Cleruchus pmilb Triapitsyn, 2018

Manickavasagam, Sagadai, Triapitsyn, Serguei V. & Palanivel, Selvaraj, 2018, Five new species of Cleruchus from the Oriental region and report of Anaphes quinquearticulatus (Hymenoptera: Mymaridae) from India, Zootaxa 4387 (1), pp. 134-156 : 150-152

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Cleruchus pmilb Triapitsyn

sp. n.

Cleruchus pmilb Triapitsyn , sp. n.

( Figs 33–38 View FIGURE 33 View FIGURES 34–38 )

Description. FEMALE (holotype, Fig. 38 View FIGURES 34–38 ). Head dark brown; antenna, mesosoma and metasoma brownish; legs pale.

Eye normal; ocelli present. Antenna ( Fig. 34 View FIGURES 34–38 ) with scape almost smooth; scape minus radicle 3.8× as long as wide. Pedicel 1.65× as long as wide, longer than any funicular segment; all funicular segments a little longer than wide except fl1 as long as wide, fl6 the longest and widest funicular segment, all funicular segments without mps; clava slightly longer than combined length of fl3–fl6, 2.8× as long as wide, with 6 mps.

Mesosoma clearly shorter than strongly elongate gaster ( Fig.38 View FIGURES 34–38 ), almost smooth; propodeum about 1.4× as long as mesoscutum.

Macropterous. Fore wing ( Fig. 36 View FIGURES 34–38 ) 11.7× as long as wide; venation 0.35× as long as wing length; parastigma with both macrochaetae very short (15 µm) and inconspicuous, and stigmal vein with a longer seta; disc slightly infuscate, with a median row of setae in addition to an admarginal row of setae along anterior margin only (that along posterior margin absent); the longest marginal seta 3.6× greatest width of wing. Hind wing ( Fig. 37 View FIGURES 34–38 ) 23.8× as long as wide; disc almost hyaline, with a median row of setae in addition to a complete row of setae along anterior margin; longest marginal seta 6.5× greatest width of wing.

Petiole conspicuous, 3.6× as wide as long; ovipositor ( Fig. 38 View FIGURES 34–38 ) almost 0.6× length of metatibia and occupying about 0.15 length of gaster, slightly exserted beyond its apex (by 0.19× own length).

Measurements in µm (holotype, as length or length/width): Body, 818 (body length of the dry-mounted specimen prior to slide-mounting 640). Head, 115/156. Antenna: radicle, 12/8; rest of scape, 76/20; pedicel, 33/20; fl1, 15/15; fl2, 18/15; fl3, 20/17; fl4, 21/16; fl5, 21/15; fl6, 23/17; clava, 94/33. Fore wing, 515/44; longest marginal seta, 160. Hind wing, 500/21; longest marginal seta, 136. Mesosoma, 291/126; mesoscutum, 78/126; anterior scutellum, 51; frenum, 51; propodeum, 75. Petiole, 12/43; gaster, 407/103; ovipositor, 79. Metatibia, 136.

Variation (dry-mounted paratype, Fig. 33 View FIGURE 33 ): body length 640 µm.

MALE. Unknown.

Diagnosis. Females of C. pmilb are very similar to those of the European species C. leptosoma Debauche , to which they key in Triapitsyn (2014a), in having a strongly elongate body (particularly the gaster), antennal funicle segments without mps, and also in lacking a row of setae along the posterior margin of the fore wing disc. They differ from C. leptosoma in the following combination of characters: pedicel 1.65× as long as wide, fl6 clearly longer than wide, clava 2.8× as long as wide, and ovipositor almost 0.6× length of metatibia and occupying about 0.15 length of gaster (in C. leptosoma pedicel about 2.1× as long as wide, fl6 about as long as wide, clava about 3.4× as long as wide, and ovipositor 0.8–0.9× length of metatibia and occupying 0.27–0.3 length of gaster (Triapitsyn 2014a)). By itself, each of these morphological features is not too significantly different in C. pmilb from that in C. leptosoma , but their unique combination justifies description of this new species from Thailand, where occurrence of the European C. leptosoma would be highly unlikely.

It is also somewhat similar to C. orientalis but the macrochaetae are much shorter ( Figs 27 View FIGURES 27−29 , 36 View FIGURES 34–38 ).

Type material. Holotype female [ UCRC] on slide ( Fig. 35 View FIGURES 34–38 ) labeled: 1. “ THAILAND: Phetchaburi Kaeng Krachan National Park 12°49.243’N 99°22.256’E, 890 m, B. V. Brown, MT”; 2. (database label) “ Univ. Calif. Riverside Ent. Res. Museum UCRC ENT 306914 View Materials GoogleMaps ; 3. “ Mounted by V. V. Berezovskiy 2017 in Canada balsam”; 4. “ Det. by S. V. Triapitsyn 2017 ”; 5. (magenta) “ Cleruchus pmilb S. Triapitsyn HOLOTYPE ♀ ”. The holotype is complete, dissected under 3 coverslips . Paratype ( Fig. 33 View FIGURE 33 ): THAILAND: Phetchaburi, Kaeng Krachan National Park, Ban Krang , 12°47.896’N 99°27.196’E, 324 m,, B.V. Brown (1 ♀ on point, UCRC) GoogleMaps .

Distribution. Thailand.

Etymology. The species name is a noun in apposition and a meaningless combination of letters.


University of California, Riverside