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Kirkbya subquadriforma
Taxonomy
Kirkbya subquadriforma was named by Ishizaki (1964). Its type specimen is IGPS 85781, a valve (Left valve), and it is a 3D body fossil. Its type locality is Iwaizaki, Member G, Hashikami Village, Motoyoshi County, Miyagi Prefecture, which is in a Capitanian carbonate limestone in the Iwaizaki Formation of Japan.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1964 | Kirkbya subquadriforma Ishizaki p. 149 figs. Pl 16, fig 11; pl 17, fig 8 |
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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.
†Kirkbya subquadriforma Ishizaki 1964
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| valve height | 2 | 0.862 | 0.790 | 0.940 | 0.865 | 0.106 |
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| Source: o = order, c = class | |||||
| References: Alvarez et al. 2008, Kiessling 2004 | |||||
Age range: Capitanian or 264.28000 to 259.51000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Capitanian | Japan | Kirkbya subquadriforma (type locality: 109844) |