Animal Diversity 2

Created by

Kayla

Cards (46)

phylum of basal animals: porifera and cnidaria
phylum porifera have no symmetry, tissues, or organs
phylum porifera are the least complex animals and multicellular
osculum: open end
spongocoel: central cavity, water moves through, food filtered out
porifera have choanocytes
choanocytes: feeding cells of sponges
what clade is phylum porifera in?
metazoa
what clade are phylum cnidaria in?
eumetazoa
cnidaria have true tissue, radial symmetry and are diploblastic
cnidaria have cnidocytes
cnidocytes: specialized stinging cells
Bilateria shared derived traits: bilateral symmetry, triploblastic, nephrozoa
spiralia clade shared derived traits: protostome development
spiralia clade ancestral traits: bilateral symmetry, triploblasty
spiralia clade phylum: platyhelminthes, rotifera, mollusca, annelida
platyhelmithes sdt: dorsoventrally flattened, acoelomate
acoelomate: lacks body cavity
Platyhelminthes are free-living
phylum rotifera sdt: corona, pseudocoelomate
corona: crown of cilia at anterior end
pseudocoelomate: has a body cavity without a true coelem, develops from blastocoel
where are phylum rotifera found?
freshwater/marine and damp soil
phylum mollusca has coelomates and radula
3 coelomates include: mantle, visceral mass, and foot
mantle: thin sheet of tissue covering visceral mass
visceral mass: main body mass, contains internal organs
foot: structure to move
radula: belt of teeth in mouth, used to scrap up food
phylum annelida sdt: repeated segmentation
where is annelida found?
freshwater/marine, soil
ecdysozoan clade sdt: ecdysis
ecdysis: molting - shed external coating during growth
ecdysozoan ancestral traits: bilateral symmetry, triploblast, mostly protostome development
ecdysozoan clade phylums: nematoda and arthropoda
phylum nematoda sdt: pseudocoalomates
nematoda include: roundworms, heartworms, and trichiniosis
nematoda are parasitic
nematoda are found in aquatic and soil
phylum arthropoda sdt: exoskeleton