Acanthocephala flaviantennata, 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 : 297-300

Acanthocephala flaviantennata n. sp.

( Figs 11-14 ; 30 )

urn:lsid:zoobank.org:act:A2FB3E52-77EA-4B49-8F58-01454047B57D

TYPE MATERIAL. — Holotype. Colombia. • “ ♂ Amazonas / Leticia Monifue / Amena 70 m Chagra / AdHoc 29 Marzo 2005 / Col: Chávez et. Al // COREIDAE 180 / AdHoc Nocturno / Chaqra. Chávez / Gl. Hernández / 29 Marzo 2005 // MPUJ-HEM-10008 [yellow label] // ME417 [yellow label] [ PUJ]”( Figs 11A , C-E; 12A, B, D, F; 13).

Paratypes. Colombia • “ ♂ Amazonas / Lorica Comunidad / [unintelligible words] BTF. / 29 msnm. 04 Oct 2004 / AdHoc 11:00–11:25 am / Col. S. Arango // adhoc nocturno/ Bosque al lado de / chagra/ S, Arango, A. Diaz, F. / Sanchez/ COREIDAE [ PUJ] ( Figs 11B ; 12C, E ; 14 A-D)” • “ ♀ Amazonas Leti / cia. Com Monifue Ame / na BTF. 04 Oct 2004 / 20 msnm. Escobar l., / Tores b, Vasquez c. // MPUJ-HEM10003 [yellow label] // ME250 [yellow label] [ PUJ]” • “ ♀ Amazonas / Leticia, Monifue Amena / BIF 6 oct 2005 / pitfall, Suarez J. / García A. Cruz D. [ MLP]” • ♀ “ Amazonas / Leticia. Col Estudiantes / Biologia E Florez // UNAL-10007 [yellow label] // ME415 [yellow label] [ UNAL]” .

TYPE LOCALITY. — Colombia, Amazonas.

ETYMOLOGY. — The name refers to the remarkable yellowish antenna of this species.

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

DESCRIPTION OF HOLOTYPE ( Fig. 11A )

General

General color dark brown to black, with antennae, and anterior and middle legs paler.Total length 26.50, length of head 2.68.

Head ( Figs 11C, D )

With sparse semierect yellowish setae. Paler areas next to ocelli, posterior margin of eye with a yellowish fringe; inner area of antenniferous tubercle, buccula, gula, and neck light brown. Dorsal margin of tylus slightly elevated at base, apex slightly projected upwards, reaching dorsal margin of head. Post-tylus depression deep, 1.8 times shorter than interocellar space. Length of tylus 1.03, length of post-tylus depression 0.38. Eyes globose and protuberant, large in relation to the size of the head; in lateral view, tangential to dorsal margin of head. Width of eye 0.92, ocular distance 3.07, synthlipsis 1.28, ocellar distance 1.08, interocellar space 0.66. Buccula small, subtriangular, reaching the anterior third of eye.Antenna longer than the body. Scape with inner side longitudinally ridged. Scape, pedicel, and basiflagellomere pale brown, with abundant semierect dark stiff setae; distiflagellomere orange, with abundant decumbent yellowish setae and semierect sparse darker stiff setae. Length of antennal articles: scape 6.50, pedicel 5.00, basiflagellomere 4.67, distiflagellomere 13.50; width of antennal articles: scape 0.44, pedicel 0.28, basiflagellomere 0.28, distiflagellomere 0.25. Labium pale brown, apex of segment IV darker; extending to mesocoxae. Length of labial segments: I 2.53, II 2.35, III 1.97, IV 1.83.

Thorax

Pronotum ( Fig. 11E ): with erect yellowish setae all over the surface, and short decumbent setae on posterior lobe; anterior lobe and calli smooth and unarmed; posterior lobe punctate with short, smooth and shiny tubercles partially anastomosed on posterior region; anterolateral margins straight and slightly crenulated; humeral angles expanded and not elevated, tuberculated, ending in a subacute spine slightly directed backwards; humeral distance 1.2 times longer than width of abdomen; posterolateral margins tuberculated, triangular processes short. Width of humeral angles 10.00. Scutellum: longer than wide, with conspicuous transversal rugosities, and decumbent yellowish setae and sparse darker erect setae; base elevated with two small median tubercles; apex yellowish and incrassate. Length of scutellum 3.76, width 3.86. Thoracic pleurae: brown, with sparse short semierect yellowish setae; metathoracic gland auricle yellowish, anterior lobe of auricle black and elongate, posterior lobe elongate; evaporatory area paler than rest of pleurae, with conspicuous rugosities ( Fig. 12A ), supracoxal area of metapleura incrassate posteriorly. Thoracic sterna: brown, with abundant erect yellowish setae; mesosternal anterior projection concolorous.

Hemelytra. Clavus and corium black, with punctures along and next to veins and in the center of the cells, with short decumbent yellowish setae on punctures, veins paler; costal margin smooth; membrane dark brown and glabrous, veins concolorous. Length of hemelytra 21.87.

Legs. Pro- and mesotrochanters unarmed, metatrochanter with two small brown setiferous tubercles ventrally. Pro- and mesofemora dark brown, paler basally; anterior, posterior, and dorsal margins unarmed, ventral rows of spines ending in a large apical spine, except on anterior row of profemur that is smaller. Metafemur dark brown, four times wider than profemur ( Fig. 12B ); dorsal margin with two rows of conical setiferous tubercles; posterior row with a basal larger tubercle; ventral margin with two rows of spines; anterior row with narrow conical black spines becoming larger to the middle and ending on a bidentate apical projection; posterior row with conical tubercles becoming larger to the apex and ending on an apical bidentate projection; anterior margin unarmed; posterior margin with a row of conical setiferous tubercles, basal tubercle larger. Pro- and mesotibiae unarmed, brown, apical third yellowish. Metatibia dark brown, apex yellowish ( Fig. 12D ); dorsal expansion unarmed, gradually enlarging on basal third, maximum width distally, from where it slightly narrows to become wider to the apex, and ending rounded forming a straight angle; ventral margin slightly expanded on basal third, bordered by two rows of irregular conical black setiferous tubercles, becoming larger to the apex and cross at distal third forming only one row. Tarsi yellowish. Width of profemur 0.77; length of metafemur 14.75, width 3.19; length of metatibia 16.62, width 3.43.

Abdomen

Length of abdomen 15.37, width 7.87. Terga black. Sterna brown, with short decumbent yellowish setae and sparse semierect setae. Abdominal sternite III expanded forming a subtriangular fold ( Fig. 12F ). 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 rugosities around spiracles. Spiracles black, surrounding area yellowish.

Male genitalia ( Fig. 13 ). Pygophore ( Fig. 13A, B ): Anterior opening rounded, parandria not developed; dorsal margin convex, abruptly declivent posteriorly forming a short protuberance. Parameres ( Fig. 13C ): Dorsal region of basal shank rounded, narrowing on the distal third, inner margin straight and not expanded, outer margin sinuous; arm broad as long as basal shank. Aedeagus as seen in Figure 13D , conjunctival dorsal appendices I large, lobate apically, with a small median projection between each other.

DESCRIPTION OF PARATYPE FEMALE ( Fig. 11B )

Thorax

Humeral distance as long as width of abdomen. Supracoxal area of metapleura not incrassate posteriorly.

Legs. Metatrochanter unarmed. Metafemur 2.8 times wider than profemur ( Fig. 12C ). Dorsal margin of metafemur with two rows of dark conical setiferous tubercles; anterior margin unarmed; posterior margin with a row of small conical setiferous tubercles.Ventral margin with two rows of spines; anterior row with compressed conical spines becoming larger to the apex and ending on a bidentate apical projection; posterior row with small tubercles enlarging apically, ending in an apical bidentate projection. Dorsal expansion of metatibia ( Fig. 12E ) widened to distal region of basal third, where it indents and slightly narrows and widens to the apex, ending rounded and joining the tibia in a straight angle. Expansion of the ventral margin of metatibia developed along all metatibia, rounded on basal third, abruptly constricted and running parallel to the apex, with sparse small setiferous tubercles.

Abdomen

Lateral margin of sternite III not expanded.

Female genitalia ( Figs 14 ). Sternite VII ( Fig. 14A ): Fisura short, median lobes small and rounded, overlapping with each other; plica straight, close to the posterior margin of the sternite, as long as the maximum width of first gonocoxae; posterolateral margins extending to basal third of first gonocoxae. Paratergite VIII extending to the apical third of first gonocoxae ( Fig. 14A ). Dorsal apodeme of first gonocoxae short and wide, rectangular ( Fig. 14B ). Second gonocoxae narrowed at middle, basal region narrower than apical region ( Fig. 14C ). Second gonapophysis shorter than second gonocoxa. Spermatheca ( Fig. 14D ) with seminal receptacle apically globose and rounded; flexible zone short; distal duct longer than flexible zone; dilation of the spermathecal duct rounded.

PARATYPES MEASUREMENTS (N = 1 ♂ | 3 ♀)

Total length: ♂ 27.50 / ♀ 26.00-26.87 (26.37); length of head: ♂ 2.66 / ♀ 2.62-2.72 (2.67); length of tylus: ♂ 1.02 / ♀ 0.90-1.06 (0.98); length of post-tylus depression: ♂ 0.35 / ♀ 0.32-0.38 (0.36); width of eye: ♂ 0.96 / ♀ 0.67- 1.02 (0.88); ocular distance: ♂ 3.10 / ♀ 3.04-3.14 (3.08); synthlipsis: ♂ 1.25 / ♀ 1.25-1.34 (1.28); ocellar distance: ♂ 1.12 / ♀ 1.12-1.15 (1.13); interocellar space: ♂ 0.64 / ♀ 0.58-0.67 (0.63); length of antennal articles: scape, ♂ 7.25 / ♀ 6.25-6.50 (6.33); pedicel, ♂ 5.12 / ♀ 4.37-4.62 (4.46); basiflagellomere, ♂ 4.62 / ♀ 4.12-4.37(4.25); distiflagellomere, ♂ 13.62 / ♀ 13.12-13.50 (13.33); width of antennal articles: scape, ♂ 0.35 / ♀ 0.38-0.42 (0.40); pedicel, ♂ 0.32 / ♀ 0.29-0.32 (0.30); basiflagellomere, ♂ 0.26 / ♀ 0.26-0.29 (0.27); distiflagellomere, ♂ 0.26 / ♀ 0.29-0.32 (0.31); length of labial segments: I, ♂ 2.73 / ♀ 2.54-2.73 (2.65); II, ♂ 2.58 / ♀ 2.30-2.54 (2.38); III, ♂ 2.21 / ♀ 1.97-2.21 (2.07); IV, ♂ 1.88 / ♀ 1.74-1.83 (1.80); width of humeral angles: ♂ 10.37 / ♀ 9.50-10.25 (9.87); length of scutellum: ♂ 3.90 / ♀ 3.57-3.99 (3.82); width of scutellum: ♂ 3.67 / ♀ 3.15- 3.57 (3.41); length of hemelytra: ♂ 24.50 / ♀ 20.87-23.12 (21.96); width of profemur: ♂ 0.80 / ♀ 0.77-0.79 (0.78); width of metafemur: ♂ 3.43 / ♀ 2.21-2.33 (2.25); length of metafemur: ♂ 16.37 / ♀ 13.62-14.37 (13.87); width of metatibia: ♂ 3.20 / ♀ 4.04-4.23 (4.10); length of metatibia: ♂ 17.50 / ♀ 15.12-16.25 (15.54); length of abdomen: ♂ 16.50 / ♀ 15.37-16.00 (15.58); width of abdomen: ♂ 9.37 / ♀ 9.00-9.50 (9.21).

Figures

FIG. 11. — Acanthocephala flaviantennata n. sp.: A, male holotype, dorsal view; B, female paratype, dorsal view; C, head, dorsal view; D, head, lateral view; E, pronotum. Scale bars: A, B, 10 mm; C, D, 1 mm; E, 2 mm.

FIG. 12. — Acanthocephala flaviantennata n. sp.: A, metathoracic gland and evaporatory area;B, male metafemur; C, female metafemur; D, male metatibia; E, female metatibia; F, lateral expansions on abdominal sternite III, ventral view. Abbreviations: see Material and methods. Scale bars: A, 1 mm; B-E, 5 mm; F, 1 mm.

FIG. 13. — Acanthocephala flaviantennata 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. 14. — Acanthocephala flaviantennata 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.