 Summary of gelanoglanis | |||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Etymology | Gelanoglanis: Greek, gelanes, -es, -es = happy, smiling + Greek, glanis = a fish that can eat the bait without touching the hook; a cat fish. | ||||||||||||||||||||||||||||
| 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. | ||||||||||||||||||||||||||||
| Sexing | As in other members of the auchenipterid subfamily Centromochlinae, anal-fin forms an intromittent structure in adult males. | ||||||||||||||||||||||||||||
| Size | Smallest 22mm, largest 36mm, average 27mm, most commonly 22mm. All SL. | ||||||||||||||||||||||||||||
| Species | There are 5 "species" in the database | ||||||||||||||||||||||||||||
| New spp. / time |
| ||||||||||||||||||||||||||||
| Distribution | Login to view the map. | ||||||||||||||||||||||||||||
| Genus Thumbnails | |
|---|---|
| |
/siluriformes/auchenipteridae/gelanoglanis/varii/1.jpg "Gelanoglanis varii - Click for species page")