Pristomerus Curtis, 1836

Heydari, Maryam Zardouei, Rakhshani, Ehsan, Rousse, Pascal, Mokhtari, Azizollah & Schwarz, Martin, 2020, A new species of Pristomerus Curtis, 1836 (Hymenoptera, Ichneumonidae Cremastinae) and key to the known species in Iran, Zootaxa 4809 (1), pp. 187-194 : 192

Key to the species of the genus Pristomerus Curtis, 1836 in Iran

1. Body entirely pale yellow ( Fig. 4C ), flagellomeres, small spots on the median and lateral lobes of mesoscutum and dorsal part of metasoma brown................................................................................... 2

- Body mostly black ( Figs. 4A, 4B, 4D ), at most metasomal tergites with a narrow yellow band on posterior margins........ 5

2. Fore wing with Cu & cu-a intercepted at least at 0.85 of its length, or not broken at all.............................................................................................. Pristomerus mesopotamicus Horstmann, 1990

- Fore wing with Cu & cu-a intercepted at 0.65–0.8 of its length ( Figs 1G , 3C )...................................... 3

3. Fore wing with vein 1/M between Rs and 2m-cu about as long as Rs ( Fig. 3C ). Second metasomal tergite smooth................................................................................. Pristomerus luridus Kokujev, 1905

- Fore wing with vein 1/M between Rs and 2m-cu distinctly longer or shorter than Rs ( Fig. 1G ). Second metasomal tergite longitudinally striate ( Fig. 1I )............................................................................... 4

4. Mesoscutum very densely punctured ( Fig. 1E ). Propodeal areola 1.7× as long as wide ( Fig. 1F ). Fore wing with 1/M between Rs and 2m-cu distinctly longer than (about 1.4×) Rs ( Fig. 1G ). Hind femur (female) narrow (its length about 4.0× its width), with a small and straight tooth-like process on ventral margin ( Fig. 1H )............................................................................................... Pristomerus mirzakhaniae Zardouei & Rakhshani sp. nov.

- Mesoscutum very sparsely punctured. Propodeal areola 2.8× as long as wide. Fore wing with 1/M between Rs and 2m-cu distinctly shorter than (about 0.6×) Rs. Hind femur (male) thick (its length about 3.0× its width), with a weak and straight toothlike process on ventral margin, followed by a row of rather strong denticles........ Pristomerus persicus Riedel et al. 2019

5. Occipital carina dorso-medially interrupted and slightly down-curved ( Fig. 2B ). Eyes slightly convergent in lower part ( Fig. 2E ). Hind femur uniformly yellowish and stout (its length about 3.4× its width) ( Fig. 3D ). Second lateral area of propodeum wide, its length less than 1.4× width) ( Fig. 2H )................................ Pristomerus horribilis Narolsky, 1987

- Occipital carina dorso-medially not interrupted ( Figs. 2A, 2C ). Eyes slightly divergent in lower part ( Figs. 2D, 2F ). Hind femur basally and apically yellowish and slender (its length about 3.7× its width) ( Figs. 3B, 3F ). Second lateral area of propodeum narrow, its length more than 1.8× width) ( Figs. 2G, 2I )........................................................ 6

6. Propodeal areola 2.0× as long as wide ( Fig. 2G ). Fore wing with vein 1/M about 1.4× as long as Rs ( Fig. 3A ). Female hind femur with a strong and straight tooth-like process on ventral margin ( Fig. 3B )........ Pristomerus armatus ( Lucas, 1849)

- Propodeal areola 1.3× as long as wide ( Fig. 2I ). Fore wing with vein 1/M about 1.8× as long as Rs ( Fig. 3E ). Female hind femur with a strong and curved tooth-like process on ventral margin ( Fig. 3F )............ Pristomerus vulnerator (Panzer, 1799)

Figures

FIGURE 1. Pristomerus mirzakhaniae sp. nov.—Female: A) head, lateral view; B) head, dorsal view; C) head, frontal view; D) mesosoma, lateral view; E) mesoscutum, dorsal view; F) propodeum, dorsal view; G) fore wing; H) hind femur; I) second tergite of metasoma; J) habitus, lateral view.

FIGURE 2. Pristomerus species, head and propodeum: Pristomerus armatus (Lucas, 1849)—female, A. head, dorsal view, D. head, frontal view, G. propodeum, dorsal view; Pristomerus horribilis Narolsky, 1987—female, B. head, dorsal view, E. head, frontal view, H. propodeum, dorsal view; Pristomerus vulnerator (Panzer, 1799)—female, C. head, dorsal view, F. head, frontal view, I. propodeum, dorsal view;

FIGURE 3. Pristomerus species, fore wing and hind femur: A. and B. Pristomerus armatus (Lucas, 1849)—female; C. Pristomerus luridus Kokujev, 1905—male; D. Pristomerus horribilis Narolsky, 1987; E. and F. Pristomerus vulnerator (Panzer, 1799)—female.

FIGURE 4. Pristomerus species, general habitus: A. Pristomerus armatus (Lucas, 1849)—female; B. Pristomerus horribilis Narolsky, 1987—female; C. Pristomerus luridus Kokujev, 1905—male; D. Pristomerus vulnerator (Panzer, 1799)—female.