subphylum crustacea

Question 1

crustacea is not technically a monophyletic group unless:

Answer 1

hexapods/insects are included. often though we call it pancrustacea when hexapods are included

Question 2

crustacean exoskeletons:

Answer 2

made of CaCO3 with flexible membranes at joints which are the points of respiration.

Question 3

crustacean respiration occurs

Answer 3

at joints of legs or through sporacles

Question 4

biramous appendages:

Answer 4

2 appendages from one base. exopod is appendage farther from body and endopod is appendage closer to body

Question 5

unique development of crustacea is:

Answer 5

nauplius larva. though not all crustacea have it

Question 6

describe a nauplius larva:

Answer 6

single cyclops style large eye, 3 pairs of antennules, antennae, mandibles. no posterior appendages

Question 7

6 classes of crustacea we covered:

Answer 7

malacostraca, copepoda, remipedia, ostracoda, branchiopoda, thecostraca

Question 8

malacostraca 4 orders we discussed:

Answer 8

decapods, isopods, amphipods, stomatopods

Question 9

malacostraca typically have ___ tagma

Answer 9

3

Question 10

decapods include common animals:

Answer 10

crabs, shrimps, lobsters, crayfish

Question 11

decapods are a ____ under ______ (organization)

Answer 11

order; class malacostraca

Question 12

decapods have a unique development compared to other crustacea. this is:

Answer 12

nauplius –> zooea –> megalops

Question 13

decapod legs are called:

Answer 13

pleopods

Question 14

isopods are a little different looking than other malacostraca. what differs?

Answer 14

they are more homonomous, dorsoventrally flattened

Question 15

isopod development is different than most other crustacea. they:

Answer 15

have direct development, carry eggs and babies in a brood pouch.

Question 16

amphipoda development are a little different than other crustacea. they have:

Answer 16

direct development, similar to isopods, they carry offspring in brood pouch

Question 17

some common names for amphipoda are:

Answer 17

skeleton shrimp, whale lice

Question 18

stomatopoda are commonly called:

Answer 18

mantis shrimp

Question 19

stomatopoda are ______ feeders

Answer 19

raptorial predator

Question 20

why are they called mantis shrimp?

Answer 20

stomatopoda’s 2nd thoracic appendage is mantis-like claws

Question 21

2 groups of stomatopoda are:

Answer 21

spearers and smashers

Question 22

stomatopoda sensory system:

Answer 22

eyes are suppper complex, 20 color receptors with 3 pupils per eye. much better than humans.

Question 23

copepoda is a _____ under ______

Answer 23

class; subphylum crustacea

Question 24

copepods have 2 types of life way

Answer 24

parasitic & free-living

Question 25

why are copepods important in an ecosystem? (similar to caterpillars haha)

Answer 25

they link the tiny and the larger. copepods link microscopic and macroscopic life
also, they are 50% of the biomass of all marine plankton

Question 26

free-living copepods have ___ feet

Answer 26

paddle shaped feet called an oar foot

Question 27

ostracoda are commonly called

Answer 27

ostracods, seed shrimp

Question 28

ostracoda are _____ under: (organization)

Answer 28

class under subphylum crustacea

Question 29

what other group of animals do ostracods resemble?

Answer 29

bivalves. their carapace has expanded into a bivalved shell that is reinforced with CaCO3, except they are much smaller than bivalves

Question 30

ostracods are ___ feeders

Answer 30

suspension or detritivore

Question 31

how do ostracods differ from most other crustaccea?

Answer 31

very reduced head and segmentation, fewest appendages of any crustacean class

Question 32

branchiopods are commonly called:

Answer 32

brine shrimp, fairy shrimp, clam shrimp, daphnia, sea monkeys

Question 33

branchiopods are ____ feeders

Answer 33

suspension

Question 34

brine shrimp vs daphnia

Answer 34

brine shrimp have no carapace and swim on back. brine shrimp have a nauplius larva

daphnia have a bivalved carapace and are laterally compressed. daphnia have no larvae.

both are in the class branchiopoda under subphylum crustacea, but daphnia are diplostraca and brine shrimp are anostraca

Question 35

thecostraca are commonly called

Answer 35

barnacles

Question 36

thecostraca have _____ development

Answer 36

have 2 motile larval stages.

Question 37

thecostraca are phoretic:

Answer 37

they have a host, which they use for transport but are not technically parasitic because they don’t feed on the host

Question 38

the larval stages of thecostraca are:

Answer 38

nauplius
cyprid

Question 39

what is a cyprid

Answer 39

the second larval stage of a barnacle. walks around looking for a good spot to lay down. lives for only a day, non-feeding, glues forehead to the ground and builds its shell around itself

Question 40

what differentiates thecostraca nauplius from other nauplius?

Answer 40

it has lateral horns

Question 41

while most barnacles are phoretic, some are parasitic. how do they live?

Answer 41

they grow throughout the body of their host with a hyphae-like body. they enter their host by injecting their cells into them as a cyprid larvae

Question 42

a barnacles legs kick out, and they are essentially upside down their whole life. what is the function of the legs?

Answer 42

absorb oxygen through legs, feed with legs (suspension feeders)

Question 43

remipedia organization

Answer 43

class under subphylum crustacea

Question 44

remipedes resemble:

Answer 44

centipedes

Question 45

remipedes are the only crustacean that is definitively:

Answer 45

venemous. they have venom claws and glands on maxillules

Question 46

remipedes vs chilopodes

Answer 46

remipedes are in class remipedia from subphylum crustacea. chilopodes are a class under subphylum myriapoda. both are under phylum arthropoda.

remipedes have venom clands on maxillules while chilopodes have it on 1st trunk limb.
remipedes have biramous legs while chilopodes have uniramous legs.
remipedes have a nauplius larva while chilopodes do not.

Question 47

remipedes are important on the phylogenetic tree of PAN arthropoda because:

Answer 47

they are the closest relative to hexapods. may be sister group with copepods and copepod+remipedia are sister group to hexapods

Question 48

tantulocarida is:

Answer 48

a class under subphylum crustacea

Question 49

tantulocarida life way

Answer 49

all parasitic