Syspasis TOWNES 1965
Creators: name: Riedel, Matthias
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Syspasis

description: Key for the Palaearctic species of Syspasis TOWNES   
(modified after RASNITSYN & SIYTAN 1981)  
Females:  
1 Mesosoma entirely black (figs 34, 36, 39). Metasoma ± red...............................................2  
- Mesosoma with ivory stripes (figs 35, 37, 38)....................................................................4  
 2 Area basalis without distinct median tubercle (fig. 36). Scutellum not carinate. Apical tergites black. Hind femur mainly black. Hind tibia with 2 external denticular spurs. Flagellum with 28-30 flagellomeres. Palaearctis................  S. haesitator (WESMAEL, 1845)    
- Area basalis with strong median tubercle (fig. 41). Scutellum ± carinate laterally (fig. 41). Hind tibia with multiple external denticular spurs. Hind femur red. Flagellum with at least 32 flagellomeres......................................................................................................3  
 3 Mid and hind tibiae mainly black. Flagellum with 37 flagellomeres. Hind femur slender, 4.4× longer than wide. Malar space 1.1× as long as width of mandibular base (fig. 8). Areolet quadrilateral: veins 2rs-m and 3rs-m meeting frontally. Kyrgyzstan....................................................................................................................  S. nigrotibialis nov.sp.    
 - Mid and hind tibiae mainly red. Flagellum with 32-33 flagellomeres. Hind femur stout, 3.8-4.2× longer than wide. Malar space 0.9-1.0× as long as width of mandibular base. Areolet ± pentagonal: frontal distance between veins 2rs-m and 3rs-m 2× their width. Middle Asia.......................................................................................  S. nigrithorax nov.sp.    
 4 Metasoma entirely red OR at least 2 nd to 4 th tergites red. Prescutellar carina usually ivory. Outer orbit with long ivory stripe. Pterostigma dark. Mesoscutum sometimes with two paramedian ivory stripes. Body length 10-12 mm................................................5   
- Metasoma usually mainly black, at most basal tergites reddish. Prescutellar carina black. Outer orbit often without long ivory stripes.............................................................7  
 5 Apical margin of clypeus with small median tooth (fig. 15). Hypostomal carina lamelliform elevated; genal carina ± obsolete ventrally (fig. 15). Hind coxa without scopa. West Palaearctis. ...........................................  S. leucolomia (GRAVENHORST, 1829)    
- Apical margin of clypeus without median tooth. Hypostomal carina narrow; genal carina complete ventrally, reaching hypostomal carina.......................................................6  
 6 Apical tergites red. Temple strongly narrowed behind eye (fig. 25). Palaearctis.............................................................................................................  S. carinator (FABRICIUS, 1798)    
 - 5 th to 7 th tergites black. Temples shortly parallel behind eye, moderately narrowed apically (fig. 29). Siberia................................................................  S. nigroapicalis nov.sp.    
 7 Thyridium about as wide as the interval between thyridia (fig. 48). Usually hind edge of scutellum and flagellar ring, sometimes postpetiolus and 3 rd to 5 th tergites apically with ivory spots. Temple strongly narrowed behind eye (fig. 24). Pterostigma brown, paler centrally. Mesoscutum densely punctate and granulate, dull. 1 st flagellomere 2.7- 2.8× longer than wide. Body length 10-15 mm. Palaearctis....................................................................................................................................  S. albiguttata (GRAVENHORST, 1820)    
- Thyridium much wider than the interval between thyridia (fig. 49). Metasoma without ivory spots...........................................................................................................................8  
8 Mesosoma including scutellum completely black (figs 42, 43). Flagellum with at most 36 flagellomeres..................................................................................................................9  
- Side of scutellum ± ivory (figs 38, 44). Flagellum with at least 34 flagellomeres............11  
 9 2 nd and 3 rd tergites superficially punctate, at most narrowly (less than 0.5× tergal width) and finely striate medially, black (fig. 57). Hind coxa without scopa. Body length 10 mm. Palaearctis..........................................................  S. puerulus (KRIECHBAUMER, 1890)    
 - 2 nd and 3 rd tergites widely (more than 0.5× of tergal width) with distinct longitudinal striae or rugae, usually ± red (figs 56, 60). Hind coxa with or without scopa...................10   
 10 Hind coxa with scopa. 1 st flagellomere 3.0× longer than wide. Temple distinctly and linearly narrowed behind eye. Frontal orbit without ivory stripe. Metasoma entirely black OR 1 st to 3 rd tergites ± reddish. Body length 9-11 mm. West Palaearctis and Kazakhstan.......................................................................  S. optica (GRAVENHORST, 1829)    
 - Hind coxa without distinct scopa. 1 st flagellomere 2.0× longer than wide. Temple slightly and roundly narrowed behind eye. Frontal orbit with ivory stripe. Postpetiolus and 2 nd to 3 rd tergites red. Body length 11 mm. North China..................  S. sinensis nov.sp.    
 11 Pterostigma, femora and tibiae red. Temple wide, slightly narrowed apically. Outer orbit black. Flagellum with 35-38 flagellomeres, 1 st flagellomere long, 3.3-3.8× longer than wide. Basal tergites sometimes ± reddish. Body length 10-14 mm. Palaearctis..............................................................................................  S. scutellator (GRAVENHORST, 1829)    
- Pterostigma and often legs ± brown or black. Temple narrower, usually ± narrowed behind eye.........................................................................................................................12  
 12 1 st flagellomere 2.5-2.8× longer than wide. Hind coxa with distinct scopa. Hind femur stout, 3.4-3.8× longer than wide. Inner orbit with small ivory spot opposite antennal groove. Hind edge or upper margin of pronotum yellowish. Body length 9-13 mm. Holarctis...................................................................................  S. tauma (HEINRICH, 1951)    
 - 1 st flagellomere 2.9-3.5× longer than wide. Hind coxa with weak and indistinct scopa. Hind femur slenderer, 3.9-4.3× longer than wide. Frontal orbit with ivory stripe. Pronotum without ivory spots. Body length 12-15 mm. Palaearctis....................................................................................................................................  S. lineator (FABRICIUS, 1781)
description: Published as part of Riedel, Matthias, 2021, Revision of the Palaearctic species of Syspasis TOWNES, 1965 (Hymenoptera, Ichneumonidae, Ichneumoninae), pp. 775-810 in Linzer biologische Beiträge 53 (2) on pages 777-778, DOI: 10.5281/zenodo.13154748