EEB 474 Exam 4 Catostomidae and Ictaluridae

Catostomidae

• Sucker family

• Members have sucker-like mouth

• Papillose (plump) or plicate (thin and “striped”) lips

• Internal pharyngeal arch long and only one row of teeth

Carpoides spp.

• Catostomidae

• Long dorsal fin base with leading dorsal rays long

• Silvery with no pigment in pelvic fins

• Asymmetrical suboperculum

• 7 anal fin rays

Ictiobus spp.

• Catostomidae

• Long dorsal fin base

• Dusky gray with densely pigmented pelvic fins

• Symmetrical suboperculum

• 8-11 anal fin rays

Cycleptus elongatus

• Catostomidae

• Long dorsal fin base

• More cylindrical body

• Lower lobe of caudal fin dark

• Body color dark blue-gray in life

Catostomus commersonii

• Catostomidae

• Papillose lips

• Crowded predorsal scales

Moxostoma spp.

• Catostomidae

• Head rounded between eyes

• Lips plicate or papillose

• Lateral line complete and well-developed

• Dorsal saddles absent in adults

Minytrema melanops

• Catostomidae

• Each lateral scale with dark spot in center, roughly forming 10 horizontal lines

• Dorsal fin with straight or concave margin with distal black blotch in young

• 7 anal fin rays

• Dorsal fin rays 11-13

• Elongate body

Hypentelium nigricans

• Catostomidae

• Distinctive four dorsal saddle pattern throughout life

• Eyes far back on head

• Head flat or concave between eyes

• Lateral line complete and well developed

• Lips fleshy, papillose

• Kiss him for luck

Erimyzon spp.

• Catostomidae

• Lack lateral line

• 8-12 dorsal fin rays

• 7 anal fin rays

Ictaluridae

• Catfish family

• Only family of native truly freshwater catfish in U.S.

• Dorsal and pectoral spines are venomous

• All have adipose fins

• Four pairs of barbels present

Ameiurus melas

• Ictaluridae

• Dark chin barbels

• Caudal fin truncate

• Dark interradial membranes contrast sharply with pale rays on caudal fin

• Caudal fin often with pale vertical bar at base

Ameiurus natalis

• Ictaluridae

• Pale chin barbels

• Caudal fin truncate

• Fins uniformly dusky with black margin on anal and caudal fins

• Lower side of body never marbled or mottled

Noturus

• Genus within Ictaluridae

• Adipose fin fused to base along its entire length

• Typically smaller (6” is big) and more dorsoventrally compressed

• Saddles or no saddles (depends on subgenus)

• Mottled or stippled, or not (depends on subgenus)

Pylodictis olivaris

• Ictaluridae

• Large, broad, flat head

• Mottled body

• Dorsal lobe of caudal fin often white (most often in juveniles)

Ictalurus furcatus

• Ictaluridae

• Caudal fin deeply forked

• Margin of anal fin straight

• No spots present on side

Ictalurus punctatus

• Ictaluridae

• Caudal fin deeply forked

• Margin of anal fin rounded

• Spots present on side