Longnose dace (Rhinichthys cataractae)

General data

Main name: Longnose dace
Climates: Subtropical, Temperate, Continental
Habitat: Freshwater
Native: North America
Distribution: Missouri River, Columbia River, Rio Grande, Hudson River, Potomac, Susquehanna River, View all... Mackenzie, St. Johns River, Connecticut River

Classification

Description

The longnose dace (Rhinichthys cataractae) is a freshwater minnow native to North America. Rhinicthys means snout fish (reference to the long snout) and cataractae means of the cataract (first taken from Niagara Falls). Longnose dace are small, typically less than 10 cm and characterized by their fleshy snout that protrudes past the mouth. They are well adapted for living on the bottom of fast-flowing streams among stones. Longnose dace eat algae and aquatic insects and are important forage minnows for larger predatory fish. Longnose dace can be mistaken for suckers because of their subterminal sucker-like mouth. However, longnose dace (like all members of the family cyprinidae) lack small fleshy projections, called papillae, on their mouths. Juveniles have a black lateral line that extends from the beginning of the eye to the caudal fin that fades as the fish matures. The lateral line in juveniles is not present in all populations. In adults, the dorsal side is dark green to black, the lateral side is darkish to silvery with mottling often present, and the ventral side is pearly. Both adult males and females may have bright orange-reddish colouration at the base of pectoral, pelvic, and anal fins and on the upper lip. This colouration is typically associated with breeding males in the subspecies Rhinichthys cataractae cataractae, but the validity of this subspecies has yet to be confirmed. Museum specimens of females also show intense orange-reddish colouration at the base of the fins and upper lip, therefore colouration is not an accurate predictor of sex. The maximum length of longnose dace is 170 mm, but they are usually less than 100 mm. Longnose dace have the widest distribution of any cyprinid in North America, with a range reaching as far south as the Rocky Mountains in northern New Mexico and as far north as the Mackenzie River near the Arctic Circle and across the continent from the Pacific to Atlantic coast. Multiple refugia during the most recent glacial maximum may explain the broad geographic distribution of longnose dace. There were up to three possible glacial refuges during Pleistocene glaciations: the Pacific, the Mississippi and the Atlantic. Longnose dace on the Quebec peninsula likely originated only from the Atlantic refuge, in contrast to other fish species on the peninsula that originated from multiple refugia. Longnose dace in northwestern North America originated from a Pacific refuge.

Taxonomy of Fishes

Osteichthyes - Bony fishes->
- Coelacanthi - Lobe-finned fishes->
- Teleostei - Ray-finned fishes->
  - Perciformes - Perches->
  - Cypriniformes - Carps->
    
    Cyprinidae - Carps->
    
    Gobionidae - Gudgeons->
    
    Tincidae - Tench->
    
    Cobitidae - True loaches->
    
    Acheilognathidae - Bitterling-like cyprinids->
    
    Leuciscidae - Chub family->
    
    Squalius - Chubs->
    
    Abramis - Breams->
    
    Ballerus - Blue Breams->
    
    Blicca - Silver Breams->
    
    Vimba - Vimbas->
    
    Chondrostoma - Nases->
    
    Alburnoides - Riffle minnows->
    
    Alburnus - Bleaks->
    
    Phoxinus - Eurasian minnows->
    
    Leucaspius - Moderlieschens->
    
    Leuciscus - Eurasian daces->
    
    Telestes - Souffies->
    
    Pelecus - Sabrefishes->
    
    Rutilus - Roaches->
    
    Scardinius - Rudds->
    
    Pachychilon - Macedonian Roaches->
    
    Pelasgus - Greek minnow->
    
    Achondrostoma - Achondrostoma->
    
    Ptychocheilus - Pikeminnows->
    
    Pseudaspius - Amur asp->
    
    Pseudochondrostoma - Pseudo nase->
    
    Gila - Gila chub->
    
    Luxilus - Luxilus->
    
    Semotilus - Creek chubs->
    
    Notemigonus - Golden shiners->
    
    Siphateles - Siphateles->
    
    Richardsonius - Redside shiners->
    
    Orthodon - Orthodon->
    
    Campostoma - Stonerollers->
    
    Nocomis - North American chubs->
    
    Leucos - Adriatic roaches->
    
    Sarmarutilus - Sarmarutilus->
    
    Delminichthys - Karst minnows->
    
    Phoxinellus - Adriatic naked minnows->
    
    Parachondrostoma - South-west European nase->
    
    Iberochondrostoma - Iberian nase->
    
    Petroleuciscus - Ponto-Caspian chubs->
    
    Pimephales - Bluntnose minnows->
    
    Rhinichthys - Riffle daces->
    
    Western blacknose dace (Rhinichthys obtusus)
    
    Longnose dace (Rhinichthys cataractae)
    
    Speckled dace (Rhinichthys osculus)
    
    Eastern blacknose dace (Rhinichthys atratulus)
    
    Loach minnow (Rhinichthys cobitis)
    
    Las Vegas Dace (Rhinichthys deaconi)
    
    Umpqua dace (Rhinichthys evermanni)
    
    Leopard dace (Rhinichthys falcatus)
    
    Umatilla dace (Rhinichthys umatilla)
    
    Cyprinella - Satinfin shiners->
    
    Macrhybopsis - Blacktail chubs->
    
    Platygobio - Platygobio->
    
    Chrosomus - Redbelly dace->
    
    Notropis - Eastern shiners->
    
    Erimystax - Slender chubs->
    
    Clinostomus - Redside daces->
    
    Couesius - Couesius->
    
    Mylocheilus - Mylocheilus->
    
    Acrocheilus - Acrocheilus->
    
    Acanthobrama - Acanthobrama->
    
    Agosia - Agosia->
    
    Algansea - Algansea->
    
    Anaecypris - Anaecypris->
    
    Aspiolucius - Aspiolucius->
    
    Aztecula - Aztecula->
    
    Capoetobrama - Capoetobrama->
    
    Hemitremia - Hemitremia->
    
    Codoma - Codoma->
    
    Dionda - Desert Minnows->
    
    Eremichthys - Eremichthys->
    
    Ericymba - Ericymba->
    
    Evarra - Evarra->
    
    Exoglossum - Exoglossum->
    
    Hesperoleucus - Hesperoleucus->
    
    Hybognathus - Hybognathus->
    
    Hybopsis - Hybopsis->
    
    Iberocypris - Iberocypris->
    
    Iotichthys - Iotichthys->
    
    Ladigesocypris - Ladigesocypris->
    
    Lavinia - Lavinia->
    
    Lepidomeda - Lepidomeda->
    
    Leucalburnus - Leucalburnus->
    
    Lythrurus - Lythrurus->
    
    Margariscus - Margariscus->
    
    Meda - Meda->
    
    Mirogrex - Mirogrex->
    
    Moapa - Moapa->
    
    Mylopharodon - Mylopharodon->
    
    Opsopoeodus - Opsopoeodus->
    
    Oregonichthys - Oregonichthys->
    
    Oreoleuciscus - Oreoleuciscus->
    
    Pararhinichthys - Pararhinichthys->
    
    Phenacobius - Phenacobius->
    
    Plagopterus - Plagopterus->
    
    Pogonichthys - Pogonichthys->
    
    Protochondrostoma - Protochondrostoma->
    
    Pseudophoxinus - Pseudophoxinus->
    
    Pteronotropis - Pteronotropis->
    
    Relictus - Relictus->
    
    Rhynchocypris - Rhynchocypris->
    
    Tampichthys - Tampichthys->
    
    Stypodon - Stypodon->
    
    Tropidophoxinellus - Tropidophoxinellus->
    
    Yuriria - Yuriria->
    
    Paranotropis - Paranotropis->
    
    Miniellus - Miniellus->
    
    Nemacheilidae - Stone loaches->
    
    Xenocyprididae - East Asian minnows->
    
    Catostomidae - Suckers->
    
    Leptobarbidae - Cigar barbs->
    
    Balitoridae - River loaches->
    
    Barbuccidae - Fire-eyed loaches->
    
    Botiidae - Pointface loaches->
    
    Danionidae - Danios->
    
    Ellopostomatidae - Square-head loaches->
    
    Gastromyzontidae - Hillstream loaches->
    
    Gyrinocheilidae - Algae eaters->
    
    Paedocyprididae - Tiny carps->
    
    Psilorhynchidae - Mountain carps->
    
    Serpenticobitidae - Snake loaches->
    
    Sundadanionidae - Tiny danios->
    
    Tanichthyidae - Mountain minnows->
    
    Vaillantellidae - Longfin loaches->
  - Esociformes - Pikes->
  - Salmoniformes - Salmons and Trouts->
  - Siluriformes - Catfishes->
  - Scorpaeniformes - Mail-cheeked fishes->
  - Gasterosteiformes - Sticklebacks->
  - Gadiformes - Cods->
  - Anguilliformes - Eels and morays->
  - Clupeiformes - Herrings->
  - Syngnathiformes - Pipefishes and Seahorses->
  - Gobiiformes - Gobies->
  - Mugiliformes - Mullets->
  - Carangiformes - Jacks->
  - Beloniformes - Needlefishes->
  - Labriformes - Wrasses->
  - Scombriformes - Mackerels->
  - Mulliformes - Goatfishes->
  - Pleuronectiformes - Flatfishes->
  - Aulopiformes - Grinners->
  - Blenniiformes - Blennies->
  - Cyprinodontiformes - Toothcarps->
  - Osmeriformes - Smelts->
  - Centrarchiformes - Basses and sunfishes->
  - Cichliformes - Cichlids->
  - Characiformes - Characins->
  - Osteoglossiformes - Bony tongues->
  - Elopiformes - Tarpons and tenpounders->
  - Anabantiformes - Gouramies and snakeheads->
  - Gymnotiformes - South American knifefish->
  - Istiophoriformes - Barracudas->
  - Albuliformes - Bonefishes->
  - Lepidogalaxiiformes - Salamanderfishes->
  - Lophiiformes - Anglerfishes->
  - Spariformes - Breams and porgies->
  - Trachiniformes - Weeverfishes->
  - Moroniformes - Temperate basses->
  - Acanthuriformes - Surgeonfishes->
  - Zeiformes - Dories->
  - Tetraodontiformes - Puffers and filefishes->
  - Holocentriformes - Squirrelfishes->
  - Dactylopteriformes - Flying gurnards->
  - Lampriformes - Lamprids->
  - Galaxiiformes - Southern smelts->
  - Batrachoidiformes - Toadfishes->
  - Hiodontiformes - Mooneyes->
  - Percopsiformes - Trout-perches->
  - Callionymiformes - Dragonets->
  - Atheriniformes - Silversides->
  - Notacanthiformes - Spiny eels->
  - Saccopharyngiformes - Swallowers and Gulpers->
  - Alepocephaliformes - Slickheads and tubeshoulders->
  - Gonorynchiformes - Milkfishes->
  - Argentiniformes - Marine smelts->
  - Stomiiformes - Lightfishes and dragonfishes->
  - Ateleopodiformes - Jellynose fishes->
  - Myctophiformes - Lanternfishes->
  - Stylephoriformes - Tube-eyes->
  - Polymixiiformes - Beardfishes->
  - Beryciformes - Sawbellies->
  - Trachichthyiformes - Rughies->
  - Ophidiiformes - Cusk-eels->
  - Kurtiformes - Nurseryfishes & Cardinalfishes->
  - Synbranchiformes - Swamp eels->
  - Gobiesociformes - Clingfishes->
  - Acropomatiformes - Oceanic basses->
- Cladistii - Bichirs->
- Dipneusti - Lungfishes->
- Chondrostei - Sturgeons->
- Holostei - Gars and Bowfins->
Chondrichthyes - Cartilaginous fishes->
Agnatha - Jawless fishes->