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Quadrochonetes
Taxonomy
Quadrochonetes was named by Stehli (1954) [Sepkoski's age data: C Mosc-u P Guad-l Sepkoski's reference number: 1]. Its type is Quadrochonetes girtyi.
It was assigned to Svalbardiinae by Williams et al. (2000); and to Strophomenida by Sepkoski (2002).
It was assigned to Svalbardiinae by Williams et al. (2000); and to Strophomenida by Sepkoski (2002).
Species
Q. girtyi (syn. Chonetina quadrata) (type species), Q. praecursor
Synonymy list
| Year | Name and author |
|---|---|
| 1954 | Quadrochonetes Stehli p. 309 |
| 2000 | Quadrochonetes Williams et al. p. 418 |
| 2002 | Quadrochonetes 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.
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 18 | 2.27 | 1.30 | 4.60 | 2.25 | 1.03 |
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| Source: o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Age range: base of the Moscovian to the top of the Capitanian or 315.20000 to 259.51000 Ma
Collections (66 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Moscovian | Bolivia | Q. sp. (151101 151105) | |
| Virgilian | USA (New Mexico) | Q. geronticus (146828) | |
| Virgilian | USA (Illinois) | Q. geronticus (49830) | |
| Asselian | Bolivia | Q. sp. (128569 128629 128631 128632 128634 128636 128637 128638 128639 128648 128649 128650 128651 128652 128653 128657 128658 128659) | |
| Artinskian | Afghanistan | Q. sp. (94962) | |
| Kungurian | USA (Texas) | Chonetes quadratus (151307) Q. girtyi (75864 75865 75881 81592 81724 81726 81848 102627 105996) Q. girtyi, Q. praecursor (81860) | |
| Roadian | Mexico (Coahuila) | Chonetina quadrata (63051) | |
| Capitanian | Mexico (Coahuila) | Chonetina quadrata (62904) | |
| Wuchiapingian | USA (Utah) | Q. n. sp. A (39552 39555 39557 39558 39737 39740) | |
| Wuchiapingian | USA (Nevada) | Q. n. sp. A (39443 39444 39445 39449 39450 39455 39456 39458 39463 39464 39466 39481 39483 39484 39493 39504 39505 39506 39507 39540 39544 39780 39785 39795) |