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 ...

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 ...

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 ...

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.

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

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 ...

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.) ...