Stromatocystites walcotti
Stromatocystites walcotti The earliest known representative of the echinoderm (Echinodermata) group the Edrioasteroidea. It had a pentagonal shape with five distinct ‘arms’ apparent on the surface of a flexible, many-plated test. It existed during the Lower Cambrian.
More From encyclopedia.com
Echinoidea , Echinoidea (sea urchins, sand-dollars, heart urchins; phylum Echinodermata, subphylum Echinozoa) A class of free-living echinoderms in which the body… Crinoids , Crinoidea (crinoids; subphylum Crinozoa; phylum Echinodermata) The most primitive living class of echinoderms, whose members are either stalked (sea… Zooneuston , zooneuston Those animals associated with the surface of water, mainly in freshwater habitats, and influenced by surface tension. The group is divided… Arm , arm1 / ärm/ • n. 1. each of the two upper limbs of the human body from the shoulder to the hand. ∎ (in technical use) each of these upper limbs from… Surface Tension , Surface tension, in physics, is an effect within a liquid’s surface layer, which causes the layer to possess characteristics similar to elastic. For… Potentiometric Surface , Skip to main content
potentiometric surface
You Might Also Like
NEARBY TERMS
Stromatocystites walcotti