| The amygdaloid body is an ovoid gray nuclear mass, oriented transversely and with a slight posterior concavity. |
| With increasing quantiles, the quadratic coefficient became more negative, implying increased concavity of the inverted parabolic function. |
| The cervical centra are amphicoelous, but do not have the deep, bowl-shaped concavity as in Polycotylus. |
| There is a characteristic anterior pointing and medial concavity of the frontal horns, seen on the coronal scans. |
| In D. herschelensis, the concavity of the articular face of the vertebrae is not as deep as in P. latipinnis. |
| Scanning electron micrographs of the discs of the tube feet of Odontaster validus revealed varying degrees of concavity. |
