All FishesAuchenipteridaeAuchenipterinaeSpinipterus

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Scientific Name Spinipterus moijiri   
Common Names Otorongo Woodcat
Spinipterus Sp(1), Spinipterus Sp`oncinha`
Pronunciation spi NIP terr uss. - moy JEE ree.
Etymology The specific epithet moijiri comes from Moijiri; this species is known among the Paumari Indians that inhabit the Río Tapauá, Purus basin. The meaning of the word Moijiri is unknown so far. The Paumari language belongs to the Arawa linguistic group.
Hop to next section Species Information
Size 105mm or 4.1" SL. Find near, nearer or same sized spp.
Identification Some of the unique features which distinguish Spinipterus from other auchenipterids are: pectoral and dorsal-fin spines with four prominent rows of serrations; lateral margin of the skull roofing bones ornamented with a single row of spines; and adducted dorsal fin rests into a mid-dorsal groove. Spinipterus also differs from most other auchenipterid genera by having lower counts for some fin rays.

Spinipterus moijiri differs from S. acsi by having a jaguar-like colour pattern of large black rosette-like spots over a light yellow to brown background (vs. brown background with small dark blotches over the body); adult body size reaching 104.5 mm SL (vs. maximum known size of body 37.1 mm SL); posterior process of cleithrum short, not reaching the vertical through the dorsal fin spine (vs. process long, almost reaching the vertical through first dorsal fin ray); seven soft pectoral-fin rays (vs. six soft pectoral-fin rays); caudal fin truncated (vs. caudal fin rounded).
Sexing Males have an elongate intromitent organ extending attached along the entire length of the anterior anal-fin margin. Females have a small urogenital opening anterior to anal fin. Other secondary sexually-dimorphic characters found among Auchenipteridae (on the fins, barbels and epidermis) were not observed in Spinipterus moijiri.
General Remarks The colour varies with age: small specimens have simple large black spots that gradually start to become rosette-like with growth. In specimens over 90mm, the rosettes are all over the body and some start to fragment into small black spots that are present over the body, head and all fins, but more conspicuous on the caudal and dorsal fins. Ventral surface of head densely pigmented with small spots on the branchiostegal membrane and around mental barbells. Ventral surface of body, from pectoral girdle to urogenital opening light brownish or yellowish, lacks spots.
Hop to next section Habitat Information
Distribution Río Tapauá (Río Purus basin) and from Igarapé Ubim, a small tributary of Lago Amanã, Río Japurá, both from Brazil. Also reported in Peru, from Depto. Loreto, Province Maynas, Río Nanay throughout Tarapoto village and confluence with Caño Tarapoto (S. Grant pers. comm.).
Amazon, Middle Amazon (Solimoes), Purus, Tapauá (click on these areas to find other species found there)
Amazon, Middle Amazon (Solimoes), Japurá, Amanã (click on these areas to find other species found there)
Amazon, Upper Amazon, Nanay (click on these areas to find other species found there)

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Hop to next section Husbandry Information
Furniture This species is most comfortable hiding in wood tangles.
Suggested Tankmates In the wild, this species was collected was collected inside submerged trunks together with the auchenipterids Liosomadoras morrowi and Tatia sp., and Pseudacanthicus sp. and Panaqolus sp..
Breeding This species has been spawned in captivity.
Breeding Reports There is no breeding report.
Hop to next section Further Information
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Last Update 2019 Nov 27 23:31 (species record created: 2002 Oct 05 00:00)