Table 3. Morphological traits observed in the gastric teeth of Trichodactylidae species.
The data about the natural diet of each species refers to the most important trophic resource (animal or vegetal) used by each species.
| Species | Medial tooth | Lateral teeth | Accessory teeth | Cardiopyloric valve | Diet | |
|---|---|---|---|---|---|---|
| Dilocarcininae tribe Dilocarcinini | Dilocarcinus pagei | Marked transverse ridges (4–5) Lateral spines present |
Flattened | Vestigial | W-shaped Pronounced with two ridges |
Greater importance of plant items |
| Dilocarcinus septemdentatus | Marked transverse ridges (3) Lateral spines present |
Slightly cuspidate (8) | Vestigial | W-shaped Faint without ridges |
– | |
| Poppiana argentiniana | Marked transverse ridges (3) Lateral spines present |
Flattened (7) | Vestigial | W-shaped Pronounced without ridges |
– | |
| Dilocarcininae tribe Valdiviini | Zilchiopsis collastinensis | Faint transverse ridges (3) Lateral spines present |
Flattened (7–8) | 4 softly cuspidate teeth | – | – |
| Sylviocarcinus australis | Transverse ridges screw-like (3) | Incisor cusps (7–8) | 3 softly cuspidate teeth | W-shaped Pronounced without ridges |
– | |
| Sylviocarcinus devillei | Transverse ridges screw-like (4) | Incisor cusps (9–10) | Vestigial | W-shaped Faint without ridges |
– | |
| Trichodactylinae | Trichodactylus borellianus | Without transverse ridges Cubical and flattened Lateral spines present |
Sharp cusps (4–5) Medial hollow |
Vestigial 1 softly cuspidate teeth |
Smooth | Both animal and vegetable items |
| Trichodactylus kensleyi | Without transverse ridges Cubical and flattened Lateral spines present |
Sharp cusps (4–6) Medial hollow |
Vestigial 1 softly cuspidate teeth |
Smooth | Both animal and vegetable items | |
| Trichodactylus fluviatilis | Without transverse ridges Cubical and flattened Lateral spines absent |
Sharp cusps (4–6) Medial hollow |
Vestigial 2-3 softly cuspidate teeth |
Smooth | Both animal and vegetable items |