Ogmocoris Mayr, 1864

Frey-da-Silva, A., Grazi, J. & Fernandes, J. A. M., 2002, Revision of the genus Ogmocoris Mayr, 1864 (Heteroptera, Pentatomidae, Pentatomini), Beaufortia 52, No. 10, pp. 179-185 : 180-181

Genus Ogmocoris Mayr, 1864

Ogmocoris Mayr, 1864: 908 ; Mayr, 1866: 34; Stal, 1872: 30; Lethierry & Severin, 1893: 132; Kirkaldy, 1909: 72; Silva, 1945: 596; Costa Lima, 1947: 312; Fernandes & Grazia, 1998: 1058.

Ansa Walker, 1868: 548.

TYPE SPECIES. - Atelocerus hypomelas Burmeister, 1835 (= Ansa distincta Walker, 1868).

DESCRIPTION. - Medium size. Body elliptical. Ventral surface more convex than dorsal one. Dorsal and ventral surfaces strongly punctured. Head as long as wide and as long as pronotum. Juga longer than or subequal to tylus. Lateral margins of juga slightly concave and emarginate; dorsal surface of juga and tylus with transverse furrows. Head, in profile, with tylus slighdy higher than juga. Antenniferous tubercles with lateral romboid spine. Antennal segment I not attaining of head; relative length of 111= V apex segments:> IV> I> II. Bucculae sinuous in profile, evanescent at base of head with small anterior tooth. Rostral I shorter than bucculae. segment Segments II and III subequal in length, longer than IV; I shortest. Segment II arched segment and flattened laterally. Rostrum surpassing posterior margin of urosternite IV

Pronotum trapezoidal, anterior 2/3 slightly declivent. Pronotum about three times wider across humeri than long. Anterior angles distinctly toothed. Anterolateral margins slighdy concave, anterior half strongly crenulated; posterolateral margins sinuous. Posterior margin rectilinear. Cicatrices concolorous, delimited by punctures, with a few punctures at middle. Prosternum slightly carinate; mesosternum carinate, metasternum shallowly concave. Sternum with white hairs. Ostiolar clavate, rugae length 1/3 of evaporatory area width. Tibiae dorsally sulcate.

Basal angles of scutellum foveate, roundapex ed, surpassing middle of connexival segment V Posterior angle of corium rounded, reaching at least middle of connexival VI. Apex of segment radial vein with or without small pale yellow callus. Hemelytral membrane hyaline, veins brown, sometimes bifurcate.

Connexivum well-exposed, lateral margins emarginate. Posterolateral angles rounded, subcalloused.

Ventral surface of abdomen slighdy sulcate medially. Spiracles black, elyptical. Each trichobothrium placed in tiny subcalloused area, separated by imaginary longitudinal line tangential to spiracles.

MALE. - Pygophore subquadrangular, globose, opening dorso-posteriorly. Posterolateral angles auriculate. Dorsal rim (dr) with median 1 / 3 posteriorly projected, slightly concave. Ventral rim (vr) forming two layers; the superior one expanded in 1 + 1 cylindrical arms (as) dorsally-directed, each one beside X; inferior layer carisegment nate with tooth-like projections (tp). Segment X (proctiger) ( X) cylindrical at base, apical half impressed on both sides, forming a single or 1 +1 longitudinal carina (cr); dorsally projected. apex Parameres well developed (pa), shape variable in species.

FEMALE. - Genital plates punctured. Spiracles present in laterotergites 8 (la8). Posterior border of laterotergites 8 angulate.

COMMENTS. - Mayr (1866) recognized the similarities in the general aspects between Ogmocoris and Mecocephala . In Mecocephala , the head is longer than wide, acuminate at and the rostrum is apex long, surpassing the middle of urosternite very VI; parameres are absent ( Schwertner et al., 2002). The shorter rostrum and the characters found in male genitalia, mainly the of presence well developed parameres, Ogmocoris separate from Mecocephala . By the absence of a tubercle at third abdominal sternite Ogmocoris belongs to section 1 of Pentatomini ( Rolston & McDonald 1984). Ogmocoris also belongs to a monophyletic group, now formed by twelve genera (Frey-da-Silva, pers. comm.). They are: Mecocephala Dallas, 1851 , Tibraca Stal, 1860 , Ogmocoris , Glyphepomis Berg, 1891 , Hypatropis Bergroth, 1891 , Paramecocephala Benvegnu, 1968 , Paratibraca Campos & Grazia, 1995 , Parahypatropis Grazia & Fernandes, 1996 , Luridocimex Grazia et al., 1998 , Amauromelpia Fernandes & Grazia, 1999 , Stysiana Grazia et al., 1999 , and a new genus being described. The relationships among these genera are under investigation. The states of characters found in male genitalia, shared by these genera, represent the synapomorphies of the vengroup: tral rim of pygophore forming two layers (one superior, one inferior), the superior one expanded in 1 + 1 cylindrical arms dorsally directed, each one beside segment X; inferior layer of pygophore carinate, with or without conical projections; parameres reduced to absent (except in Ogmocoris ); phallotheca with 1 +1 ventral digitiform conjunctiva with 1 + 1 lateral processes; vesica with a shield-like dorsal processes; process; 'ductus seminis distalis' long, helicoidal, delvery icate. The last three characters were not observed in Ogmocoris , since the males, single specimens in both species, are not dissected.

DISTRIBUTION. - Brazil ( AM, RJ, PR).