Cat-eLog Right Arrow Auchenipteridae Right Arrow Centromochlinae Right Arrow Gelanoglanis

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Scientific Name Gelanoglanis pan  Calegari, Reis & Vari, 2014
Common Name
Type Locality Mato Grosso State, Itaúba, rio Teles Pires, tributary to upper rio Tapajós basin, 10°58’30"S, 55°44’3"W, Brazil.
Etymology Gelanoglanis: Greek, gelanes, -es, -es = happy, smiling + Greek, glanis = a fish that can eat the bait without touching the hook; a cat fish. pan, named after the Greek God of fertility and male sexuality, due to the large gonopodium of the males.
Down arrow Species Information
Size 25mm or 1" SL. Find near, nearer or same sized spp.
Identification Diminutive auchenipterid catfishes, distinguished by the following unique combination of characters: Single pair of chin barbels (vs. two pairs); pectoral spine, if present, lacking serrations on anterior margin; posterior nare large and immediately anterior to small eye; oblique, sinuous mouth with free fleshy flange around angle of gape; dorsal, anal, and paired fins short based with few rays; third pectoral-fin radial absent. Other shared traits include: Premaxillary tooth patches laterally oriented and widely separated anteriorly at midline; frontals sutured along midline for entire length; anterior fontanelle absent; vomer absent; mesopterygoid reduced to small round bone; mandibular ramus of lateral-line canal free from dentary.

Key for the species of Gelanoglanis (Calegari, Reis & Vari, 2014; Calegari & Reis, 2017)
1a. Pelvic fin almost reaching to the urogenital opening................ 2
1b. Pelvic fin falling short of the urogenital opening by a distance longer than the anal-fin length................ G. varii
2a. Dorsal and pectoral fins with spine................ 3
2b. Dorsal and pectoral fins lacking spine................ G. nanonocticolus
3a. Adult males with short gonopodium terminating at anal-fin origin; premaxillary teeth occupying two-thirds of length of premaxilla; anterior fontanel absent................ 4
3b. Adult males with long gonopodium extending posteriorly to midlength of base of anal fin; premaxillary teeth restricted to anterior portion of bone, occupying one-half or less of length of premaxilla; anterior fontanel present................ G. pan
4a. Dorsal-fin spine with strong serrae along posterior margin................ G. stroudi
4b. Dorsal-fin spine simple, without serrae along posterior margin................ G. travieso.

G. pan is distinguished from all other congeners by the following combination of traits: Dorsal and pectoral fins with spine; Adult males with long gonopodium extending posteriorly to midlength of base of anal fin; Premaxillary teeth restricted to anterior portion of bone, occupying one-half or less of length of premaxilla; Anterior fontanel present.
Sexing Proximal radials of anal-fin of mature males fused into single compound bone. Gonopodium in mature males in form of elongate, fleshy tube that originates anterior to the anal-fin base and extends one-half length of anterior margin of anal fin.
Down arrow Habitat Information
Distribution
Amazon, Lower Amazon, Tapajós, Teles Pires (click on these areas to find other species found there)

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IUCN Red List Category Not Evaluated
Down arrow Husbandry Information
Breeding Reports There is no breeding report.
Down arrow Further Information
Reference Neotropical Ichthyology v. 12 (no. 4), pp 701, Figs. 1-2, 4-5.
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Last Update 2019 Oct 27 04:32 (species record created: 2015 Dec 27 00:29)