Stenoeurilla mesoamericana Brailovsky & Barrera 2019, sp. nov.
Creators: name: Brailovsky, Harry
name: Barrera, Ernesto
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Coreidae
Stenoeurilla
Stenoeurilla mesoamericana

description: Stenoeurilla mesoamericana sp. nov.
(Figs. 5, 9, 13, 18, 21, 25)
Description. Holotype male. Dorsal coloration. Head: yellow with ocellar tubercle, postocular tubercle, wide spot behind postocellar tubercle, external border of antenniferous tubercle, and two broad stripes running lateral to middle line black; antennal segment I pale castaneous-orange, with basal joint black, segments II and III pale castaneous-orange with apical joint darker, and IV dark brown. Pronotum: dark reddish castaneous with posterolateral margin including the humeral angles and posterior margin black with bluish green reflections; collar yellowish white with punctures dark castaneous-orange; anterior lobe including the calli pale yellowish white, covered with white farinaceus area; posterior border yellow; pronotal disk with pale yellow longitudinal medial stripe; anterolateral border with anterior third yellow and posterior third dark castaneous with bluish green reflections. Scutellum: dark reddish castaneous with bluish green reflections; lateral margins, apex and longitudinal medial stripe yellow. Hemelytra: clavus and corium dark castaneous-orange with claval and corial veins, costal boarder, apical angle and apical margin yellow; hemelytral membrane dark brown with basal angle black or dark with bluish green reflections. Abdomen: connexival segments III–VI yellow with posterior margin dark brown, and VII yellow with inner margin dark brown; dorsal abdominal segments III–VI black except for paired submedian yellow squares on each segment; segment VII black (Fig.9). Ventral coloration. Head yellow with quadrate spot on middle third and narrow elongate spot behid eyes black; rostral segments yellow (apex of IV black); pro-, meso-, and metasternum black; propleura dark castaneous-orange with anterior half yellow and posterior half with white farinose area; mesopleura dark castaneous-orange; metapleura dark castaneous-orange with black opaque spot near the metathoracic peritreme; anterior and posterior lobes of metathoracic peritreme yellow; coxae of each leg shiny black with inner margin yellow; fore and middle leg pale orange; hind leg pale orange with inner and outer dilation of hind tibiae dark reddish orange with one yellow spot on each expansion; abdominal sterna pale orange with following areas black: one row of discoidal spots lateral to middle line, two spots on sternite III and close to basal third, two spots on sternite IV near anterior border, and posterior margin of sterna V and VI black; pleural margins including the spiracles yellow (Fig. 13); genital capsule dark castaneous-orange with area close to the posteroventral margin black. Structure. Head: rostrum reaching posterior border of metasternum; rostral segment I reaching the anterior border of prosternum. Pronotum: collar present; frontal angles rounded, not exposed; callar region densely pilose; humeral angles slightly exposed, subacute. Legs: femora ventrally armed with a single row of numerous small spines-like teeth; hind tibiae with inner dilation lanceolate, occupying 49 % of the total length of hind tibiae; outer dilation expanded, barely phylliform, with one shallow emargination, occupying 60 % of the total length of hind tibiae (Fig. 18). Hemelytra: macropterous, extending beyond apex of last abdominal segment. Genital capsule: posteroventral edge with rounded median notch (Fig. 21). Parameres. Fig. 25.
Female. Color and habitus similar to male holotype. Antennal segment IV dark brown with sub-basal dark yellow ring; connexival segments and abdominal segments VIII–IX black; posterior margin of abdominal sterna IV–V dark reddish brown to black. Structure. Hind tibiae with inner dilation lanceolate, occupying 64 % of the total length of hind tibiae; outer dilation expanded, with one shallow emargination, occupying 71 % of the total length of hind tibiae.
Measurements. Male. Body length 13.90; head length 1.50; width across eyes 2.15; interocular distance 0.86; preocular distance 0.71; interocellar distance 0.34; antennal segments: I 3.10, II 4.25, III 3.10, IV 6.00; pronotum length 2.70; width across humeral angles 3.75; scutellum: length 1.90, width 1.45; hind tibiae: total length 8.71; length inner dilation 4.30; length outer dilation 5.30; width inner dilation 0.30; width outer dilation 1.10.
Measurements. Female. Body length 15.57; head length 1.55; width across eyes 2.30; interocular distance 0.91; preocular distance 0.70; interocellar distance 0.32; antennal segments: I 3.10, II 3.80, III 3.05, IV 5.90; pronotum length 3.25; width across humeral angles 4.30; scutellum: length 2.25, width 1.75; hind tibiae: total length 9.40; length inner dilation 6.10; length outer dilation 6.70; width inner dilation 0.43; width outer dilation 1.38.
Type material. Holotype, male, Costa Rica, Turrialba, 19-VI-1951, leg. O. L. Cartwright (USNM). Paratypes, 1 male, Costa Rica, Turrialba, 19-VI-1951, leg. O. L. Cartwright (UNAM). 1 male, Costa Rica, Alajuela, 20 km S Upala, 22–31-V-1991, leg. F. D. Parker (UNAM). 1 male, Costa Rica, Cartago, Turrialba, 20 -
VIII-1989, leg. F. D. Parker (UNAM). 1 female, Costa Rica, Prov. Cartago, CATIE, 3 km SE Turrialba, 600 m, 14- v-1985, Leg. J. Chemsak (UNAM).
Etymology. The specific epithet “mesoamericana” is an adjective, meaning Central America, and refers to the known geographic distribution of this species.
Distribution. Costa Rica.
Diagnosis. Stenoeurilla mesoamericana sp. nov., shares these characters with S. hansoni (Brailovsky & Barrera, 1997) and S. herediana: anterior and posterior lobes of metathoracic peritreme yellow; antennal segment I pale castaneous-orange with basal joint black, and segments II and III pale castaneous-orange with apical joint dark brown to black. Stenoeurilla mesoamericana is easily distinguished from the other two in having the pro-, meso-, and metasternum black; abdominal segments black with a yellow square on either side of the midline on segments III–VI (Figs. 9, 13); anterior pronotal disk including the calli yellowish white and covered with white farinaceus area; posterior margin black with bluish green reflections; and antennal segment IV of male entirely dark brown (In female dark brown with sub-basal dark yellow ring). In S. hansoni and S. herediana the pro-, meso-, and metasternum are yellow; the antennal segment IV dark brown with sub-basal yellow ring; the pronotal disk with callar region yellow without white farinose marks; and posterior margin dark castaneous-orange or dark yellowishorange without black and bluish green reflections.
The three species are clearly distinguished by the color of dorsal and ventral abdominal segments (Figs. 7–9, 11–13).
description: Published as part of Brailovsky, Harry & Barrera, Ernesto, 2019, A revision of the Costa Rican species of Stenoeurilla Brailovsky & Barrera (Hemiptera: Heteroptera: Coreidae: Stenoscelideini), with the description of two new species, new distributional records, synonymical note, and key to the known species, pp. 545-556 in Zootaxa 4550 (4) on pages 552-554, DOI: 10.11646/zootaxa.4550.4.4, http://zenodo.org/record/2625649