Arthropoda Table

Below is one side of the Arthropoda table filled out (I didn't do the other side, but you don't have to know all the orders and details of Hexapoda).

Subphylum Class Order

Trilobita Extinct for 200 million years

Chelicerata

Crustacea

Merostomata

Arachnida

Pyconogonida (Greek-thick knees or all legs)

Malacostraca

Maxillopoda

Branchiopoda

Decapoda

Euphausiacea

Amphipoda

Isopoda

Copepoda (subclass)

Cirripedia

Anostraca

Cladocera

Common Names

Trilobites No living spp.

Horseshoe crab (Limulus)

Spiders, scorpions, mites, ticks

Sea spiders

Crab, crayfish, shrimp, lobster

Krill

Parasitic,  pill bugs

Calanus, Cyclops, Diaptomus

Barnacles

Fairy & Brine shrimp

Water fleas - Daphnia

Appendages Chelicerae Pedipalps Mandibles Antennae Walking legs

# of pairs 1-antennae 4-leglike appendages

# of pairs 1-chelicera 1-pedipalps 4-legs 0-antennae 0-mandible

# of pairs 1-chelicera 1-pedipalps 4-legs 0-antennae 0-mandible

# of pairs 1-chelicera 1-pedipalps 1-oviger-male 5-6- legs

# of pairs 2-antennae 1-mandible 2-maxillae 3-maxilliped 1-cheliped (also walking leg) 5-walking legs   (1 is cheliped) 3-5-swimmerets (first in male=copulatory)

0-maxillipeds

# of pairs 1-2- antennae 1-maxillipeds (uniramous) 4-thoracic swimming appendages (biramous)

Flattened & leaf-like legs: chief respiratory organs

Tagmata

Head (cephalon) Trunk Pygidium

Cephalothorax (carapace-shell) Opisthosoma (abdomen)

Prosoma (cephalothorax) Opisthosoma (abdomen)

Cephalon (small head) Thorax Abdomen (reduced)

Decapod(fused) Head -5 (fused) somites Thorax-8 (fused) somites Abdomen-6 somites

Body-dorso-ventrally flattened

Head-reduced No Abdomen Thoracic legs are long with hair-like setae

Cuticle

Carapace

Carapace

Sensory hairs

Carapace

No-Car

No-Car

No-Car

Lack carapace

Calcareous plates

Sense Organs

Compound eyes

Compound eye & simple eye

8 simple eyes

4 simple eyes

Compound eyes

Simple, median eye

Unique structures

Telson, Carapace, hinge, gills,

Book lung, spinnerets

Proboscis

Crayfish - rostrum, posterior telson, carapace, uropod, antennal gland (green gland)

Free-living consumer- marine plankton &freshwater plankton Parasitic forms-  unrecognizable

Parasitic= kentrogon stage

Reproduction

Dioecious

Dioecious

Dioecious

Hermaphroditic – big penis Monoecious

Partheno-genesis – w/out males

Larvae

Zoeaà megalopaà crab Crayfish=direct development

Nauplius

Nauplii Cyprid-bivalve carapace

Gradual metamor-phosis

Direct develop-ment

Habitat

Marine

Marine

Terrestrial

Marine

Aquatic

Both