Dohrnemesa albuquerquei Wygodzinsky, 1966

Gil-Santana, Hélcio R. & Ferreira, Rodrigo Lopes, 2016, A new species of Dohrnemesa from Brazil, with notes on the male of D. carvalhoi and on D. albuquerquei (Hemiptera: Heteroptera: Reduviidae: Emesinae), Zootaxa 4173 (6), pp. 583-595 : 585

Dohrnemesa albuquerquei Wygodzinsky, 1966

( Figs. 1–2 )

Dohrnemesa albuquerquei Wygodzinsky, 1966: 231 (key), 232–233, 235 (description); Maldonado 1990: 83 (catalog).

Dohrnemesa albuquerquei was described based on a single male ( Fig. 1 ) collected in Petrópolis, a city located in a mountainous region of the state of Rio de Janeiro, Brazil. Some details about an additional male ( Fig. 2 ) found dead on a spider’s web on a wall of a house in Nova Friburgo, another city in the mountains of the state of Rio de Janeiro, are furnished below.

Remarks. Male (specimen from Nova Friburgo). Selected measurements (mm): total length to tip of abdomen 12.3; to tip of forewings 13.3; head length 1.2; pronotum: length of fore lobe 2.2; length of hind lobe 1.5; length of forewing 8.8. Fore tibiae somewhat curved, without dorsal depression, with a few longer, straight, obliquely inclined, pale setae on distal half dorsally, and a cluster of stiff, somewhat curved, golden setae on apical extremity ventrally.

The specimen examined is very similar to the holotype. The pair of elongated markings on the hind lobe of the pronotum is lighter-colored than in the holotype.

Comments. It would seem that the specimen of D. albuquerquei found dead on the spider’s web was not prey for the spider that built it, since its body and appendages were entire and not covered with spider silk. When alive, it had more likely gone there to seek prey such as other Emesinae that have been found on spider’s webs ( Wygodzinsky 1966, Pape 2013, Gil-Santana et al. 2015, Kulkarni & Ghate 2016). The record of longer, obliquely inclined setae on the distal dorsal half and an apical cluster of stiff setae of the fore tibiae of this species, features that are presumably compatible with an arachnophilous association ( Pape 2013), reinforces this hypothesis.

Specimens examined. BRAZIL, Rio de Janeiro, MALE HOLOTYPE: Petrópolis, Alto da Mosela , xi.1956, Albuquerque leg. ( MNRJ) ; 1 male, Nova Friburgo (22º17'S 42º29'W, ca. 1049 m a.s.l.), 4.xi.2005, found dead on a spider web on a wall of a house, H. Gil-Santana leg. ( MNRJ) .

Figures

FIGURES 1 – 4. 1 – 2, Dohrnemesa albuquerquei, males, dorsal view, 1, holotype deposited in MNRJ, 2, specimen found dead on a spider web, scale bar 5.0 mm. 3 – 4, Dohrnemesa carvalhoi, dorsal view, 3, female holotype deposited in MNRJ, 4, male, scale bar 5.0 mm.