Cavichiassus punctatus Domahovski 2021, sp. nov.

Cavichiassus punctatus sp. nov.

(Figs 1 ‾20)

Type locality. S„o José dos Pinhais, Paraná, Southern Brazil.

Measurements (mm). Holotype male: total length 5.0. Paratype (male), 5.0; (female), 5.7.

Coloration. Male: Head and thorax (Figs 1 ‾4) background yellow. Crown (Fig. 3) with many small black spots; anterior portion with large black macula continuous with frons almost completely black, except lateral margins yellow (Fig. 4). Ocelli red. Pronotum and mesonotum (Figs 1 ‾3) with many small black spots. Forewing (Figs 1, 2, 5) with appendix smoky and black maculae on apical margin. Legs with few black punctuations. Female: Head and thorax with few black maculae; frons completely yellow.

Description. External morphological characters as in generic description.

Male terminalia. Sternite VIII (Fig. 6) strongly convex, ca. 1.6 times longer than sternite VII; ventral surface with many small setae; lateral margins slightly rounded; posterior margin almost straight, slightly longer medially. Valve rectangular, more than twice as long as wide, broadly fused to pygofer; ventral margin whit short lobe produced between bases of subgenital plates. Pygofer (Fig. 8), in lateral view, 1.7 times longer than maximum height; dorsal margin excavated medially; dorsoposterior margin fused to pygofer lobes; anteroventral margin rounded, with small setae; posteroventral margin straight, slightly folded inwards; apex broad and truncated; macrosetae short, distributed on apex and posteroventral margin; ventral process (Figs 7‾9) arising near base of subgenital plate and produced ventrally, as long as subgenital plate, flattened laterally; basal portion weakly sclerotized; ventral margin with one row of thin setae; apical portion truncated, forming a blunt ventral projection and acute dorsal process. Anal tube (Fig. 7) membranous, without processes. Subgenital plate (Fig. 8), in lateral view, produced posteriorly only as far as basal fifth of pygofer; in ventral view (Fig. 10), elongated, ca. three times longer than wide, weakly sclerotized and without setae; basal portion with elongated apodeme produced anterad; inner margin straight; external margin broadly rounded; apex rounded. Style (Fig. 11), in lateral view, very long and curved, with apodeme directed dorsad and apophysis directed posterad; apophysis tapered toward apex; apex acute, with dorsal margin serrated. Aedeagus (Figs 12, 13) with preatrium reduced; dorsal apodeme strongly developed, forming pair of rounded lobes produced anterad and curved laterally and pair of elongated processes directed posterad, almost reaching the apex of aedeagus; shaft slightly curved dorsally, tapered toward apex, with lateral margins carinated; gonopore subapical on posterior surface. Other characteristics as in generic description.

Female terminalia. Sternite VII (Figs 14, 15) 1.5 times wider than long; ventral surface with short setae; posterior margin almost straight. Internal sternite VIII membranous. Pygofer (Figs 14, 15) with ventral margin broadly rounded; apex broad, truncated; few macrosetae present only near apex. First valvifer (Fig. 16) approximately triangular, 1.5 times higher than long. First valvula (Fig. 16) with dorsal and ventral margins almost parallel, ca. 6 times longer than high at base; ventral interlocking device long, extending over basal two-third; dorsal sculpturing starting before the mid-length; apical portion (Fig. 17) with ventral sculpture present near apex, continuous with the dorsal sculpture, apex gradually tapered and acute. Second valvula (Fig. 18) ca. 10 times longer than high; apical portion (Fig. 19) without teeth on ventral margin; apex rounded. Second valvifer (Fig. 20) ca. three times higher than long. Gonoplac (Fig. 20) 4.3 times longer than high; dorsoapical margin long, with half length of gonoplac; external surface without dentiform cuticular projections; apex tapered, subacute. Other characteristics as in generic description.

Material examined. Holotype male: “ Brasil, Paraná, S„o José \ dos Pinhais 25º36’01.40”S \ 49º11’24.66”W Malaise-3 \ 880m 19‾ 26.IX.2016 \ A.C. Domahovski leg.” (DZUP). Paratypes: 1³, same data as holotype, except 12-19.IX.2015 (DZUP); 1³, same data as holotype, except 19-26.IX.2020 (DZUP); 1♀, same data as holotype, except 10-17.X.2020 (DZUP); 1♀, same data as holotype, except 24-31.X.2020 (DZUP); 1♀, “ Brasil, Paraná, S. [S„o] J. [José] dos\ Pinhais, 25º36’18”S \ 49º11’37”W 880m \ 01-31.X.2019 Malaise \ A.C. Domahovski leg” (DZUP).

Etymology. The new species name refers to the coloration with several black punctations on the head and pronotum.