Microchelonus acutulus, Papp, Jenő, 2016

Papp, Jenő, 2016, First Survey Of The Neotropical Species Of Microchelonus Szépligeti With Descriptions Of Twenty-Five New Species (Hymenoptera: Braconidae: Cheloninae), Acta Zoologica Academiae Scientiarum Hungaricae 62 (3), pp. 217-344 : 222-224

Microchelonus acutulus sp. n.

(Figs 1–9)

Materialexamined – Femaleholotype: CostaRica , Guanacaste, 3 kmSEfromriverNa- vanjo, May 1992, leg. F. D. Parker. – Holotypeisinfairlygoodcondition: (1) glueddirectto thepinbyitsrightpro-andmesopleuron; (2) missing: middlepairoflegs, rightflagellom- eres 4–14, tarsomeres 4–5 ofrighthindleg. Typedepository: HNHM, Hym. Typ. No. 12226 .

Etymology – Thespeciesname “acutulus” referstotheacuteposteriorendofthe carapace (Fig. 7).

Description of the female holotype – Body 3.3 mm long. Antenna (left one) short: as long asheadandmesosomacombinedandwith 16 antennomeres. Scape 2.5 timesaslongas wide, firstflagellomerethreetimesaslongasbroadapically, furtherflagellomeresshorten- ingsothatflagellomeres 10–13 cubic; flagellomeresproximo-distallyattenuating. – Head indorsalviewtransverse (Fig. 1), clearlytwiceasbroadaslong, eye 2.2 timeslongerthan temple, templereceded. OOLsomewhatlonger (12: 10) thanPOL. Eyeinlateralview 1.8 timesashighaswide, genabeyondeyeweaklybroadeningventrally: 0.6 timesaswideas eye (Fig. 2 seearrows). Genasubstriolated. Clypeus 1.7 timesaswidebelowashighmedi- ally, itslowermarginfaintlyconvex (cf. Fig. 36 ). Face 1.7 timesaswideashigh. Clypeus withconfluentpunctation, shiny. Facerugulo-rugose (Fig. 3). Vertexandocciputdensely substriolated (Fig. 1).

Mesosomainlateralview 1.6 timesaslongashigh. Mesosomascabrous, scutellum rugose. Transversecarinaofpropodeumwithfourdenticules (Fig. 5). Hindfemurthicken- Figs 1–16. 1–9. Microchelonusacutulus sp. n. (femaleholotype): 1 = headindorsalviewwith indicationofitssculpture, 2 = headinlateralview, 3 = righthalfofheadinfrontalview withindicationofitssculpture, 4 = hindfemur, 5 = propodealcarinaindorsalview, 6 = distalpartofrightforewing, 7 = carapaceindorsalviewwithindicationofitssculpture, 8 = carapaceinlateralview, 9 = posteriorhalfofcarapaceinventralview. 10–16. Microchelonus amelot sp. n. (femaleholotype): 10 = headindorsalviewwithindicationofitssculpture, 11 = clypeus, 12 = headinlateralviewwithindicationofitssculpture, 13 = scutellum, 14 =

propodealcarinaindorsalview, 15 = hindfemur, 16 = distalpartofrightforewing.

ing, 2.6 timesaslongasbroadmedially (Fig. 4). Hindbasitarsusaslongastarsomeres 2–4 combined.

Forewingshorterthanbody (2.5 mmlong). Pterostigma 2.5 timesaslongaswide andissuing r fromitsmiddle; 3–SR 1.6 timeslongerthan r, SR1 almoststraight, 1–R1 almost, 0.87 times, aslongaspterostigma (Fig. 6 seearrows).

Carapaceindorsalviewfeeblybroadeningposteriorly, 2.8 timesaslongasbroad, carapaceapicallyacute, itsanteriortwo-thirdsstriate, interstriationssubcrenulate (Fig. 7). Carapaceinlateralview 4.3 timesaslongashighposteriorly, apicallypointeddorsally (Fig. 8). Carapaceapico-ventrallydeeplyincurved: incurvedpartaslongashindtarsomer- es 1–3 combined (Fig. 9). Ovipositorsheathshort, concealed (Fig. 8).

Groundcolourofbodyblack. Scapeandpedicelochreyellow, flagellumblackish. Tegulabrownishblack. Legstestaceous, hindtibiaproximallyandhindbasitarsusstraw yellow, distalendofhindtibiabrownish. Wingshyaline, pterostigmabrown, veinsyellow to light brown.

Maleandhostunknown.

Distribution – Costa Rica.

Taxonomic position – The new species, M. acutulus , is close to M. cacumenus Pappand M. parkeri Papp , thethreespeciesaredistinguishedinthekeyto thefemalescouplets 18(19) – 21(20).

Figures

Figs 32–45. 32–34. Microchelonus aperon sp. n. (f, holotype): 32 = distal part of right fore wing, 33 = carapaceindorsalviewwithindicationofitssculpture, 34 = carapaceinlateral view. 35–44. Microchelonusavron sp. n. (m, holotype): 35 = headindorsalviewwithindica- tionofitssculpture, 36 = clypeus, 37 = headinlateralviewwithindicationofitssculpture, 38 = propodealcarinaindorsalview, 39 = hindfemur + tibia, 40 = distalpartofrightfore wing, 41 = carapaceindorsalviewwithindicationofitssculpture, 42 = carapaceinlateral view, 43 = apicalforamenofcarapace, 44 = posteriorthirdofcarapaceinventralview. 45. Microchelonusbermus sp. n. (m, holotype): 45 = capaceinlateralview.