Primeuchroeus yongdaerianus Kim

Kim, Jeong-Kyu, 2013, Description of a new species of the genus Primeuchroeus Linsenmaier, 1968 (Hymenoptera, Chrysididae) from Korea and redescription of P. malayensis (Linsenmaier, 1982), Zootaxa 3686 (1), pp. 95-98 : 95-96

Primeuchroeus yongdaerianus Kim , spec. nov.

( Fig. 1 )

Diagnosis. Rs stub of fore wing short, about half the stigma length. TFC goggle-like in shpae. Genal carina and subgenal carina well-developed. Flagellomeres X and XII edged by dull carinae with concave facets in holotype female, but only the last segment edged in paratype female. Apical margin of tergum III edentate, at most its lateral margin obtusely edged and dorsomedian point weakly angulate, without tooth. All tibiae and tarsi pale brown.

Description. FEMALE (holotype). Body length 4.05 mm from dorsoanterior margin of head to posterior margin of metasomal tergum III ( Fig. 1 A). Punctures on head, mesosoma and metasomal tergum I almost same in their moderate (partially close) distribution and large size ( Fig. 1 A). Propodeum loosely reticulate. Punctures on dorsal part of tergum II transversely extended and oval in shape which is likely to be formed by fusing of two small round punctures, coarse, and distinctly smaller and closer than those on tergum I; those on lateral part larger and finer than on dorsum, and moderate to dense. Punctures on tergum III similar to those on dorsum of tergum II, but those on apical part feeble, almost obsolete; basal part of tergum III (probably accidentally exposed) with fine and sparse punctures. All femoral faces distinctly coriaceous, without puncture.

Dorsomedian part of pronotal collar with pair of pits spaced by 1.7 medioocellar distance (MOD). Scapal basin deeply excavated and polished, upper one-third smooth, lower two-thirds compactly cross-ridged with dense punctures laterally. TFC highly raised and goggle-like in shape ( Figs. 1 B, 1C). Genal carina and subgenal carina well-developed, reaching mandibular articulation; broadest subgenal area ca. 4 times narrowest genal area. Flagellomere I ca. 2.2 times as long as broad, and ca. 1.2 times as long as flagellomere II; flagellomeres X–XI edged by dull carina, and each facet slightly concave; apical flagellomere somewhat strongly pointed, edged by carina, and facets slightly concave. Notauli deep and distinct. Metasomal tergum III with pit rows somewhat deeply impressed; apical lamina semi-transparent brown, and its apical margin edentate, at most dorsomedian point weakly angulate; middle part of tergum III somewhat strongly compressed and prepit area somewhat strongly bulged.

Fore wing 2.30 mm long; veins somewhat hardened and darkened; Rs stub about half as long as stigma ( Fig. 1 D).

Head, mesosoma, tergum I, lateral and apical parts of tergum II and apical marginal part of tergum III lustrous green. Lateral sections of mesonotum and scutellum with coppery luster. Interspaces among punctures of vertex, pronotal collar and median section of mesonotum, and larger median part of tergum II and tergum III blackish purple to blackish. Sterna I–III blackish except for basomedian lustrous green part on sternum II. Antennal scape, all coxae and all femora except for apical parts lustrous green. Apical part of all femora, all tibiae and tarsi pale brown. Tegula and flagellomeres blackish; apical four flagellomeres ventrally blackish brown.

Paratype female is very similar to the holotype female except for the following details. Body length 3.60 mm. Only apical flagellomere below concave and bordered by carinae. Paratype MALE is almost identical with the females in structure and coloration. However, antennal fagellum normal without carinae and concave facet; flagellomere I ca. 1.6 times as long as broad, and ca. 1.3 times as long as flagellomere II.

Material examined. HOLOTYPE, Ƥ."Kr. GW. Inje-gun, Buk-myeon, Yongdae-ri [38°14.14'N, 128°20.36'E, ca. 499 m alt.], 28 June 2012, JK Kim" [white printed label], "HYM CHS 0 0 2 / BDIH " [white printed label], " HOLOTYPE / Primeuchroeus / yongdaerianus / Kim / sp. n. / 2012" [red handwritten label]. Paratypes, 1Ƥ, "Kr. GW. Inje-gun, Bukmyeon, Yongdae-ri, 28 July 2011, JK Kim" [white printed label], "HYM CHS 0 0 3 / BDIH ", " PARATYPE / Primeuchroeus / yongdaerianus / Kim / sp. n. / 2012 [red handwritten label]; 13 in alcohol, "Kr. GW. Inje-gun, Bukmyeon, Yongdae-ri, 28 June 2012, JK Kim" [white printed label], "HYM CHS 0 0 4 / BDIH " [white printed label], " PARATYPE / Primeuchroeus / yongdaerianus / Kim / sp. n. / 2012" [red handwritten label].

Distribution. South Korea (Gangwon-do).

Etymology. Named after the type locality (Yongdae-ri) in Korea.

Ecology. Holotype and paratypes were collected on the wood walls of old-fashioned house during late June to late July.

Discussion. This new species is a member of the Primeuchroeus siamensis -group characterized by a distinct subgenal area and short Rs stub ( Kimsey & Bohart 1991). This new species superficially resembles P. malayensis . However, this new species is very distinct in having doubled and closed TFC (goggle-like in shape, Figs. 1 B, 1C) and dully carinate and concave antennal segments X-XII in holotype (or XII in paratype).

Figures

FIGURE 1. Primeuchroeus yongdaerianus spec. nov. A. Habitus, in dorsal (left) and in lateral view (right); B. Head, frontal view; C. Head, dorsolateral view showing TFC; D. Fore wing. Scale bar 0.5 mm.