Paramesius Chemyreva & Kolyada, 2018, sp. nov.
Creators: name: Chemyreva, Vasilisa G.
name: Kolyada, Victor A.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Diapriidae
Paramesius

description: 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.
5. Notauli absent anteriorly to almost full but with not sharp lateral margin anteriorly (Figs 25 arrow, 26); pronotal cervical area
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)
description: Published as part of 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, pp. 453-472 in Zootaxa 4524 (4) on pages 454-455, DOI: 10.11646/zootaxa.4524.4.3, http://zenodo.org/record/2610662