois, Iowa) | A. setigeria (23797 23798) | |
| Rocklandian - Kirkfieldian | USA (Illinois, Iowa) | A. setigeria (23796) | |
| Rocklandian - Shermanian | USA (Minnesota) | A. setigeria (23277 23290) | |
| Shermanian | USA (Minnesota) | A. granulosa, A. setigeria (23278) | |
| Shermanian | USA (Illinois, Iowa) | A. granulosa (23799) A. granulosa, A. setigeria (23800 23801) | |
| Blackriveran - Late/Upper Ordovician | USA (Tennessee) | A. sp. (6707) | |
| Longvillian | Ireland (Leinster) | A. sp. (55677) | |
| Longvillian | Ireland (Lenister) | A. sp. (55710) | |
| Chatfieldian | Canada (Ontario) | Crania setigera (185268) | |
| Wufeng | China (Hubei) | A. sp. (4687) | |
| Cautleyan | United Kingdom | A. sp. (163264) | |
| Cautleyan | Ireland (Leinster) | A. sp. (89130) | |
| Cautleyan | United Kingdom (Wales) | A. elusa (185109 185112) | |
| Rawtheyan | United Kingdom (Wales) | A. elusa (185114 185115) | |
| Hirnantian | China (Hubei) | A. sp. (151939 151940) | |
| Hirnantian | Norway (Oslo-Asker District) | A. sp. (364) | |
| Early/Lower Emsian | Canada (Yukon Territory) | A. sp. (26658) | |
| Famennian | Germany (Nordrhein-Westfalen) | A. laevis (38273 38295 38329) | |
| Late/Upper Famennian | USA (Montana) | A. spinosa (643 7138 7143 7150 7156 7162 7165) | |
| Late/Upper Famennian | Germany (Nordrhein-Westfalen) | A. laevis (38304) | |
| Late/Upper Famennian | USA (Missouri) | Crania spiculata (6027 6029) | |
| Tournaisian | Belgium (Hainaut) | A. psammophora (234047) | |
| Tournaisian | China (Guizhou) | A. sp. (58462) | |
| Chadian - Holkerian | United Kingdom (England) | A. laevis (5510) | |
| Morrowan | USA (Oklahoma) | A. sp. (76485) | |
| Asselian | USA (Texas) | A. sp. (43468 43472 43481 75939 75952) | |
| Sakmarian | Russian Federation (Nenetsia) | A. nordtimanica (110163) | |
| Artinskian | USA (Texas) | A. alta (75936) | |
| Kungurian | USA (Texas) | A. densispina (43491 43495 43513 105879) A. sp. (43492 43494 43534 81638 105935 105938) A. sp., A. magna (105931) A. sp., A. platys (75865) | |
| Roadian | USA (Texas) | A. conferta (81693 102602 106021) A. densispina (101783 102603 102610 102611 102615 105874) A. intermedia (43548 43551 43553 81650 102605 105887) | |
| Wordian | USA (Texas) | A. conferta (43557) A. intermedia (105821) A. minutispinosa (81939 105896) A. sp. (81695 102619 106244 106245) A. sp., A. minutispinosa (105902) A. sp., A. vasta (101867) | |
| Capitanian | USA (New Mexico) | A. sp. (105989) | |
| Capitanian | USA (Texas) | A. regularis (105894) A. sp. (81624 81625 105895 106248 106249) A. vasta (101798) |