Acanthocephala macrotuberculata, 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 : 304-306

Acanthocephala macrotuberculata n. sp.

( Figs 18-20 ; 30 )

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TYPE MATERIAL. — Holotype. Colombia • “ ♀ Tolima / Mnpo. Cunday/ vereda el edén/ 500 msn 13-03-[19]99/ B. enciso [ PUJ] // MPUJ-HEM-10000 [yellow label] //ME356 [yellow label]”.

TYPE LOCALITY. — Colombia, Tolima, Municipio Cunday, Vereda el Edén, 500 m.

ETYMOLOGY. — The name refers to the large tubercles of the pronotum of this species.

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

DESCRIPTION OF HOLOTYPE ( Fig. 18A, B )

General

General color dark brown to black.Total length 29.37, length of head 2.91.

Head ( Fig. 18C, D )

With sparse semierect yellowish setae; head dark brown.Dorsal margin of tylus straight at base strongly projected upwards at apex, overpassing the dorsal margin of head. Post-tylus depression deep, three times shorter than interocellar space. Length of tylus 0.29, length of post-tylus depression 0.29. Eyes globose and protuberant, small in relation to the size of the head. Width of eye 0.86, ocular distance 3.10, synthlipsis 1.49, ocellar distance 1.22, interocellar space 0.86. Buccula large, semicircular, and elongate, reaching the anterior third of eye. Antenna shorter than body length. Scape, pedicel, and basiflagellomere reddish brown, with abundant semierect long dark stiff setae; distiflagellomere orange with abundant decumbent yellowish setae and semierect sparse setae. Length of antennal articles: scape 6.25, pedicel 5.37, basiflagellomere 4.37, distiflagellomere 9.25; width of antennal articles: scape 0.89, pedicel 0.70, basiflagellomere 0.70, distiflagellomere 0.70. Labial segment I brown, segments II-IV paler, apex segment IV black; extending to mesocoxae; segment III shortest. Length of labial segments: I 2.68, II 2.44, III 1.55, IV 2.02.

Thorax

Pronotum ( Fig. 19A ): with sparse long semierect yellowish setae on anterior lobe, and scattered short decumbent yellowish setae all over the surface; anterior lobe 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 tuberculated, expanded and slightly elevated, widely acute; humeral distance 1.4 times larger than width of abdomen; posterolateral margins tuberculated, triangular processes short. Width of humeral angles 14.25. Scutellum: longer than wide, punctate with transversal rugosities, with short decumbent yellowish setae, and longer and darker erect setae all over the surface; base elevated with two rounded well-developed tubercles; apex incrassate and yellowish. Length of scutellum 3.99, width 3.76. Thoracic pleurae: dark brown, with long decumbent yellowish setae; propleura with well-developed rounded tubercles more abundant under humeral angles; metathoracic gland auricle and evaporatory area orange with rugosities ( Fig. 19B ), anterior lobe of auricle oval and elongate, posterior lobe elongate; supracoxal area of metapleura not incrassate posteriorly. Thoracic sterna: dark brown, with abundant long erect and decumbent yellowish setae; mesosternal anterior projection concolorous.

Hemelytra. Clavus and corium entirely punctate, with sparse short decumbent yellowish setae, basal region of costal margin armed with small setiferous tubercles; membrane with sparse decumbent setae, veins concolorous. Length of hemelytra 23.75.

Legs. Dark brown, except pro- and mesotibiae with the basal region brown becoming yellowish distally, and tarsi paler. Proand mesotrochanters unarmed, metatrochanter with one small ventral setiferous tubercle. Pro- and metafemora with short decumbent yellowish setae, and longer and darker semierect setae all over their surface. Pro- and mesofemora with two ventral rows of spines ending in a small apical spine, posterior row restricted to apical half. Anterior, posterior, and dorsal margins of profemur unarmed. Anterior margin of mesofemur unarmed, posterior margin with small tubercles, and dorsal margin with one row of conical setiferous tubercles. Metafemur 2.6 times wider than profemur ( Fig. 19C ); dorsal margin with two rows of conical setiferous tubercles; anterior and posterior margins with a row of small setiferous tubercles; ventral margin with two rows of spines; anterior row with narrow conical spines compressed at base, becoming larger to the apex and ending on a bidentate apical projection; posterior row with small tubercles ending in an apical bidentate projection. Pro- and mesotibiae unarmed. Metatibia ( Fig. 19D ) black, apex paler; dorsal expansion developed, enlarging basally, with a notch from where it narrows parallel to the tibia until the apex, ending in a straight angle; distal margin with small sparse setiferous tubercles; ventral margin expanded, barely evident on basal third, margin bordered by two rows of irregular setiferous tubercles becoming larger to the apex and cross at distal third forming only one row. Width of profemur 0.86; length of metafemur 14.12, width 2.31; length of metatibia 14.37, width 4.25.

Abdomen

Length of abdomen 16.87, width 9.75. Terga black, scars of scent gland openings yellowish. Sterna dark brown, 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 trichobothria yellowish, surrounding area brown. Lateral areas with rugosities around spiracles. Spiracles black, surrounding area concolorous with rest of abdomen.

Female genitalia ( Fig. 20 ). Sternite VII ( Fig. 20A ): Fisura long, median lobes well-developed, quadrangular, and overlapping with each other; plica straight, close to the anterior margin of sternite, as long as the maximum width of first gonocoxae; posterolateral margins straight not projecting beyond first gonocoxae. Paratergite VIII extending to apical third of first gonocoxae ( Fig. 20A ). Dorsal apodeme of first gonocoxae wide, apex rounded ( Fig. 20B ). Second gonocoxae narrow, narrowing to the apex, with a well-developed lateral apodeme at the middle third ( Fig. 20C ). Second gonapophysis shorter than second gonocoxa. Spermatheca ( Fig. 20D ): Seminal receptacle apically globose and oval; flexible zone long; distal duct longer than flexible zone; dilation of the spermathecal duct elongate.

MALE

Unknown.

Figures

FIG. 18. — Acanthocephala macrotuberculata 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. 19. — Acanthocephala macrotuberculata n. sp.: A, pronotum; B, metathoracic gland and evaporative area; C, female metafemur; D, female metatibia. Ab- breviations: see Material and methods. Scale bars: A, C, D, 5 mm; B, 1 mm.

FIG. 20. — Acanthocephala macrotuberculata 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, 2 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.