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Zygocircus
Taxonomy
Zygocircus was named by Bütschli (1882) [Sepkoski's age data: T Eo-m R]. It is extant.
It was assigned to Acanthodesmiidae by De Wever et al. (2001); and to Nassellaria by Sepkoski (2002).
It was assigned to Acanthodesmiidae by De Wever et al. (2001); and to Nassellaria by Sepkoski (2002).
Species
Species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1882 | Zygocircus Bütschli |
| 1892 | Zygocircus priscus Rüst |
| 1892 | Zygocircus simplicissimus Rüst |
| 2001 | Zygocircus De Wever et al. p. 232 |
| 2002 | Zygocircus 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. Zygocircus Bütschli 1882
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Zygocircus piscicaudatus Popofsky 1913
Invalid names: Zygocircus priscus Rüst 1892 [nomen dubium], Zygocircus simplicissimus Rüst 1892 [nomen dubium]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
No ecological data are available
Age range
Maximum range based only on fossils: base of the Lutetian to the top of the Late/Upper Pleistocene or 48.07000 to 0.01170 Ma
Minimum age of oldest fossil (stem group age): 41.03 Ma
Minimum age of oldest fossil (stem group age): 41.03 Ma
Collections (84 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Lutetian | North Pacific | Z. cimelium (243917 244032 244432 244433 244434 244435 244436 244677 244678 245161 245163 245165 245166 245167 245251 245252 245253 245254 245548 245549 245552) | |
| Lutetian - Bartonian | North Pacific | Z. cimelium (243916 244031 244431) | |
| Bartonian | North Pacific | Z. cimelium (244029 244030 244426 244427 244428 244429 244430 244670 244671 245150 245151 245152 245153 245154 245155 245156 245157 245158 245159 245160 245547 245796 245797) | |
| Miocene - Pliocene | North Pacific | Z. sp. (257601) | |
| Middle Miocene | North Pacific | Z. sp. (253187 253190) | |
| NN9 | North Pacific | Z. sp. (259802) | |
| Pliocene | North Pacific | Z. sp. (262431 266891 266892) | |
| Pleistocene | North Pacific | Z. sp. (248425 248426 248428 248429 248430 248433 253647 253648 253649 253650 264864) | |
| NN19 | North Pacific | Z. sp. (266889) | |
| Jaramillo | North Pacific | Z. sp. (265537 265539 265540) | |
| Jaramillo - Matuyama | North Pacific | Z. sp. (265536) | |
| Matuyama | North Pacific | Z. sp. (265533 265534 265535) | |
| Middle Pleistocene | Japan | Z. piscicaudatus (233640 233708 233709 233711 233712) | |
| Middle Pleistocene | North Pacific | Z. sp. (255106) | |
| Middle Pleistocene - Late/Upper Pleistocene | Japan | Z. piscicaudata (233713) | |
| Late/Upper Pleistocene | North Pacific | Z. sp. (255100 255101 255102) | |
| Late/Upper Pleistocene | Japan | Z. piscicaudatus (233714) |