Anticyphon oyonensis, Ruta, Rafał, 2016

Ruta, Rafał, 2016, Anticyphon gen. nov., a new genus of Scirtidae (Coleoptera: Scirtoidea) inhabiting high altitude Andean cloud forests and páramo formation, Zootaxa 4175 (4), pp. 301-318 : 309-310

Anticyphon oyonensis sp. nov.

( Figs 1 C–D, 2D–F, 3B, 5, 8, 9)

Type material. Holotype, male ( ZMUC): “ PERU, Dept. Lima \ 30: 10 km N Oyón \ Quabrada Quichas \ Pueblo Quichas , 4000 m \ 24.–26.ii.1987 \ O. Karsholt leg. \ Zool. Mus. Copenhagen ” . Paratypes, 3 males, 1 female ( ZMUC): same data as holotype .

Diagnosis. Body shape, size and granulate punctation of pronotal disc make this species similar to A. ecuadorensis sp. nov. and A. peruvianus sp. nov. Identifiable on the basis of male genitalia morphology: penis with curved parameroids, distinctly shorter than median process of trigonium. Tegmen with subtriangular parameres. Female of A. oyonensis sp. nov. can probably be distinguished from other—currently unknown—females of other species of Anticyphon gen. nov. on the basis of vulvar and bursal sclerites morphology.

Description. Male. Body oval, small, slightly flattened, clothed with brownish procumbent setae. Colouration of dorsum brown, antennae and legs yellowish brown. Head small, 1.6× wider than interocular space, covered with granulate punctures; eyes relatively big, protuberant; frons without depressions. Each mandible with small subtriangular denticle on inner margin. Antennae as in genus description. Pronotum small, transversely rectangular, sides slightly curved, widest at posterior angles, anterolateral angles broadly rounded, not produced; disc moderately convex. Punctation of pronotum granulate, both on lateral and central portions. Pronotum without distinct pits along basal margin. Each elytron with 2 subtly marked longitudinal carinae. Elytral punctation irregular, relatively dense; punctures separated by ca. 0.7 diameter. Penis ( Fig. 8 A) moderately large (L 1.22 mm, W 0.42 mm), parameroids relatively short, curved, pointed at apices; trigonium with long and very narrow median process and two short lateral lobes, median process longer than parameroids, pala much longer than parameroids, narrow; tegmen ( Fig. 8 B) relatively small (L 0.85 mm, W 0.44 mm), with wide, subtriangular parameres, pointed at apices; sternite VIII ( Fig. 8 C) small (L 0.24 mm, W 0.38 mm), widely V-shaped, with sparse setae in apical portions; sternite IX ( Fig. 8 D) relatively small (L 0.37 mm, W 0.37 mm), consisting of two subtriangular hemisternites, lightly sclerotized, with setose apical portion; tergite VIII ( Fig. 8 E) (L 0.57 mm, W 0.54 mm) with square apical plate, apical portion covered with dense microsetae, apical margin with row of dense, short setae intermixed with sparse, longer ones, apodemes much shorter than apical portion; tergite IX ( Fig. 8 F) (L 0.54 mm, W 0.41 mm) narrower than tergite VIII, central portion membranous.

Female. Externally not differing from males. Sternite VIII elongate (L 1.30 mm, W 0.30 mm), with sinuate apodemes which are not fused basally, apex with sparse setae. Tergite VIII very long (L 1.86 mm, W 0.72 mm); apical portion subtrapezoidal, with sparse setation on apical margin; apodemes long, 4× longer than apical portion. Ovipositor ( Fig. 9 A) long (L ca. 2.8 mm); branchlets present; coxites (L 0.48 mm) membranous, triangularly elongate, narrow, not covered with setae; styli with two tufts of setae at apex. Vagina ( Fig. 9 B) membranous, with 5 small, irregular sclerites; two bursal sclerites ( Fig. 9 C) present: larger, rod-like (L 0.61 mm, W 0.11 mm), and smaller, H-shaped (L 0.20 mm, W 0.10 mm), both in membranous socket (L 0.80 mm, W 0.35 mm); bursella ( Fig. 9 D) covered with oval, petagonal and hexagonal cuticular structures.

Measurements and ratios. Males (n = 3): TL 4.25–4.65 mm (4.52 mm), PL 0.70–0.75 mm (0.72 mm), PW 1.55–1.65 mm (1.61 mm), EL 3.65–4.00 mm (3.87 mm), EW 2.45–2.60 mm (2.55 mm), TL/EW 1.73–1.79 (1.77), PW/PL 2.20–2.33 (2.25), EL/EW 1.49–1.54 (1.52), EL/PL 5.21–5.71 (5.40). Females (n = 2) TL 4.25–4.50 mm (4.38 mm), PL 0.75 mm, PW 1.55–1.60 mm (1.58 mm), EL 3.65–3.85 mm (3.75 mm), EW 2.30–2.50 mm (2.40 mm), TL/EW 1.80–1.85 (1.82), PW/PL 2.07–2.13 (2.10), EL/EW 1.54–1.59 (1.56), EL/PL 4.87–5.13 (5.00).

Distribution. Known only from the type locality ( Fig. 14 ).

Etymology. Named after Oyón Province, where the type locality of A. oyonensis sp. nov. is located.

Figures

FIGURE 1. Anticyphon gen. nov., habitus. A) A. davidsoni sp. nov., B) A. ecuadorensis sp. nov., C) A. oyonensis sp. nov., female, D) A. oyonensis sp. nov., male E) A. paramoensis sp. nov., light form, F) A. paramoensis sp. nov., dark form, G) A. peruvianus sp. nov., H) A. santanderensis sp. nov. Scale bars = 1.0 mm.

FIGURE 8. Anticyphon oyonensis sp. nov., male genitalia. A) penis, B) tegmen, C) sternite VIII, D) sternite IX, E) tergite VIII, F) tergite IX. Scale bar = 0.5 mm.

FIGURE 9. Anticyphon oyonensis sp. nov., female genitalia. A) genitalia, B) vaginal sclerites, C) bursal sclerites, D) bursella. Scale bar = 1.0 mm.

FIGURE 14. Distribution of Anticyphon gen. nov. Please note that precise locality of A. peruvianus sp. nov. is unknown (see note under the species description).