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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Gemmarcula arizonensis
Taxonomy
Gemmarcula arizonensis was named by Cooper (1955). Its type specimen is USNM NO. 124197a, a shell, and it is a 3D body fossil. Its type locality is Small hill opposite Glance Canyon mouth, 0.2 miles off US-80, which is in an Albian reef, buildup or bioherm rudstone in Arizona.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1955 | Gemmarcula arizonensis Cooper p. 7 figs. Pl. 2a, Fig. 1-28; Pl. 4b, Fig. 3-6 |
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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.
†Gemmarcula arizonensis Cooper 1955
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 7 | 5.52 | 2.60 | 8.70 | 6.40 | 2.07 |
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| Source: f = family, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Age range: Middle Albian or 110.10000 to 106.30000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Albian | USA (Arizona) | Gemmarcula arizonensis (type locality: 153324) |