Dilasia gracilicornis, 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 : 26-27

Dilasia gracilicornis n. sp.

( Fig. 47 )

Diagnosis: Characterized by the long and narrow left paramere as well as the long and slender second antennal segment.

Description: Measurements, see Table IV. Male: Dorsal aspect: General coloration dark brown with the extreme base of corion, small spot at inner margin of cuneal fracture, labium, legs, and basal half of antennal segment II paler. Setae short dorsally and of a more homogeneous size centrally than on margins. Head: Smooth, slightly prolonged anteriorly from the base of antennae; eyes small, interocular space wider than eye width ( Fig. 79 ); antennal segment II slender, gradually thickened apically, and longer than head. Antennal segments (I:II:III:IV) 1: 2.8: 2.5: 2.4. Thorax: Pronotum small, with lateral margins slightly sinuate. Anterior margins not rounded, posterior margin slightly concave. Anterior lobe smooth, posterior lobe strongly rugose. Mesosternum and metasternum not sulcate medially; the latter prolonged posteriorly ( Fig. 83 ). Foretibiae armed with spines ( Fig. 80 ); forefemora unarmed, pads medium-sized ( Fig. 81 ). Hemelytra smooth ( Fig. 82 ). Abdomen: Hairs on dorsal surface long and restricted to outer margins. Characteristic copulatory spines on the left margin of sternite VI ( Fig. 84 ). Genitalia with left paramere long, slightly sinuate, not widened subapically and apically acute ( Fig. 85 ); a short prominence beneath the paramere. Aedeagus not armed with two lateral and subapical feather-like structures. Female: Similar to male in coloration and measurements. Antennal segments (I:II:III:IV) 1: 2.5: 2.1: 1.8.

Distribution: Peru. ( Fig. 48 )

Material examined: Holotype PERU: ♂ Ucayali, Kirigueti (at light), VII-2004, J. Williams, 73º07’08’’W – 11º38’17’’S. MACN . Paratypes: 3 ♂ same data as for Holotype. MACN ; ♂ same data (slide-mounted). MACN ; 3 ♂, 1 ♀ Cusco, Cashiriari , 4–22-VII-2005 (at light), J. Williams, MACN ; 2 ♂ same data (slide-mounted). MACN .

Etymology: The specific name refers to the shape of second antennal segment long and slender.

Discussion: This species belongs to the D. galateae group (together with D. similis and D. crassicornis ) as demonstrated by its dorsal aspect, but may be distinguished from them by the proportionally very long and narrow left paramere and by the antennae.

Figures

FIGURES 43–47. Species of genus Dilasia. 1. 43, D. ashlocki Female, allotype (2.24 mm); 44, D. carvalhoi Female, holotype (2.24 mm); 45, D. colludens Male (2.27 mm); 46, D. crassicornis Male holotype; 47, D. gracilicornis Male paratype.

FIGURES 79–85. D. gracilicornis. Male. 79, Head and pronotum; 80, Foretibia showing a reduced pad (Fos) and the row of spines (Sp) on internal margin; 81, Apex of foretibia; 82, Hemelytron; 83, Sternum and base of abdomen showing the metasternum (Ms); 84, Copulatory spines (Csp); 85, Detail of left paramere.

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