Orasema nyamo Burks, Heraty & Dominguez, 2018

Burks, Roger A., Heraty, John M., Dominguez, Chrysalyn & Mottern, Jason L., 2018, Complex diversity in a mainly tropical group of ant parasitoids: Revision of the Orasema stramineipes species group (Hymenoptera: Chalcidoidea: Eucharitidae), Zootaxa 4401 (1), pp. 1-107 : 71-73

Orasema nyamo Burks, Heraty & Dominguez n. sp.

urn:lsid:zoobank.org:act:D589E220-977A-4609-BFBE-D0169051F28D ( Figs 147–154 )

Diagnosis. Mesoscutal midlobe and mesoscutellar disc areolate to areolate-reticulate. Axillula areolate. Petiole in females extending beyond hind coxal apex. This species is best recognized by its small size in combination with a long petiole and pale flagellum ( Figs 147, 149 , 154 ).

Orasema yaax differs in having a dark flagellum ( Fig. 263 ), and subtly different mesoscutellar sculpture ( Fig. 264 ). Orasema stramineipes differs in having an entirely yellow fore femur ( Fig. 207 ).

Description. Female. Length 2.4–3.6 mm.

Color: Head and mesosoma green to blue green dorsally, with some purple areas laterally. Pedicel yellowish brown; anellus yellowish brown; flagellum yellowish brown. Coxae brown with metallic luster dorsally, becoming yellow apically; fore femur mostly yellowish-brown, tips pale; fore; mid femur mostly yellowish brown, yellow at tips; hind femur yellow. Fore wing hyaline; venation pale brown. Petiole blue-green; gaster brown with blue to purple luster.

Head: Head width:head height 1.1–1.2; face reticulate; longitudinal groove between eye and torulus absent; eyes bare, inter-ocular distance:eye height 1.5–1.7; malar space:eye height 0.7–0.8; supraclypeal area longer than broad, smooth medially and ventrally, weakly sculptured dorsally and laterally; clypeus smooth to weakly sculptured. Flagellum length:head height 1.6–1.7; F2 2.6–3.2× as long as broad, 1.0–1.3× as long as F3; following funiculars progressively shorter and broader.

Mesosoma: Mesosoma length:height 1.1–1.5. Mesoscutal midlobe areolate-reticulate, becoming areolate posteriorly, with minute setae; lateral lobe areolate-reticulate. Axilla areolate-reticulate; mesoscutellar disc areolate to areolate-reticulate; frenal line regularly foveate; frenum areolate; axillular groove anteriorly narrow, broad and foveate posteriorly; axillula areolate. Propodeum with irregular median carina; propodeal disc areolate; callus areolate-reticulate, with 3–5 setae. Mesepisternum reticulate to areolate-reticulate laterally, smooth ventrally, broadly rounded anterior to mid coxa. Upper mesepimeron mostly smooth, with some weakly reticulate areas; lower mesepimeron areolate-reticulate; transepimeral sulcus distinct. Metepisternum laterally areolate-reticulate. Hind coxa 2.0–2.6× as long as broad; hind femur 6.3–7.1× as long as broad. Fore wing 2.4–2.9× as long as broad, 2.9–3.3× as long as mesothorax; stigma with 4 sensilla separated into pairs. Hind wing costal cell with a broad bare area.

Metasoma: Petiole 2.9–4.0× as long as broad, 1.1–1.3× as long as hind coxa, areolate to areolate-reticulate, anterior carina moderate. Antecostal sulcus crossed by carinae; acrosternite posteriorly angulate.

Male. Unknown.

Distribution. Costa Rica, Panama.

Material examined. Holotype: COSTA RICA: Puntarenas: Monteverde , 1200–1700m, 10°16'30"N, 84°49'32"W, 2–6.xii.1987, Genier & Bertrand [1 ♀, UCRCENT00425947 ], deposited in CNCI . Paratypes: COSTA RICA: Cartago: La Cangreja , 1950m, viii–ix.1991, Hanson & Godoy [1 ♀, MUCR: UCRCENT00479318 ] . Guanacaste: Estac. Mengo, SW Volcan Cacao , 1100m, 10°56'03"N, 85°27'22"W, 1988– 1989 [1 ♀, UCRC: UCRCENT00413503 ] . Guanacaste N.P., Pitilla Biological Station , 10°59'31"N, 85°28'20"W, 1.ii.1995, L. Masner, screen sweep [1 ♀, UCRC: UCRCENT00312156 ] . Heredia: Zurqui de Moravia , 1600m, 10°00'32"N, 84°00'40"W, 3–4.iii.1996, L. Masuev, creekbed, MT [1 ♀, CNC: UCRCENT00425816 (D4642)] . Puntarenas: Monteverde , 1200–1700m, 10°18'25"N, 84°48'35"W, 2–6.xi.1987, Genier & Bertrand [1 ♀, FSCA: UCRCENT00237529 ] . Monteverde , 1400m, 10°16'30"N, 84°49'32"W, 30.iv.1989, Hanson [1 ♀, UCRC: UCRCENT00413515 ] . Monteverde , San Luis Valley, 10°16'23"N, 84°49'27"W, 17.viii.1986, L. Masner [2 ♀, CNC: UCRCENT00425955 ; MUCR: UCRCENT00479300 ] . Monteverde ; Finca Canada Reserve, 10°15'21"N, 84°48'54"W, 22.viii.1992, D. Currie [11 ♀, CNC: UCRCENT00425948–54 , UCRCENT00425956 , UCRCENT00425959 , UCRCENT00479154–55 ] . Monteverde , 10°17'05"N, 84°48'48"W, 25–28.v.1998, V. Berezovosky, pan trap [2 ♀, UCRC: UCRCENT00312194–95 ] . San Jose: Zurqui de Moravia , 1600m, 10°03'00"N, 84°01'00"W, iii.1989, Paul Hanson [1 ♀, UCRC: UCRCENT00413510 ] . Zurqui de Moravia, 1600m, 10°03'00"N, 84°01'00"W, ix–x.1990, P. Hanson [2 ♀, CNC: UCRCENT00425957–58 ] . Zurqui de Moravia, 1600m, 10°03'00"N, 84°01'00"W, vii.1990, Paul Hanson [3 ♀, UCRC: UCRCENT00413505–07 ] . Zurqui de Moravia, 1600m, vii.1991, Paul Hanson [2 ♀, MUCR: UCRCENT00479307–08 ] . Zurqui de Moravia, 1600m, x– xii.1990, Paul Hanson [1 ♀, MUCR: UCRCENT00479314 ] . Zurqui de Moravia, 1600m, x.1995, P. Hanson [2 ♀, MUCR: UCRCENT00479316–17 ] . Zurqui Moravia, 1600m, v.1992, P. Hanson [1 ♀, MUCR: UCRCENT00479313 ] . PANAMA: Chiriqui: 1720m, 8°50'00"N, 82°35'00"W, 15–16.v.1973, J. Helava [1 ♀, CNC: UCRCENT00240937 ] .

Etymology. The Mangue word for “small,” referring to its generally small size relative to closely related species.

Figures

FIGURES 147–152. Orasema nyamo. ♀: 147. Habitus. 148. Head.149. Antenna, with F2 plus pedicel, and F6–F7 inset. 150. Mesosoma, dorsal view. 151. Axillula. 152. Stigma and postmarginal vein (holotype).

FIGURES 153–154. Orasema nyamo. ♀: 153. Propodeum.154. Petiole.

FIGURES 261–266. Orasema yaax. ♀: 261. Habitus. 262. Head. 263. Antenna, with F2 plus pedicel, and F6–F7 inset. 264. Mesosoma, dorsal view. 265. Axillula. 266. Stigma and postmarginal vein.

FIGURES 207–212. Orasema stramineipes. ♀: 207. Habitus. 208. Head. 209. Antenna, with F2 and F6–F7 inset. 210. Mesosoma, dorsal view. 211. Axillula.212 Stigma and postmarginal vein.