Epirhyssa peruana Enderlein 1919

Gómez, Isrrael C., Sääksjärvi, Ilari E., Puhakka, Liisa, Castillo, Carol & Bordera, Santiago, 2015, The Peruvian Amazonian species of Epirhyssa Cresson (Hymenoptera: Ichneumonidae: Rhyssinae), with notes on tropical species richness, Zootaxa 3937 (2), pp. 311-336: 329

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Epirhyssa peruana Enderlein 1919


Epirhyssa peruana Enderlein 1919 

( Figs 5View FIGURE 5 D, 6 G)

Diagnosis. This species can be distinguished from all other Neotropical Epirhyssa  by the combination of the following characters: 1) tergite I about 2.0– 2.4 times as long as posteriorly broad; 2) occipital carina not joining hypostomal carina; 3) submetapleural carina complete; and 4) mesoscutum with transverse rugae rather long and sharp.

Distribution. Bolivia; Brazil; Guyana; Peru.

Material examined. Female ( BMNH) British Guiana, Essequibo R., 21.VIII. 1929, Oxf. Univ. Exped., BM. 1929 - 485. Male ( BMNH) British Guiana, Coll. Richards & Smart, Bartica Potaro, 30.VIII. 1937, BM. 1937 - 776. Female ( BMNH) Bolivia, Santa Cruz, Puerto Grether, 230 m., 20.IX. 1981, M. Cooper, BMNH (E) 2005 - 152.

Biological notes. This species is well distributed in South America.

Epirhyssa perufinlandensis Gómez & Sääksjärvi  sp. n. ( Figs 6View FIGURE 6 C, 6 F, 7 E)

Type material. Holotype female ( UNSM, currently on loan to ZMUT). Peru: Dept. of Loreto, Reserva Nacional Allpahuayo-Mishana, 3 ° 58 ’ 35 ” S, 73 ° 25 ’ 57 ” W, 124 m., clay. Sääksjärvi et al. leg., Malaise, C 1 (4), 4–20.X. 1998. Paratype female ( ZMUT), as above but F 1 (1), 2000.

Female ( Fig. 6View FIGURE 6 C). Fore wing length about 16–18 mm. Head with occipital carina laterally strong, interrupted dorsally, not joining hypostomal carina; posterior ocellus separated from eye by about 2.0 times its diameter; mandibles stout, lower tooth slightly longer than upper one; clypeus with central part slightly concave, lateral corners angularly produced, centrally with a small rounded apical tubercle; lower face about 1.2 times as broad as medially long, laterally polished, centrally with strong wrinkles and sparse yellowish setae; antenna slender with 36 flagellar segments; gena polished with granulate and dense setae. Mesosoma with strong epomia diverging from anterior margin of pronotum; mesoscutum with central lobe overhanging pronotum, transverse rugae discontinuous and rounded with dense short pubescence ( Fig. 6View FIGURE 6 F); mesopleuron with setiferous punctures; subalar prominence inflated; epicnemial carina ventrally reaching above level of lower corner of pronotum; hind coxa in profile about 3.3 times as wide as deep; fore wing with cu-a slightly distal to Rs&M; first subdiscal cell moderately broadened distally, its width near outer end about 1.5 times its basal width; abscissa of M between 2 rs-m and 2 m-cu about 0.4 times as long 2 rs-m; Rs weakly and evenly bowed; propodeum stout, with fine rugae and long setae; submetapleural carina present. Metasoma with tergite I about 2.1–2.5 times as long as posteriorly broad, dorsally polished with fine wrinkles ( Fig. 7View FIGURE 7 E); tergite II about 1.0 times as long as posteriorly broad, finely coarse with close pubescence, posteriorly with sparse hairs, tergites III+ with finer and more uniformly short dense pubescence; ovipositor projecting beyond apex of metasoma by about 5.6 times length of hind tibia.

Coloration. A blackish species; paratype with face laterally, mesosternum and external parts of coxae, femora and tibiae with yellow brownish marks. Ovipositor sheath brown. Wings yellowish with brownish band along costal area; pterostigma yellowish.

Male. Unknown.

Diagnosis. This species can be distinguished from all other Neotropical Epirhyssa  by the combination of the following characters: 1) large and entirely blackish species; 2) tergite I polished with fine wrinkles; 3) propodeum short and finely granulate with dense, long setae; 4) central lobe of mesoscutum overhanging pronotum apically; and 5) mesoscutum with transverse rugae short and rounded. Epirhyssa perufinlandensis  sp. n. is similar in appearance to E. tristis Kriechbaumer  ; however, the shorter and rounded transverse rugae on the mesoscutum and the shorter and more robust ovipositor differentiate E. perufinlandensis  sp. n.

Biological notes. This species occur currently in lowland northern Peruvian Amazonia, nothing is known about its hosts.

Etymology. The name perufinlandensis  refers to the long scientific collaboration between Peru and Finland.

Distribution. Peru.


University of Nebraska State Museum


University of Tokyo, Department of Zoology