Laimosemion staecki (Schindler & Valdesalici, 2011)

Family:  Rivulidae (Rivulines), subfamily: Rivulinae
Max. size:  2.89 cm SL (male/unsexed)
Environment:  benthopelagic; freshwater; pH range: 4.4
Distribution:  South America: known only from the type locality, a pond in Rio Negro basin, Amazonas, Venezuela.
Diagnosis:  Dorsal soft rays (total): 8-9; Anal soft rays: 13-14; Vertebrae: 31-31. Belongs to the subgenus Owiyeye and differs from other congeners, except Rivulus altivelis, Rivulus nicoi, Rivulus tecminae and Rivulus uakti, by possessing long pelvic fins (pelvic-fin length up to about 25 % of SL, reaching the middle of anal-fin base in males vs. short pelvic fin, reaching anterior portion of anal-fi n base). Can be separated from other species of the subgenus (except for Rivulus amanapira, Rivulus rectocaudatus and Rivulus tecminae) by truncate caudal fin in males (vs. round, subtruncate, spatula- or lyre-shaped caudal fin). Its 35-38 scales in the longitudinal series separate this species from other species (vs. 41-44 in Rivulus altivelis, 48-49 in Rivulus amanapira and 38-43 in Rivulus rectocaudatus and Rivulus tecminae, 26-29 in Rivulus nicoi and 32-33 in Rivulus uakti) (Ref. 87326).
Biology:  Found in a pond with clear, light brownish color and very acidic water (Ref. 87326).
IUCN Red List Status: Data deficient (DD); Date assessed: 08 June 2017 Ref. (130435)
Threat to humans:  harmless


Source and more info: www.fishbase.org. For personal, classroom, and other internal use only. Not for publication.