Lab #1 Groups

Question 1

Hagfish

Answer 1

Myxiniformes
Pacific Hagfish

Question 2

Lamprey

Answer 2

Petromyzontiformes
Pacific Lamprey

Question 3

Cow Shark

Answer 3

Hexanchiformes
Bluntnose Sixgill Shark

Question 4

Mackeral Sharks

Answer 4

Lamniformes
Salmon Shark
Great White Shark
Basking Shark
Common Thresher Shark

Question 5

Requiem Sharks

Answer 5

Carcharhiniformes
Grey Reef Shark

Question 6

Dogfish Sharks

Answer 6

Squaliformes
Spiny Dogfish

Question 7

Skates

Answer 7

Rajiformes
Big Skate
Longnose Skate

Question 8

Electric Rays

Answer 8

Torpediniformes
Pacific Electric Ray

Question 9

Mantas

Answer 9

Myliobatiformes
Reef Manta

Question 10

Chimaeras

Answer 10

Chimaeriformes
Spotted Ratfish

Question 11

Myxiniformes Traits

Answer 11

Sensory barbels
single nostril opens into the mouth
Rudimentary eye
one semicircular canal
no paired fins, no dorsal or anal fin
Mucous pores
no larvae
scaleless and jawless
pre anal fin
no lateral line

Question 12

Petromyzintiformes Traits

Answer 12

Filter feeding larvae (ammocoetes)
Prominent eyes
7 gill pores
Sucking disk
No paired fins
Dorsal fin present
jawless
2 semicircular canals
nostril not into pharynx

Question 13

Hexanchiformes Traits

Answer 13

Six gills slits
no spots
single dorsal fin
as large as 5m
Bluntnose Sixgill shark

Question 14

Lamniformes Traits (Salmon shark)

Answer 14

Dark blotching on the ventral surface
small 2nd dorsal and anal fins
Secondary keel is below main keel

Question 15

Lamniformes Traits (White Shark)

Answer 15

Heavy set, triangular serrated teeth
Blunt conical snout
well-developed dorsal fin
strong keel (no 2nd keel)
ventral body is white

Question 16

Lamniformes Traits (Basking Shark)

Answer 16

large mouth, gill rakers
long gill slits
strong keel
second largest

Question 17

Lamniformes Traits (Common Thresher shark)

Answer 17

long upper tail lobe (equal to body length)
dorsal fin well in front of the pelvic fin
Small second dorsal and anal fins difficult
Conical snout

Question 18

Carchariniformes Traits (Grey Reef Shark)

Answer 18

long rounded snout
dorsal fin over or just in front pectoral fins
large second dorsal fin with short rear tip
black band on posterior of caudal fin
grey above white below

Question 19

Sqauliformes Traits (Spiny Dogfish)

Answer 19

Spine in front of each dorsal fin
no anal fins no keels
five gill slits
luminescent dots

Question 20

Rajiformes Traits (Big Skate)

Answer 20

Diamond shape, stiff snout
small eyes
prominent ring spot on pectoral fins
pectoral fins are concave
row of spines extends from tail to body

Question 21

Rajiformes Traits (Longnose Skate)

Answer 21

The anterior margin is strongly concave
Stiff and long snout
small eyes
plain eye spot on pectoral fins
notched pelvic fins into two lobes
row of spines mostly on tail

Question 22

Torpediniformes Traits (Electric Rays)

Answer 22

dark gray body coloration, distinct spots
pectoral fins rounded
thick tail with 2 dorsal fins of unequal size
caudal fin is well developed

Question 23

Myliobatiformes Traits (Reef Manta)

Answer 23

Dark brown, grayish blue
large triangular pectoral fins and projecting cephalic fins
Pectoral fins rounded, mouth is terminal
eyes are lateral, gills ventral, no tail spines