Triclistus

Alvarado, Mabel & Rodriguez-Berrio, Alexander, 2013, Ten new species of Triclistus Förster, 1869 (Hymenoptera, Ichneumonidae) from Peru, with a key to Neotropical species, Zootaxa 3702 (5), pp. 401-423 : 420-421

Key to the Neotropical species of Triclistus

1. Propodeum in profile evenly declivitous ( Fig. 11 ), with lateromedian longitudinal carinae entirely absent( Figs 17, 18 ); tergite I dorsally smooth, without lateromedian longitudinal carina..................................................... 2

- Propodeum in profile weakly declivitous ( Figs 12, 13 ) or not declivitous and then abruptly down-turned posteriorly ( Figs 14- 16 ), with lateromedian longitudinal and posterior transversa carinae developed ( Figs 19-22 ); tergite I with lateromedian longi- tudinal carina present, sometimes vestigial................................................................. 8

2. Posterior transverse carina absent ( Fig. 17 ); fore wing with no trace of vein 3rs-m, thus without an areolet.............. 3

- Posterior transverse carina present ( Fig. 18 ), generally discernible, rarely only partially present centrally; fore wing with 3rs-m discernible, generally enclosing a distinct areolet, very rarely only partially present so areolet is open apically............ 4

3. Tergite II subquadrate, at least 0.8x as long as wide; wings hyaline; metasoma entirely black. rivwus Gauld & Sithole 2002 *

- Tergite II rectangular, 0.4–0.6x as long as wide; wings infuscate ( Fig. 2 ); metasoma with tergite I creamy white with center black ( Fig. 17 ), tergites II–IV with lateral and posterior borders creamy white, remainder black............. bicolor sp. n.

4. Mesosoma with large reddish brown markings, or entirely reddish brown......................................... 5

- Mesosoma more or less entirely black, at most with tegula yellowish........................................... 7

5. Posterior ocellus separated from compound eye by about 0.5x its own maximum diameter; metasoma reddish brown; propo- deum with posterior transverse carina centrally faint or lacking....................... mellisas Gauld & Sithole 2002 *

- Posterior ocellus separated from compound eye by about its own maximum diameter; metasoma black; propodeum with pos- terior transverse carina complete ( Fig. 18 )................................................................ 6

6. Metapleuron predominantly black with isolated setae; submetapleural carina with a series of pits.................................................................................................... pailas Gauld & Sithole 2002 *

- Metapleuron predominantly reddish, smooth and hairless; submetapleural carina without series of pits ( Fig. 11 ). cholo sp. n.

7. Tergite I smooth and with isolated setae ( Fig. 23 ); antenna with 25 flagellomeres; hind femur predominantly cream colored with the base black............................................................................ inti sp. n.

- Tergite I smooth with two parallel rows of setae ( Fig. 24 ); antenna with 34 flagellomeres; hind femur predominantly black with the apex cream colored............................................................... megantoniensis sp. n.

8. Labrum exposed when mandibles closed ( Fig. 26 , 33, 34 ); propodeum quite long, rather flat then abruptly rounded posteriorly ( Figs 14-16 ), with lateromedial longitudinal carinae strong ( Fig. 19 ); head in dorsal view with genae slightly declivitous then abruptly rounded ( Fig. 25 ); fore wing with vein 3rs-m absent.................................................. 9

- Labrum not exposed when mandibles closed ( Figs 28 , 30, 32 ); propodeum anteriorly weakly declivitous, posteriorly rounded ( Figs 12, 13 ), with lateromedial longitudinal carinae sometimes weak ( Fig. 20 ); head in dorsal view with genae homoge- neously rounded ( Figs 27 , 31 ) or homogeneously compressing towards occipital carina ( Fig. 29 ); fore wing with vein 3rs-m present........................................................................................... 12

9. Lower half of face concave ( Fig. 33 ); metapleuron with setae ( Fig. 15 )............................ ashaninka sp. n.

-. Face slightly convex ( Figs 26 , 34 ); metapleuron hairless ( Fig. 14, 16 )......................................... 10

10. Metapleuron and tergite I highly polished but with fine alutaceous sculpture over most of surface................................................................................................. tabetus Gauld & Sithole 2002 *

- Metapleuron smooth, without any trace of microsculpturing; tergite I smooth and finely punctate ( Fig. 19 )............ 11

11. Metapleuron with intersection between submetapleural and pleural carinae angulate ( Fig. 14 ); submetapleural carina carinate; fore and mid legs yellowish brown........................................................ matsiguenga , sp. n.

- Metapleuron with intersection between submetapleural and pleural carinae curved ( Fig. 16 ); submetapleural carina smooth; fore leg yellowish brown with coxa and femur infuscate, mid leg with coxa, femur and distal apex of tibia blackish................................................................................... slimellus Gauld & Sithole 2002 *

12. Head in dorsal view with gena declivitous ( Fig. 29 )......................................................... 13

- Head in dorsal view with gena curved ( Fig. 31 )........................................................... 16

13. Posterior transverse carina curved at the intersection with lateromedian longitudinal carinae ( Fig. 22 ); mesoscutum slightly concave............................................................................................ 14

- Posterior transverse carina angulate at the intersection with lateromedian longitudinal carinae ( Fig. 21 ); mesoscutum slightly convex............................................................................................ 15

14. Face basally concave ( Fig. 8 ); tergite II 0.8 times as long as wide; hind leg dark brownish................... muqui sp. n.

- Face basally flat ( Fig. 30 ); tergite II as long as wide; hind leg black with white spots ( Fig. 3 )............. castilloai sp. n.

15. Fore wing with abscissa of 2 rs-m between Rs+2r and 3 rs-m 0.5 times as long as abscissa of 2 rs-m between 3 rs-m and 1 m-cu ( Fig. 9 ); hind femur brown................................................................... warmi sp. n.

- Fore wing with abscissa of 2 rs-m between Rs+2r and 3rs-m 0.2 times as long as abscissa of 2 rs-m between 3rs-m and 1m-cu, ( Fig. 10 ); hind femur yellowish brown.......................................................... yungas sp. n.

16. Tergite I of metasoma with lateromedian carina vestigial, at most only discernible anteriorly; propodeum with lateromedian longitudinal carina weak and only developed basally ( Fig. 20 )......................... xodius Gauld & Sithole 2002 *

- Tergite I of metasoma with lateromedian carina developed and discernible; propodeum with lateromedian longitudinal carina developed, reaching at least 0.3x length of tergite I................................... vaxinus Gauld & Sithole 2002 *

Figures

FIGURE 2. Lateral habitus of Triclistus bicolor sp. n. paratype female

FIGURE 3 Lateral habitus of Triclistus castilloai sp. n., holotype female.

FIGURE 8 Lateral habitus of Triclistus muqui sp. n., holotype female

FIGURE 9 Lateral habitus of Triclistus warmi sp. n., holotype female

FIGURE 10 Lateral habitus of Triclistus yungas sp. n., holotype female.

FIGURES 11 – 16. Metapleuron, lateral view; 11 Triclistus cholo sp. n. paratype female; 12 T. castilloai sp. n., holotype female; 13 T. xodius Gauld & Sithole paratype female; 14 T. matsiguenga sp. n., holotype female; 15 T. ashaninka sp. n., holotype female; 16 T. slimellus Gauld & Sithole paratype female.

FIGURES 17 – 22. Propodeum and basal mesosoma, dorsal view; 17 Triclistus bicolor sp. n. paratype female; 18 T. cholo sp. n. paratype female; 19 T. matsiguenga sp. n., holotype female; 20 T. xodius Gauld & Sithole, paratype female; 21 T. warmi sp. n., holotype female; 22 T. castilloai sp. n., holotype female.

FIGURES 23 – 28; 23 – 24 Tergite I; 23 T. inti sp. n., holotype female and 24 T. megantoniensis sp. n., holotype female. 25 – 26 Head of T. matsiguenga sp. n., holotype female; 25 ventral view, 26 dorsal view. 27 – 28 Head of T. cholo sp. n., paratype female; 27 ventral view, 28 dorsal view.

FIGURES 29 – 34; 29 – 30 Head of T. castilloai sp. n., holotype female; 29 ventral view, 30 dorsal view. 31 – 32 Head of T. xodius Gauld & Sithole paratype female; 31 ventral view, 32 dorsal view. 33 – 34 Head, ventral view; 33 T. ashaninka sp. n., holotype female. 34 T. slimellus Gauld & Sithole, paratype female.