Acanthocephala pilosa, Olivera & Dellapé & Melo, 2024

Olivera, Leonela, Dellapé, Pablo M. & Melo, María Cecilia, 2024, Description of eight new species of the genus Acanthocephala Laporte, 1833 from South America (Hemiptera, Coreidae, Acanthocephalinae), Zoosystema 46 (12), pp. 285-318 : 306-310

Acanthocephala pilosa n. sp.

( Figs 21-23 ; 30 )

urn:lsid:zoobank.org:act:ED653AA8-E748-44F9-9BBD-0029E7E96170

TYPE MATERIAL. — Holotype. Brazil • “ ♂ Rondonia / 62 km SE Ariquemes / 7–18 Nov 1995 / W.J. Hanson // UNAM-10010 [yellow label] // ME360 [yellow label] [ UNAM].]”.

TYPE LOCALITY. — Brazil, Rondônia, 62 km SE Ariquemes.

ETYMOLOGY. — Referring to the abundant, long setae of the body of this species.

DISTRIBUTION. — Only known from Brazil ( Fig. 30 ).

DESCRIPTION OF HOLOTYPE ( Fig. 21A, B )

General

General color reddish brown. Total length 33.12, length of head 3.29.

Head ( Figs 21C, D )

With sparse semierect and decumbent yellowish setae. Vertex brown with darker areas behind eyes, inner margin of antenniferous tubercles yellowish. Dorsal margin of tylus curving upward apically, not surpassing dorsal margin of head. Post-tylus depression deep, 2.8 times shorter than interocellar space. Length of tylus 1.28, length of post-tylus depression 0.42. Eyes globose and protuberant, small in relation to the size of the head. Width of eye 0.80, ocular distance 3.62, synthlipsis 1.97, ocellar distance 1.50, interocellar space 1.17. Buccula semicircular, with the margin pale brown, reaching the anterior third of the eye. Antenna pale reddish brown, as long as the body. Scape, pedicel, and basiflagellomere with sparse yellowish decumbent setae and abundant semierect darker stiff setae; distiflagellomere paler, with abundant decumbent yellowish setae and short sparse semierect darker stiff setae. Length of antennal articles: scape 9.00, pedicel 7.12, basiflagellomere 5.75, distiflagellomere 12.00; width of antennal articles: scape 0.75, pedicel 0.50, basiflagellomere 0.37, distiflagellomere 0.37. Labial segments I-II brown, segments III-IV yellowish, apex of segment IV brown; extending to mesocoxae; segment III shortest. Length of labial segments: I 2.96, II 2.77, III 1.83, IV 2.30. Thorax

Pronotum ( Fig. 22A ): with sparse semierect yellowish setae, and longer decumbent setae forming a dense patch on anterior lobe; anterior lobe and calli smooth and unarmed; posterior lobe punctate with sparse smooth and shiny tubercles more abundant on posterior region and humeral angles; anterolateral margins straight with well-developed conical tubercles; humeral angles wide, expanded and strongly elevated over pronotal surface, ending in a lateral wide spine; humeral distance 1.3 times longer than width of abdomen; posterolateral margin with well-developed tubercles, triangular processes extremely short. Width of humeral angles 15.62. Scutellum: slightly wider than long, punctate, with decumbent yellowish short setae, and darker erect setae all over the surface; base elevated with two well-developed tubercles; apex yellowish and incrassate. Length of scutellum 4.25, width 4.37. Thoracic pleurae: reddish brown, with abundant long decumbent yellowish setae and sparse semierect setae; propleura with scarce small tubercles concentrated under humeral angles; metathoracic gland auricle and evaporatory area orange, anterior and posterior lobes of auricle elongate; evaporatory area with conspicuous rugosities ( Fig. 22B ), supracoxal area of metapleura slightly incrassate posteriorly. Thoracic sterna: brown, with abundant long yellowish erect and decumbent setae; mesosternum with a longitudinal yellowish stripe; mesosternal anterior projection yellowish.

Hemelytra. Clavus and corium reddish brown, entirely punctate, with abundant long decumbent yellowish setae; costal margin unarmed; membrane dark brown with sparse decumbent setae, veins concolorous. Length of hemelytra 24.87.

Legs. Protrochanter unarmed, meso- and metatrochanters with two small ventral dark brown setiferous tubercles (larger on metatrochanter). Femora with long decumbent yellowish setae and stiffer setae all over the surface. Pro- and mesofemora brown, paler basally. Anterior, posterior, and dorsal margins of profemur unarmed. Anterior and posterior margins of mesofemur unarmed, dorsal margin with a row of conical setiferous tubercles with their apex darkened; ventral rows of spines on pro- and mesofemora ending in a large apical spine, posterior row with smaller spines. Metafemur brown, 2.8 times wider than profemur ( Fig. 22C ); dorsal margin with two rows of conical setiferous tubercles with their apex darker, posterior row with smaller tubercles; ventral margin with two rows of spines with their apex darker; anterior row with narrow conical black spines becoming larger to the middle and ending on a tridentate apical projection; posterior row with conical tubercles becoming larger to the apex and ending on an apical bidentate projection; anterior and posterior margins with sparse small setiferous tubercles. Pro- and mesotibiae unarmed, orange. Metatibia ( Fig. 22D ) brown, apical region, and margin of dorsal expansion orange. Dorsal expansion developed, maximum width at distal basal third, from where it slightly narrows to the apex, ending in a straight angle; distal margin with small tubercles; apical margin with a small setiferous tubercle at middle; ventral margin slightly expanded on basal third, margin with two rows of irregular setiferous tubercles with their apex dark, becoming larger to the apex and cross at distal third forming only one row. Tarsi orange. Width of profemur 1.37; length of metafemur 17.62, width 3.87; length of metatibia 19.37, width 3.37.

Abdomen

Length of abdomen 16.87, width 11.25. Terga black, scar of scent glands openings and posterior region of segment VI yellowish, continuing with a longitudinal fringe along segment VII ( Fig. 22E ). Sterna brown, with abundant yellowish decumbent and semierect setae all over the surface. Abdominal sternite III expanded forming a fold. Area of insertion of trichobothria and surrounding area yellowish, detached in sternites III and IV, and forming one macula on the rest of segments. Lateral areas with punctures and rugosities around spiracles. Spiracles and the surrounding area yellowish.

Male genitalia ( Fig. 23 ). Pygophore ( Fig. 23A, B ): Dorsal opening rounded, parandria well-developed; dorsal margin in lateral view slightly rounded and declivent posteriorly. Parameres ( Fig. 23C ): basal shank long, longer than arm; outer region rounded, narrowing to the apex, inner margin straight and not expanded, outer margin concave. Arm broad, subtriangular, ending in a blunt short protuberance. Aedeagus as seen in Figure 23D , conjunctival dorsal appendices I elongate.

FEMALE

Unknown.

Figures

FIG. 21. — Acanthocephala pilosa n. sp., male holotype:A, dorsal view;B, ventral view;C, head,dorsal view;D, head,lateral view.Scale bars:A,B,10 mm;C,D,1 mm.

FIG. 22. — Acanthocephala pilosa n. sp.: A, pronotum; B, metathoracic gland and evaporative area; C, male metafemur; D, male metatibia; E, abdominal tergites in dorsal view. Abbreviations: see Material and methods. Scale bars: A, C-E, 5 mm; B, 0.5 mm.

FIG. 23. — Acanthocephala pilosa n. sp., male genitalia: A, pygophore lateral; B, pygophore dorsal; C, right paramere, lateral views; D, aedeagus. Abbreviations: see Material and methods. Scale bars: A, B, D, 1 mm; C, 0.5 mm.

FIG. 30. — Distributional map of the new species of the genus Acanthocephala Laporte, 1833 described in the present work.