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Changia
Taxonomy
Changia was named by Sun (1924) [Sepkoski's age data: Cm Trep Sepkoski's reference number: 464]. It is not extant. Its type is Changia chinensis.
It was assigned to Ptychaspididae by Jell and Adrain (2002); and to Asaphida by Sepkoski (2002).
It was assigned to Ptychaspididae by Jell and Adrain (2002); and to Asaphida by Sepkoski (2002).
Species
C. chinensis (type species), Quadraticephalus elongatus
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1924 | Changia Sun |
| 1925 | Quadraticephalus Sun |
| 1935 | Coreanocephalus Kobayashi |
| 2002 | Changia Jell and Adrain p. 356 |
| 2002 | Changia Sepkoski |
| 2002 | Coreanocephalus Sepkoski |
| 2002 | Quadraticephalus 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. †Changia Sun 1924
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†Changia chinensis Sun 1924
Invalid names: Coreanocephalus Kobayashi 1935 [synonym], Quadraticephalus Sun 1925 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, o = order, c = class | |||||
| References: Hendy et al. 2009, Whittington et al. 1997, Aberhan et al. 2004 | |||||
Age range: base of the Payntonian to the top of the Warendian or 489.50000 to 478.60000 Ma
Collections (16 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Furongian | South Korea | C. sp., Quadraticephalus elongatus (232039) Quadraticephalus elongatus (232036 232037 232038) | |
| Payntonian | Australia (Northern Territory) | Coreanocephalus sp. (77435 77438) Coreanocephalus sp., Quadraticephalus sp. (77416) Quadraticephalus sp. (77530 77649) | |
| Niuchehean | China (Anhui) | C. sp. (127321) | |
| Niuchehean | China (Hebei) | Quadraticephalus sp. (129619) | |
| Niuchehean | China (Henan) | C. sp. (129217 129220) C. sp., C. chinensis (129219) | |
| Tremadoc | China (HeNan) | C. sp. (20767) | |
| Warendian | Australia (Northern Territory) | Quadraticephalus sp. (77712) |