|
Protasterina
|
|
|
Glass, Alexander, 2006, Pyritized tube feet in a protasterid ophiuroid from the Upper Ordovician of Kentucky, U. S. A., Acta Palaeontologica Polonica 51 (1), pp. 171-184
: 177-179
|
177-179 |
|
Protasterina flexuosa
|
|
|
Glass, Alexander, 2006, Pyritized tube feet in a protasterid ophiuroid from the Upper Ordovician of Kentucky, U. S. A., Acta Palaeontologica Polonica 51 (1), pp. 171-184
: 179-180
|
179-180 |
