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Lichakephalidae
Taxonomy
Lichakephalidae was named by Tripp (1957). It is not extant.
It was assigned to Lichoidea by Pollitt et al. (2005); and to Lichida by Whittington et al. (1997), Adrain (2011).
It was assigned to Lichoidea by Pollitt et al. (2005); and to Lichida by Whittington et al. (1997), Adrain (2011).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1957 | Eoacidaspididae Poletaeva |
| 1957 | Lichakephalidae Tripp |
| 1997 | Lichakephalidae Whittington et al. p. 299 |
| 2005 | Lichakephalidae Pollitt et al. p. 238 |
| 2011 | Lichakephalidae Adrain p. 105 |
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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.
Fm. †Lichakephalidae Tripp 1957
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G. †Acidaspides Lermontova 1951
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†Acidaspides entis Khramova 1977
†Acidaspides lermontovae Tchernysheva 1953
†Acidaspides precurrens Lermontova 1951
G. †Archikainella Liu 1982
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†Archikainella vomerinus Liu 1982
Invalid names: Chencunia Qiu 1984 [synonym], Metaacidaspis Qiu 1984 [synonym]
G. †Bestjubella Ivshin 1955
G. †Colossaspis Zhang 1983
G. †Eoacidaspis Poletaeva 1956
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†Eoacidaspis amplicauda Lazarenko 1968
†Eoacidaspis salairica Poletaeva 1956
G. †Lichakephalina Antsygin 1973
Invalid names: Eoacidaspididae Poletaeva 1957 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. R. Pollitt et al. 2005 | Moderately long preglabellar field (character 1). Longitudinal furrow can be effaced but, if not, is not continuous with S0 (character 2). S1 conjoins to S2 to circumscribe the lobe L2, may be effaced (character 3). Median glabella does not overhang the anterior border (character 7). Glabella lobe is L2 (character 10). Sagittal convexity of cranidium is weak (character 20). Path of anterior section of facial suture is strongly divergent (except in Acidaspidella, where it is subparallel: character 21). No interpleural furrows are present (character 35). All taxa have more than one complete pygidial inter-ring furrow (character 39). |
Measurements
No measurements are available
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| Source: f = family, o = order, c = class | |||||
| References: Aberhan et al. 2004, Whittington et al. 1997 | |||||
Age range: base of the Guzhangian to the top of the Tremadoc or 500.50000 to 477.10000 Ma
Collections (64 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Mayan | Russian Federation (Krasnoyar) | Belovia aliquantula (131434) Belovia laeta (131435) | |
| Mayan | Russian Federation | Belovia dissimilis (10118) | |
| Mayan - Ayusokkanian | Russian Federation | Acidaspides entis (232893 232894) | |
| Guzhangian | China (Hunan) | Paraacidaspis hunanica (49176 49182 49184) | |
| Ayusokkanian | Russian Federation (Yakut) | Acidaspides borealis (232897) | |
| Maduan | Russian Federation (Krasnoyar) | Acidaspidina plana (131069 131070 131344 131399) | |
| Nganasanian | Russian Federation (Krasnoyar) | Acidaspidella limata (131065 131066 131416) | |
| Paibian | China (Zhejiang) | Paraacidaspis sp. (128286) | |
| Paibian | China (Hunan) | Paraacidaspis hunanica (126130 126136 126140 126141 126142 126143 126144 126145 126283 126284 126286) Paraacidaspis sp., Paraacidaspis hunanica (126147) | |
| Sakian | Kazakhstan | Paraacidaspis hunanica (118305 118310 118313 118330 118332 118333 118339 118341 118342 118344 118345 118346 118348 118349 118350 118351) | |
| Dresbachian | France | Paraacidaspis ultima (56191) | |
| Tavgian | Russian Federation (Krasnoyar) | Acidaspides borealis (131343) Belovia cyclica, Acidaspidella limata (131067) | |
| Taoyuanian | Russian Federation (Sakha) | Eoacidaspis sp. (133600) | |
| Taoyuanian | Russian Federation (Krasnoyar) | Bestjubella sp. (132590) Eoacidaspis amplicauda (132508) | |
| Taoyuanian | China (Hunan) | Chencunia tripleura (126719) | |
| Ketyan | Russian Federation (Krasnoyar) | Eoacidaspis salairica (131098) | |
| Yurakian | Russian Federation (Krasnoyar) | Eoacidaspis salairica (131095 131096 131097 131401 131410) | |
| Jiangshanian | China | Archikainella vomerinus (235410) | |
| Niuchehean | China (Anhui) | Chencunia tripleura (127322) Metaacidaspis beigongensis (127321) | |
| Tremadocian | Morocco | Lichakephalus stubbsi (188932) | |
| Tremadoc | France (Montagne Noire) | Lichakephalus sp. (20832 76572) |