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|Cat-eLog Data Sheet|
|Scientific Name||Gelanoglanis pan Calegari, Reis & Vari, 2014|
|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.|
|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.|
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|Breeding Reports||There is no breeding report.|
|References||Neotropical Ichthyology v. 12 (no. 4), pp 701, Figs. 1-2, 4-5.|
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|Last Update||2016 Jan 09 04:52 (species record created: 2015 Dec 27 00:29)|