Chapter 20: Crustaceans

modern examples of crustaceans

ebirah and eugene

crustaceans are known as

insects of the sea

crustacea roots

crusta (shell)

crustaneans have ___ pairs of antennae

two

crustaneans have ___ pairs of mandibles

one

crustaneans have ___ pairs of maxillae

two

crustaneans have ____ appendages on each segment

paired, biramous

crustanean segments fuse to form a

cephalothorax

crustanean carapace

hard protective covering

crustaneans covered in

cuticle

crustanean cuticle made of

chitin, protein, calcium carbonate

crustanean joints

soft for movement

crustanean segments outside carapace covered by

tergum (dorsal) and sternum (ventral) plates

crustanean females have ____ for sperm reception

gonophores

crustanean appendages described as

serial homolgy

crustanean appendages

protopod, exopod, endopod, exites, endites, uropod

crustanean protopod

base of limb
coxa + basis

crustanean exopod

lateral branch

crustanean endopod

medial branch

crustanean exites and endites

lateral/medial extensions

crustanean uropod

tail fin

crustanean circulatory system

open with hemolymph

crustanean respiratory pigments

hemocyanin/hemoglobin (colorless, red, or blue)

crustanean ____ heart pumps fluid

dorsal tubular

crustanean excretion

antennal/maxillary glands

crustanean nitrogenous waste excreted via

cuticle and gills

crustanean muscular system described as

antagonist groups

crustanean musclar system

flexors and extensors

crustanean flexors

draw parts inward

crustanean extensors

extend parts outward

small crustacean respiratory system

cuticle

large crustacean respiratory system

gills

crustanean brain

supraesophageal and subesophagea ganglia

crustanean eyes

ommatidia create mosaic images

crustanean statocysts

balance

crustanean tactile hairs

touch

crustanean reproduction

separate sexes, some parthenogenetic

crustanean ___ their eggs

brood

crustanean development

direct or multiphasic

crustanean larva

nauplius

ecdysis

shedding cuticle for growth/due to wear

crustanean layers of cuticle

epicuticle, procuticle, endocuticle

crustanean epicuticle

outer, lipid-protein layer

crustanean procuticle

bulk of the cuticle

crustanean endocuticle

chitin-rich innermost layer

crustanean premolt

old cuticle detaches, new cuticle forms

crustanean postmolt

new cuticle expands and hardens

crustanean hormonal control initiated by

environmental stimuli

crustanean x-organ

stops molting

crustanean y-organ

releases molting hormone

crustanean predators

larvae, worms, crustaceans, snails, fish

crustanean scavengers

detritius and dead organisms

crustanean suspension

plankton and bacteria

crustanean type of feeders

predators, scavengers, suspension

crayfish digestion

two part stomach with gastric mill to grind food

specialized digit for piercing/smashing prey

mantis shrimp

snapping claw creates a powerful shockwave

pistol shrimp

class remipedia species count

10

class remipedia habitat

marine caves

class remipedia ___ identical trunk segments

25-38

class remipedia appendages

paired biramous swimming

class remipedia maxillae and maxillipeds

prehensile/for feeding

class cephalocarida species count

9

class cephalocarida habitat

sediment

thoacic limbs all similar

class cephalocarida

class cephalocarida lack

eyes, carapace, abdominal appendages

class branchiopoda species count

10,000

class branchiopoda habitat

freshwater

order anostraca

fairy shrimp

order notostraca

tadpole shrimp

order diplostraca

water feals

class branchiopoda respiratory organ

flattened, leaflike phyllopodia

important for food webs

class branchiopoda

class maxillopoda species count

10,000

class maxillopoda ____ cephalic segments

five

class maxillopoda ____ thoracic segments

six

class maxillopoda ____ abdominal segments

four

class maxillopoda nauplii unique organ

maxillopodon eye

subclass mystacocarida habitat

sand, iterstitial spaces

plankton from spongebob

subclass copepoda

subclass copepoda lack

carapace

subclass copepoda retain ___ in adulthood

nauplius

subclass copepoda ___ pair of uniramous maxillipeds

one

subclass copepoda ___ biramous thoracic appendages

four

subclass copepoda parasite lifestyle

multiphasic

subclass tantulocarida sexual females

one pair of anntennae

subclass tantulocarida parasitic life stages

larvae pierce host by mouth tube > adults lose limbs/abdomen

subclass tantulocarida juvenile abdomonal segment count

6/7

subclass branchiura common name

fish ectoparasites

subclass branchiura maxillae

suction cup

subclass branchiura carapace

shield like

subclass branchiura ___ biramous legs

four

subclass branchiura abdomen

short, unsegmented

subclass branchiura development

direct

subclass pentastomida common name

tongue worms

subclass pentastomida species count

130

subclass pentastomida parasitic in what body part

lung

subclass pentastomida appearance

worm like, transverse rings

subclass pentastomida cuticle

porous, non-chitinous

subclass pentastomida digestive system

simple