Congoglanis Alula
📖 Overview
Typically found in fastest flowing portions of rivers and always associated with large rocks; appears to congregate underneath rocks near where water breaks over the rocks during the day, and will move out onto the tops of rocks at night .
🔬 Taxonomy
🐟 Physical Description
Dorsal spines (total): 0; Dorsal soft rays (total): 8; Anal spines: 0; Anal soft rays: 9 - 11. Diagnosis: Congoglanis alula differs from C. inga in having a shorter maxillary barbel not reaching to vertical through anterior margin of orbit, vs. extending well past anterior margin of orbit, respectively; a longer pelvic fin, 24–28% of standard length, vs. 19–21%; a shorter postorbital length, 27–31% of head length, vs. 32–35%; a relatively narrow interorbital width, 1.5 times eye diameter, vs. 2 times; and shorter anal-fin rays, posterior rays of adpressed anal fin extend to, rarely slightly beyond, vertical through posterior limit of adipose fin, vs. posterior rays extend well past vertical through posterior limit of adipose fin . Congoglanis alula differs from C. sagitta in having a longer pectoral fin, 28–29% of standard length, vs. 23–27%; a longer pelvic fin, 24–28% of standard length, vs. 19–21%; a shorter caudal peduncle, 18–22% of standard length, vs. 21–24%; and deeper caudal peduncle, caudal-peduncle depth 2.6–3.3 times in caudal-peduncle length, vs. 3.1–4.0 times; a relatively narrow interorbital width, 1.5 times eye diameter, vs. 2 times; a more posteriorly placed anal fin, anal-fin origin approximately at tip of adpressed pelvic fin, vs. origin well in advance of tip of adpressed pelvic fin; and fewer vertebrae, 36–39, vs. 39–41 . : elongated.
🌀 Behaviour
Behavioural data for Congoglanis Alula is currently being reviewed.
🦐 Diet
Diet information for Congoglanis Alula is currently being compiled.
🥚 Reproduction
Reproduction data for Congoglanis Alula is currently being compiled.
🌍 Habitat & Distribution
Freshwater; demersal. Tropical; 3°N - 10°S, 14°E - 30°E
🌿 Ecology
📐 Morphometrics
🌡️ Water Parameters & Tolerance
🛡️ Conservation Assessment
📊 Population Risk & Fisheries
🌐 Names & Taxonomy
Scientific Synonyms
| Scientific Name | Author | Year | Status |
|---|---|---|---|
| Doumea alula | Nichols & Griscom | 1917 | Synonym |
🔍 Similar Species
🗺️ Global Occurrence Map
Occurrence records from the Global Biodiversity Information Facility (GBIF) - 44 records indexed .
👥 Community & Contribute
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