Distictus Townes, 1966

Supeleto, Fernanda A., Santos, Bernardo F. & Aguiar, Alexandre P., 2019, Revision of Distictus Townes, 1966 (Hymenoptera, Ichneumonidae, Cryptinae), with descriptions of ten new species, European Journal of Taxonomy 542, pp. 1-64 : 9-11

Keys to species of Distictus Townes, 1966

Females

1. Metasoma mostly orange (RGB 226,93,5), reddish (200,52,5) or reddish-brown (175,53,8), T2–8 mostly without posterior yellow stripes ( Figs 7D , 9C , 14E ), at most T2–3 with incomplete stripe ( Fig. 6D ) .................................................................................................................................. 2

– Metasoma black (23,5,2) or dark brown (31,11,2), at least T2–3 with posterior yellow stripes ( Figs 4C , 10D , 11C ) .......................................................................................................................... 9

2. Supra-clypeal area entirely pale yellow ( Fig. 13A, C ), rarely with blackish marks ( Fig. 15 A–B); orbital band on malar space complete, rarely ventrally briefly interrupted ( Fig. 15 A–B) ............... 3

– Supra-clypeal area with blackish or reddish-brown marks ( Figs 7A , 9A ); orbital band on malar space interrupted ......................................................................................................................................... 4

3. Metapleuron entirely black ( Fig. 15C ); mesosternum entirely black; fore and mid coxae pale yellow, without dorso-apical brown spot ( Fig. 15G ); central yellow mark on mesopleurum extending to sternaulus ( Fig. 15G ); posterior area of propodeum rugulose ( Fig. 15F ); anterior margin of propodeum medially distinctly concave ( Fig. 15F ) .......................... Distictus tibialis ( Brullé, 1846)

– Metapleuron with distict yellow mark ( Fig. 13D ); mesosternum with large yellow marks; fore and mid coxae pale yellow, usually with dorso-apical brown spot ( Fig. 13D ); central yellow mark on mesopleuron extending beyond sternaulus ( Fig. 13D ); posterior area of propodeum strigate-rugulose ( Fig. 13B ); anterior margin of propodeum medially slightly concave ( Fig. 13B ) .............................. ............................................................................................................. Distictus paratibialis sp. nov.

4. Propodeum with sublateral elongate yellow marks ( Figs 7C , 14B ); mesosoma black or reddishbrown with distinct yellow marks ( Figs 9C , 14E ); mesoscutum centrally with yellow spot; wings hyaline; epomia distinct only after diverging from pronotal collar .................................................. 5

– Propodeum without sublateral elongate yellow marks, only with propodeal crests bright yellow ( Fig. 5B ); mesosoma almost entirely black, with a few, tiny yellow spots ( Fig. 5C ); mesoscutum centrally without yellow spot; wings infuscate ( Fig. 5C ); epomia complete ..................................... ..................................................................................................................... Distictus ardens sp. nov.

5. Orbital band continuous on temple ( Fig. 9C ); mesosoma black with yellow marks; malar space blackish; scutelar carina black ( Fig. 12B ) ........................................................................................ 6

– Orbital band interrupted on temple ( Fig. 14E ); mesosoma reddish-brown with yellow marks; malar space reddish-brown; scutelar carina mostly yellow ( Fig. 14B ) ........................................................ .................................................................................................................. Distictus terrosus sp. nov.

6. Anterior transverse carina of propodeum medially broadly arched forwards ( Figs 6B , 9B ); sublateral yellow marks of propodeum comma-shaped ( Figs 6B , 9B ); T2 with posterior yellow stripe; hind femur blackish and dark brown; epicnemial carina irregular or distinctly sinuous .......................... 7

– Anterior tranverse carina of propodeum medially weakly bent ( Fig. 7C ); sublateral yellow marks of propodeum not comma-shaped ( Figs 7C , 12F ); T2 without posterior yellow stripe; hind femur mostly reddish or light orange; epicnemial carina more or less uniformly curved .......................... 8

7. Posterior area of propodeum strigate ( Fig. 6B ); small yellow marks on collar and mesopleuron ( Fig. 6D ); T3 with blackish marks and narrow posterior yellow stripe ( Fig. 6D ); hind tibia blackish, except base, orange; spiracle of T1 not prominent; clypeus black, centrally with small yellow spot ( Fig. 6A ); thyridium about as wide as long .............................................. Distictus asterios sp. nov.

– Posterior area of propodeum strigate-rugulose ( Fig. 9B ); extensive yellow marks on collar and mesopleuron ( Fig. 9C ); T3 entirely reddish ( Fig. 9C ); hind tibia deep yellow, except apical 0.1 blackish; spiracle of T1 slightly prominent; clypeus almost entirely yellow ( Fig. 9A ); thyridium distinctly wider than long ( Fig. 9B ) ...................................................... Distictus commatus sp. nov.

8. Hind femur reddish, apically blackish ( Fig. 7D ); supra-clypeal area with three blackish marks that are almost connected centrally to form an inverted Y ( Fig. 7A ); median tubercle of clypeus large; orbital band widely interrupted on malar space, broadly disconnected at eye margin ( Fig. 7A ); spiracle of T1 not prominent; propodeum sublaterally with small yellow dot basad tranverse carina ( Fig. 7C ) ....................................................................................................... Distictus ateles sp. nov.

– Hind femur fully bright orange ( Fig. 12D ); supra-clypeal area without three blackish marks that are almost connected centrally to form an inverted Y, only with two oblique blackish marks on ventral 0.3 ( Fig. 12A ); median tubercle of clypeus small; orbital band shortly interrupted on malar space, nearly fused at eye margin ( Fig. 12A ); spiracle of T1 slightly prominent; propodeum sublaterally with distinct yellow spot basad tranverse carina ( Fig. 7C ) ................................................................. ................................................................................................................. Distictus notabilis sp. nov.

9. T4–8 blackish or dark brown, with wide posterior yellow stripes ( Figs 4C , 11C ); scutellar carina yellow; hind coxa mostly yellow, dorso-apically with large dark brown mark ( Figs 4C , 11C ); sternaulus moderately deep; epicnemial carina irregular; propleuron yellow; S2–5 bright or pale yellow ............................................................................................................................................. 10

– T4–8 blackish, without posterior yellow stripes ( Fig. 10D ); scutellar carina black; hind coxa black, dorso-basally with large yellow mark ( Fig. 10D ); sternaulus deeply impressed; epicnemial carina clearly sinuous; propleuron black; S2–5 brownish, with narrow posterior pale yellow stripes ......... ..................................................................................................................... Distictus daelus sp. nov.

10. Hind tibia blackish ( Fig. 4C ); mesoscutum coriarious, matte and with lateral yellow marks; pale yellow marks on mesosoma ( Fig. 4 B–C); fore wing vein 3-M distinctly longer than 2-M; metapleuron rugulose; supra-clypeal area pale yellow, centrally with small blackish marks ( Fig. 4A ); fore and mid coxa pale yellow, with small dorso-apical brown spots; hind t1–4 whitish ................................ ................................................................................................................. Distictus apaensis sp. nov. – Hind tibia bright yellow ( Fig. 11C ); mesoscutum densely punctate, shiny and without lateral yellow marks ( Fig. 11 B–C); bright yellow marks on mesosoma; fore wing vein 3-M about as long as 2-M; metapleuron lineate; supra-clypeal area bright yellow, without blackish marks ( Fig. 11A ); fore and mid coxa dorsally bright yellow, without dorso-apical brown spots; hind t1–4 bright yellow .......... ..................................................................... Distictus mexicanus Kasparyan & Ruíz-Cancino, 2005

Males

1. Metasoma mostly orange (RGB 226,93,5) ( Fig. 15E ), reddish (200,52,5) or reddish-brown (175,53,8) ( Fig. 14D ), rarely one or more of T2–4 with posterior yellow stripe ( Figs 8D , 10F ); hind tibia entirely yellow, or blackish only at apex .......................................................................................... 2

– Metasoma blackish, all tergites with wide posterior yellow stripe (as in Fig. 11C ); hind tibia deep yellow with basal 0.1 blackish .................... Distictus mexicanus Kasparyan & Ruíz-Cancino, 2005

2. Orbital band continuous on temple ( Fig. 15E ); scutellar carina black; mesosoma black or dark brown with extensive yellow marks ( Fig. 10F ) ........................................................................................... 3

– Orbital band interrupted on temple ( Fig. 14D ); scutellar carina almost entirely yellow; mesosoma reddish-brown with extensive yellow marks ( Fig. 14D ) .................................................................... .................................................................................................................. Distictus terrosus sp. nov.

3. T2–3 without posterior yellow stripes, rarely T2 with posterior yellow stripe ................................ 4 – T2–3 with posterior yellow stripes ................................................................................................... 6

4. Metapleuron rugulose; propodeum posteriorly rugulose ou strigate-rugulose (as in Fig. 15F ); propleuron entirely pale yellow; mid coxae entirely pale yellow; T1 mostly orange, sometimes blackish; malar space pale yellow .................................................................................................... 5

– Metapleuron lineate; propodeum posteriorly distinctly striate (as in Fig. 7C ); propleuron entirely black, sometimes with small posterior yellow spot; mid coxae ventrally blackish; T1 mostly black; malar space black ......................................................................................... Distictus ateles sp. nov.

5. Metapleuron fully black ( Fig. 15E ), without yellow mark; mesosternum entirely black, rarely with small pale yellow marks; scape dorsally brown, sometimes apically with small yellow spot ........... ..................................................................................................................... Distictus tibialis sp. nov.

– Metapleuron black with distinct yellow mark (similar to Fig. 13D ); mesosternum almost or entirely pale yellow; scape dorsally pale yellow, rarely light brown ............................................................... ............................................................................................................. Distictus paratibialis sp. nov.

6. Anterior transverse carina of propodeum almost straight ( Fig. 8B ); T4 with posterior pale yellow stripe ( Fig. 8 C–D); pronotum polished smooth along collar ( Fig. 8C ); propleuron mostly yellow; sternaulus moderately deep ( Fig. 8C ); mesopleuron shiny and weakly striate on dorsal area between hypoepimeron and epicnemial carina ..................................................... Distictus caligaris sp. nov.

– Anterior transverse carina of propodeum centrally distinctly arched forwards ( Fig. 10G ); T4 without posterior yellow stripe ( Fig. 10F ); pronotum distinctly striate along collar; propleuron entirely dark brown; sternaulus deeply impressed (as in Fig. 10D ); mesopleuron matte and almost entirely lineate .......................................................................................................... Distictus daelus sp. nov.

Figures

Fig. 7. Distictus ateles sp. nov., holotype (USUC), ♀. A. Head, frontal view. B. Areolet of fore right wing. C. Propodeum + first two tergites, dorsal view. D. Habitus. E. Apex of ovipositor, left side.

Fig. 9. Distictus commatus sp. nov., holotype (USUC) ♀. A. Head, frontal view. B. Propodeum + first two tergites, dorsal view. C. Habitus D. Apex of ovipositor, left side.

Fig. 14. Distictus terrosus sp. nov. A. Head, frontal view; holotype (UFES45302). B. Mesosoma + first tergite, dorsal view; holotype. C. Habitus of female paratype (CNCI). D. Habitus of male paratype (UFES45297). E. Habitus of holotype. F. Apex of ovipositor, left side, holotype.

Fig. 6. Distictus asterios sp. nov., holotype (USUC), ♀. A. Head, frontal view. B. Propodeum + first two tergites, dorso-lateral view. C. Apex of ovipositor, left side. D. Habitus.

Fig. 4. Distictus apaensis sp. nov., holotype (CNCI), ♀. A. Head, frontal view. B. Mesosoma, left view. C. Habitus. D. Apex of ovipositor, left side.

Fig. 10. Distictus daelus sp. nov. A–E. Holotype (USUC), ♀. A. Head, frontal view. B. Mesosoma, left side. C. Apex of ovipositor, left side. D. Habitus. E. Propodeum + hind coxae + first tergite, dorsal view. F. ♂, dorsal view. G. ♂, close-up of propodeum and basal tergites.

Fig. 11. Distictus mexicanus Kasparyan & Ruíz, 2005, paratype (USUC), ♀. A. Head, frontal view. B. Mesosoma, dorso-lateral view. C. Habitus. D. Apex of ovipositor, left side.

Fig. 13. Distictus paratibialis sp. nov. A. Head, frontal view;paratype (IBRP).B. Mesosoma +first tergite, dorsal view; holotype (LAPIS5907). C. Head, frontal view; holotype (LAPIS5907). D. Mesosoma, left side; holotype (LAPIS5907). E. Apex of ovipositor, left side, holotype (LAPIS5907).

Fig. 15. Distictus tibialis (Brullé, 1846). A–B. Head, frontal view (A: UFES; B: CNCI). C. Mesosoma, left side (UFES). D. ♀, habitus (DZUP). E. ♂, habitus (UFES45305). F. Propodeum + coxae + first tergite, dorsal view (UFES51229). G. ♀, habitus (UFES). H. Apex of ovipositor, left side (UFES45337).

Fig. 5. Distictus ardens sp. nov., holotype (USUC), ♀. A. Head, frontal view. B. Propodeum + first two tergites, dorso-lateral view. C. Habitus. D. Apex of ovipositor, left side.

Fig. 12. Distictus notabilis sp. nov., holotype (AMNH), ♀. A. Head, frontal view. B. Head + mesosoma, dorsal view. C. Head + mesosoma, right side. D. Habitus. E. Apex of ovipositor, left side. F. Dorsal view. G. Propodeum and metapleuron, left side.

Fig. 8. Distictus caligaris sp. nov., holotype (USUC), ♂. A. Head, frontal view. B. Propodeum + hind coxa + first tergite, dorsal view. C. Habitus. D. Dorsal view.