Medium to large starfish with very long and slender arms and a relatively broad and flattened central disc.  Arms may be slightly upturned towards the tips.  Ranges through the White Chalk, but articulated material is very scarce.

1).  Ophryaster cf. magnus; Aboral view of a large and well preserved specimen (x0.9, White Chalk, BMNH (British Museum (Natural History) London) Earth Lab display specimen).  Image © 2006 The Natural History Museum, by kind permission.

2).  Detail of the central disc of the above specimen (x2.0, White Chalk, BMNH (British Museum (Natural History) London) Earh Lab display specimen.  Image © 2006 The Natural History Museum, by kind permission.