OTHER DEUTEROSTOMES (Other deuterostome study images;
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c) Ph. BRYOZOA (moss animals) approx. ~5,000 marine and freshwater spp; encrusting colonial animals with polyp-like zooids that extend out of a gelatinous, leathery or calcareous exoskeleton; particles are captured by lateral cilia or tentacular flicking
d) Ph. BRACHIOPODA (lamp shells) approx. ~350 marine spp; solitary animals enclosed by paired (dorsal and ventral!) shells and bearing a stalk-like pedicle; a coiled slow-pumping lophophore maximizes feeding efficiency vs rate; most went extinct 225 MYA; some have a blind gut (no anus!)
b) the Cl. Enteropneusta (acorn worms) ~70 marine spp;
Copyright (c) 2007 by A. Richard Palmer. All rights reserved.
(revised Jan. 28, 2007)