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For complete description and genitalia illustrations, see Spangler and Santiago-Fragoso 1987.
ECUADOR: Napo Province: “ECUADOR. Napo; San Francisco; de Borja; 15 May 1975; at blacklight” “Collected by; Spangler, Gurney; Langley, & Cohen” (2 paratypes USNM). VENEZUELA: Táchira State: “Delicas; Venezuela – Tachi-; ra. 1500m; 27-IX-1966” “C.J. Rosales; J. Salcedo” (1 specimen MIZA). “VENEZUELA Táchira; La Pesa San Vincente de; La Revancha 2950m; 7–16-V-2002; J. DeMarmels, A. Chacon” (2 specimens MIZA). “VENEZUELA Táchira; La Provencia La; Revancha 1340m; 7–16-V-2002; J. DeMarmels, A. Chacon” (4 specimens MIZA).
Disersus inca can be distinguished from all other Disersus by the combination of the entirely pubescent metatibia, except for a narrow glabrous patch apically (Fig. 22) and the rounded elytral apices of the male.
Members of this species vary slightly in size and color, from a reddish-brown to medium brown, and in total length from 6.6–7.6 mm. The female differs from the male in having slightly produced elytral apices and a rounded apical abdominal ventrite (see Spangler and Santiago-Fragoso 1987).
Habitat and distribution
Previously, Disersus inca was only collected in blacklight traps near montane streams in Ecuador, Colombia, and Peru (Spangler and Santiago-Fragoso 1987), this species is known to occur in the Cordillera Oriental in southwestern Venezuela from streams above 1000m in elevation (Fig. 1).
No other laraine species were collected with Disersus inca.
- Maier, C; 2013: A revision of the Larainae (Coleoptera, Elmidae) of Venezuela, with description of nine new species ZooKeys, 329: 33-91. doi
- Spangler P, Santiago-Fragoso S (1987) A revision of the Neotropical aquatic beetle genera Disersus, Pseudodisersus and Potamophilops (Coleoptera: Elmidae). Smithsonian Contributions to Zoology no. 446, 40 pp.