Cat-eLog Right Arrow Loricariidae Right Arrow Hypostominae Right Arrow Hypancistrus

Jump to next section Cat-eLog Data Sheet
Scientific Name Hypancistrus contradens  Armbruster, Lujan & Taphorn, 2007
Common Name Orinoco Polka-dot Pleco
Type Locality Río Ventuari, 23 kilometers northeast of Macuruco, 94 kilometers east of San Fernando de Atabapo, 4°04'50''N, 66°51'31''W, Amazonus, Venezuela
Pronunciation hype an siss truss - kon tra dens
Etymology A contraction of the Greek hypo (meaning less than) and ancistrus, an allusion to the reduced number of teeth (particularly in the lower jaw) found in this genus. From the Latin contra for opposite, or of difference, and dens for tooth, in reference to the differently shaped teeth in the dentary and premaxilla.
Jump to next section Species Information
Size 126mm or 5" SL. Find near, nearer or same sized spp.
Identification Often confused because of the picture in Aqualog and originally thought to be Hypancistrus inspector - Hypancistrus contradens lacks the black edging seen in the unpaired fins of Hypancistrus inspector.

Most easily confused with L201 which is flatter, more finely spotted and is more slender and less high bodied than Hypancistrus contradens which also grows about 2cm longer.
Sexing Mature males develop teeth like odontodes on their leading pectoral fin rays. These are more noticeable seasonally - presumably they are enlarged during the reproductive season.
Jump to next section Habitat Information
Distribution Border area Brazil/Venezuela (Upper rios Orinoco and Negro).
Orinoco, Upper Orinoco, Ventuari (click on these areas to find other species found there)
Orinoco, Upper Orinoco (click on these areas to find other species found there)
Amazon, Middle Amazon (Solimoes), Negro, Upper Negro (click on these areas to find other species found there)

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pH 5.0 - 7.5
Temperature 25.0-29.0°C or 77-84.2°F (Show species within this range)
Jump to next section Husbandry Information
Feeding Unlike the popular opinion of many other loricariids, Hypancistrus are more carnivores than algae eaters. This is backed up by a small and lightly toothed mouth that indicates they are poor algae scrapers. Provide small and frequent supply of mainly meaty foods such as dry discus food, bloodworm and even brineshrimp with the infrequent offering of flake or algae tablets.
Furniture Sand, primarily rocks and optionally driftwood. Caves made out of slate plates, bamboo or PVC pipe.
Compatibility Suitable with most fish, as long as they are not too large or territorial about bottom-space.
Suggested Tankmates Small tetras and other similar small fish. Also Corydoras. Care has to be taken to ensure that they get enough food, as they can be a bit shy and slow to grab food when available.
Breeding Breeds in a cave in typical Hypancistrus manner. Cave around 2.5cm/1"-5cm/2" diameter/diagonal and around 15cm/6" deep. Male cares for the brood for approximately 14 days. The clutch is around 20-50 eggs, depending on the size and condition of the female.
Breeding Reports There are 12 breeding reports, read them all here.
Jump to next section Further Information
References Aqualog shows an out-of-water L270 (or possibly L129) either way it's not this fish.
Copeia 2007(1) 62-79
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There are 15 records of this fish being seen, view them all.
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Last Update 2018 Jul 12 18:40 (species record created: 2001 Aug 27 00:00)