Metechinus amplior (extinct)
Found in one sample
United States: Observation Quarry (Middle Miocene)
Size measurements:
| m1 length | 5.3 mm | N = 1 | Rich 1981 |
| m1 length | 5.0 mm | N = 1 | Rich 1981 |
| m1 length | 6.1 mm | N = 1 | Rich 1981 |
| m1 length | 5.8 mm | N = 1 | Rich 1981 |
| m1 length | 6.0 mm | N = 1 | Rich 1981 |
| m1 width | 3.8 mm | N = 1 | Rich 1981 |
| m1 width | 3.2 mm | N = 1 | Rich 1981 |
| m1 width | 3.9 mm | N = 1 | Rich 1981 |
| m1 width | 3.6 mm | N = 1 | Rich 1981 |
| m1 width | 3.8 mm | N = 1 | Rich 1981 |
| m2 length | 4.0 mm | N = 1 | Rich 1981 |
| m2 length | 4.1 mm | N = 1 | Rich 1981 |
| m2 length | 4.1 mm | N = 1 | Rich 1981 |
| m2 length | 4.3 mm | N = 1 | Rich 1981 |
| m2 width | 2.6 mm | N = 1 | Rich 1981 |
| m2 width | 2.9 mm | N = 1 | Rich 1981 |
| m2 width | 2.6 mm | N = 1 | Rich 1981 |
| m2 width | 2.5 mm | N = 1 | Rich 1981 |
| p4 length | 2.3 mm | N = 1 | Rich 1981 |
| p4 length | 2.7 mm | N = 1 | Rich 1981 |
| p4 length | 2.4 mm | N = 1 | Rich 1981 |
| p4 length | 2.2 mm | N = 1 | Rich 1981 |
| p4 width | 2.9 mm | N = 1 | Rich 1981 |
| p4 width | 2.1 mm | N = 1 | Rich 1981 |
| p4 width | 1.8 mm | N = 1 | Rich 1981 |
| p4 width | 2.1 mm | N = 1 | Rich 1981 |
See also Metechinus