Enitharoides tricomerus Nessimian 2017, sp. nov.
Creators: name: Nessimian, Jorge Luiz
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Notonectidae
Enitharoides
Enitharoides tricomerus

description: Enitharoides tricomerus Barbosa, Ribeiro & Nessimian, sp. nov.
(Figs. 49–61, 65)
Type material. BRAZIL. Minas Gerais State—Itabirito, Vale dos Tropeiros, Cachoeira do Cascalho, 996 m a.s.l., [20°12’26.3”S / 43°38’34.1”W], barranco com raízes, 11.X.2010, (N. Ferreira Jr.): 1 m (DZRJ 3523), holotype. Serra Caraça – 1880m / MG – Brasil – XI -961/ Kloss, Lenko, Martins & Silva col.: 1 m (MZUSP), paratype. Espírito Santo State—Domingos Martins, 4-5.VI.1993, (M.R. Gomes, A.M.P.T.C. Silva): 1 m and 1 f, macropterous (DZRJ 3522), paratypes.
Description. MALE HOLOTYPE. Body length (from apex of head to apex of hemelytra): 16.8; greatest vertex width: 1.7; synthlipsis: 1.2; eye width: 2.1; head length: 1.5; greatest head width: 5.8; pronotum length: 1.9; greatest pronotum width: 6.2; scutellum length: 4.6; scutellum width: 5.0.
Color. Body with general color yellow (Fig. 49). Setae yellow to grey. Two light-brown right triangle-shaped marks on vertex, in dorsal view. Third rostral segment with a brown line along length; fourth segment entirely brown. Foveate area of pronotum dark-brown; pronotum yellow, hyaline. Scutellum with a brown strip on area covered by pronotum and laterally on punctate area (Fig. 49). Hemelytra hyaline, pale yellow, with membranal suture dark-brown. Hind wings with brown veins, mixed with hyaline and brown areas (Fig. 52). Legs yellowish with brown spots distributed throughout lateral margin of all trochanters, and along mesal margin of fore- and middle femur (Fig. 50). Ventrally abdomen yellow, connexivum tinged with brown.
External morphology. Head with greatest width 3.8 times its median length, and 3.5 times vertex width; vertex width 1.4 times synthlipsis; eye width 1.8 times synthlipsis. Pronotum with median length 1.2 times median length of head; greatest width 3.6 times its median length; posterior margin slightly concave medially. Scutellum slightly wider than long; median length 2.4 times pronotum median length; surface with regular, deep punctations in distributed throughout the entire surface except on basolateral angles, delimited by a brown mark at each side (Fig. 49). Entire ventral surface of middle femur and half of lateral surface of mesotrochanter with conspicuous and dense patch of long setae (Figs. 53, 55); anteapical pointed protuberance robust and curved at apical margin with a blunt seta at apex (Fig. 55); lateral margin with seven peg-like setae (Fig. 55). Hemelytra with nodal furrow curved anterad, almost straight, shorter than distance between its tip and membranal suture. Metaxyphus triangular, with margins almost straight, with two strips of setae (Fig. 56).
Genitalia. Posterior part of male genital capsule ending in acute angle without process. Right paramere anteriorly truncate, curved ventrally, forming a right angle with ventral margin; dorsal margin straight; posteriorly rounded; patch of setae centered on median region (Fig. 57). Left paramere angled anteriorly, dorsally straight, covered with long fine setae along dorsal margin (Fig. 58).
PARATYPES: MALE (n=2) / FEMALE (n=1). Body length (from apex of head to apex of hemelytra): 15.1– 6.1/ 14.4; greatest vertex width: 1.5–1.7/ 1.6; synthlipsis: 1.0–1.2/ 1.1; eye width: 2.0–2.2/ 1.9; head length: 1.5– 1.6/ 1.4; greatest head width: 5.0–5.5/ 5.0; pronotum length: 1.9–2.0/ 1.5; greatest pronotum width: 5.7–6.0/ 5.5; scutellum length: 4.1–4.9/ 3.8; scutellum width: 4.8–5.2/ 4.6.
Color. Male paratypes yellow to brown. Macula on scutellum over punctations, or laterally positioned. Female, in dorsal view, brown, except head and pronotum (Fig. 59). Labrum, triangle at base of second rostral segment, line along third rostral segment and fourth segment, dark brown. Scutellum brown with yellow macula laterally. Ventrally mostly brown (Fig. 60).
External morphology. Head with greatest width 3.1 to 3.7 its median length in males, 3.7 in female; vertex width 1.4 to 1.5 times synthlipsis in males, 1.5 in female. Pronotum with median length 1.2 to 1.3 times median length of head in males, 1.1 in female; greatest width of pronotum 3 times its median length in males, and 3.7 in females. Female scutellum with a few punctures apically. Middle femur setose, with setae shorter than in males. Female abdominal sternum VII rounded (Fig. 61).
Etymology. The specific epithet, tricomerus, refers to the middle femora conspicuously setose, from Greek, trico = hair and merus = thigh.
Taxonomic notes. Enitharoides tricomerus is similar to E. lucasduquei due to the large number of setae on the middle femur (Figs. 28, 53). Although the setae on E. tricomerus femur are longer and more abundant (Fig. 53), which facilitates the diagnosis, both species can also be distinguished by the anteapical pointed protuberance of the middle femur with curved margins (Fig. 54); the margins of the metaxyphus almost straight (Fig. 56); the right paramere dorsal margin is straight and anteriorly truncate, curved ventrally, forming a right angle with the ventral margin (Fig. 57). E. lucasduquei has abundant but shorter setae on the middle femur; the anteapical pointed protuberance of the middle femur has straight margins (Fig. 29); the margins of the metaxyphus are convex, tapering in the apical third to a rounded apex (Fig. 31); the right paramere dorsal margin is sinuous and anteriorly emarginated dorsal and ventrally, making it somewhat projected (Fig. 32).
description: Published as part of Nessimian, Jorge Luiz, 2017, Resurrecting the genus Enitharoides Brooks, 1953 (Heteroptera: Nepomorpha: Notonectidae): description of three new species and redescription of Enitharoides brasiliensis (Spinola, 1837), comb. nov., pp. 469-486 in Zootaxa 4323 (4) on page 480, DOI: 10.11646/zootaxa.4323.4.2, http://zenodo.org/record/995820