Dilasia crassicornis, 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 : 23-24

Dilasia crassicornis n. sp.

( Fig. 46 )

Diagnosis: Characterized by the presence of a prominence beneath the paramere and the long, thick second antennal segment.

Description: Measurements, see Table IV. Male: Dorsal view: General coloration dark brown with extreme base of corion, small spot on inner margin of cuneal fracture, labium and legs paler. Setae dorsally long, suberected. Head: Smooth, prolonged anteriorly from base of antennae; eyes small, interocular space wide ( Fig. 60 ); antennal segment II thick, slightly longer than head. Antennal segments (I:II:III:IV) 1: 3: 2.5: 2.4. Thorax: Pronotum small, with lateral margins almost straight, the anterior margin rounded, posterior margin slightly concave. Anterior lobe smooth, posterior lobe rugose ( Fig. 61 ). Mesosternum and metasternum not sulcate medially, the latter one prolonged posteriorly ( Fig. 66 ). Foretibiae armed with spines ( Fig. 62 ); forefemora unarmed, pads well developed ( Fig. 63 ). Foretrochanters with characteristic spines ( Fig. 64 ). Hemelytra smooth ( Fig. 65 ). Abdomen: Hairs on dorsal surface short and restricted to outer margins. Characteristic copulatory spines on the left margin of sternite VI ( Fig. 67 ). Pygophore ( Fig. 68 ) with characteristic punctures on dorsal central and subapical area ( Fig. 70 ). Genitalia with left paramere elongate, linear, slightly widened subapically and not acute apically ( Fig. 71 ). Small but noticeable prominence beneath the paramere ( Fig. 72 ). Aedeagus armed with two lateral and subapical feather-like structures ( Fig. 69 ). Female: Similar to male in coloration and dimensions.

Distribution: Peru. ( Fig. 48 )

Material examined: Holotype PERU: ♀ Ucayali, Kirigueti , (at light), VII-2004, J. Williams 83º07’08’’W – 11º38’13’’S. MACN ; Paratypes, ♂ (slide-mounted) and ♀ same data as Holotype MACN ; ♂ (slidemounted) same data as Holotype, 24-II.2004. MACN ; ♂ Cusco, Nuevo Mundo, Base Pluspetrol , (at light), VII- 2004, J. Williams, 73º08’30’’W – 11º33’02’’S. MACN .

Etymology: The specific name refers to shape of second antennal segment that is thick and slightly longer than head.

Discussion: This species belongs to the D. galateae group (together with D. similis and D. gracilicornis ) but can be distinguished from them by the shape of the left paramere with its short, basal “wing” and by the presence of a small prominence beneath the paramere.

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 60–72. Dilasia crassicornis. Male. 60, Head, 61, Pronotum; 62, Foretibia showing pad (Fos) and row of spines (Sp); 63, Pad; 64, Foretrochanter showing spines (Tsp); 65, Hemelytron; 66, Sternum and base of abdomen showing metasternum (Ms); 67, Copulatory spines (Csp); 68, Pygophore; 69, Detail of processus penniformis (Prp) on aedeagus; 70, Detail of punctures on dorsal surface on pygophore (PP); 71, Detail of left paramere; 72, Prominence on pygophore beneath the paramere (Pro).

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