Paramesius spiracularis, Chemyreva & Kolyada, 2018

Chemyreva, Vasilisa G. & Kolyada, Victor A., 2018, Review of the genus Paramesius Westwood, 1832 (Hymenoptera: Diapriidae, Spilomicrini) from Russia, with description of four new species, Zootaxa 4524 (4), pp. 453-472 : 454-455

Key to Paramesius species of the Palaearctic Region

Female

1. Pleurostoma with sharp blade throughout (Fig. 4 arrows); pronotal cervical area densely pubescent; neck pubescent (Figs 2, 4); wings brachypterous to reaching apex of metasoma or sometimes longer......................................... 2

- Pleurostoma only with semicircular blade anteriorly near base of mandibula (Fig. 24 arrow); pronotal cervical area sparsely pubescent; neck bare or with a few short setae near pronotum ( Figs 13 , 15, 17, 19, 22, 26); wings always reaching apex of metasoma or distinctly longer.......................................................................... 3

2. Petiole ventrally without dense woolly pubescence (Fig. 5); propodeum with posterior margin in dorsal view deeply arcuate (Fig. 3)............................................................................ P. belytoides Marshall

- Petiole ventrally with dense woolly pubescence (Fig. 6); propodeum with posterior margin in dorsal view weakly arcuate (Fig. 1)............................................................................. P. brachypterus Thomson

3. Mesopleuron ventrally with reticulation ( Fig. 27 ); propodealal spiracles large, its height only 4.0 times shorter than length of propodeum in lateral view ( Figs 28, 29 ).................................................. P. spiracularis sp. nov.

- Mesopleuron ventrally without reticulation; propodeal spiracles small, its height 7.0 times shorter than length of propodeum in lateral view ( Figs 10, 12 )................................................................................ 4

4. A 12 in dorsal view elongate ( Fig. 36 ), if sometimes A12 subquadrate than notauli shallow anteriorly (Figs 25 arrow, 26)... 5

- A 12 in dorsal view transverse or subquadrate ( Figs 37, 42 ), notauli complete and deep throughout..................... 6 with a few solely long setae (Fig. 26)................................................. P. rufipes (Fonscolombe) - Notauli deep anteriorly with sharp margin throughout (Figs 14, 16, 22, 23); pronotal cervical area with numerous short and long setae (Figs 15, 17).................................................................. P. primorus sp. nov.

6. Pronotal cervical area with two lines of short furrows (Fig. 19); anterior scutellar pit weakly transverse, 1.7–1.6 times wider than its length, with one keel (Fig. 18).................................................... P. janmaceki sp. nov.

- Pronotal cervical area without furrows (Fig. 15, 22, 26); anterior scutellar pit strongly transverse, 2.2–2.8 times wider its length, with tow–four keels (Fig. 14)..................................................................... 7

7. A13 shorter to as long as A12 and A11 together ( Figs 37, 39 ); mesoscutal suprahumeral sulcus absent, if present than shallow and smooth at bottom ( Fig. 13 )........................................................ P. crassicornis Thomson

- A13 1.15–1.38 times longer than A12 and A11 together ( Fig. 33 ); mesoscutal suprahumeral sulcus full and deeply sculptured at bottom (Fig. 22)................................................................... P. ocampus sp. nov.

Male

1. Pleurostoma with sharp blade throughout (Fig. 4); pronotal cervical area densely pubescent; neck densely pubescent (Figs 2, 4).................................................................................................... 2

- Pleurostoma with semicircular blade anteriorly near base of mandibula (Fig. 24); pronotal cervical area poorly pubescent; neck bare or with a few short setae near pronotum ( Figs 13 , 15, 17, 19, 22, 26)......................................... 3

2. Ventral surface of petiole without wooly pubescence (Fig. 5); propodeum with posterior margin in dorsal view deeply arcuate (Fig. 3); keel on A4 extending from base to one third of segment length......................... P. belytoides Marshall

- Ventral surface of petiole with wooly pubescence (Fig. 6); propodeum with posterior margin in dorsal view weakly arcuate (Fig. 1); keel on A4 extending from base to half of segment length......................... P. brachypterus Thomson

3. Mesopleuron ventrally with reticulation and with keel extending from anterior to median coxae ( Fig. 27 ); propodeal spiracles large, its height 5.0 times shorter than propodeal length in lateral view ( Fig. 31 ).................. P. spiracularis sp. nov.

- Mesopleuron ventrally without reticulation or without keel; propodeal spiracles small, its height 8.0 times shorter than propodeal length in lateral view ( Fig. 12 )...................................................................... 4

4. Pronotal cervical area high with two lines of short furrow (Fig. 19).............................. P. janmaceki sp. nov.

- Pronotalcervicalarealowandsmooth(Figs13,22,26)........................ 5

5. Petiole 0.53–0.59 times as long as T2 length............................................. P. crassicornis Thomson

- Petiole 0.37–0.50 times as long as T2 length................................................................ 6

6. A4 with keel extending to 0.55–0.60 of its length (Figs 46, 51); mesoscutal suprahumeral sulcus complete and deeply sculptured at bottom (Fig. 22)............................................................. P. ocampus sp. nov.

- A4 with keel extending to 0.36–0.53 of its length (Figs 43, 47, 48, 52); mesoscutal suprahumeral sulcus shallow near notauli to absent (Figs 16, 26)................................................................................... 7

7. Occipital flange foveolate ( Fig. 11 ); pronotal cervical area with numerous short and long setae (Figs 15, 17); notauli deep, anteriorly with sharp lateral margin (Fig. 16)................................................ P. primorus sp. nov.

- Occipital flange smooth; pronotal cervical area with a few solely long setae (Fig. 26); notauli shallow anteriorly or almost full but with not sharp lateral margin anteriorly (Figs 25 arrow, 26)............................. P. rufipes (Fonscolombe)

Figures

FIGURES 8–13. P. dolosus, lectotype, ♀ (8), P. crassicornis (9–10, 12–13) and P. primorus sp. nov. (11). 9, 11, head of male, dorsal view; 10, mesosoma and petiole of female, dorsal view; 12, 13, mesosoma of female, lateral view. Scale bar: 200 µm (9–12); 500 µm (13); 1.0 mm (8).

FIGURES 27–31. P. spiracularis sp. nov. ♀ (27–30) and ♂ (31). 27, mesosoma, ventral view; 28, mesosoma, lateral view; 29, mesosoma, dorsal view; 30, mesosoma, frontal view; 31, head, mesosoma and petiole, lateral view. Scale bar 200 µm.

FIGURES 32–42. 32, Apexes of female antennae in lateral (32–35, 38–41) and dorsal (36, 37, 42) views. 32, P. brachypterus; 33, P. ocampus sp. nov.; 34, 36, P. primorus sp. nov.; 35, P. belytoides; 37, 39, P. crassicornis; 38, P. rufipes; 40, 42, P. janmaceki sp. nov.; 41, P. spiracularis sp. nov. Scale bar 100 µm.