Ephemeroptera (Insecta) in Cuba Author L, Carlos Naranjo Centro Oriental de Ecosistemas y Biodiversidad (BIOECO) Museo de Historia Natural Tomás Romay Saco 601, Santiago de Cuba, Cuba Author Peters, Janice G. Entomology, College of Agriculture and Food Sciences 1740 S. MLK Blvd, Florida A & M University Tallahassee, FL 32307, USA Author del, Pedro López Centro Oriental de Ecosistemas y Museo de Historia Natural Saco 601, Santiago de Author Castillo Biodiversidad (BIOECO) Tomás Romay Cuba, Cuba text Insecta Mundi 2019 2019-12-03 2019 736 1 52 journal article 10.5281/zenodo.5170691 1942-1354 5170691 A4EC11F3-CEF9-4AC9-B221-5F8FD03EA391 A.27. Tricorythodes sierramaestrae Kluge and Naranjo, 1990 Figures 14 , 56 . Tricorythodes sierramaestrae Kluge and Naranjo 1990:570 (male and female imagos, nymph). Asioplax sierramaestrae ; Wiersema and McCafferty 2000:348 . Holotype . Male imago, Province Santiago de Cuba , La Alcarraza (Guamá), 7-II-1989 , N. Kluge. The two species in the sacculobranchis species group are recognized by a transverse row of setae positioned on the basal third of forefemora. The species T. sierramaestrae is easily recognized by pale operculate gill covers with only a narrow dark line proximally. Ecology. The nymphs are found crawling on or between rocks in areas of rapids with little current. They are most abundant in lower zones of streams, although some were found up to an altitude of 900 m . Nymphs were present in the months of February, March, April, June, October, and December which would indicate that adults may emerge at any time of the year. Geographic distribution. The species is found only on the southern slopes of the Sierra Maestra and Gran Piedra mountain ranges ( Kluge and Naranjo 1990 ) in the Eastern Region ( Fig. 14 ).