Poraniidae sp.
Poraniidae sp.
Poraniidae is a family of starfishes in the order Valvatida.
Members of this family have a moderately well-developed row of marginal plates forming a distinct margin along the edge of both disc and arms. The aboral surface is covered with thick, naked skin, free from spines or pedicellariae but with scattered groups of papulae. There are no papulae or pedicellariae on the oral surface and the tube feet are always in two series.
Method
Video capture of the specimen suspended by a thread and maintained as motionless as possible by two another thread on the bottom arms. The camera was rotating around the organism to minimize the risks of movement.
The video was uploaded in Metashpe by Agisoft where frames (350) were automatically extracted before being processed and modelled.
Comments:
The video capture gives a very precise reconstruction in terms of shape, but most of the details on the surface got blurred with the processing, due to the extraction of frames from the video. The frames can't be as sharp as when the photos are taken with a camera.