[BZ 212] - Midterm Exam Guide - Everything you need to know! (33 pages long)
Document Summary
Sensory organs: cerata, foot, chromatophores, eyes, photoreceptors, tentacles, osphradia. Development: 3types of larvae- trochophore, veliger, glochidium, or direct development. Aplacophorans: no shell- caudoforeata, and solenogastres: rudimentary mantle with no well- developed foot, move by ciliary gliding, few nephridia, less developed all around, secretes calcareous spicules instead of shell, crystalline style, Caudoforeata: dioecious, burrowing animal, eats small organisms, has gills. Solenogastres: hermaphrodite, has a siphon, eats cnidarians, has no gills. Monoplacophora: shallow mantle near foot, repetitive organ arrangement in the mantle cavity, has 1 shell, tentacles around the mouth disc foot, couple pr ctenidia, small head, no eyes, dioecious, crystalline style, dioecious. Polyplacophora: chitons, pallial groove, 7-8 plated shell, many ctenidia, nerve ring, subradular asthete (photoreceptor cup), trochophore larvae, marine, only buccal ganglia, no eyes or tentacles, mantle can cover plates of the shell, crystalline style. Lost right ctenidia and atrium, monopectinate, statocyst, eyes and tentacles, specialized face tentacles with eye spots in few.
