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Anditrigoniinae
Taxonomy
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 1993 | Anditrigoniinae Leanza pp. 45 - 46 |
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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.
Subfm. †Anditrigoniinae Leanza 1993
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| H. A. Leanza 1993 | Shell small to large in size, mostly pyriform, but also subquadrate to elongate. Flank ornamented by two sets of costae meeting on different parts of the flank forming L-, V- or W-shaped patterns or a combination of these in which tuberculate costae or isolated tubercles may be present. Area practically smooth in early representatives (Eoanditrigonia), later ornamented by transverse costellae near umbo and a smooth distal area (Anditrigonia), faint radial costellae on the area (Paranditrigonia), transverse costellae on the whole surface (Antutrigonia), or transverse costellae near umbo and then radial costellae on the distal area (Virgotrigonia). Marginal carina may be absent (Antutrigonia), only defined in the umbonal region (Eoanditrigonia, Anditrigonia, Paranditrigonia) or continuous along the whole length of the shell (Lambertrigonia, Virgotrigonia). Escutcheon usually wide and smooth, and not very well impressed. |
Measurements
No measurements are available
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| Source: f = family | |||||
| References: Ros-Franch et al. 2014, Aberhan et al. 2004 | |||||
Age range: Kimmeridgian or 154.80000 to 149.20000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Kimmeridgian | Argentina (Neuquen) | Maputrigonia pichimoncolensis (135628) |