Empria takeuchii Prous & Heidemaa

Prous, Marko, Heidemaa, Mikk, Akihiko, Shinohara & Soon, Villu, 2011, Review of the sawfly genus Empria (Hymenoptera, Tenthredinidae) in Japan, ZooKeys 150, pp. 347-380 : 360-361

Empria takeuchii Prous & Heidemaa sp. n.

Type-locality.

Japan, Honshu, Yamanashi Prefecture, Utsukushinomori, Yatsugatake Mts.

Holotype.

1 female, NSMT. Labelled: "[JAPAN:Honshu] Utsukushinomori 1500-1700m Yatsugatake Mts. Yamanashi Pref. 5-8. VI. 2000 A. Shinohara", "NSMT044", "Holotypus ♀ Empria takeuchii sp. n. design.: M. Prous & M. Heidemaa 2011", " Empria takeuchii sp.n. Prous & Heidemaa det. 2011".

Paratypes.

"Shimashima Nagano Pref 16. V. 1984 A. Shinohara", 1 female, NSMT032 (NSMT); "[JAPAN:Honshu] Kamiange, Mt. Jinba Tokyo 27. IV. 2003 A. Shinohara", 1 male, NSMT037 (NSMT); "Ōmi, Ō hara [Ōhara] Kyoto Pref. 15. V. 1984 R. Inagawa", 1 female, NSMT041 (NSMT); "[Ōmi, Ōhara] Sakyo-ku, Kyoto Kyoto Pref. May, 14, 1984 T. Matsumoto leg." 1 female, NSMT211 (NSMT); "[JAPAN: Honshu] Yokotemichi, ca. 850m 35-22-39N 133-31-21E Mt. Daisen Tottori Pref. 28-29. IV. 2007 A. Shinohara", 1 male, NSMT112 (NSMT); "Takihata Kawachi-Nagano Osaka 22. IV. 1981 A. Shinohara", 1 male, NSMT213 (NSMT); "JAPAN: Ishikawa Pref., Mt. Shiritaka 637 m, May 19 1979 D. Smith & I. Togashi" 1 female, USNM2051678_047 (USNM); "JAPAN: Honshu Tamozawa, Nikkô-shi Tochigi-ken, Mal. trap 13-27.iv.2009 Takeyuki Nakamura leg.", 1 male, USNM2057434_03 (USNM).

Other material examined.

"JAPAN, Hokkaido Ginsendai, Kamikawa-chô 43°40'N, 143°01'E, 947 m Selectively cut forest 6-27.vi.2008 Mal. trap, A. Ueda leg" 1 female, USNM2051678_011 (USNM); "JAPAN, Hokkaido Sekihoku-tôge, Kamikawa-chô, natural forest, 993 m 43°40'N, 143°06'E, 6-27.vi.2008 Mal. trap, A. Ueda leg." 3 males, USNM2051678_008, USNM2051678_031, USNM2051678_061 (USNM); " 42°57'N, 141°14'E Hakken-zan Sapporo, Hokkaidō JAPAN 16.v.2009 Takuma YOSHIDA leg." 2 males, USNM2057434_06, USNM2057434_07 (USNM).

Female.

Body length. (5.1)6.4-6.9 mm.

Colour. Black; following parts more or less unpigmented, whitish or yellowish brown: labrum; apical maxillary and labial palpomeres; tegulae completely; posterodorsal margin of pronotum in lateral part rather widely, upper part of posterolateral margin of pronotum quite narrowly; pro-, meso-, and metacoxa apically; pro-, meso-, and metatrochanter partly or in most part; pro-, meso-, and metatrochantellus partly or completely; profemur in anterior, posterior, and lateral aspects; mesofemur and metafemur apically slightly; protibia in anterior and posterior aspects; mesotibia in most part; metatibia in basal 2/3; tarsomere 1 of hind leg in basal 2/3; paired patches on abdominal terga 2-4(5); posterior margins of terga and sterna; and cenchri (in one female only posterior margin).

Head. Head behind eyes in dorsal view subparallel sided; postocellar area trapeziform, its length mostly less than or equal to 2 times of lateral ocellus diameter; area between frontal crests in dorsal view reaches or slightly exceeds the level of crests; face and clypeus with somewhat irregular punctures, less shining compared to vertex and especially to postocellar area; ocellar and postocellar area at least slightly raised; clypeus tridentate, with median tooth smaller than lateral teeth; clypeus with median keel; malar space (minimal ventro-ocular distance) shorter or equal to distance between antennal sockets; frontal ridge "V"-shaped, central part of frontal field with distinct pit; maximal length of temple 1.25-1.4 times greater than its minimal length; flagellum 1.8-2.0 times longer than breadth of head.

Thorax. Anterior part of mesoscutum with more or less distinct punctures, its median and postero-lateral portions in most part with sparse indistinct punctures and glossy interspaces, or almost impunctate, glossy; mesoscutellum, mesoscutellar appendage, and metapostnotum impunctate and glossy; mesepisternum with more or less indistinct punctures, mostly glossy; mesepimeron with setae on posterior part; metepisternum with evenly distributed setae; metepimeron in central part without setae; distance between cenchri in most specimens about equal to cenchrus width, but sometimes slightly greater; wings hyaline with brownish venation; closed cell M in hindwing present; tarsal claws with conspicuous subbasal tooth.

Abdomen. Terga mostly with keel-like (sometimes mixed with scale-like) sculpticells and short setae (about half of lateral ocellus diameter); ventral margin of valvula 3 abruptly bending towards apex, about equal in length to valvifer 2; serrulae of valvula 1 as in Fig. 19, number of serrulae (15)16-17.

Male.

(Mostly the differences compared to female are given).

Body length. 5.6-5.8 mm.

Colour. Unpigmented, whitish or yellowish are: meso- and metatrochanter apically; pro-, meso-, and metatrochantellus partly; mesofemur only apically, or in anterior, posterior, and lateral aspects; metafemur apically; mesotibia partly in anterior, posterior, and lateral aspects, or in most part; metatibia in basal 1/3 or in basal 1/2; outer margins of harpes; paired patches on abdominal terga 2-4(3).

Head. Area between frontal crests in dorsal view not exceeding the level of crests; length of postocellar area 1.5-2.0 times of lateral ocellus diameter; maximal length of temple 1.25-1.45 times greater than its minimal length; flagellum 2.2-2.7 times longer than breadth of head.

Abdomen. Posterior margin of sternum 9 round; tergum 8 without tergal hollows and procidentia; penis valve as in Fig. 30.

Taxonomic affinities.

Morphologically, no certain closest relative can be specified. Superficially may resemble Empria rubicola (based on males), Empria honshuana (based on females), or Empria tridentis (both have pale trochanters and trochantelli). Penis valve (Fig. 30) and valvula 1 (Fig. 19) clearly distinguish this species from all other known species of Empria . According to the molecular analyses (of ITS1 and ITS2 combined with mtDNA sequences), the closest species are those of the Empria longicornis and Empria immersa species groups, and Empria tridentis (Fig. 38, 40).

Host plants.

Unknown.

Distribution.

Japan (Hokkaido, Honshu).

Etymology.

The specific name refers to Kichizo Takeuchi (1892-1968), who made great contributions to the sawfly systematics in eastern Asia.

Notes.

Six additional studied specimens (1 female, 5 males) from Hokkaido were not included in the type series. The female and most of the males have a longer postocellar area (more than 2 times of the lateral ocellus diameter) compared to the specimens from Honshu (mostly less than 2 times). Serrulae of the Hokkaido female are also slightly different (cf. http://www.morphbank.net/?id=693521 and Fig. 19). No clear differences were found in the structure of penis valves between the specimens from Hokkaido and Honshu.