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Tricrepicephalus
Taxonomy
Tricrepicephalus was named by Kobayashi (1935) [Sepkoski's age data: Cm mMid-u Cm Dres-l Sepkoski's reference number: 379]. It is not extant. It is the type genus of Tricrepicephalidae.
It was assigned to Ptychopariida by Sepkoski (2002); and to Tricrepicephalidae by Palmer (1954) and Jell and Adrain (2002).
It was assigned to Ptychopariida by Sepkoski (2002); and to Tricrepicephalidae by Palmer (1954) and Jell and Adrain (2002).
Species
Species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1935 | Tricrepicephalus Kobayashi |
| 1936 | Paracrepicephalus Lochman |
| 1954 | Tricrepicephalus Palmer p. 752 |
| 2002 | Tricrepicephalus Jell and Adrain p. 455 |
| 2002 | Tricrepicephalus 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. †Tricrepicephalus Kobayashi 1935
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†Tricrepicephalus asiaticus Yuan and Yin 1998
Invalid names: Paracrepicephalus Lochman 1936 [objective synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, f = family, c = class | |||||
| References: Hendy 2009, Whittington et al. 1997, Aberhan et al. 2004 | |||||
Age range: base of the Guzhangian to the top of the Paibian or 500.50000 to 494.00000 Ma
Collections (96 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Cambrian | USA (Georgia) | T. cedarensis (164675) | |
| Cambrian | USA (South Dakota) | T. sp. (231) | |
| Menevian | Canada (Yukon) | T. texanus (9874) | |
| Menevian | USA (South Dakota) | T. sp. (8247) | |
| Menevian | USA (Utah) | T. texanus (230681) | |
| Marjumian | Canada (Quebec) | T. sp. 1 (235509) | |
| Marjumian | USA (Nevada) | T. sp. indet. (219682) | |
| Guzhangian | China (Guizhou) | T. asiaticus (125072) | |
| Guzhangian | USA (Texas) | T. coria (208618 208620 208621 208645 208647 208659 208660 208661 208662 208675 208678 208681 208683 208684 208685 208686 208704 208726 208755 208759 208844) T. coria, T. sp. (208984 208986) T. coria, T. texanus (208648 208760 208850) T. coria, T. texanus, T. sp. (208987) T. sp. (208649 208706 208730) T. texanus (208848 208851) T. texanus, T. coria (208668) | |
| Paibian | USA (Texas) | T. coria (208657 208674) | |
| Steptoean | USA (Virginia) | T. cedarensis, T. simplex (6960) | |
| Dresbachian | Canada (Yukon) | T. texanus (55216 55217 55220 55221 55222 55279) | |
| Dresbachian | USA (South Dakota) | T. conia (7184) T. coria (7182 7183 7188 7190 7191 7193 7200 7277 7285 7396 7402 7403 7404 7682 7683 7684 8020 8021 8023) T. coria, T. tripunctatus (7375) T. metra, T. coria (7201) T. sp. (223) T. tripunctatus (7294 7374 7400) T. tripunctatus, T. coria (7199) | |
| Dresbachian | USA (Tennessee) | T. thoosa (235508) T. walcotti (156379) | |
| Dresbachian | USA (Utah) | T. teres (50592) | |
| Dresbachian | USA (Wyoming) | T. coria (8076 8956) T. sp. (224) | |
| Dresbachian | USA (Indiana) | T. sp. (232) | |
| Dresbachian | USA (Wyoming-Montana) | T. sp. (233) | |
| Dresbachian | Canada (Northwest Territories) | T. sp. (25605 25607) | |
| Dresbachian | USA (Missouri) | T. sp. (9625 158316) | |
| Franconian | USA (Wyoming) | T. sp. (8955) | |
| Furongian | USA (Utah) | T. sp. (156413 156419 156425 156479 156480) | |
| Merioneth | USA (Pennsylvania) | T. arcuatus (77689) |