Amputoearinus pectusacutum Lindsay and Sharkey

Lindsay, Cheryl & Sharkey, Michael, 2006, Revision of the genus Amputoearinus (Hymenoptera: Braconidae: Agathidinae) with fourteen new species, Zootaxa 1329, pp. 1-27 : 17-18

Amputoearinus pectusacutum Lindsay and Sharkey sp.n. ( Figs. 3 d, 5b, 6d, 7d)

Diagnosis: This species can be distinguished from all other species of Amputoearinus by the following characters; median areola of mesosoma not depressed medially and lacking sharp carinae laterally and posteriorly; projection of propleuron acute; propodeal sculpture reduced to small protuberance anteromedially in females, and lacking a small protuberance in males.

Description: Holotype Ψ

Body length: 8.6 (8.4) mm. Color: body yellow except melanic as follows: head,

antenna, propleuron, posterior tip of metasoma, hind femur orange dorsally; forewing banded from base yellow, infuscate, yellow, infuscate; foremargin yellow basally ( Fig. 5 b). Head: antenna with 48 (45) flagellomeres.

Mesosoma: scutellar sulcus lacking longitudinal carina ( Fig. 6 d); projection of

propleuron acute (cf. Fig. 6 e); median areola of mesosoma not depressed medially and lacking sharp carinae laterally and posteriorly ( Fig. 7 d); propodeal sculpture reduced to small protuberance anteromedially (cf. Fig. 5 f); mesopleural suture with weak transverse carinae; margin between metepimeron and metepisternum smooth, lacking transverse carinae (cf. Fig. 7 b); carina bordering subpronope posteriorly, extending to anterior margin of pronotum (cf. Fig. 6a ); length of midtibial spur 0.6mm, length of midbasitarsomere 0.9mm; midtibia with 4 pegs at midlength, lacking pegs apically; hind tibia with 4–6 pegs apically; forewing length 8.0mm. Metasoma: median syntergite 2+3, length 1.9mm, width 1.7mm.

Variation: paratype male; the lone male specimen of this species differs in having no propodeal sculpture and lacking a small protuberance anteromedially; body yellow except for as follows: head, antenna, propleuron, all black; midfemur yellow dorsally, black ventrally; hind coxa black; hind femur brown ventrally; yellow dorsally; hind tibia black apically, tarsomeres brown; metapleuron brown; distal two segments of metasoma black.

Etymology: from the Latin acutus, meaning acute and the Latin pectus meaning chest because of the extremely acute projection of the propleuron of this species.

Specimen examined: HOLOTYPE. Ψ, COLOMBIA, Bolivar, Zambrano, Hda. Monterrey, [9°44’58”N 74°49’5”W], Ene [Jan.], [19]95, F. Fernandez, (entire left midleg missing), (UNCB).

PARATYPE. BRAZIL, ♂, Mato Grosso Sinop, [15°0’S 59°57’W], xi.1975, M. Alvarenga, Malaise Trap, (entire left hind leg missing, left front leg broken at femur), (AEI).

Figures

FIGURE 3. Lateral habiti. a) A. gloriae b) A. matamata c) A. niger d) A. pectusacutum e) A. pitzi f) A. planusfunditus.

FIGURE 5. Forewings: a) A. niger b) A. pectusacutum c) A. alafumidus. Propodeal sculpture: d) ♂ A. flavocacumen e) Ψ A. galbus f) Ψ A. gloriae g) Ψ A. matamata h) Ψ A. niger.

FIGURE 6. a) A. variegatus carina bordering subpronope posteriorly, extending to anterior margin of pronotum b) A. galbus carina bordering subpronope posteriorly, not extending to anterior margin of pronotum c) A. boringi dorsal view showing presence of carina on scutellar sulcus d) A. pectusacutum dorsal view showing absence of carina on scutellar sulcus e) A. pectusacutum projection of propleuron acute f) A. flavocacumen projection of propleuron blunt.

FIGURE 7. a) Ψ A. galbus margin between metepimeron and metepisternum with transverse carinae b) Ψ A. sharanowskiae margin between metepimeron and metepisternum smooth, lacking transverse carinae c) Ψ A. gloriae dorsal view showing median areola of mesosoma depressed medially with sharp carinae laterally and posteriorly d) ♂ A. pectusacutum dorsal view showing median areola of mesosoma not depressed medially, lacking sharp carinae laterally and posteriorly.