Dilasia neotropicalis, Carpintero, 2014

Carpintero, Diego Leonardo, 2014, Western Hemisphere Lasiochilinae (Hemiptera: Heteroptera: Anthocoridae) with comments on some extralimital species and some considerations on suprageneric relationships, Zootaxa 3871 (1), pp. 1-87 : 32-34

Dilasia neotropicalis n. sp.

( Fig. 92 )

Diagnosis: Characterized by its homogeneously dark dorsal coloration, the long labium, that reaches the midcoxae and by the occurrence of brachypterous forms.

Description: Measurements, see Table IV. Male: Dorsal view: General coloration homogeneous dark brown with labium, legs, and abdomen paler. Setae dorsally medium-sized and being of a more homogeneous size centrally area than on margins. Head: Smooth, prolonged anteriorly from the base of antennae; eyes small, interocular space wide ( Fig. 125 in female); antennal segment II thick, and longer than head. Antennal segments (I:II:III:IV) 1: 2.3: 1.9: 1.8. Labium reaching midcoxae. Thorax: Pronotum small, with lateral margins straight, anterior margin rounded; posterior margin slightly concave; anterior lobe smooth, posterior lobe strongly rugose ( Fig. 126 ). Mesosternum and metasternum not sulcate medially; the latter prolonged posteriorly ( Fig. 128 ). Foretibiae armed with spines; forefemora unarmed. Hemelytra smooth ( Fig. 127 ). Abdomen: Hairs on dorsal surface short and restricted to outer margins. Copulatory spines short, very thick and densely arranged ( Fig. 124 ). Genitalia: After returning specimens to USNM, I lost the pygophore of the sole male I had retained. However, I could study some secondary structures on abdomen. Female: Similar to male in coloration and measurements. Genitalia ( Fig. 129 ) with parietovaginal gland present ( Fig. 131 ), seventh sternite with punctures centrally ( Fig. 130 ). Brachypterous forms present. Antennal segments (I:II:III:IV) 1: 2.5: 2.1: 2.0.

Distribution: Argentina, Brazil, Guyana, Peru. ( Fig. 49 ).

Material examined: Holotype ARGENTINA: ♀ Misiones, P. N. Iguazú, (Carpintero). MACN ; Paratypes ♀ same locality, XI-1990 Carpintero. MACN ; ♀ same locality, (at light), X-1980, Carpintero, (slide-mounted). MACN ; ♀ Entre Rios, Concordia , I-1980. MACN ; BRAZIL: ♂ Santa Catarina, Nova Teutonia , 13-III-1951, F. Plaumann. USNM ; ♀ same locality, 17-V-1951. USNM ; ♂ same locality, 2-VIII-1952. (slide-mounted) MACN ; ♀ same locality 26-VIII-1952. USNM ; 2♂ same locality, 23/ 24-X-1952. USNM ; ♀ same locality, 31-X-1952. USNM ; ♂ same locality, IV-1953. USNM ; 6♂, 6♀ same locality, V-1953. USNM ; ♂ 4♀ same locality, VI-1953. USNM ; ♂ same locality, 23-VI-1955. USNM ; ♂ same locality, 8-VII-1955. USNM ; 2♂ same locality, 24-VIII- 1955. USNM ; ♂ same locality, 1-IX-1955. USNM ; ♂ same locality, 5-X-1955. USNM ; ♀ same locality, 6-X-1955. USNM ; 2♀ same locality, 9-X-1955. USNM ; ♂ 2♀ same locality, 27º11’S 52º23’W, VI-1958, ex litter, Brit. Mus. 1959-604. BMNH ; GUYANA: ♀ Demerara Soweyo, Gdf. Camp., 50km SW of Georgetown, at sheet, 150 Watt Tungsten light, 27/ 30-IX-1951, S. H. Martin coll. B.M. 1951-182. BMNH ; PERU: ♀ (brachycere), Cusco, Quebradas Salineras , 3500m (above sea level), B. V. & J. S. Ridout, B. M. 1972-55, 9-VIII-1972. BMNH .

Etymology: The specific name refers to the widespread distribution of this new species.

Discussion: This species belongs to the fuscula group together with D. reuteri , D. unicolor , D. microps and D. carvalhoi as may be seen by the shape of head and pronotum; however, it may be easily distinguished from them by the length of labium (reaching the midcoxae). Presence of a brachypterous specimen can be understood as an adaptation to living near a salt mine 3500 meters above sea level.

Figures

FIGURES 86–94. Species of genus Dilasia. 2. 86, D. foveicollis Male; 87, Idem. Male, holotype (1.75 mm); 88, D. fuscula Female, syntype (2.83 mm); 89, D. galateae; 90, D. microps; 91, Idem. Female holotype (2.53 mm); 92, D. neotropicalis Female holotype (2.65 mm); 93, D. punctipennis (2.56 mm); 94, Idem. Male holotype.

FIGURES 124–131. D. neotropicalis. Male. 124, Copulatory spines (Csp). Female. 125, Head; 126, Pronotum; 127, Hemelytron; 128, Sternum and base of abdomen showing the metasternum (Ms); 129, Genitalia; 130, Detail of punctures (Pfg); 131, Parietovaginal gland (PG).

FIGURES 48–49. Distribution of Dilasia (I, II).