Proarescon similis Huber, 2017

Huber, John T., 2017, Eustochomorpha Girault, Neotriadomerus gen. n., and Proarescon gen. n. (Hymenoptera, Mymaridae), early extant lineages in evolution of the family, Journal of Hymenoptera Research 57, pp. 1-87 : 35-36

Proarescon similis Huber sp. n.

Figs 153-158 , 159-164 , 165-167 , 168, 169 , 170-172 , 173, 174 , 175-176

Type material.

Holotype female (QSBG) on slide (Fig. 167 ) labelled: 1. " Proarescon similis Huber ♀ dorsal Holotype". 2. "Thailand: Surat Thani, Khao Sok Nat. Park, Klong Morg Unit, 87 m, 8°53.725'N 99°38.025'E, MT 10-17.ii.2009, Phongphan, #3937".

Paratypes. 1 female and male. THAILAND. Nakhon Si Thammarat. Namtok Yong Nat. Park, TV aerial, 966m 8°14.262'N; 99°48.289'E, 15-22.ix.2008, Malaise trap, Paiboon, #3540 (1♂ on slide, QSBG); Namtok Yong Nat. Park, Klong Jang waterfall, 8°16.283'N; 99°38.702'E, 154m, Malaise trap, 23.ii-2.iii.2009, S. Samnaokan, #4665 (1♂, CNC). Surat Thani. Khao Sok Nat. Park, 122m, 8°54.555'N; 98°30.522'E, Malaise trap, 13-20.i.2009, Pongphan, #3914 (1♀, CNC).

Diagnosis.

Female. Clava 4.7 × times as long as wide, with ventral margin distinctly concave (in P. primitivus , clava about 3.4 × as long as wide, with ventral margin almost straight); fore wing with cubital line not extending proximally beyond first apical macrochaeta, barely proximal to remainder of microtrichia (in P. primitivus , cubital line extending proximally almost to level of proximal macrochaeta, distinctly proximal to other microtrichia).

Description.

Female. Body length 740 (holotype), 634 (paratype on card). Head. Head width 182 (holotype). Face with weak elongate reticulate sculpture, vertical laterally becoming horizontal medially, with thin setae distributed on each side as follows: 2 medial to torulus and 7 ventral to torulus, the 2 setae submedially above mouth margin longer and thicker than the others (Fig. 153 ). Vertex with transverse elongate reticulate sculpture, with 1 or 2 setae on orbit of eye lateral to transverse trabecula and 2 setae between eye and posterior section of supraorbital trabecula and 1 seta lateral to posterior apex of vertexal suture; ocellar triangle (inside stemmaticum) with 1 seta between mid and lateral ocelli and 1 setae lateral to mid ocellus but outside triangle (Fig. 165 ). Malar space with 2 setae. Occiput with engraved transverse reticulate sculpture, with 1 short setae submedially and 1 sublaterally above occipital foramen. Gena with longitudinally reticulate sculpture laterally, becoming isodiametric around foramen, and with about 5 setae sublaterally and laterally. Antenna. Fl1-fl5 without mps, Fl6-fl8 each with 2 mps; clava with 6 mps. Length/width measurements: scape 166/-, pedicel 39/-, fl1 11/12, fl2 13/12, fl3 12/13, fl4 15/14, fl5 18/16, fl6 50/16, fl7 51/21, fl8 54/31, clava 143/30. Mesosoma. Width 156 and length 287. Pronotum with raised transverse to isodiametric reticulate sculpture, with 3 long setae near posterior margin and 2 short setae towards anterior margin. Propleuron faintly, longitudinally reticulate, with 1 seta medially and 1 seta laterally about midway between anterior and posterior apices. Prosternum apparently smooth, with 1 seta submedially almost at anterior margin. Mesoscutum with sculpture isodiametric anteriorly and on lateral lobes to longitudinally reticulate posteriorly on midlobe, with 1 setae along inner margin midway between anterior and posterior apices of notaulus, and 1 setae at lateral angle of lateral lobe. Anterior scutellum smooth, with 1 setae laterally at dorsal margin of axillula, and with campaniform sensilla about 2 × their diameter from transscutal articulation and about 7 × their diameter from each other; fenestra small, transversely oval and posterior to campaniform sensilla; frenum with faint, longitudinal wrinkles. Axilla with isodiametric reticulations and with 1 seta dorsally on apparently smooth lateral panel; axillula smooth. Metanotum smooth with 1 short seta on anterior margin closer to lateral apex of lateral panel than to dorsellum and 2 minute seta on anterior margin at apex of lateral panel. Propodeum apparently smooth medially, with faint engraved longitudinal reticulations laterally, with 1 propodeal setae midway between spiracle and posterior margin. Wings. Fore wing length (n=1) 563, width 146, length/width 3.86, longest marginal setae 107; cubital line of setae extending halfway towards base of parastigma, about midway between level of proximal and distal macrochaetae. Hind wing length 542, width 26, longest marginal setae 104. Legs. Femora and tibiae of all legs at most with faint longitudinal reticulation. Protibia with about 14 short, thick pegs along its length. Metasoma. Petiole width 26, length 11. Gaster (Fig. 170 ) height 155, length 352, apparently without sculpture (Figs 162 , 163 ) and with 2 short setae on gt1 and 3-6 longer lateral and dorsal setae on remaining terga. Cercus with 4 setae, the first seta about 2 × as long as the remaining setae. Hypopygium about 0.35 × gaster length. Ovipositor 380 long, its exserted part (56) about 0.2 × entire sheath length, with 1 subapical seta.

Male. Colour. As in generic description. Head. Head width 192 (n=1). Wings. Fore wing length (n=1) 563, width 146, length/width, 3.88, longest marginal setae 107. Hind wing length 542, width 26, longest marginal setae 114. Antenna. Measurements (n=1): scape length/width 74/22, pedicel length/width 30/37, flagellar segment length: fl1 44, fl2 59, fl3 62, fl4 61, fl5 60, fl6 60, fl7 64, fl8 61, fl9 61, fl10 62, fl11 58; total flagellar length 652; fl6 length/width 2.73, with 4 mps (Fig. 172 ). Metasoma. Gaster (Fig. 175 ) apparently without sculpture, with setae dorsolaterally and laterally and a few minute spicules medially on gt4 and gt5. Genitalia (Figs 163 , 164 , 176 ) with curved aedeagal apodeme about 0.6 × as long as aedeagus; paramere thin, with 3 subapical and apical setae.

Etymology.

The species name, Proarescon similis , is Latin for similar, referring to the similarity of this species to the only other described species in Proarescon .

Figures

Figures 153 - 158. Proarescon similis. 153 male head, ventroanterior 154 female head and pronotum, posterodorsal 155 male lower face and prosternum 156 female antennae 157 female mesosoma, dorsal 158 male mesosoma, dorsolateral. Scale bar for 153, 154, 157, 158 = 50 μm; 155 = 20 μm; 156 = 100 μm.

Figures 159 - 164. Proarescon similis, male. 159 mesosoma, dorsal 160 base of wings + axilla, dorsal 161 fore wing, dorsal 162 mesosoma, laterodorsal 163 apex of gaster + genitalia, dorsolateral 164 apex of gaster + genitalia, ventral. Scale bar for 159 = 50 μm; 160, 163, 164 = 20 μm; 161 = 200 μm; 162 = 100 μm.

Figures 165 - 167. Proarescon similis, holotype. 165 head, dorsal 166 a antenna without scape, lateral 166 b antenna, dorsal 167 type slide. Scale bar = 100 μm.

Figures 168, 169. Proarescon similis, holotype. 168 metasoma, dorsal (inset: enlargment of central area of scutellum showing fenestra) 169 wings. Scale bar = 100 μm.

Figures 170 - 172. Proarescon similis. 170 holotype metasoma, lateral 171 male paratype head, anterior 172 male paratype antenna. Scale bar for 170, 172 = 200 μm; 171 = 100 μm.

Figures 173, 174. Proarescon similis, male paratype. 173 mesosoma, dorsal 174 wings. Scale bar = 100 μm.

Figures 175, 176. Proarescon similis, male paratype. 175 metasoma, dorsal 176 genitalia, dorsal (seen through body). Scale bar for 175 = 100 μm; 176 = 50 μm.