Dilasia carvalhoi, 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 : 21

Dilasia carvalhoi n. sp.

( Fig. 44 )

Diagnosis: This species is so far, the only known representative of the genus of the western hemisphere in which both sexes demonstrate brachyptery. The species is also characterized by the short, apically rounded left paramere.

Description: Measurements, see Table IV. Male: Dorsal view: General coloration reddish-brown with basal half of hemelytra and legs pale brown. Dorsal setae short, those on lateral margins longer. Head: Smooth, eyes small and ocelli greatly reduced; prolonged anteriorly from base of antennae; antennal segment II thick, shorter than head (segments I:II:III:IV) 1: 2.5: 2.2: 2.2. Thorax: Pronotum small, with lateral margins straight, anterior margin rounded, posterior margin slightly concave. Anterior lobe smooth, posterior lobe rugose. Mesosternum and metasternum not sulcate medially ( Fig. 52 ), the latter one elongated posteriorly. Forefemora unarmed, pads well developed ( Fig. 50 ); foretibiae armed with teeth and spines ( Fig. 51 ). Hemelytra rugose, short, venation developed. Membrane reduced, reaching seventh abdominal segment. Abdomen: Hairs on dorsal surface restricted to outer margins. Pygophore ( Fig. 53 ) with presence of characteristic punctures on dorsal central and subapical areas ( Fig. 54 ). Genitalia with left paramere short, nearly straight, slightly widened subapically, narrow but not acute apically ( Fig. 55 ). Female: Similar to male in coloration and dimensions. Antennal segments (I:II:III:IV) 1: 2.1: 2.3: 2.2.

Distribution: Brazil. ( Fig. 48 )

Material examined: Holotype, BRAZIL: ♀ (Santa Catarina), Nova Teutonia , 27º11’08’’–50º23’01’’, 300–500 m (o. s. l.), 13-VII-1958, Fritz Plaumann, H. H. Harris, coll. 1977. USNM ; Paratype, ♂ same data than Holotype, slide-mounted genitalia and some remains of this specimen. USNM .

Etymology: This species honours to Prof. José Cândido de Melo Carvalho, one of the most important heteropterists of the 20th century.

Discussion. The left paramere of this species is similar to that of D. foveicollis , however it may be easily distinguished by its brachyptery and absence of midfovea on the pronotum as well as by its coloration and measurements.

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 50–55. Dilasia carvalhoi. Male. 50, Fore leg; 51, Foretibia showing the row of spines (Sp) in the inner margin; 52, Metasternum; 53, Pygophore; 54, Detail of punctures on pygophore (PP) visible from above; 55, Detail on left paramere.

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