Acrotaphus tibialis (Cameron, 1886)

Pádua, Diego G., Sääksjärvi, Ilari E., Monteiro, Ricardo F. & Oliveira, Marcio L., 2020, Review of the New World genus Acrotaphus Townes, 1960 (Hymenoptera: Ichneumonidae: Pimplinae), with descriptions of fifteen new species, Zootaxa 4719 (1), pp. 1-62 : 52-54

Acrotaphus tibialis (Cameron, 1886)

( Figs 191–199 )

Epimecis tibialis Cameron, 1886: 217 . Lectotype ♀, Mexico (BNHM), designated by Townes & Townes, 1966: 19 [exam- ined].

Acrotaphus tibialis (Cameron) , Townes & Townes, 1960: 256

Diagnosis. This species can be distinguished from all other species of Acrotaphus by the combination of the following characters: 1) margin of gena flat behind eyes in dorsal view; 2) posterior ocelli separated from eyes by 0.1× (0.1–0.3× in male) its diameter in dorsal view; 3) hind leg orange, with distal 0.3–0.4 of tibia and tarsus blackish; 4) ovipositor 1,5–1.7× as long as hind tibia.

Comments. Additional characters to the original description (♀) are as follows: body [22.0] 15.0–22.0 mm; lower face [0.9] 0.7–1.0× as broad as high (from supraclypeal suture to base of antenna); margin of gena behind eyes flat in dorsal view; margin of gena [0.4] 0.4–0.5× length of eye in dorsal view; posterior ocelli separated from eyes by [0.1]× its diameter in dorsal view; distance from tegula to head greater than [0.5] 0.5–0.6× distance from tegula to hind margin of propodeum; epicnemial carina present ventrally, extending until reaching the level of the lower corner of pronotum laterally; fore wing [17.0] 9.0–17.0 mm; cu-a opposite to the base of Rs&M; 2 rs-m [0.7] 0.7–0.9× as long as abscissa of M between 2 rs-m and 2 m-cu; hind wing with abscissa of Cu 1 between M and cu-a [1.15] 0.9–1.2× length of cu- a; tarsal claw with basal lobe quadrangular, with claw apex slightly overtaking the posterior margin of lobe; tergite I [1.8] 1.7–1.9× as long as posteriorly broad; tergite II [1.8] 1.5–1.8× as long as posteriorly broad; tergite III [1.3] 1.3–1.5× as long as posteriorly broad; tergites IV–V [1.3] 1.1–1.5× as long as pos- teriorly broad; ovipositor robust, [1.5] 1.5–1.7× as long as hind tibia; lower valve with swelling in the mid region.

Male. ( Figs 194–195 ). Similar to female in structure and coloration, except margin of gena 0.5× length of eye in dorsal view; posterior ocelli separated from eyes by 0.1–0.3× its diameter in dorsal view; sternite IX ( Fig 197 ) longer than high, with lateral and anterior margins strongly sclerotised, lateral margin flat and posterior margin slightly concave, with few bristles widely spaced posteriorly. Genital capsule ( Figs 198–199 ): Paramere truncated apically, slightly narrower than the parameral lamina, with bristles except in posterior margin; volsellar lamina with bristles anteroapically spaced in anterior margin and with a set of about three to six bristles in anterolateral region, just below the base of the digitus; cuspis robust with about four to six teeth aligned in the mid part until apex and with four to eight few bristles spaced on apical region; digitus with teeth in apex, rounded distally and angular ventrally, with the margins of the apical region narrower than base; aedeagus with few teeth on apex and its apex slightly curved downward in lateral view.

Distribution. Colombia **, Costa Rica, Guatemala, Mexico *, Panama, USA, Venezuela ** ( Fig 200 ).

Biological notes. Parasitoid of Metazygia sp. ( Gauld, 1991) and Argiope trifasciata (Forsskal, 1775) ( Eberhard, 2013) .

Material examined. Lectotype: ♀, MEXICO,Valladolid,Yucatán(Gaumer), #HYM3.G.848[sic],#010202128, BNHM. Colombia: Meta, PNN [=Parque National Naturale] Sumapaz, Cabaña Las Mirlas, 03°48’N / 73°52’W, 710 m., Malaise, 20.viii–05.ix.2003 (A. Torrijos leg.), ♀, M.4341 [?], #53025, IAVH. Costa Rica: S. [= San] J. [= Jose], San Antonio de Escazu, 1300 m., 30.iii.1984 (W. Eberhard), ♀, BNHM; Alajuela, Ca. Esparta, 800 m. (?) [sic], xi.1981 (without collector), ♀, BNHM. Mexico: Temascal, Oax. [=Oaxaca], 21.ix.1963 (D.H. Janzen), 2♀, #203,391 and #203,392, EMEC; idem, but Chis. [=Chiapas], 3000 ft., 20 mi. N. de Huixtla, 01.vi.1969 (W. R. M. Mason), ♀, CNC; idem, but 20–25 mi. N. de Huixtla, 04.vi.1969 (B. V. Peterson), ♂, CNC; Veracruz, Estacion [de] Biol. [= Biologia] Los Tuxtlas, 24.vi.1989 (J.L. Colin), ♂ [with last metasomal tergites extracted], #5435, UNAM. Panama: Chiriqui, Irhe, Los Planes, 16 km Ne Gualaca, 8,6237, -82,2171, 20.i.1992, Light Trap, 800 m. (H. Stockwell), ♀, #ENT_0118827, STRI [digital image sent by Annette Aiello]. Venezuela: Mérida, Río Frío, via Tucaní, Mun. [=municipality] Caracciolo Parra y Olmedo, Finca El Pedregal Cacao, T. [= Trap] Malaise, 01–17.vii.2009, ♀, UCLA; idem, but 01–28.viii.2009, ♂, UCLA; La. [= Lara], Torres, Sicarigua, 17.xii.1980 (J. R. Alvarez), ♂, UCLA. USA: Texas, Hidalgo City, Bentsen Rio Grande Valley State Park , 10.vi.1977 (C. Porter), ♀, FSCA; idem, but 08.vi.1977, 4♀ and 2♂ [with last metasomal tergites extracted], FSCA; idem, but 23.v.1977, ♀, FSCA.

Figures

FIGURES 191–200. Acrotaphus tibialis (Cameron): 191, habitus, ♀ (lectotype); 192, head, dorsal view, ♀ (lectotype); 193, face, frontal view, ♀ (lectotype); 194, tarsal claw, ♀; 195 habitus, ♂; 196, head, frontal view, ♂; 197, sternite IX, ♂; 198, genital capsule, lateral view, ♂; 199, genital capsule, ventral view, ♂. Scale bars =0.2 mm. 200. Distribution of Acrotaphus tibialis (Cameron) in the Neotropical region.