Invert Classification

Classes within Phylum Cnidaria

Hydrozoa, Scypnozoa, Cubozoa, Hexacorallia, and Octocorallia

Species within Class Hydrozoa

Man o war

Species within Class Scypozoa

• true jellies

• moon jelly, stinging nettle, pink meanie

Species within Class Cubozoa

Box jellies

Species within Class Hexacorallia

stony corals

Species within Class Octocorallia

soft coral

What animals can you find in the Phylum Platyhelminthes

flat worms

What animals can you find in the Phylum Porifera

sponges

What are the different kinds of sponges

glass sponge, boring sponge, encrusted sponge

Ostia

pores in a sponge that allow water to enter the body

Choanacytes

• aka collar cells

• traps food particles

Osculum

top of sponge where water leaves the body after filter feeding

what kind of symmetry do sponges have

asymmetrical

what kind of symmetry do cnidarians have

radial symmetry

what are the two body forms of cnidarians

polyp and medusa

what are the two tissue layers of cnidarians

epidermis and gastrodermis

nematocytes

stinging cells on tentacles

What animals can you find in the Phylum Ctenophora

Comb jellies - ctenophores

what kind of symmetry do ctenophores have

radial symmetry

do ctenophores have nematocytes

no

what kind of symmetry do flatworms have

bilateral symmetry

what 3 tissue layers do flatworms have

epiderm, mesoderm, and endoderm

T/F Flatworms have a body cavity.

False

examples of flatworms

parasitic flukes (nemotodes), tape worms, and free-living flatworms

coelom

• fluid filled body cavity lined with mesodermal tissue

• allowed for organ evolution

What animals can you find in the Phylum Nematoda

nematodes

Psuedocoelomate

fluid filled body cavity not lined with mesoderm

what kind of symmetry do nemotodes have

bilateral symmetry

hydrostatic skeleton

fluid pushes against muscles in body

example of nemotodes

round worms

What animals can you find in the Phylum Nemertea

ribbon worms

T/F Ribbon worms have proboscis

true

ribbon worms have a complete ______ with a mouth and anus.

digestive tract

What animals can you find in the Phylum Annelida

segmented worms

what kind of circulatory system do segmented worms have

closed circulatory system

Polychaetes

• largest and most diverse group of segmented worms

• have parapodia that includes gills and bristles

examples of polychaetes

fire worms, fan worms, and lug worms

what species are found in the class Hirudinea

leeches

what species are found in the class gastropoda

snails, limpets, sea slugs

what does “gastropoda” mean

stomach-foot

what species are found in the class bivalvia

clams, oysters, scallops, mussels, etc

what does water enter and exit the mantle of a bivalve

via siphons

what species are found in the class cephalopoda

squid, octopus, cuttlefish

what does “cephalopod” mean

head-footed

what species are found in the class polypacopnora

chitons

what species are found in the class scaphopoda

tusk shells

which phylum has the largest number of species

phylum arthropoda

what animals can you find in the phylum arthropoda

copepod, isopod, barnacle, shrimp, lobster, etc

cephalothorax

head and thorax fusion

amphipods are also known as

beach hoppers

Decopods

• 10 legs

• largest crustacean group

what species are found in the class merastomata

horseshoe crabs

what symmetry do organisms in the phylum echnodermata have

pentaradial symmetry

what does “echinodermata” mean

spiny skin

how do organisms within the phylum echinodermata move

they move due to an internal water vascular system that couples with tube feet

what species are found in the class asteroidea

sea stars

examples of sea stars

gray sea star, banded sea star

what species are found in the class ophiuroidea

brittle stars

what species are found in the class echinoidea

sea urchins, sand dollars

Aristotle’s lantern

feeding structure of jaws and muscles found on echinodea

what species are found in the class holothuroidea

sea cucumbers

what species are found in the class crinoidea

sea lilies, feather stars

What are the 2 inverts found in the phylum chordata

lancelet and tunicate

what characteristics do organisms in chordata have to have

• post-anal tail

• gill slits

• notochord

• one hollow, dorsal nerve cord

what species are found in the subphylum urochordata

tunicates

ex: sea squirts, ascidians

what species are found in the subphylum cephalochardata

lancelets