Actinopteri (ray-finned fishes) > Cypriniformes
(Carps) > Catostomidae
(Suckers) > Catostominae
Etymology: Minytrema: Latin, minimus = reduced + Greek, trema = aperture; refered to its reduced lateral line (Ref. 45335); melanops: melanops, meaning black appearance (Ref. 10294) More on author: Rafinesque.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; demersal; depth range - m (Ref. ), usually - m (Ref. ). Subtropical; 0°C - ; 46°N - 29°N
North America: lower Great Lakes and Mississippi River basins from Pennsylvania to Minnesota in the USA and south to Gulf; Atlantic and Gulf Slope drainages from Cape Fear River in North Carolina to Colorado River in Texas, USA (absent from most of peninsular Florida).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 50.0 cm TL male/unsexed; (Ref. 5723); common length : 32.3 cm TL male/unsexed; (Ref. 12193); max. published weight: 1.2 kg (Ref. 4699); max. reported age: 6 years (Ref. 12193)
Inhabits long deep pools of small to medium rivers over clay, sand or gravel. Occasionally found in creeks, large rivers and impoundments (Ref. 5723). Feeds on organic detritus, copepods, cladocerans, midge larvae and diatoms (Ref. 10294).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Page, L.M. and B.M. Burr, 1991. A field guide to freshwater fishes of North America north of Mexico. Houghton Mifflin Company, Boston. 432 p. (Ref. 5723)
IUCN Red List Status (Ref. 124695)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01047 (0.00626 - 0.01752), b=3.00 (2.85 - 3.15), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245
Trophic level (Ref. 69278
): 3.4 ±0.47 se; based on food items.
Resilience (Ref. 120179
): Medium, minimum population doubling time 1.4 - 4.4 years (tmax=6).
Vulnerability (Ref. 59153
): High vulnerability (57 of 100) .