Marshiella Shaw, 1985

Amat, Zibaidam, Achterberg, Cornelis Van, Zhao, Guo-Shuai, Fang, Yu, Tang, Pu & Li, Qin, 2025, Unveiling a new taxon belonging to Marshiella Shaw (Hymenoptera: Braconidae), Zootaxa 5679 (1), pp. 143-147 : 146

Key to Marshiella Shaw (females)

1 Fifth flagellomere in ventral view heart-shaped emarginated apically, in dorsal view strongly flattened and nearly twice wider than sixth flagellomere [New World]...................................................................... 2

- Fifth flagellomere cylindrical and in ventral view truncate apically, in dorsal view slender and slightly wider than sixth flagellomere......................................................................................... 3

2 First metasomal tergite entirely smooth beyond level of spiracles; area between posterior ocellus and eye pale yellowish white............................................................................. M. marshi Marsh, 2000

- First metasomal tergite finely rugulose beyond level of spiracles; area between posterior ocellus and eye partly dark brown or black.............................................................................. M. bobella Shaw, 2000

3 Second–fourth flagellomeres in dorsal view strongly widened and about twice wider than 8 th –10 th flagellomeres; dorso-lateral areas of propodeum smooth and polished [New World]....................................................... 4

- Second-fourth flagellomeres in dorsal view slightly widened and at most slightly wider than 8 th –10 th flagellomeres; dorso-lateral areas of propodeum smooth and polished [mainly Old World]............................................. 5

4 Antennal segments about 17; mesosoma reddish brown; second and third flagellomeres with straight setae; body length less than 2.0 mm....................................................... M. pulvillicornis ( Walley & MacKay, 1963)

- Antennal segments 19–21; mesosoma black; second and third flagellomeres with curved setae; body length more than 2 mm................................................................................ M. lettermani Shaw, 2000

5 Vein r emitted distinctly beyond middle of pterostigma; third and fourth flagellomeres slender ( Fig. 1 A–C ).............................................................................................. M. baichengensis sp. nov.

- Vein r emitted near middle of pterostigma or slightly beyond middle; third and fourth flagellomeres robust.............. 6

6 First flagellomere 1.5–2.0 × length of second flagellomere; antennomeres 19–21................................... 7

- First flagellomere 1.1–1.3 × length of second flagellomere (unknown in M. plumicornis ); antennomeres 17–21........... 9

7 Fourth flagellomere in ventral view emarginate apically; length of malar space equal to basal width of mandible; metasoma (except first tergite) black...................................................... M. homala Shamim et al., 2004

- Fourth flagellomere in ventral view truncate apically; length of malar space 0.6–0.7 × basal width of mandible; metasoma yellowish brown or pale reddish brown.................................................................... 8

8 First and second flagellomeres shallowly emarginated in ventral view, not more than 0.3 × length of flagellomere [ Japan]........................................................................... M. aichiensis Belokobylskij, 2000

- First and second flagellomeres deeply emarginated in ventral view, up to 0.5 × length of flagellomere [ China]............................................................................................ M. yifangia Li et al., 2021

9 Ovipositor sheath about half as long as metasoma; body black but head partly dark reddish brown [Europe, Nearctic]................................................................................... M. plumicornis ( Ruthe, 1856)

- Ovipositor sheath distinctly longer than metasoma; body brownish yellow or reddish brown [ China].................. 10

10 Fifth flagellomere much smaller than sixth flagellomere; first flagellomere about 1.3 × length of second flagellomere; antennomeres about 19................................................ M. binarius Chen & van Achterberg, 1997

- Fifth flagellomere similar to sixth flagellomere; first flagellomere about 1.1 × length of second flagellomere; antennomeres about 21........................................................... M. sinensis Chen & van Achterberg, 1997

Figures

FIGURE 1. Marshiella baichengensis sp. nov. ♀, A, antenna, ventral aspect; B, basal half of antenna, ventral aspect; C, six basal antennomeres, ventral aspect.