Epirhyssa Zuñiga & Hanson 2024
Creators: name: Zuñiga, Ronald
name: Hanson, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Epirhyssa

description: Key to Costa Rican species of Epirhyssa (females)
Modified from Gauld (1991) and Gauld and Ward (1997); additional illustrations can be found in these publications. Epirhyssa corralesi Gauld was synonymized with E. oaxaca Porter by Khalaim et al. 2021.
1. Fore wing without blackish mark at apex.................................................................. 2
- Fore wing with a distinct blackish mark at apex, or at least weakly infumate...................................... 9
2. Ventral part of occipital carina complete, joining hypostomal carina above base of mandible (Fig. 1)................... 3
- Ventral part of occipital carina absent, thus this carina does not join the hypostomal carina (Fig. 2).................... 6
3. Tergite II of metasoma extensively smooth and polished, with scattered hairs only anteriorly and laterally. E. prolasia Porter
- Tergite II of metasoma with alutaceous sculpture (fine wrinkling) over entire surface, and more or less uniformly covered with short hairs.......................................................................................... 4
4. Head, mesosoma and metasoma predominantly blackish brown (Fig. 3). [Mesoscutum with closely spaced, coarse short dark pubescence.]............................................................................ E. curtisi Gauld
- Head, mesosoma and metasoma predominantly yellowish with extensive black marks (Fig. 4)........................ 5
5. Tergite I at least 1.8 × as long as posterior width; propodeum with a narrow posteromedian black mark, occupying less than 1/3 the width of dorsal surface (Fig. 5)........................................................ E. oranensis Gauld
- Tergite I less than 1.8 × as long as posterior width; propodeum with a broad posteromedian black mark, occupying more than 1/2 the width of dorsal surface (Fig. 6)...................................... E. leonoreae Zuñiga & Hanson, sp.n.
6. Mesoscutum with three complete longitudinal black stripes, two lateral stripes not reaching lateral margin (Fig. 7)........ 7
- Mesoscutum with complete longitudinal black stripe in middle and with two lateral black marks anteriorly that reach the lateral margins but do not extend posteriorly (Fig. 8).............................................................. 8
7. Antennal flagellum black, except segments 5–7 or 6–7 yellowish orange; metasomal tergites VI–VII at least partially yellow (Fig. 9)................................................................................. E. quirosi Gauld
- Flagellum dark brown, except segments 2–5 slightly paler; metasomal tergites VI–VII entirely black (Fig. 10)..................................................................................... E. lewisi Zuñiga & Hanson, sp.n.
8. Antennal flagellum with pale band on segments 9–13 (or 15); face usually with a blackish median vertical stripe; apical margin of clypeus with a small nipple-like median tubercle (Fig. 11).................................... E. theloides Gauld
- Flagellum with pale band on segments (5) 6–9 (or 10); face uniformly yellow; apical margin of clypeus with broad rounded median tubercle (Fig. 12)............................................................... E. praecincta Porter
9. Antennal flagellum more or less entirely black basally, without a pale submedian band and with only extreme apex slightly brownish; tergite I of metasoma moderately slender, 1.6–2.2 × as long as posteriorly broad......................... 10
- Flagellum basally pale yellowish, sometimes with a submedian pale band; tergite I of metasoma very slender, 2.4 or more × as long as posteriorly broad.............................................................................. 13
10. Mesosoma and metasoma uniformly orange, face subquadrate, as broad as medially high (from clypeofacial suture to base of antenna)................................................................................ E. porteri Gauld
- Mesosoma and metasoma yellow with profuse black markings; face transverse 1.1–1.3 × as broad as medially high (from clypeofacial suture to base of antenna)................................................................... 11
11. Lateral lobe of mesoscutum entirely yellow, or with a faint yellowish brown stripe, fore wing with first subdiscal cell very strongly widened distally, its distal breadth 2.4–2.7 × its basal breadth.......................... E. mexicana Cresson
- Lateral lobe of mesoscutum with a longitudinal black stripe; fore wing with first subdiscal cell moderately widened distally, its distal breadth 1.5–2.1 × its basal breadth................................................................. 12
12. Apex of clypeus with a strong median tubercle; fore wing with a triangular black mark centered around distal end of Rs; distal apex of antenna slender, subapical flagellomeres about 1.2 × as broad as the central flagellomeres....... E. frohbergi Gauld
- Apex of clypeus without any trace of a median tubercle; fore wing with entire distal apex blackish; distal end of flagellum slightly clavate, subapical flagellomeres about 1.5 or more × as broad as the central flagellomeres................................................................................................... E. zurquiae Gauld and Ward
13. Hind coxa yellowish orange, very long and slender, in profile about 3.4 × as long as broad; metasoma entirely orange; antennal flagellum without a submedian pale band.......................................................... E. osaensis
- Hind coxa yellowish dorsally and black ventrally, moderately slender, in profile 2.7–2.9 × as long as broad; metasoma yellow and black banded; flagellum with a submedian pale band........................................ E. oaxaca Porter
description: Published as part of Zuñiga, Ronald & Hanson, Paul, 2024, Two new species of Epirhyssa (Hymenoptera: Ichneumonidae: Rhyssinae) from Costa Rica, pp. 441-450 in Zootaxa 5406 (3) on pages 442-444, DOI: 10.11646/zootaxa.5406.3.3, http://zenodo.org/record/10628032