Acanthocephala brunnea, 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 : 291-294

Acanthocephala brunnea n. sp.

( Figs 5-7 ; 30 )

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TYPE MATERIAL. — Holotype. Colombia • “ ♀ Meta, San Martín, / Vda. Puerto Castro, Finca Hato / Palmera , 3°30’56.56’’N / 72°26’0.14’’W, 21 nov 2014 – / 11 dic 201[4], Col: José Ramírez // MPUJ-HEM-10007 [yellow label] // ME373 [yellow label] [ PUJ]”.

TYPE LOCALITY. — Colombia, Meta, San Martín, Vda. Puerto Castro, Finca Hato Palmera.

ETYMOLOGY. — From de Latin brunneus, brown, to denote the brownish coloration of the species.

DISTRIBUTION. — Colombia ( Fig. 30 ).

DESCRIPTION OF HOLOTYPE ( Fig. 5A, B )

General

General color reddish brown. Total length 29.62, length of head 3.10.

Head ( Fig. 5C, D )

With sparse decumbent yellowish setae and semierect sparse setae. Vertex brown with paler areas next to ocelli, ocellar tubercles dark brown. Tylus light brown, dorsal margin of tylus straight at base, apex strongly projected upwards, overpassing dorsal margin of head. Post-tylus depression deep, 1.4 times shorter than interocellar space. Length of tylus 1.34, length of post-tylus depression 0.35. Eyes globose and protuberant, small in relation to the size of the head. Width of eye 0.80, ocular distance 3.15, synthlipsis 1.64, ocellar distance 1.41, interocellar space 0.94. Buccula large, subrectangular, reaching anterior third of eye. Antenna shorter than body. Scape, pedicel, and basiflagellomere reddish brown, with abundant semierect dark long stiff setae; distiflagellomere reddish, with abundant decumbent yellowish setae and semierect sparse shorter setae. Length of antennal articles: scape 6.75, pedicel 5.25, basiflagellomere 4.37, distiflagellomere 10.00; width of antennal articles: scape 0.51, pedicel 0.35, basiflagellomere 0.35, distiflagellomere 0.35. Labium brown, apex of segment IV black; extending to mesocoxae. Length of labial segments: I 2.73, II 2.58, III 1.64, IV 2.16.

Thorax

Pronotum ( Fig. 6A ): with dense long erect yellowish setae on anterior lobe, and short decumbent yellowish setae all over the surface; anterior lobe smooth with two well-developed rounded tubercles behind margin of collar; calli with two rounded tubercles between them; posterior lobe punctate with abundant, rounded, smooth and shiny tubercles irregularly arranged; anterolateral margins straight with well-developed conical tubercles; humeral angles subtriangular, expanded and slightly elevated over the pronotal disc, tuberculate; humeral distance 1.3 times larger than width of abdomen; posterolateral margins tuberculate, triangular processes extremely short. Width of humeral angles 14.37. Scutellum: wider than long, punctate with transversal rugosities, with abundant decumbent yellowish setae and longer erect and darker setae; base elevated with two small, rounded tubercles, followed by a transverse depression; apex incrassate and yellowish. Length of scutellum 4.46, width 4.23. Thoracic pleurae: brown, with abundant long decumbent yellowish setae; propleura with sparse small tubercles under humeral angles; metathoracic gland auricle and evaporatory area yellowish, anterior and posterior lobes of auricle elongate; evaporatory area with conspicuous rugosities ( Fig. 6B ), supracoxal area of metapleura not incrassate. Thoracic sterna: brown, with abundant long yellowish erect and decumbent setae; mesosternum with a longitudinal median yellowish stripe, mesosternal anterior projection yellowish.

Hemelytra. Clavus and corium dark brown, claval suture paler, entirely punctate, with abundant decumbent yellowish setae; costal margin smooth; membrane brown and glabrous, veins concolorous.

Legs. Trochanters unarmed. Femora reddish brown, with short decumbent yellowish setae, and longer and darker semierect setae all over the surface.Anterior, posterior, and dorsal margins of profemur unarmed. Mesofemur with anterior and posterior margins unarmed, dorsal margin with a row of conical setiferous tubercles. Ventral rows of pro- and mesofemora ending in a small apical spine. Metafemur brown, 2.5 times wider than profemur ( Fig. 6C ); dorsal margin with two rows of conical setiferous tubercles with the apex dark. Ventral margin with two rows of spines; anterior row with narrow conical spines slightly compressed at base, becoming larger to the apex and ending on a bidentate apical projection; posterior row only evidenced by the apical bidentate projection and a few small tubercles only developed from the middle to the apex; anterior and posterior margins unarmed. Tibiae reddish brown. Pro- and mesotibiae unarmed. Dorsal expansion of metatibia developed ( Fig. 6D ), maximum width basally, from where it narrows and runs parallel to the tibia until apex and ending in a straight angle; apical margin with a small setiferous tubercle; ventral margin expanded, evident on basal third, margin bordered by two rows of irregular setiferous tubercles becoming larger to the apex and cross at basal third forming only one row distally. Tarsi reddish brown. Width of profemur 0.99; length of metafemur 14.87, width 2.50; length of metatibia 15.00, width 3.62.

Abdomen

Length of abdomen 15.62, width 11.00. Terga black, scars of scent glands surrounded by a yellowish spot ( Fig. 6E ). Sterna brown except posterior margin of segment IV and V darker, with abundant decumbent yellowish setae and semierect setae all over the surface. Lateral margin of sternites III and IV not expanded. Area of insertion of each trichobothria and surrounding area yellowish. Lateral areas with punctures around spiracles. Spiracles black, surrounding area yellowish. Female genitalia ( Figs 7 ). Sternite VII ( Fig. 7A ): fisura long, median lobes quadrangular and well-developed, overlapping with each other; plica slightly convex, close to the anterior margin of the sternite, as long as the maximum width of first gonocoxae; posterolateral margins extending to median third of first gonocoxae. Paratergite VIII extending to the apex of first gonocoxae ( Fig. 7A ). Dorsal apodeme of first gonocoxae narrow, apex rounded ( Fig. 7B ). Second gonocoxae narrow, basal region more sclerotized than apical region ( Fig. 7C ). Second gonapophysis as long as second gonocoxae. Spermatheca ( Fig. 7D ) with seminal receptacle apically globose and oval; flexible zone short; distal duct longer than flexible zone; dilation of the spermathecal duct elongate.

MALE

Unknown.

Figures

FIG. 5. — Acanthocephala brunnea n. sp., female 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. 6. — Acanthocephala brunnea n. sp.: A, pronotum,detail of humeral angles and triangular processes; B, metathoracic gland and evaporative area; C, female metafemur; D, female metatibia; E, abdominal tergites in dorsal view. Abbreviations: see Material and methods. Scale bars: A, 5 mm; B, 0.5 mm; C-E, 5 mm.

FIG. 7. — Acanthocephala brunnea n. sp., female genitalia: A, pregenital and genital segments; B, first gonocoxa and gonapophysis; C, second gonocoxa and gonapophysis; D, spermatheca. Abbreviations: see Material and methods. Scale bars: A, 5 mm; B, 1 mm; C, D, 0.5 mm.

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