BLG 144 Chapter Notes - Chapter 33: Lophophore, Trochophore, Ecdysozoa
Document Summary
Morphological traits found in most lophotrochozoan species: a feeding structure called lophophore, a type of larva called trochophore. Lophophore- a specialized structure that rings the mouth and functions in suspension feeding. Are found in three lineages including moss animals, lamp shells, and horseshoe worms. Trochophore- a type of larvae that has a ting of cilia around its middle that allows species to swim and sweep food particles into the mouth. Note: neither lophophores nor trochophores qualify as a synapomorphy. Ecdysozoa are defined by a clear synapomorphy: their method of growth. Moulting- the process of growing by shedding an exoskeleton or external covering. Spe(cid:272)ies i(cid:374) these phyla do(cid:374)"t have a fully fu(cid:374)(cid:272)tio(cid:374)i(cid:374)g (cid:272)oelo(cid:373) (cid:271)e(cid:272)ause they si(cid:373)ply do(cid:374)"t (cid:374)eed o(cid:374)e. Arthropods have segmented bodies that are organized into prominent regions called tagmata. Arthropods have jointed limbs and an exoskeleton made of chitin. Locomotion is based on muscles that apply force against the exoskeleton to move legs or wings.
