Orders - Practical

Question 1

Chimaeriformes

Answer 1

fused upper jaw, whip-like tails, two dorsal fins

Question 2

Carcharhiniformes

Answer 2

absent gill rakers, nictitating membrane, two dorsal fins

Question 3

Orectolobiformes

Answer 3

inferior mouth, nasal grooves with barbles (most), widely spaced eyes

Question 4

Rhinopristiformes

Answer 4

Fused pectoral fin(s) to head, wedge like rostrum, long flat body

Question 5

Rajiformes

Answer 5

Ventral gill openings, absent nictitating membrane, enlarged pectoral fin fused to head, diamond shaped

Question 6

Torpediniformes

Answer 6

depressed truncate disk, slender jaws, reduced rostrum

Question 7

Myliobatiformes

Answer 7

ventral gill openings, depressed disks, serrated stings, cobblestone tooth plates, two large cephalic lobes on head (some)

Question 8

Amiiformes

Answer 8

Caudal fin abbreviate heterocercal, long dorsal fin, cycloid-scaled cylindrical body, bony gular plate on underside of lower jaw

Question 9

Acipenseriformes

Answer 9

Caudal fin heterocercal, absent gulars, protrusible jaws

Question 10

Anguilliformes

Answer 10

Pelvic fins and skeleton absent, usually scaleless, gill rakers absent, unfused premaxilla, elongated body

Question 11

Lepisosteiformes

Answer 11

body and jaws elongate, needle-like teeth, heavy ganoid scales, heterocercal tail,

Question 12

Aulopiformes

Answer 12

streamlined body, 2nd and 3rd pharyngobranchials: 2nd is long, extends out; its epibranchial’s hook touches 3rd; 3rd lacks cartilage joint with 2nd epibranchial.

Question 13

Ophidiiformes

Answer 13

long dorsal and anal fin that merges with caudal fin, slender

Question 14

Clupeiformes

Answer 14

parasphenoid teeth absent, parietals separated by the supraoccipital, large eyes, silvery guanine scales

Question 15

Siluriformes

Answer 15

locking spines on the dorsal and pectoral fins, inferior sub-terminal mouth, barbles on head and nares, small eyes

Question 16

Esociformes

Answer 16

Maxilla toothless but in gape of mouth, no adipose fin, dorsal and anal fins located posteriorly, no breeding tubercules

Question 17

Stomiiformes

Answer 17

maxilla and premaxilla have teeth, mouth extends past eye, photophores present

Question 18

Lophiiformes

Answer 18

first dorsal ray of spinous is the illicium and esca, first vertebra fused to skull, physoclistous swim bladder

Question 19

Elopiformes

Answer 19

abdominal pelvic fin, slender streamlined body, deeply forked caudal fin, upper jaw extending past eye

Question 20

Mugiliformes

Answer 20

Spinous, pectoral fins set high on the body (subabdominal), long gill rakers, forked tail, two widely spaced dorsal fins, terminal mouth, eye in close proximity to nare

Question 21

Scorpaeniformes

Answer 21

parietal sensory canal and spine, pelvic fins (fan shaped) separated (with single spine and five soft rays), anal fin present, superior mouth, eyes in close proximity

Question 22

Beloniformes

Answer 22

elongated body, presence of a fixed nonprotrusible upper jaw, large eye,

Question 23

Cypriniformes

Answer 23

mouth (jaws and palate) always toothless, adipose fin absent, abdominal/ventral pelvic fins, partly forked caudal tail

Question 24

Syngnathiformes

Answer 24

elongated body (whip-like) encased in a series of bony rings, tube shaped snout, upper jaw not protractile, ribs absent

Question 25

Cyprinidontiformes

Answer 25

caudal fin symmetrical, lateral line canal and pores chiefly on head

Question 26

Atheriniformes

Answer 26

pelvic fins behind eye, narial openings paired, slightly forked tail