Aphelinus coreae sp. n.
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https://dx.doi.org/10.3897/jhr.26.2584 |
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lsid:zoobank.org:pub:88F262E0-6354-46B5-8599-FFFA5B1875A6 |
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https://treatment.plazi.org/id/44DE6069-99E2-29E5-04D8-95911AA84918 |
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Aphelinus coreae sp. n. |
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Aphelinus coreae sp. n. ZBK Figs 29 View Figures 29–34 42 View Figures 35–42
Diagnosis.
Females. Head and thorax dark brown to black; legs with coxae dark brown to black, profemur dark grey with distal half pale, mesofemur dark grey to black, metafemur pale yellowish white, protibia pale yellowish white to somewhat fuscous, mesotibia dark grey to black with distal half pale, and metatibia dark grey to black with pale base; metasoma dark brown with base and apex yellow; antennae yellow; F3 quadrate. Males similar except scape swollen in middle, 2.0 × as broad in middle than at distal end, with two or occasionally three circular secretory pores in the middle of a shallow depression on ventral surface, scape dark yellowish grey with distal half yellow, pedicel greyish yellow.
Description.
Female ( Figs 30, 32, 34 View Figures 29–34 , 36, 38, 39, 40, 41 View Figures 35–42 ).
Body length. 0.80-0.93 (Holotype 0.93 mm).
Head. ( Figs 30 View Figures 29–34 , 36 View Figures 35–42 ) Head 1.3 × as broad as high in frontal view, about as broad as mesosoma; frontovertex 0.4 × head width and as broad as scape length; posterior ocelli approximately their own diameter from eye margin, 5 × their diameter from one another, and 0.5 × their diameter from occipital margin; mandible with two acute teeth and a broad truncate surface below the teeth, ventral tooth sometimes not distinct; antennae as in Figs 30 View Figures 29–34 and 36 View Figures 35–42 with scape 4.0 × as long as broad, pedicel 1.6 × as long as broad, F1 anneliform, F2 1.4 × as broad as long, F3 subquadrate or very slightly broader than long, club 3.75 × as long as broad and 3.5 × longer than F3, with 7-8 linear sensilla.
Mesosoma. ( Figs 32, 34 View Figures 29–34 , 41 View Figures 35–42 ) Mesosoma and scutellum with fine reticulate sculpture, longest diameter of reticulations approximately 2-3 × diameter of scutellar sensilla; interior of reticulations with fine, granulate surface (visible only in slide-mounts under high magnification), mid-lobe of mesoscutum with 2 pairs of long setae and about 40-60 short setae, side lobes each with 2 long and 1-2 short setae; scutellum with 2 pairs of long setae; pair of scutellar sensilla approximately equidistant from anterior and posterior pairs of long setae; mesotibial spur 1.1 × mesobasitarsus; metatibial spur 0.6 × metabasitarsus.
Fore wing. ( Fig. 38 View Figures 35–42 ) 2.2 × as long as broad; costal cell with 1 row of dorsal setae and 2 rows of ventral setae, the posterior row extending from under the distal end of the submarginal vein almost to stigma, costal cell 1.3 × as long as marginal vein; submarginal vein with 5 setae; marginal vein with 12 setae along the anterior margin; stigmal vein short with stigma rounded; delta region proximal to linea calva with one complete line of 12-13 setae and 2-5 additional setae in angle with marginal vein, linea calva with no setae at its posterior edge; wing distal to linea calva with evenly spaced, dense dorsal setae and much smaller ventral setae.
Hind wing. ( Fig. 39 View Figures 35–42 ) 3.9 × as long as broad, marginal fringe 0.26 × wing width.
Metasoma. ( Figs 32, 34 View Figures 29–34 , 40 View Figures 35–42 ) 1.1 × as long as mesosoma; ovipositor inserted at basal third of metasoma, slightly exerted distally, 1.4 × as long as metatibia or mesotibia; third valvula 0.28 × length of ovipositor.
Color. ( Figs 30, 32, 34 View Figures 29–34 ) Head and mesosoma dark brown to black; legs with coxae dark brown to black, profemur dark grey with distal half pale, mesofemur dark grey to black, metafemur pale yellowish white, protibia pale yellowish white to somewhat fuscous, mesotibia dark grey to black with distal half pale, and metatibia dark grey to black with pale base; metasoma dark brown with base and apex yellow; antennae yellow; compound eyes dark burgundy, ocelli red in life, both silver-colored in dried specimens.
Male
( Figs 29, 31, 33 View Figures 29–34 , 35, 37, 42 View Figures 35–42 ). Similar to female except:
Body length. 0.68-0.81 mm.
Head. ( Figs 29 View Figures 29–34 , 35 View Figures 35–42 ) Antenna with scape swollen in center, 3.3 × as long as broad, maximum width 2 × distal width, with 2 or 3 circular, secretory pores in the middle of a shallow depression on ventral surface, pedicel 2.0 × longer than broad, F1 and F2 1.4 × broader than long, F3 rectangular, 1.3 × as long as wide at apex, club 3.2 × as long as broad, with 3-4 longitudinal sensilla.
Metasoma. ( Figs 31, 33 View Figures 29–34 , 42 View Figures 35–42 ) 1.5 × length of mesoma.
Color. ( Figs 29, 31, 33 View Figures 29–34 ) Scape dark yellowish grey with distal half yellow, pedicel greyish yellow.
Holotype female (card-mounted, deposited in USNM, USNM ENTO 00763639). "Korea, Gyeongsangnam Province, Miryang | 35°30'N, 128°44'E | 11.viii.2009, K. Hoelmer || ex: Aphis glycines | on: soybean | 2009/011 || From Lab Culture | USDA-ARS-BIIRU | Newark, Delaware"
Paratypes
(USNM, TAMU, BMNH). 13 card-mounted and 3 slide-mounted ♀♀ and 9 card-mounted and 5 slide-mounted ♂♂ with same data as holotype.
Other material examined.
None.
Host.
In the field, Aphis glycines is the only known host. In laboratory experiments, Aphelinus coreae parasitizes Aphelinus glycines and other species in the genus Aphis , and occasionally Rhopalosiphum padi and Schizaphis graminum .
Etymology.
This species is named for its country of origin. The species epithet is a noun in genitive case.
Relationships.
Aphelinus campestris and Aphelinus gossypii are the closest described species Aphelinus coreae based on our matrix of traits ( Table 2 View Table 2 ). Aphelinus coreae differs from both species in having a more elongate club in females and in coloration of the scap e and mesotibia. Like Aphelinus rhamni , Aphelinus coreae has a much narrower host range than Aphelinus gossypii . Aphelinus coreae is very close to Aphelinus rhamni , but male Aphelinus coreae have shorter clubs and, as noted in the key, the two species differ in coloration of scape and mesotibia. Although difficult to distinguish, these species are reproductively isolated in laboratory crosses. Their DNA differs by 2130 fixed substitutions and 293 indels across 1.8 megabases of homologous DNA sequence. They also differ in host specificity: Aphelinus coreae parasitizes species of Aphis , e.g. Aphelinus nerii Boyer de Fonscolombe and Aphelinus rumicis L., not parasitized by Aphelinus rhamni in laboratory experiments.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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