Bios 173

Front 1

Phylum Porifera

Back 1

Porous body with a system of water canals; specialized cells, but no tissues or organs; intracellular digestion

Front 2

Class Calcarea

Back 2

Skeleton of calcium carbonate spicules (calcareous sponges - all small)

Front 3

Class Hexactinellida

Back 3

Skeleton of siliceous, 6-rayed spicules. (glass sponges)

Front 4

Class Demospongiae

Back 4

Skeleton of spongin fibers, siliceous spicules, both, or neither (marine bath sponges, freshwater sponges, carnivorous sponge)

Front 5

Phylum Cnidaria

Back 5

Radial symmetry and two tissue later construction; with a gastrovascular cavity and tentacles equipped with nematocysts.

Front 6

Class Hydrozoa

Back 6

usually with both polyp and medusa generations (Hyria, Obelia, Gonionemus)

Front 7

Class Scyphozoa

Back 7

Medusa predominant and polyp reduced or absent (Aurelia)

Front 8

Class Anthozoa

Back 8

Polyp only; no medusa (sea anemones, all corals, sea fan, sea whip, sea plume)

Front 9

triploblastic

Back 9

animals with three tissue layers

Front 10

Domain Eukarya

Back 10

Eukaryote organisms with a membrane-bound nucleus

Front 11

Phylum Platyhelminthes

Back 11

Flatworms; three tissue layers; incomplete digestive tract

Front 12

Class Turbellaria

Back 12

Free-living and commensal flatworms (Planaria)

Front 13

Class Trematoda

Back 13

Flukes. All are parasites (Clonorchis)

Front 14

Class Cestoda

Back 14

Tapeworms. All parasitic; ribbon-like body divided into proglottids (Dipylidium)

Front 15

Pseudocoelomates

Back 15

A fluid-filled body cavity lacking a complete mesodermal lining. A complete digestive system; cuticle; and cell constancy are typical

Front 16

Phylum Nematoda

Back 16

Roundworms. Free-living and parasitic; whip-like movements due to longitudinal muscles. (Ascaris, vinegar eel)

Front 17

Protostome coelomates:

Back 17

Mouth is formed from the blastopore of the gastrula; cleavage is determinate; in most the mesoderm splits to form the coelom (schizocoely)

Front 18

Phylum Mollusca

Back 18

Soft body consisting of anterior head, dorsal visceral mass and ventral foot; mantle secretes hard shell in most; radula present in some.

Front 19

Class Polyplacophora. chitons.

Back 19

Oval body; eight dorsal shell plates; broad foot; radula

Front 20

Class Bivalvia. clams, mussels, oysters, scallops

Back 20

Dorsally-hinged shell; filter feeders.

Front 21

Class Gastropoda. snails, slugs, whelks, conchs, sea hares.

Back 21

Body and shell coiled; broad foot; well-developed head; radula

Front 22

Class Cephalopoda. squid, cuttlefish, octopus, nautilus

Back 22

large head, foot modified for eight or more tentacles (arms) surrounding mouth; complex eye, similar to vertebrate eye.

Front 23

Phylum Annelida - segmented worms

Back 23

setae; large coelem; well-developed nervous, muscular, circulatory, digestive, and excretory systems

Front 24

Class Oligochaeta - earthworms and aquatic oligocheates.

Back 24

Head reduces; few setae per segment; clitellum; hermaphroditic; (Lumbricus)

Front 25

Class Polychaeta - clamworms and other marine polycheates

Back 25

Lateral appendages (parapods) with many setae per segment; well-developed head

Front 26

Class Hirudinea - leeches

Back 26

Blood-sucking external parasite; anterior and posterior suckers; lack setae; clitellum during reproductive season; hermaphroditic

Front 27

Phylum Onychophora

Back 27

velvet worms, closely linked to the arthropods and tartigrades, interesting lobe-like legs and slime glands

Front 28

Phylum Tardigrada

Back 28

water bears; closely related to onychophorans and arthropods; interesting ability to enter a suspended state called crytobiosis

Front 29

Phylum Arthropoda

Back 29

Segmented; serially homologous, jointed appendages; chitinous exoskeleton; highly developed nervous, sensory systems

Front 30

subphylum trilobita

Back 30

Extinct - armored arthropods, with a flat, ovoid, 3-part body

Front 31

Class Trilobita

Back 31

Fossil Trilobites

Front 32

Subphylum Crustacea

Back 32

Arthropods with 2 pair of antennae; mandibles; biramous appendages; gills.

Front 33

Class Crustacea.

Back 33

crayfish, lobster, crab, shrimp, isopods (pillbugs)

Front 34

Class Cladocera

Back 34

Waterflea

Front 35

Subphylum Hexopoda

Back 35

Single pair of antennae; mandibles; unbranched (uniramous) appendages; tracheae

Front 36

Class Insecta

Back 36

bees, beetles, wasps, grasshoppers, moths, butterflies, mantids, flies. pairs of legs, some have 1 or 2 pairs of wings. Single pair of antennae, mandibles; unbranched (uniramous) appendages; tracheae

Front 37

Subphylum Myriopoda

Back 37

.

Front 38

Class chilopoda

Back 38

centipedes - 1 pair of legs per segment

Front 39

Class Diplopoda

Back 39

millipedes - 2 pairs of legs per segment

Front 40

Subphylum Chelicerata

Back 40

Mouthparts are pincer-like chelicerae; no mandibles; no antennae; book lungs.