Polyphrix tullu, Inga & Alvarado, 2024

Inga, Lita & Alvarado, Mabel, 2024, Two new species of the genus Polyphrix Townes 1972 (Hymenoptera, Ichneumonidae, Cryptinae) from Peru, Zootaxa 5497 (2), pp. 267-275 : 271-273

Polyphrix tullu sp. nov.

Figs 3 , 4C

Material examined. Holotype: 1♀ “ PERU: MD. Manu , Los Amigos Biological Station, 228m, 12°33’25.7’’S 70°04’46.6’’W, 11.vi.2016, Yellow pan trap, N. Zenteno leg.” ( MUSM) . Paratype: 1♀ similar to holotype but 21.vi.2016 and 1♀ “ PERU, MD, Albergue Refugio Amazonas 12º52’30”/69º24’35” 231 m 24.ii.2016 J. Grados // WIRED AMAZON PROYECT PAN TRAP ” ( MUSM) .

Diagnosis. Polyphrix tullu sp. nov. may be distinguished from all other species by the combination of the following characters: pronotum and mesoscutum mostly black, metasomal tergites 2–8 black with apical white stripe and hind femur orange. It is quite similar to P. stellata but differs in having the metasoma with tergites 2–8 black with apices white (vs. orange), and pronotum with upper margin black (vs. yellow).

Description. Female holotype.

Fore wing 9.5 mm. Body entirely shiny, scarcely punctate and very sparsely pilose. Head ( Fig. 3B,D ): antenna with 32 flagellomeres; clypeus scarcely punctate, CWH 1.56, CWW 1,22 apex slightly convex; mandible and palpi sparsely pilose; mandible moderately long, MLW 2.0, MWW 0.58, ventral tooth slightly longer and more robust than dorsal tooth; occipital carina moderately high, sharp, uniformly curved, ending far from hypostomal carina, at distance as large as basal width of mandible; MSM 0.67.

Mesosoma ( Figs 3A, 3C,D ): pronotum with very weak and short wrinkles at posterior margin of collar ventrally; dorsal margin regular, neither swollen nor prominent; mesoscutum subcircular; notaulus almost absent, traceable only in tangent anterior view; lateral carina of scutellum distinct only on anterior 0.2; epicnemial carina restricted to ventral 0.70 of mesopleuron, almost straight, mesopleuron dorsad of carina giving rise to short and very weak transverse strigulation; mesopleural fovea shallow; mesopleural suture straight, narrow and crenulate; median portion of postpectal carina very weak, short and slightly arched forward; metapleuron smooth, shiny, with sparse hairs; justacoxal carina present only as very short subvertical ridge; transverse furrow at base of propodeum centrally 0.7 as long as distance anterior transverse carina to anterior margin of propodeum, measured centrally. Legs: hind pre-apical tarsomere slightly bilobed; FLW 7.50. Propodeum anterior margin centrally concave; SWL 2.33; anterior transverse carina straight, area behind it with 12 or 13 distinct straight transverse wrinkles, either complete or incomplete, posterior ones stronger and sharper. Wings ( Figs 3A,E ): fore wing vein 1-Rs+M distinctly sinuous, without bulla; crossvein 1m-cu uniformly arched, slightly shorter than 1-Rs+M; vein 1M+Rs anteriorly straight, posteriorly arched; crossvein 1cu-a straight, forming straight angle with M+Cu, ending basad of vein 1M+Rs by about 0.2 its own length; crossvein 2cu-a 0.24 as long as vein 2-Cu; cell 1+2Rs (areolet) of moderate size, APH 0.20, transversely rectangular, AWH 1.50; crossvein 3r-m spectral, distinctly longer than 2r-m; hind wing vein M+Cu forming straight angle with vein M; HW1C 1.14; vein 2-Rs entirely tubular; crossvein 1r-m with bulla at ventral 0.3; veins 1-Rs and 2-Rs distinctly angled; vein Cub straight, reaching about 0.8 of distance to wing margin; vein 2-1A reaching about 0.85 of distance to wing margin.

Metasoma ( Figs 3A,D,F ): first tergite elongate, slender, T1LW 3.26, T1WW 2.09; spiracle at center, weakly protuberant; T2LW 1.10, T2WW 1.46; tergites 3–8 smooth, shiny, pilose; OST 1.14; ovipositor moderately slender, straight, scarcely punctate, laterally strongly compressed; dorsal valve with nodus and notch, ventral valve with eight apical teeth; apex moderately long, pointed.

Color ( Fig. 3 ). Head mostly black, except for flagellomeres T7–19 white, apically flagellomeres dark brown; supra-clypeal area, clypeus, mouth parts, base of mandible, malar space and para-ocular stripe pale yellow. Mesosoma predominantly orange; pronotum black, except for anterior margin, pale yellow; mesoscutum black, centrally with large W-shaped pale-yellow mark; scutellum predominantly pale yellow, ventrally brown; tegula anteriorly pale yellow, posteriorly brown; subalar prominence pale yellow; fore leg predominantly orange, tibia and tarsomere 1–4 pale yellow, tarsomere 5 brown; mid leg predominantly orange, tarsomere 4–5 brown; hind leg with coxa and tibia orange, trochanter, trochantellus and femur dark orange, basitarsus pale yellow, tarsomeres 2–4 off-white tarsomere 5 brown. Metasoma: Tergites usually black; T1 basally orange to apically black, apical stripe pale yellow; T2 basally (at the center) dark orange; T2–7 basally black with apical and lateral stripes pale yellow; T8 basally black with lateral stripes pale yellow; S1–3 pale yellow with small black stripes on the sides; ovipositor dark red, sheaths dark brown; wings hyaline.

Variation of female paratypes. Fore wing length 8.9–10.2 mm. They differ from the holotype in the following features: head with antenna with 33 flagellomeres, CWH 2.00–2.36, CWW 1.18–1.26, MLW 1.92–2.10, MWW 0.54–0.60, MSM 0.50; Mesosoma with legs FLW 7.40–7.44, SWL 1.40–2.00, area behind it with 8 or 9 distinct straight transverse wrinkles; fore wing APH 0.15–0.23, AWH 1.50–2.13; hind wing HW1C 0.89–1.15; metasoma with T1LW 3.64–4.33, T1WW 1.50–1.57, T2LW 1.65–2.60, T2WW 1.56–1.85, OST 1.59. Within the coloration varies in having the pronotum with anterior margin pale yellow, solely ventrally (not along the entire margin); one individual with trochantellus and femur brown.

Male. Unknown.

Distribution. Peru, Madre de Dios Department ( Fig. 4C ).

Etymology. The specific epithet ‘ tullu’ means ʻthinʼ in Quechua, noun in apposition.

Figures

FIGURE 3. Polyphrix tullu sp. nov., female, holotype. A. habitus, lateral view; B. head, front view; C. pronotum, lateral view; D. mesosoma and metasoma, dorsal view; E. wings; F. ovipositor tip, lateral view. Scale bar = 1 mm

FIGURE 4. Geographic records of Polyphrix. A. Polyphrix stellata; B. Polyphrix varians. C. Polyphrix misa sp. nov. and Polyphrix tullu sp. nov. Yellow circles represent new records and red represent previous records.