BASAL ANIMAL LINEAGES

what are the lineages for this tree?

proifera, ctenophora, cnidaria, bilateria

what are the two snaps for the entire tree

collagen, blastula

what are the two snaps for porifera

choanocytes- flagella w specialization

spicules- defend and support plant

three snaps for ctenophora, cnidaria, bilateria

radial symmetry, gastrula, diploblastic- ecto and endoderm

snap for cnidaria

chidocytes (stinging)

what is the outgroup of this lineage?

choanoflagelletes

choanoflagelletes

were unicellular, became multicelluar- turned into animal sponges which filter feed

can be sessile or colonial

proifera

1. SPICULES: defend sponge, made of callcium, shape can be used as informative taxnomic feature

2. choanocytes- flagella w speicalization

3. no true tisues or organs

4. no symmetry

5. filter feeders

ctneophora (4)

comb jellies

1. diploblastic

2. complete gut- mouth and anus

3. use cilia to move

SNAP: coloblasts stick cells

cnidaria (4)

jellyfish, sea annenome

1. two way gut- single opening serves as mouth and anus

2. diploblastic

3. stinging cells (cnidocytes)

   1. radially symmetrical

what do cnidaria and ctneophytes share? (3)

diploblastic (no mesoderm), radially symmetryical, gastrulation