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Dikelocephalus
Taxonomy
Dikelocephalus was named by Owen (1852) [Sepkoski's age data: Cm Trep-l O Trem-u Sepkoski's reference number: 379]. It is not extant.
It was assigned to Trilobita by Walcott (1912); to Dikelocephaliidae by Hughes (1994); to Asaphida by Sepkoski (2002); and to Dikelocephalidae by Jell and Adrain (2002).
It was assigned to Trilobita by Walcott (1912); to Dikelocephaliidae by Hughes (1994); to Asaphida by Sepkoski (2002); and to Dikelocephalidae by Jell and Adrain (2002).
Species
Dicellocephalus angustifrons, Dicellocephalus bilobatus, Dicellocephalus iole, Dicellocephalus marica, Dicellocephalus osceola, Dicellocephalus richmondensis, Dicellocephalus tribulus, D. freeburgensis, D. halli, D. minnesotensis (syn. D. inaequalis, D. raaschi, D. orbiculatus, D. intermidius, D. barretti, D. wisconsinensis, D. gracilis, D. subplanus, D. brevis, D. weidmani, D. thwaitesi, D. granosus, D. postrectus, D. hotchkissi, D. marginatus, D. retrorsus, D. juvinalis, D. beani, D. oweni, Ogygia minnesotensis, D. ovatus, D. edwardsi, D. norwalkensis, D. regalis, D. wiltonensis, D. declivis), D. wisconensis
Synonymy list
| Year | Name and author |
|---|---|
| 1852 | Dikelocephalus Owen p. 574 figs. pl. 1, fig. 1 |
| 1912 | Dicellocephalus Walcott p. 273 |
| 1994 | Dikelocephalus Hughes p. 53 |
| 2002 | Dikelocephalus Jell and Adrain p. 367 |
| 2002 | Dikelocephalus 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. †Dikelocephalus Owen 1852
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†Dicellocephalus angustifrons Walcott 1884
†Dicellocephalus bilobatus Hall and Whitfield 1877
†Dicellocephalus iole Walcott 1884
†Dicellocephalus marica Walcott 1884
†Dicellocephalus osceola Hall 1863
†Dicellocephalus richmondensis Walcott 1884
†Dicellocephalus tribulus Walcott 1912
†Dikelocephalus freeburgensis Feniak 1952
†Dikelocephalus halli Ulrich and Resser 1930
†Dikelocephalus minnesotensis Owen 1852
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Invalid names: Dikelocephalus barretti Ulrich and Resser 1930 [synonym], Dikelocephalus beani Ulrich and Resser 1930 [synonym], Dikelocephalus brevis Ulrich and Resser 1930 [synonym], Dikelocephalus declivis Ulrich and Resser 1930 [synonym], Dikelocephalus edwardsi Ulrich and Resser 1930 [synonym], Dikelocephalus gracilis Ulrich and Resser 1930 [synonym], Dikelocephalus granosus Ulrich and Resser 1930 [synonym], Dikelocephalus hotchkissi Ulrich and Resser 1930 [synonym], Dikelocephalus inaequalis Ulrich and Resser 1930 [synonym], Dikelocephalus intermidius Ulrich and Resser 1930 [synonym], Dikelocephalus juvinalis Ulrich and Resser 1930 [synonym], Dikelocephalus marginatus Ulrich and Resser 1930 [synonym], Dikelocephalus norwalkensis Ulrich and Resser 1930 [synonym], Dikelocephalus orbiculatus Ulrich and Resser 1930 [synonym], Dikelocephalus ovatus Ulrich and Resser 1930 [synonym], Dikelocephalus oweni Ulrich and Resser 1930 [synonym], Dikelocephalus postrectus Ulrich and Resser 1930 [synonym], Dikelocephalus raaschi Ulrich and Resser 1930 [synonym], Dikelocephalus regalis Ulrich and Resser 1940 [synonym], Dikelocephalus retrorsus Ulrich and Resser 1930 [synonym], Dikelocephalus subplanus Ulrich and Resser 1930 [synonym], Dikelocephalus thwaitesi Ulrich and Resser 1930 [synonym], Dikelocephalus weidmani Ulrich and Resser 1930 [synonym], Dikelocephalus wiltonensis Ulrich and Resser 1930 [synonym], Dikelocephalus wisconsinensis Ulrich and Resser 1930 [synonym], Ogygia minnesotensis Chapman 1856 [synonym]
†Dikelocephalus wisconensis Ulrich and Resser 1930
Diagnosis
No diagnoses are available
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, Hendy et al. 2009 | |||||
Age range: base of the Trempealeauan to the top of the Sunwaptan or 490.20000 to 488.90000 Ma
Collections (15 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Cambrian | USA (New York) | D. sp. (254) | |
| Cambrian | USA (Montana) | D. sp. (258) | |
| Franconian | USA (Minnesota) | D. freeburgensis (235396 235397) | |
| Sunwaptan | USA (Minnesota) | D. minnesotensis (233637) | |
| Sunwaptan | Canada (Alberta) | D. oweni (54093) | |
| Sunwaptan | USA (Nevada) | D. minnesotensis (235995) | |
| Trempealeauan | USA (Wisconsin) | D. minnesotensis (54180) D. sp. (255 256) | |
| Trempealeauan | USA (New York) | Dicellocephalus tribulus (74540) | |
| Trempealeauan | USA (Texas) | D. sp. (216017 216018) | |
| Trempealeauan | USA (South Dakota) | D. minnesotensis (9753 9755) |