Microchelonus latistigma, 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 : 272-274

Microchelonus latistigma sp. n.

(Figs 289–298)

Materialexamined – Femaleholotype: CostaRica , Alajuela, 20 kmSfromUpala, 10 – 19 March 1991, leg. F. D. Parker. – Holotypeisingoodcondition: (1) glueddirecttothepin bytherightsideofmesosoma, (2) rightforelegsomewhatlessvisibleowingtothegluing. Holotype is deposited in HNHM, Hym. Typ. No. 12239.

Etymology – Thespeciesreceivedthename “latistigma”, referingtoitswidepterostigma (Fig. 296).

Description of the female holotype – Body 2.6 mm long. Antenna almost as long as body (2.4 mmlong) andwith 16 antennomeres. Scapesomewhatbelly: thriceaslongasbroad proximally (Fig. 289). Firstflagellomerelong, seventimesaslongasbroad, furtherflagellomeresshorteningsothatpenultimateflagellomere 1.25 timesaslongasbroad. – Head indorsalviewtransverse, 2.1 timesasbroadaslong, eye 2.5 timeslongerthantemple, templereceded (Fig. 290). OOLslightlylongerthanPOL (10:9). Eyeinlateralview 1.9 timesashighaswide, genabeyondeyefaintlybroadeningventrally, lesswidethaneye, genapolishedwithveryfineanddispersesubstriolae (Fig. 291). Clypeus 1.5 timesaswide belowashighmedially, itslowermargintruncate (Fig. 292). Faceandclypeuscoriaceoussubrugulose, subshiny, sculptureofclypeusslightlyweaker. Headabovedenselysubrugulose, subshiny (Fig. 290).

Mesosomainlateralviewstout, slightly (1.1 times) longerthanhigh, scabrous-rugose. Scutellumdenselyrugo-rugulose (cf. Fig. 412). Transversecarinaofpropodeumless strong, withfoursmalldenticules (Fig. 293). Hindfemur 3.5 timesaslongasbroadmedi- ally (Fig. 294). Hindtibiathickening, distallyasbroadasfemur (cf. Fig. 165). Hindbasi- tarsusaslongastarsomeres 2–3 combined. Pairofspursofhindtibiasubequal (Fig. 295).

Forewingone- sixthshorterthanbody (2.2 mmlong). Pterostigmawide, 2.2 timesas long as wide and issuing r just distally from its middle, r slightly longer than 3–SR (6:5), SR1 faintlybent, 1–R1 short: 0.7 timesaslongaspterostigma (Fig 296).

Carapaceindorsalviewglobose, 1.6 timesaslongasbroadslightlyposteriorlyfrom itsmiddle, anteriorlystriatedwithlittleanastomoses, posteriorlydenselyrugulose, apically (i.e. declivouspart) polished. Carapaceinlateralview 2.9 timesaslongashighposte- riorly, itshindenddeclivous (Fig. 298). Carapaceapico-ventrallysomewhatincurved (cf. Fig. 262). Ovipositorsheathshort, concealed.

Groundcolourofbodyblack.Scapeandpedicelyellow. Flagellumdarkbrowntoblackish, flagellomeres 3–4 strawyellow. Palpidarkbrownish. Tegulaandforehalfofcarapace yellow. Legsbrowntodarkbrown, withstrawyellowtoyellowpattern (coxae, trochanters, tibiae). Wingssubhyaline, pterostigmabrown, veinsyellowtobrownish, lightbrown.

Maleandhostunknown.

Distribution – Costa Rica.

Taxonomic position – The new species, Microchelonus latistigma , is closest to M. candidus sp. n. and M. exceptus sp. n., see the couplets of the key to the female Microchelonus species 4 (3) – 8 (9).

Thenewspeciesisalsonearto M. fulgenssp . n. consideringtheircommonfeatures: strawyellowringofflagellumandtempleindorsalviewre- ceded (Figs 102, 290), thedistinctionbetweenthemisasfollows:

Figs 285–300. 285–288. Microchelonus lavernae (Ashmead, 1889) (f): 285 = head in dorsal viewwithindicationofitssculpture, 286 = distalpartofrightforewing, 287 = carapacein lateralview, 288 = hindfemur. 289–298. Microchelonuslatistigma sp. n. (f, holotype): 289 = scapeandpedicelinlateralview, 290 = headindorsalviewwithindicationofitssculpture, 291 = headinlateralviewwithindicationofitssculpture, 292 = clypeus, 293 = propodeal carinaindorsalview, 294 = hindfemur, 295 = pairofspursofhindtibia, 296 = distalpart ofrightforewing, 297 = carapaceindorsalviewwithindicationofitssculpture, 298 = carapaceinlateralview. 299–300. Microchelonuslevigena sp. n. (f, holotype): 299 = clypeus,

300 = hindfemur.

1 (2) Forewing: pterostigmawide, 2.2 timesaslongaswide, 1–R1 0.7 timesas longaspterostigma (Fig. 296). Carapaceindorsalviewglobose, 1.6 times aslongasbroadjustposteriorly (Fig. 297). Carapaceinlateralview 2.9 timesaslongashighposteriorly, itshindendslightlylessdeclivous (Fig. 298 seearrows). Hindfemur 3.5 timesaslongasbroad (Fig. 294). Ventral partofclypeussomewhatmoreproduced (Fig. 292). Tegulayellow. f: 2.6 mm. – Costa Rica M. latistigma sp. n.

1 (1) Forewing: pterostigmalesswide, 2.3 timesaslongaswide, 1–R1 0.6 timesaslongaspterostigma (Fig. 231). Carapaceindorsalviewlessglobose, twiceaslongasbroadposteriorly (Fig. 232). Carapaceinlateral view 3.4 timesaslongashighposteriorly, itshindendslightlymorede- clivous (Fig. 233 seearrows). Hindfemur 4.1 timesaslongasbroad (Fig. 229). Ventralpartofclypeussomewhatlessproduced (Fig. 228). Tegula black. f: 3.1 mm. – Costa Rica M. fulgens sp. n.

Furthermore, thenewspeciesisrelatedto M. tuberulussp . n. viewing theircommonfeatures: widepterostigma (Figs 296, 465), recededtemple (Figs 290, 460), penultimateflagellomere 1.2 timeslongerthanbroad (Fig. 459), legs yellow; thetwospeciesaredistinguishedat M. tuberulus . Inthekeytothe female Microchelonus species M. latistigma runsto M. candidus sp. n., seecouplets 4 (3) – 6 (5).