final set for the maron final

Phylum Arthropoda

Jointed legs • Exoskeleton • Segmented body

Thalassinideans

Burrowing shrimp/ lobster like/ long bodies modified for digging

Subphylum Chelicerata

No antennae • Chelicerae • Eight legs

Class Euchelicerata

True chelicerates, first pair of appendages, horseshoe crabs

Subclass Merostomata (Xiphosura)

Horseshoe crabs • Long tail spine

Suborder Pleocyemata

females brood fertilized eggs by attaching them to their swimming legs (pleopods) until the larvae hatch

Class Pycnogonida

Sea spiders • Tiny body • Long legs

Subphylum Crustacea

Two pairs of antennae • Mostly aquatic

Class Ostracoda

Seed shrimp • Bean-shaped shell

Class Branchiura

Fish lice • Parasites

Class Branchiopoda

Leaf-like legs • Mostly freshwater

Subclass Anostraca

Fairy shrimp • No carapace • Swim upside down

Subclass Phyllopoda

Leaf-like swimming legs

Order Notostraca

Tadpole shrimp • Horseshoe-shaped shield

Order Diplostraca

Clam shrimp & water fleas

Cladocera

Water fleas • Large single eye

Clam shrimp

Bivalve-like shell

Class Copepoda

Tiny plankton • Long antennae • No carapace

Order Calanoida

Long antennae • Open water plankton

Order Cyclopoida

Short antennae • Freshwater

Order Harpacticoida

Bottom-dwelling copepods

Subclass Cirripedia

Barnacles • Cemented to rocks • Volcano-shaped shell

Class Malacostraca

Crabs, shrimp, lobsters • Largest crustaceans

Subclass Phyllocarida (Leptostraca)

Primitive shrimp-like crustaceans

Subclass Hoplocarida (Stomatopoda)

Mantis shrimp • Powerful smashing claws

Order Euphausiacea

Krill • Whale food

Order Decapoda

Ten walking legs

Suborder Dendrobranchiata (Penaeidea)

Penaeid shrimp • Gills branch like tree

Infraorder Pleocyemata

Crabs, lobsters, true shrimp • Eggs carried under abdomen

Infraorder Caridea

True shrimp • Bent abdomen

Infraorder Achelata

Spiny & slipper lobsters • No large claw

Infraorder Anomura

Hermit crabs & king crabs • Uneven abdomen

Infraorder Brachyura

True crabs • Short folded tail

Order Mysida

Opossum shrimp • Brood pouch

Order isopoda

Pill bugs • Flattened top-to-bottom

Order Amphipoda

Side-swimmers • Flattened side-to-side

Suborder Gammaridea

Typical scud amphipods

Suborder Senticaudata

Skeleton shrimp & relatives

Suborder Hyperiidea

Planktonic amphipods • Large eyes

Phylum Hemichordata

Acorn worms • Proboscis • Related to echinoderms

Class Enteropneusta

Acorn worms • Burrow in sanD

Phylum Echinodermata

Tube feet • Water vascular system • Five-part symmetry

Class Asteroidea

Sea stars • Thick arms

Class Ophiuroidea

Brittle stars, distinct central disc

Class Echinoidea

Sea urchins & sand dollars • No arms , hard teste, spines, tube feet

Class Holothuroidea

Sea cucumbers • Soft elongated body

Class Crinoidea

Many feathery arms, mouth faces upward,

Phylum Chordata

Notochord • Dorsal nerve cord • Gill slits

Subphylum Urochordata

Tunicates • Sac-like filter feeders

Notochord and nerve cord most obvious in larva

Class AscidiaceA

Sea squirts • Attached adults, filter feeders

Class Thaliacea

Salps • Free-swimming barrel-shaped colonies

Class Larvacea

Tiny free-swimming tunicates • Keep larval tail throughout life

Class Theocostraca

Barnacles, crustacean, sessile, protective calcareous shell/plates