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Arechia
Taxonomy
Arechia was named by Cappetta (1983) [Sepkoski's age data: T Eo-l T Eo-m Sepkoski's reference number: 884]. It is not extant. Its type is Arechia arambourgi.
It was assigned to Myliobatiformes by Sepkoski (2002); to Dasyatoidea by Cappetta (1987), Noubhani and Cappetta (1997) and Tabuce et al. (2005); to Urolophidae by Marramà et al. (2020); and to Urotrygonidae by Adnet et al. (2020).
It was assigned to Myliobatiformes by Sepkoski (2002); to Dasyatoidea by Cappetta (1987), Noubhani and Cappetta (1997) and Tabuce et al. (2005); to Urolophidae by Marramà et al. (2020); and to Urotrygonidae by Adnet et al. (2020).
Species
A. arambourgi (type species), A. crassicaudata
Synonymy list
| Year | Name and author |
|---|---|
| 1983 | Arechia Cappetta |
| 1987 | Arechia Cappetta p. 167 |
| 1997 | Arechia Noubhani and Cappetta p. 107 |
| 2002 | Arechia Sepkoski |
| 2005 | Arechia Tabuce et al. p. 387 |
| 2020 | Arechia Adnet et al. p. 37 |
| 2020 | Arechia Marramà et al. p. 2 |
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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. †Arechia Cappetta 1983
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†Arechia arambourgi Cappetta 1983
†Arechia crassicaudata de Blainville 1818
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. Marramà et al. 2020 | Small teeth up to 2.8 mm wide, and broader than long; crown high, not cuspidate; enameloid surface smooth; edge of the labial and lingual visors convex, sometimes with a weak central concavity or notch; high, sharp, lingually displaced transverse cutting crest that does not reach the blunt lateral angles and having a constriction at its origin; root lower than crown and slightly expanded mesiodistally; basal face of the lobes slightly convex and joining feebly at the labial face of the root that is oblique and straight; root lobes divergent and divided by a broad and deep furrow; root with a large central foramen and paracentral foramina; scattered foramina on the labial face of the root. |