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Gemmarcula
Taxonomy
Gemmarcula is a genus. It is not extant. It is the type genus of Gemmarculinae.
It was assigned to Terebratulida by Sepkoski (2002); and to Gemmarculinae by Williams et al. (2006).
It was assigned to Terebratulida by Sepkoski (2002); and to Gemmarculinae by Williams et al. (2006).
Species
Species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1959 | Trifidarcula Elliott p. 147 |
| 2002 | Gemmarcula Sepkoski |
| 2002 | Trifidarcula Sepkoski |
| 2006 | Gemmarcula Williams et al. p. 2213 |
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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. †Gemmarcula
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†Gemmarcula arizonensis Cooper 1955
†Gemmarcula canaliculata Roemer and d'Archiac 1840
†Gemmarcula doddsae Craig 1999
†Gemmarcula menardi Lamarck 1819
†Gemmarcula plattenwaldensis Sulser and Friebe 2002
Invalid names: Trifidarcula Elliott 1959 [synonym]
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| height | 8 | 10.5 | 6.20 | 14.5 | 11.7 | 3.20 | |
| 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: base of the Late/Upper Aptian to the top of the Late/Upper Maastrichtian or 119.57000 to 66.00000 Ma
Collections (19 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Aptian | United Kingdom (England) | G. aurea (1854 1856) G. aurea, Trifidarcula trifida (1841 1857) Trifidarcula trifida (1840 1850) | |
| Late/Upper Aptian | United Kingdom (England) | Terebratella trifida (233512 233513) | |
| Early/Lower Albian | United Kingdom (England) | G. menardi (1864) | |
| Early/Lower Albian | Austria | G. plattenwaldensis (157093 157095 157096) | |
| Middle Albian | USA (Arizona) | G. arizonensis, G. menardi (153324) | |
| Late/Upper Albian | Romania | G. sp., G. canaliculata (60486) | |
| Cenomanian | France (Charentes) | G. menardi (64881) | |
| Cenomanian | United Kingdom (England) | G. mernardii (81060) | |
| Early/Lower Cenomanian | France (Poitou-Charentes) | G. menardi (73863) | |
| Santonian | Australia (Western Australia) | G. doddsae (153503) | |
| Late/Upper Maastrichtian | Kazakhstan (Kustanai) | G. humboldtii (186858) |