Scolomus clypeatus Araujo & Santos, 2018

Araujo, Rodrigo O., Vivallo, Felipe & Santos, Bernardo F., 2018, Discovery of two new Andean species of Scolomus (Townes & Townes), with a key to all known species (Hymenoptera: Ichneumonidae: Metopiinae), Zootaxa 4429 (1), pp. 189-194 : 191-192

Scolomus clypeatus Araujo & Santos sp. nov.

( Figs 1, 2 )

Diagnosis: Body covered with silvery pubescence; female supra-clypeal area with clusters of setae, seemingly bifurcate due to their aggregate nature. Clypeus approximately rectangular, wider than in other species, width 3.00× its height, and with distinct elongate bristles (longer than the other bristles of the body). Head yellow with antenna and region between ocelli dark brown. Mesosoma dark brown, except pronotum, mesoscutum, tegula, axilla, scutellum, postscutellum and metanotum, yellowish. Female with hypopygium large and triangular in lateral view. Fore wing with large rhomboid areolet.

Description. Holotype female ( Figs 1, 2 ). Approximate body length: 6.37 mm. Fore wing length: 5.44 mm; antenna length: 5.80 mm; number of flagellomeres: 30; head 1.20× as wide as high (front view); distance between eye and lateral ocellus 1.50× as long as diameter of lateral ocellus; frons smooth, female supra-clypeal area with clusters of setae, seemingly bifurcate due to their aggregate nature; clypeus 3.00× as wide as high; mandible 6.35× as long as basal width (front view); malar space 1.60× as long as mandible basal width; number of palpomeres: 5:4; pronotum polished; mesopleuron punctate on upper, anterior, and lower margins; areolet rhombic, 0.80× as wide as long; hind wing with five hamuli; vein CU/1b absent; hind femur 5.10× as long as wide; hind tibia 7.30× as long as wide; hind basitarsus 5.90× as long as wide; mesosoma generally smooth, polished and finely punctate; propodeum smooth, with isolated punctures, costula and anterior transverse carina present; median longitudinal carina of propodeum present and incomplete; lateral longitudinal and posterior transverse carinae complete; anterior transverse and median longitudinal carinae incomplete; area basalis, petiolaris and posteroexterna discernible; T1 smooth, with isolated punctures; dorsolateral carina of T1 absent; post-petiole 2.20× as long as maximum width; glymma deep, seemingly with thin membrane between both sides; T2 3.30× as long as its height (lateral view); tergites III–VII similarly sculptured; hypopygium large and triangular in lateral view, 1.55× as long as wide; ovipositor short and needle-shaped, 12.50× as long as basal width.

Head yellow with antenna and interocellar area dark brown. Mesosoma dark brown, except pronotum, mesoscutum, tegula, axilla, scutellum, postscutellum and metanotum, yellowish. Wing hyaline; pterostigma brown. Metasoma with T1-T4 green, T5 onwards dark brown. All coxae, trochanters, femora and tibiae yellowish green, tarsi brown. Body covered by silvery pubescence.

Type material: Holotype female: Chile, Cautín , Conquillo National Park. 16-18-I-2015. B. Santos col. ( AMNH).

Type locality: CHILE: Región de la Araucanía: Cautín ( Conquillo National Park ).

Distribution: CHILE: Región de la Araucanía: Cautín (Conquillo National Park).

Etymology: The specific epithet of this species make reference to its clypeus, wider than the other species of the genus.

Comments: Scolomus clypeatus sp. nov. is most similar to S. maculatus sp. nov. because of the clusters of seemingly bifurcate setae in the supra-clypeal area of females; both also have the body predominantly green, present as well in the other Chilean species, S. magellanicus . The two species can be differentiated by (1) the width of the clypeus: S. clypeatus sp. nov. has a larger clypeus, with rectangular aspect ( Fig. 1 ), 3.00× as wide as long, (vs. 2.30× in S. maculatus ); (2) distance between eye and lateral ocellus>1.50× the diameter of lateral ocellus in S. clypeatus sp. nov. (vs. up to 1.00× in S. maculatus .); (3) S. clypeatus sp. nov. has a smaller areolet, 0.80× as wide as long (vs. 1.00× in S. maculatus sp. nov.); (4) in lateral view, hypopygium 1.55× as long as wide in S. clypeatus sp. nov. (vs. 1.90× in S. maculatus sp. nov.); (5) ovipositor>10.00× as long as basal width in S. clypeatus sp. nov. (vs. 5.30× in S. maculatus sp. nov.); (6) color: S. clypeatus sp. nov. has the head, mesoscutum, postscutellum and pronotum entirely yellow (vs. head and pronotum green, mesoscutum yellow with dark brown spots on its lateral lobes and around the scutellum in S. maculatus ). Both new species have a lightly petiolate areolet, rhombic, with vein 2RS joining rs-m shortly before touching 3RSa, while S. magellanicus has a pentagonal areolet, with vein 2RS and rs-m touch 3RSa independently. The male of this species is unknown.

Figures

FIGURES 1–2. Scolomus clypeatus new species. 1: holotype female, head (frontal view); 2: holotype female, habitus. Scale bars (mm): Figs 1 = 0.4; Figs 2 = 2.0.