Vocabulary Terms Exam 2

Question 1

Carapace

Answer 1

a bony or chitinous case or shield covering the cephalothorax

Question 2

Cephalothorax

Answer 2

the fused head and thorax of spiders and other chelicerate arthropods.

Question 3

Coronate Larva

Answer 3

the free living developmental stage of Bryozoans that emerge from ovicells. They are nonfeeding and ciliated

Question 4

Decapodid Stage

Answer 4

Larvae of decopods that swim with their pleopods

Question 5

Dentrobranchiate Gills

Answer 5

branched gills

Question 6

Endopod

Answer 6

inner medial branch of two branched crustacean leg or appendage

Question 7

Epipod

Answer 7

lateral extension from the base of an appendage

Question 8

Exopod

Answer 8

Outer lateral branch of two branched crustacean

Question 9

Hexapoda

Answer 9

the largest grouping of arthropods that includes insects

Question 10

Manca

Answer 10

post larval juvenile of some isopods

Question 11

Marsupium

Answer 11

broad pouch specialized for carrying, protecting, and nourishing newborn young

Question 12

Maxilliped

Answer 12

an appendage modified for feeding

Question 13

Megalops

Answer 13

larval stage following zoea in crab development, first stage after egg

Question 14

Nauplius

Answer 14

a larval form with three pairs of appendages and a singe median eye

Question 15

Pereopod

Answer 15

an appendage of the pereon - 7 articles coxa, basis, and endopodal articles ischium to dactyls

Question 16

Phylobranchiate

Answer 16

A type of decapod gill bearing a double series of platelike or leaflike branches from the axis

Question 17

Pilidium larva

Answer 17

in nemertini, a free swimming larva which develops directly from the gastrula

Question 18

Subchelate

Answer 18

an appendage in which the dactylus is shorter and less robust than the peropodus

Question 19

Tadpole larva

Answer 19

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Question 20

Tornaria larva

Answer 20

planktonic larva of some hemichordates

Question 21

Trilobite larva or stage

Answer 21

3 lobed larva that is a developmental form of limulus and resembles a trilobite

Question 22

Uropod

Answer 22

posterior appendage found in a variety of crustaceans (normally locomotive)

Question 23

zoea

Answer 23

any of the free swimming larva of certain crustaceans (crabs) having rudimentary legs and a spiny carapace

Question 24

homoplasy

Answer 24

correspondence between parts or organs acquired as a result of parallel evolution of convergence

Question 25

monophyletic

Answer 25

a group composed of a collection of organisms, including the most recent common ancestor of all those organisms and all the descendants of that most recent common ancestor

Question 26

polyphyletic

Answer 26

a group composed of a collection of organisms in which the most recent common ancestor of all the organisms is not included usually because the common ancestor lacks the characteristics of the group.