Ampulicomorpha viator Mita & Olmi, 2017

Olmi, Massimo, 2017, Dryinidae and Embolemidae (Hymenoptera, Chrysidoidea) from Anijima, Ogasawara Islands, Japan, Zootaxa 4323 (2), pp. 239-249 : 245-247

Ampulicomorpha viator Mita & Olmi , new species

( FigS 11–16 )

Description. ♀. Macropterous. Body length 4.2 mm. Head brown, dorsally darker; antenna brown; maxillary and labial palpi brown. MeSoSoma dark brown eXcept prothoraX, tegula and legS pale brown; wingS faintly tinged with brown; veinS dark brown. MetaSoma dark brown. Antenna filiform, not thickened diStally; antennomereS in following proportionS: 8: 1.7: 3.5: 3.3: 3.2: 3.0: 3.0: 2.8: 2.5: 3.0. Head ( FigS 12, 13 ) faintly granulated, covered with denSely located minute Setae, 1.28 × longer than wide, 0.98 × longer than deep; dorSal margin and ventral margin weakly rounded in profile; occipital carina complete; ocelli arranged in acute triangle; OL = 1.0: POL = 0.7: OPL = 1.5; eye 0.26 × head length, 0.32 × head height; palpal formula 5/2. Pronotum 0.5 × longer than wide, 0.8 × longer than meSoScutum, granulated, forming rounded corner in lateral view ( Fig. 12 ); median longitudinal furrow complete ( Fig. 15 ); lateral Surface poStero-medially with a row of Shallow foveae. MeSoScutum and meSoScutellum granulated, covered with minute Setae aS head; notauluS abSent. MeSopleuron faintly granulated, covered with denSely located minute Setae; Scrobal SulcuS indicated by Sharp continuouS groove. Metanotum poliShed with Several indiStinct Small punctureS. Metapectal-propodeal compleX ( Fig. 15 ) reticulate rugoSe; metapoStnotum with pair of irregular median longitudinal keelS and median keel, baSal median trapezoidal area and lateral poliShed area; firSt abdominal tergum reticulate rugoSe, with pair of indiStinct longitudinal keelS. Forewing broadly darkened, with 1 SDC cell cloSed ( Fig. 14 ); marginal cell open. Profemur Stout ( Fig. 16 ), 2.1 × longer than wide; protibia 3.6 × longer than wide; length (width) of protarSomereS in following proportionS: 4.0 (1.0): 1.3 (0.8): 1.0 (0.7): 1.0 (0.7): 2.0 (0.5). Metatibia 7.3 × longer than wide; outer Spur Short and Stout, approXimately 0.5 × of inner Spur; length (width) of metatarSomereS in following proportionS: 8.0 (1.0); 3.6 (0.7); 2.5 (0.7); 2.2 (0.7); 3.3 (0.5).

Male. Unknown.

Specimen examined. Holotype ♀: “[ Japan] Tokyo OgaSawara IS. Anijima I., InuiSawa, 5.VI–2.VII.2014, JWRC leg. (MT)”, “JWRC-OGA, INS-0186” (ELKU).

Etymology. The SpecieS name “ viator ” referS the long-diStance diSperSal to OgaSawara ISlandS.

Hosts. Unknown.

Distribution. Japan (Anijima, OgaSawara ISlandS).

Remarks. Among macropterouS femaleS of world Embolemidae , Ampulicomorpha viator iS cloSely related to A. nepalensis Olmi, 1997 and A. reticulata (van Achterberg, in van Achterberg & van KatS, 2000) but it iS Separated by diStinct median longitudinal keel on metapectal-propodeal compleX (median keel abSent in A. nepalensis ( Fig. 17 )); the larger eye (diStance between toruli and eye iS 0.58 × eye length in A. viator ( FigS 11, 12 ), 0.75 × in A. reticulata ( Fig. 18 )); abSence of notauluS (Short notauluS preSent in A. reticulata ); Stout profemur (2.1 × longer than wide in A. viator , 2.5 × in A. reticulata ); and Smooth Scrobal SulcuS (crenulate in A. reticulata and A. nepalensis ). In the key to the femaleS of the Oriental Ampulicomorpha (Xu et al. 2012) , A. viator can be inSerted aS followS:

3. Dorsal surface of metapectal-propodeal complex with two fading median longitudinal keels........... A. taiwanensis Olmi - Dorsal surface of metapectal-propodeal complex with 2–3 distinct median longitudinal keels.......................... 4 4. Dorsal surface of metapectal-propodeal complex with square basal area near anterior margin...........................

....................................................................... A. sinensis Xu, Olmi & Guglielmino - Dorsal surface of metapectal-propodeal complex with trapezoid basal area near anterior margin ( Fig. 1 in Olmi 1997)..... 5 5. Dorsal surface of metapectal-propodeal complex with two median longitudinal keels; forewing hyaline, not darkened.......

...................................................................................... A. nepalensis Olmi - Dorsal surface of metapectal-propodeal complex with three median longitudinal keels ( Fig. 15 ); forewing broadly darkened

( Fig. 14 )............................................................................... A. viator sp. nov.

PreviouSly, no embolemid haS been found from oceanic iSland. Probably thiS iS becauSe their hoStS live in cryptic habitat; i.e., pore Space in Soil, caveS or under bark of rotten woodS ( Guglielmino & Bückle 2013; VaS & KutaSi 2016). Adult embolemidS are alSo recorded from thoSe Subterranean environmentS (van Achterberg & van KatS 2000; Olmi et al. 2014; Varrone & Olmi 2010). The cloSeSt locality of Embolemidae from Anijima iS Hachijojima, which iS located ca. 700 km north ( Fig. 1) (Olmi et al. 2014). AS Ampulicomorpha iS macropterouS, SpontaneouS diSperSal could occur, however, it Should be quite difficult for them to Settle in the Small pacific iSland becauSe of the lack or limited hoSt reSourceS. They are conSidered to be paraSitoidS of Achilidae ( Guglielmino & Bückle 2013) , but none of theSe hoStS haS been found till now in JapaneSe oceanic iSlandS.

Figures

FIGURE 17. MESoSomA of Ampulicomorpha nepalensis Olmi, HolotYpE ♀ (CoURtESY of CNC).

FIGURE 18. HEAd ANd mESoSomA of Ampulicomorpha reticulata (VAN ACHtERbERg), HolotYpE ♀ (CoURtESY of RMNH).

FIGURES 11 – 16. HolotYpE ♀ of Ampulicomorpha viator, sp. nov. 11. LAtERAl HAbitUS; 12. HEAd, lAtERAl ViEW; 13. HEAd, doRSAl ViEW; 14. FoREWiNg; 15. MESoSomA, doRSAl ViEW; 16. PRofEmUR. BARS = 1.0 mm foR 11; 0.5 mm foR 12 – 16.