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Quadrahomagnostus
Taxonomy
Quadrahomagnostus was named by Chu (1959) [Sepkoski's age data: Cm Dres-l]. It is not extant. Its type is Quadrahomagnostus subquadratus.
It was assigned to Agnostidae by Whittington et al. (1997); and to Agnostida by Sepkoski (2002).
It was assigned to Agnostidae by Whittington et al. (1997); and to Agnostida by Sepkoski (2002).
Species
Q. subquadratus (type species), Q. tienshihfuensis
Synonymy list
| Year | Name and author |
|---|---|
| 1959 | Quadrahomagnostus Chu |
| 1997 | Quadrahomagnostus Whittington et al. p. 349 |
| 2002 | Quadrahomagnostus 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. †Quadrahomagnostus Chu 1959
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†Quadrahomagnostus subquadratus Chu 1959
†Quadrahomagnostus tienshihfuensis Chu 1959
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, o = order | |||||
| References: Hendy 2009, Kiessling 2004 | |||||
Age range: base of the Ayusokkanian to the top of the Taoyuanian or 499.50000 to 486.85000 Ma
Collections (8 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Guzhangian | China (Henan) | Q. tienshihfuensis (126816) | |
| Guzhangian | China (Hebei) | Q. tienshihfuensis (129584) | |
| Guzhangian | China (Hunan) | Q. tienshihfuensis (49177) | |
| Guzhangian | China (Liaoning) | Q. subquadratus (129885) Q. subquadratus, Q. tienshihfuensis (126814) | |
| Ayusokkanian | Kazakhstan | Q. subquadratus (118179 118186) | |
| Taoyuanian | China (Henan) | Q. tienshihfuensis (129214) |