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Geikiidae
Taxonomy
Geikiidae was named by Nopcsa (1923). It is not extant.
It was reranked as the unranked clade Geikiidae by Kammerer and Angielczyk (2009).
It was assigned to Anomodontia by Nopcsa (1923); to Pristerodontia by Maisch and Gebauer (2005); and to Cryptodontia by Kammerer and Angielczyk (2009).
It was reranked as the unranked clade Geikiidae by Kammerer and Angielczyk (2009).
It was assigned to Anomodontia by Nopcsa (1923); to Pristerodontia by Maisch and Gebauer (2005); and to Cryptodontia by Kammerer and Angielczyk (2009).
Synonymy list
Year | Name and author |
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1923 | Geikiidae Nopcsa |
2005 | Geikiidae Maisch and Gebauer |
2009 | Geikiidae Kammerer and Angielczyk |
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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.
Unr. †Geikiidae Nopcsa 1923
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Unr. †Geikiinae Nopcsa 1923
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G. †Aulacephalodon Seeley 1898
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†Aulacephalodon bainii Owen 1845
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Invalid names: Aulacocephalodon cadlei Broom 1948 [synonym], Aulacocephalodon hartzenbergi Broom 1937 [synonym], Aulacocephalodon haughtoni Broom 1921 [synonym], Aulacocephalodon latissimus Broom 1932 [synonym], Aulacocephalodon luckhoffi Broom 1937 [synonym], Aulacocephalodon peavoti Broom 1921 [synonym], Aulacocephalodon pricei Broom and George 1950 [synonym], Aulacocephalodon tigriceps Owen 1855 [synonym], Aulacocephalodon vanderhorsti Broom and George 1950 [synonym], Dicynodon bolorhinoides Watson 1960 [synonym], Dicynodon laticeps Broom 1912 [synonym], Proaulacocephalodon miltoni Toerien 1955 [synonym]
†Aulacephalodon cadlei Broom 1948
†Aulacephalodon rubidgei Broom 1940
Invalid names: Proaulacocephalodon Toerien 1955 [synonym]
G. †Odontocyclops Keyser and Cruickshank 1979
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Invalid names: Aulacocephalodontinae Toerien 1953 [empty]
Diagnosis
Reference | Diagnosis | |
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C. F. Kammerer and K. D. Angielczyk 2009 | No unambiguous autapomorphies diagnose Geikiidae in the analysis of Angielczyk (2007), although the gap coded morphometric character “maximum width of the distal end of the radius relative to the maximum length of the radius” provides support for the monophyly of this clade. Taxon sampling in the analyses of Fröbisch (2007) and Fröbisch & Reisz (2008) differs from that of Angielczyk (2007) by their exclusion of Odontocyclops. Taking this difference into account, the data sets of Fröbisch (2007) and Fröbisch & Reisz (2008) identified two autapomorphies of Geikiidae: (1) posterior portion of zygomatic portion of the squamosal thickened and/or downturned; (2) labial fossa present. However, both of these characters are absent in Odontocyclops (Angielczyk 2002, 2007). |
Measurements
No measurements are available
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Source: o = order, c = class, subp = subphylum, uc = unranked clade | |||||
References: Hendy et al. 2009, Carroll 1988, Benton 1983 |
Age range: base of the Wuchiapingian to the top of the Changhsingian or 259.90000 to 252.17000 Ma
Collections (43 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Late/Upper Severodvinian | Russian Federation (Tatarstan) | Idelesaurus tataricus (80712) | |
Wuchiapingian | Zambia (Eastern) | Aulacephalodon sp. (86257) | |
Wuchiapingian | South Africa (Eastern Cape) | Aulacephalodon baini (178740) Aulacephalodon bainii (80826 144272 176339 179335) Aulacephalodon cadlei (174622) Aulacephalodon rubidgei (174626) Aulacocephalodon hartzenbergi (176310) Bainia haughtoni (180677) Dicynodon whaitsi (178113) | |
Wuchiapingian | South Africa (Graaff-Reinet) | Aulacephalodon bainii (171378) | |
Wuchiapingian | Tanzania (Ruvuma) | Dicynodon locusticeps, Pelanomodon tuberosus (181520) | |
Wuchiapingian | South Africa (Western Cape) | Aulacephalodon baini (178742 178805) Aulacephalodon bainii (180347 180462) Aulacocephalodon vanderhorsti (178734) Bulbasaurus phylloxyron (185746 185747 185748 185749 185750) Dicynodon bolorhinoides (175565) Dicynodon whaitsi (181803) | |
Wuchiapingian | South Africa (Limpopo) | Dicynodon laticeps, Dicynodon whaitsi (178198) | |
Wuchiapingian | South Africa (Northern Cape) | Aulacephalodon baini (178523 179590) Bainia peavoti (174666) | |
Wuchiapingian | Zambia | Aulacephalodon sp. (184660 184662) Odontocyclops whaitsi (184599 185600) Rhachiocephalus dubius (184600) | |
Wuchiapingian - Changhsingian | South Africa (Western Cape) | Aulacocephalodon pricei (80176) Proaulacocephalodon miltoni (178477) | |
Wuchiapingian - Changhsingian | South Africa (Eastern Cape) | Aulacephalodon baini (171337) Aulacephalodon bainii (80174 80216 177601) Dicynodon tigriceps, Dicynodon bainii (174747) | |
Changhsingian | United Kingdom (Scotland) | Geikia elginensis (92323) |