Spineless Wonders: A Survey of the Invertebrates

1
Spineless Wonders A Survey of the Invertebrates
2
Phylum Protista
Amoebas, Foraminifera, Radiolaria, etc.
3
Phylum Porifera (Sponges)
Single layer of tissue (collared cells)
4
Phylum Cnidaria / Coelenterata
2 layers of tissue ectoderm, endoderm
5
Phylum Cnidaria / Coelenterata
hard corals
Hydra
sea pens
sea anemones
soft corals
jellyfish
2 tissue layers ectoderm, endoderm
6
Worms - 3 tissue layers ectoderm, mesoderm,
endoderm
7
Phylum Brachiopoda (arm foot)
Key Features pedicle, gut, muscles, lophophore
8
Phylum Bryozoa (moss animals)
Key Features Colonial Habit Have Lophophore
9
Phylum Echinodermata (spiny skin)
Sea urchins
Brittlestars
Crinoids
Starfish
Sea cucumbers
Key Features 5-fold symmetry, calcite plates
10
Phylum Mollusca
HAM (hypothetical ancestral mollusc)
Key Features gut mantle cavity radula
(rasper) gills foot
11
Phylum Arthropoda
Insects Spiders Crabs Lobsters Barnacles Etc.
trilobites
eurypterids
Key Features Jointed appendages 3-fold division
of body (head, thorax, abdomen)
scorpions
shrimps
12
Phylum Mollusca
Gastropods
Bivalves
Cephalopods (squids, octopuses, cuttlefish,
ammonoids)
13
Phylum Hemichordata
Key Characteristics 3-part division of
body (preoral lobe, collar, trunk) Pharynx Gill
slits Stomochord
Pterobranchs
Acorn worms
Graptolites
14
Phylum Chordata
Key Features notochord dorsal nerve cord,
pharynx gills slits post-anal tail
Sea squirts and salps (Urochordates)
Amphioxus (lancelet) (Cephalochordates)
15
END OF LECTURE