Dohrnemesa carvalhoi 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 : 585-588

Dohrnemesa carvalhoi Wygodzinsky, 1966

( Figs. 3–12 )

Dohrnemesa carvalhoi Wygodzinsky, 1966: 231 (key), 235, 237 (description); Maldonado 1990: 83 (catalog).

Dohrnemesa carvalhoi was known until now only through its female holotype ( Fig. 3 ), which was collected on a hill (Corcovado) in the city of Rio de Janeiro, state of Rio de Janeiro, Brazil . A male of this species, attracted to light at night, collected in Nova Friburgo, another city in the mountains of the state of Rio de Janeiro, was studied here ( Figs. 4–12 ).

Remarks. Male. Selected measurements (mm): total length to tip of abdomen 9.3; to tip of forewings 10.7; length of head 1.0; pronotum: length of fore lobe 1.1; length of hind lobe 1.2; length of forewing 7.5. Fore tibiae ( Fig. 5 ) somewhat curved, without dorsal depression, with some longer, straight, obliquely inclined, pale setae on distal half dorsally, and a cluster of stiff, somewhat curved, golden setae on apical extremity ventrally.

The male examined is very similar to the female holotype. The following differences are recorded: eyes are somewhat larger; a darkened subapical area is present on forewing ( Fig. 4 ), which is whitish in female ( Fig. 3 ); abdomen is less wide at median portion; connexival lateral expansion of the fifth segment is somewhat smaller.

Last tergite prolonged posteriorly, with a rounded posterior margin, covering pygophore, leaving only tips of parameres exposed in dorsal view ( Fig. 6 ). Eight sternite with numerous short and several long setae on its exposed portion, covering approximately two thirds of the pygophore ventrally; anterior margin medially rounded towards distal portion; posterior margin sinuous, curved at midportion.

Male genitalia ( Figs. 7–12 ): pygophore subrectangular in dorsal and ventral views ( Fig. 7 ), with numerous short and moderate long, and several long setae on distal third (i.e. on naturally exposed surfaces); anterior dorsal sclerotization narrow; basal margin slightly curved backwards on midportion ventrally; posterior process triangular; apex subacute ( Figs. 7–8 ). Parameres symmetrical, distal half very curved, with several moderately long setae; apex subrounded ( Fig. 9 ). Phallus symmetrical. Basal arms of articulatory apparatus short ( Fig. 12 ); basal plate extension elongated ( Fig. 12 ), struts long, elongated, almost entirely fused, divided at extreme base and apex, at the latter much more broadly, with apical margins rounded ( Fig. 11 ). A pair of elongated somewhat narrow ventral sclerotizations on phallosoma (= ventral sclerotization of phallobase sensu Wygodzinsky 1966), followed by a pair of apparently articulated short extensions apically ( Fig. 12 ); between the sclerotizations on the phallosoma and the struts, a pair of elongated, thin, double curved and somewhat sclerotized processes, which are divergent in distal half; apex acute ( Fig. 12 ). These processes lie on a somewhat denser layer of tissue. Endosoma wall smooth ( Fig. 10 ).

Specimens examined. BRAZIL, Rio de Janeiro, FEMALE HOLOTYPE : Rio de Janeiro, Corcovado [Hill], 1959, J.C.M. Carvalho leg. ( MNRJ) ; 1 male, Nova Friburgo (22º17'S 42º29'W, ca. 1049 m a.s.l.), 28.xi.2004, attracted to light, H. Gil-Santana leg. ( MNRJ) .

Comments. Only minor differences were found between the examined male and female; it is unclear whether these are due to sexual dimorphism or individual variation, and it could be decided only when more specimens of both sexes will be available in the future. The male genitalia are generally similar to those of other species of Dohrnemesa in which they were previously documented ( Wygodzinsky 1966); the struts, however, have been recorded as short in other species of the genus, whilst they are elongated in D. carvalhoi ( Fig. 11 ).

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.

FIGURES 5 – 12. Dohrnemesa carvalhoi, male, 5, head and fore leg, lateral view, scale bar 1.0 mm, 6, apex of abdomen, dorsal view, 7 – 8, pygophore without parameres, 7, ventral view, 8, posterior view, 9, right paramere, apical two-thirds, scale bar 0.2 mm, 10, phallus, lateral view, 11, struts, dorsal view, scale bar 0.1 mm, 12, articulatory apparatus, basal plate extension, ventral sclerotizations of phallosoma and paired process of endosoma, ventral view.