Liosomadoras oncinus • Auchenipteridae • Cat-eLog

Cat-eLog Data Sheet
Scientific Name	**Liosomadoras oncinus** (Jardine & Schomburgk in Schomburgk, 1841)
Common Name(s)	Jaguar Catfish
Type Locality	Padauiri River
Synonym(s)	Arius oncinus
Pronunciation	lie oh SEW ma DOOR uss - ONN sin uuss
Etymology	From the Greek leios, meaning smooth, soma, meaning body and Doras (a genus of doradid catfishes); in reference to the lack of bony plates on the body (when the genus was described as a doradid). Oncinus from the Latin name of this species namesake, the Jaguar (Panthera onca)
Species Information
Size	250mm (9.8") SL. Find near, nearer or same sized spp.
Identification	A beautiful, Jaguar-style, patterned fish that is unmistakable. This species is widely distributed but doesn't appear to show any great difference in appearance between species from different origins.
Sexing	Sexually mature males have a genital papilla which is a modification of the anal fin, they also have thicker and more robust dorsal and pectoral fin spines. Harder to sex younger individuals.
General Remarks	A species that becomes active at late dusk and remains so until first light. Spends all of the daytime crammed into a dark spot in the aquarium, or, in nature, driftwood crevices and holes. Liosomadoras is the only genus in Auchenipteridae with a postcleithral process, which is the reason this genus was previously placed in Doradidae.
Habitat Information
Distribution	South America: Ucayali, Amazonas and Negro river basins. Amazon, Middle Amazon (Solimoes), Negro (click on these areas to find other species found there) Amazon (click on these areas to find other species found there) Amazon, Upper Amazon, Marañón, Ucayali (click on these areas to find other species found there) (Click the map-icon to show/hide map of species distribution)
pH	5.6 - 7.2
Temperature	20.0-28.0°C or 68-82.4°F (Show others within this range)
Other Parameters	Care is required with this species upon import as it is not often clear what water parameters (in the wild) it is used to. It's a reasonably hardy fish, so best to acclimatize in pH of around 6.4-6.6 if the origin is unknown.
Husbandry Information
Feeding	Accepts a wide variety of foods. Larger frozen foods are preferred. Should be fed when the tank is dark or dimly lit.
Furniture	Provide many hiding spots as this fish is very shy and nocturnal if kept in well lit aquaria. Lots of wood, floating plants and dim lighting will allow the fish to feel more comfortable.
Compatibility	In general a peaceful fish. It will however fiercely defend its hiding spot against intruders.
Suggested Tankmates	Other peaceful fish that are too large to swallow. Enjoys the company of its own species.
Breeding	Unreported
Further Information
References	Fish British Guiana I - pp173 - Pl. 4 Neotropical Ichthyology, 10(1): 1-11, 2012
Registered Keepers	(1) Kenneth Wong, (2) Dave Rinaldo, (3) lordotterby, (4) CatBrat, (5) synoguy, (6) mikelouth, (7) Occellatus, (8) soltarii007, (9) TP (k: 5), (10) ani-mal-lvr (k: 2), (11) Kattes (k: 4), (12) Osiris, (13) Birger (k: 4), (14) daniel60 (k: 7), (15) Koltsix (k: 3), who also notes: "Got three of these living peaceably with stingrays and some wood cats. Only one a large male defends his cave against all comers while head-butting the intruder and emitting a very audible grunt.", (16) ChileRelleno, (17) shawntraviss, (18) Tommi (k: 2), (19) smegforbrains, (20) GW_NL, (21) ali12345, (22) Schmike, (23) Martin S (p: 3, k: 4), who also notes: "Richard B's", (24) Kennye86, (25) allim, (26) The.Dark.One, (27) scotty105 (k: 2), (28) liam..essex, (29) Altifrons, (30) nvcichlids (k: 13), (31) Wiccatfish (k: 2), (32) raymgnz215, (33) Junttis (k: 4), (34) JamieH (k: 3), (35) danny.450, (36) Persephone, (37) PeterUK (k: 2), (38) chef, (39) markhinch (p: 2), (40) miles3, (41) Djthomas, (42) cory777, (43) Bijn, (44) Bisclavret, who also notes: "I LOVE this catfish! It loves me feeding it Krill as well. I named it "Houdini" because it will be one place one minute, and somewhere else the next", (45) arthos (p: 2, k: 4), (46) MilkMan, (47) MatsP, who also notes: "Dummy for testing...", (48) maynard1982 (k: 2), (49) arapaimag (k: 2), (50) redfan, (51) zigster (k: 2), (52) isterlingi, (53) limz_777, (54) jeepn4x4, (55) Decker504, (56) wrasse (k: 3), (57) knifegill, (58) miguel mitchel, (59) Marc van Arc, (60) CatfishPownage63 (p: 2), (61) Floody. Click on a username above to see all that persons registered catfish species. You can also view all "my cats" data for this species.
Breeding Reports	None.
Articles	- CotM 2008 October
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Last Update	2012 Mar 30 06:28 (species record created: 2001 Apr 13 00:00)

Cat-eLog Data Sheet

Scientific Name

Liosomadoras oncinus (Jardine & Schomburgk in Schomburgk, 1841)

Jaguar Catfish

Padauiri River

Arius oncinus

lie oh SEW ma DOOR uss - ONN sin uuss

Etymology

From the Greek leios, meaning smooth, soma, meaning body and Doras (a genus of doradid catfishes); in reference to the lack of bony plates on the body (when the genus was described as a doradid). Oncinus from the Latin name of this species namesake, the Jaguar (Panthera onca)

Species Information

Size

250mm (9.8") SL. Find near, nearer or same sized spp.

Identification

A beautiful, Jaguar-style, patterned fish that is unmistakable. This species is widely distributed but doesn't appear to show any great difference in appearance between species from different origins.

Sexing

Sexually mature males have a genital papilla which is a modification of the anal fin, they also have thicker and more robust dorsal and pectoral fin spines. Harder to sex younger individuals.

General Remarks

A species that becomes active at late dusk and remains so until first light. Spends all of the daytime crammed into a dark spot in the aquarium, or, in nature, driftwood crevices and holes. Liosomadoras is the only genus in Auchenipteridae with a postcleithral process, which is the reason this genus was previously placed in Doradidae.

Habitat Information

Distribution

South America: Ucayali, Amazonas and Negro river basins.
Amazon, Middle Amazon (Solimoes), Negro (click on these areas to find other species found there)
Amazon (click on these areas to find other species found there)
Amazon, Upper Amazon, Marañón, Ucayali (click on these areas to find other species found there)

(Click the map-icon to show/hide map of species distribution)

5.6 - 7.2

Temperature

20.0-28.0°C or 68-82.4°F (Show others within this range)

Other Parameters

Care is required with this species upon import as it is not often clear what water parameters (in the wild) it is used to. It's a reasonably hardy fish, so best to acclimatize in pH of around 6.4-6.6 if the origin is unknown.

Husbandry Information

Feeding

Accepts a wide variety of foods. Larger frozen foods are preferred. Should be fed when the tank is dark or dimly lit.

Furniture

Provide many hiding spots as this fish is very shy and nocturnal if kept in well lit aquaria. Lots of wood, floating plants and dim lighting will allow the fish to feel more comfortable.

Compatibility

In general a peaceful fish. It will however fiercely defend its hiding spot against intruders.

Suggested Tankmates

Other peaceful fish that are too large to swallow. Enjoys the company of its own species.

Breeding

Unreported

Further Information

References

Fish British Guiana I - pp173 - Pl. 4
Neotropical Ichthyology, 10(1): 1-11, 2012

Registered Keepers

(1) Kenneth Wong, (2) Dave Rinaldo, (3) lordotterby, (4) CatBrat, (5) synoguy, (6) mikelouth, (7) Occellatus, (8) soltarii007, (9) TP (k: 5), (10) ani-mal-lvr (k: 2), (11) Kattes (k: 4), (12) Osiris, (13) Birger (k: 4), (14) daniel60 (k: 7), (15) Koltsix (k: 3), who also notes: "Got three of these living peaceably with stingrays and some wood cats. Only one a large male defends his cave against all comers while head-butting the intruder and emitting a very audible grunt.", (16) ChileRelleno, (17) shawntraviss, (18) Tommi (k: 2), (19) smegforbrains, (20) GW_NL, (21) ali12345, (22) Schmike, (23) Martin S (p: 3, k: 4), who also notes: "Richard B's", (24) Kennye86, (25) allim, (26) The.Dark.One, (27) scotty105 (k: 2), (28) liam..essex, (29) Altifrons, (30) nvcichlids (k: 13), (31) Wiccatfish (k: 2), (32) raymgnz215, (33) Junttis (k: 4), (34) JamieH (k: 3), (35) danny.450, (36) Persephone, (37) PeterUK (k: 2), (38) chef, (39) markhinch (p: 2), (40) miles3, (41) Djthomas, (42) cory777, (43) Bijn, (44) Bisclavret, who also notes: "I LOVE this catfish! It loves me feeding it Krill as well. I named it "Houdini" because it will be one place one minute, and somewhere else the next", (45) arthos (p: 2, k: 4), (46) MilkMan, (47) MatsP, who also notes: "Dummy for testing...", (48) maynard1982 (k: 2), (49) arapaimag (k: 2), (50) redfan, (51) zigster (k: 2), (52) isterlingi, (53) limz_777, (54) jeepn4x4, (55) Decker504, (56) wrasse (k: 3), (57) knifegill, (58) miguel mitchel, (59) Marc van Arc, (60) CatfishPownage63 (p: 2), (61) Floody.

Click on a username above to see all that persons registered catfish species. You can also view all "my cats" data for this species.

Breeding Reports

None.

Articles