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

Jump to next section Cat-eLog Data Sheet
Scientific NameHypancistrus contradens  Armbruster, Lujan & Taphorn, 2007
Common NameOrinoco Polka-dot Pleco
Type LocalityRío Ventuari, 23 kilometers northeast of Macuruco, 94 kilometers east of San Fernando de Atabapo, 4°04'50''N, 66°51'31''W, Amazonus, Venezuela
Pronunciationhype an siss truss - kon tra dens
EtymologyA 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.
IdentificationOften 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.
SexingMature 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
DistributionBorder 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)
Show it on a map (Click the map-icon to show/hide map of species distribution)
pH5.0 - 7.5
Temperature25.0-29.0°C or 77-84.2°F (Show species within this range)
Jump to next section Husbandry Information
FeedingUnlike 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.
FurnitureSand, primarily rocks and optionally driftwood. Caves made out of slate plates, bamboo or PVC pipe.
CompatibilitySuitable with most fish, as long as they are not too large or territorial about bottom-space.
Suggested TankmatesSmall 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.
BreedingBreeds 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.
Jump to next section Further Information
ReferencesAqualog shows an out-of-water L270 (or possibly L129) either way it's not this fish.
Copeia 2007(1) 62-79
Registered Keepers(1) snowball (k: 3), (2) Ak Viking, (3) mikey, (4) Cory-Diddi, (5) plecoboy (k: 5), who also notes: "They are together breeding in a 29 gallon breeder.", (6) gimmeplec5 (k: 2), (7) plecoready, (8) Zebra46 (k: 8), (9) ThorG, (10) ivokilli, (11) amergim, (12) alga (k: 24), (13) fishfarmer (k: 50), who also notes: "Breeding report on my web site", (14) Kingkat, (15) Tuti, (16) apistomaster (k: 6), who also notes: "Obtained very small specimens. Very shy species although also attractive.", (17) Bristle nose, (18) HylaChristine, (19) AmLi (k: 5), (20) Brotox (p: 4), (21) Plank (k: 3), (22) Poshpleco, (23) Vierrollenfreak (k: 14), (24) henryrus, (25) Selveste_Preben, (26) kerryteatsjr (k: 7), (27) Freakdaddy (k: 11), (28) chillired, (29) L127 (k: 3), (30) goodmike (k: 3), (31) drgold (k: 15), (32) Qaddiction, (33) Matien (k: 12), (34) CoryLoachFreak, (35) Yann (k: 2), (36) loloveto, (37) Scubaguy, who also notes: "Wild caught. L201", (38) Kenneth Wong, (39) briggadane (k: 4), (40) Plecofanatic1989, (41) pureplecs, (42) calsonic, (43) Numbers (k: 12), who also notes: "3 diff blood lines Dave- Sandy001 3-4cm$100 Arrows 2cm $85", (44) worldwide73, (45) Chillired89, (46) Nagy, (47) nvcichlids (k: 4), (48) Lubbe, (49) Tasplec, (50) miq (p: 2), (51) zhallam, (52) Complecs, (53) Joeytoe, (54) krzys (k: 2), (55) turtleboy07, (56) d_frag, (57) bert, (58) Xplode (k: 3), (59) Aquariumfun (k: 19), (60) flavus (k: 3), (61) Holey_Rock_of_Texas (k: 2), (62) BrendanK, (63) oxdeleon, (64) dconnors (k: 18), (65) OlePaulsen (k: 2), (66) amt4470, (67) tinycichlid1 (k: 4), who also notes: "still too small to tell", (68) Blackhawker, (69) TwoTankAmin (k: 30), who also notes: "Several spawns. 1st eaten by corys. 2nd growing out. ", (70) drpleco (k: 15), (71) Coco (k: 2), (72) Rita A (k: 4), (73) pleco_breeder (k: 4), (74) somename, (75) PlecoCrazy (p: 2, k: 21), (76) Torb (k: 5), (77) cjhoogma, (78) Mapple, (79) Donald (k: 8), (80) Raina, (81) AleGer (k: 12), (82) hankinswood, (83) xander, (84) lorax84, (85) avga, (86) janne dahle (k: 7), (87) FrogSplash, (88) Lihn (k: 5), (89) cdc069 (p: 2), (90) tagamasid1023, who also notes: "Hypancistrus Contradens is one of my favorites! I got my first hypancistrus contradens last July after a very long search in the Chicagoland. This hypan adapted really well in my Oscar tank and grew very rapidly! It started out around 50mm in July then grew to about 90mm by October. Unfortunately, this male hypan died for unknown reasons. My new one (pictured) is from the same LFS and about 50mm but has paler yellow spots compared to my first one. Perhaps this one is a she because of its dull colouration. They labeled it as L 136b, but I think they erred. My ultimate goal is to breed this hypan. But first, I need to maintain this one and determine its sex soon so that I can find a mate for it. Any advice guys?", (91) FFTRIP, (92) fahaka, (93) Sanplec (k: 6), (94) shooter50014 (k: 5), (95) seliel (k: 23), (96) yogi88, (97) Plaegis (k: 4), (98) Kai Hansen, (99) wet-handed (k: 4), (100) çaykaralı, (101) Cristoffer Forssander, (102) sem87, (103) msjinkzd (k: 12), (104) linuxrulesusa (k: 2), (105) baspen, (106) tangman, (107) kwalker (k: 10), (108) m1ke715m, (109) jorgehdzy, (110) CodOnMyRod, (111) PlecosAndLoaches, (112) Narwhal72, (113) victoriaz24 (k: 32), who also notes: "Very nice coloured fish, with very dark black scales with bright white spots. The fish like to hide in caves & will challenge any other species for a cave they like.", (114) Tamcon83 (p: 2, k: 6), (115) plecokim (k: 2), (116) LostYeti (k: 2), (117) Asset, (118) Peacefish, (119) spip, (120) Coldhands (p: 2, k: 2), (121) PurecoYSS (k: 5), (122) jkeeler, (123) DHarris, (124) Truls warhuus, (125) VickyEll7, (126) CoryCatfish1212 (k: 2), (127) Jborley, (128) Jesnil72 (k: 6), (129) john h (k: 10), (130) Koen (k: 28), (131) ruda_saga, (132) Camo182 (k: 6), (133) jonathancuotto, (134) FabianGimdal (k: 4), (135) JDenman (k: 6), (136) PhilsFish, (137) josteinP (k: 10), (138) Sappie (k: 7), (139) Milan.

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Breeding Reports(1) AleGer (b: 53), (2) Yann (b: 48), (3) Cristoffer Forssander (b: 48), (4) CodOnMyRod (b: 48), (5) seliel (b: 29), (6) plecoboy (b: 29), (7) Elwood (b: 23), (8) Jesnil72 (b: 23), (9) Narwhal72 (b: 13), (10) djtonyel (b: 12), (11) victoriaz24 (b: 12).
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Last Update2018 Jul 12 18:40 (species record created: 2001 Aug 27 00:00)