EEMB 136L Lecture 13: Lab 13
15 Nov 2017
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Document Summary
Regulates the tube feet, which in turn control locomotion, feeding and respiration. Regulated by madreporite (mother pore), a plate on the exterior of the skeleton. Stereom calcium carbonate material pores that makes up the internal skeletons. Readily preserved and make up much of the fossiliferous limestones of the carboniferous period. Developed prior to the development of pentameral symmetry. Mouth is central on the upper surface and protected by several oral plates. Among the earliest echinoderms to appear in fossil. Extinct group of stalked, high-level suspension feeders ( ) In mesozic marine revolution, there is an increases in motility and loss of stalked morphologies. Stalk composed of columnal plates with support a calyx with radiating brachia(arms) Body consists of a calyx from which 5 or more arms radiates. Arms are covered in pinnules which increase filter surface. Anus is located near the mouth on the oral end of the calyx. Large arms with extensions of the coelomic cavity.
