Echinoderms such as starfish are unusual for their five-fold body symmetry. Maps of gene-expression patterns show how this body plan was acquired, and that the genes specifying head structures do ...

Starfish are echinoderms, a form of invertebrate marine animals known for radial symmetry and having spiny skin. Researchers said most animal species have similar genetic structures, prompting ...

Introduction to the Paleontological Society short course 'Geobiology of echinoderms' / N. Gary Lane -- Living comatulids / Charles G. Messing -- Implications of research on living stalked crinoids for ...

The Extraxial/Axial Theory (EAT) of echinoderm skeletal homologies describes two major body wall types: axial and extraxial. The latter is subdivided into perforate and imperforate regions. Each of ...

Scientists are retracing the journeys of century-old Antarctic expeditions to discover how the Earth has changed.

Some of us never grow up. In fact I am writing this now in my Aquaman pajamas while laying on Return of the Jedi bedsheets*. Unlike my childlike tendencies, for other species sometimes delayed growth ...

Like sea stars, ancient echinoderms nibbled with tiny tube feet Rare 430-million-year-old fossils preserve signs of these tentacle-like limbs ...

This is a preview. Log in through your library . Abstract The new Class Coronoidea is proposed to include five genera of Ordovician-Silurian blastozoan echinoderms--Stephanocrinus, Mespilocystites, ...

- they lack a hard endoskeleton unlike other echinoderms. - tube feet have been modified into tentacles around mouth which aid in feeding. - 5 rows of tubercles run from mouth to anus indicate ...

The recent Invertebrate Wars reminded me of spectacular, but often ignored, group of gastropods. The parasites! This is a group that I have totally geeked out on in the past. In my previous work I ...

This triumph in deeply rooted growth is announced in the echinoderms; I wonder what Fibonacci would ascertain with a sand dollar in hand. (Please, readers, correct the number if not correct.) ...