Lestiphorus yamatonis Tsuneki, 1963

Mokrousov, Mikhail V. & Proshchalykin, Maxim Yu., 2023, Lestiphorus bilunulatus yamatonis Tsuneki, 1963 (Hymenoptera, Crabronidae) raised to full species status, with description of the hitherto unknown male, Zootaxa 5375 (4), pp. 589-594 : 590-592

Lestiphorus yamatonis Tsuneki, 1963 , stat. nov.

( Figs 1–4 , 6 )

Lestiphorus bilunulatus yamatonis Tsuneki, 1963: 9 , ♀. Holotype: ♀, Japan, Nikko (Tochigi Pref., Honshu) [originally K. Tsuneki coll., now in Museum of Nature and Human Activities, Hyogo, Japan]. Erroneously synonymized with Lestiphorus bilunulatus A. Costa, 1867 by Mokrousov

. 2020: 22.

Lestiphorus bilunulatus : Yasumatsu 1950: 1471 ( Japan); Kawano 2012: 55 ( Japan); Mokrousov et al. 2020: 22 (partly, only material from Japan).

Material examined. Russia. Kunashir Island : Ivanovskij Cape, 1–20.IX.2013, 9 ♀, 4 ♂, 28–29.IX.2013, 10 ♀, Yu. Sundukov, L. Sundukova collectors; idem, 18–21.IX.2014, 4 ♀, Yu. Sundukov collector [ MMC / FSCV / ZISP]; Dokuchaeva Cape, 30.VII–2.VIII.2013, 1 ♂, Yu. Sundukov, L. Sundukova collectors [ MMC] . Japan. Honshu , Fukui-ken , Aburasaka Pass, Izumi-mura, 4.VIII.1993, 1 ♀, A. Lelej collector [ FSCV] .

Diagnosis. Closely related to L. bilunulatus A. Costa, 1867 . The differences are given in the identification key below.

Description. Female. Body length 8.7–12.3 mm. Head black with yellow clypeus (except brown apical edge), lower face with three-pronged yellow pattern (in the middle and along inner eye margin). Scape, pedicel and flagellomeres ventrally yellow, darkened dorsally; mandible basally and labrum yellow; palpi brownish, lighter apicaly. Mesosoma completely black or with very reduced yellow stripe on pronotal collar. Fore and mid legs, including coxae and trochanters, yellow ventraly, black dorsaly, apical tarsomeres yellowish; hind leg predominantly black with brownish tarsi and spurs. Forewing clear spotted, veins brown, costal cell and stigma yellowish. Metasoma black with lateral yellow spots on T2 and apical stripe on S2; T1 often with very small lateral spots and T3 with reduced apical stripe.

Head ( Fig. 3 ). Head ratio H:W = 0.92×; POL:OOL = 0.94×; inner eye margins essentially parallel. Occipital carina well developed, reaching hypostomal carina but not merging with it. Antenna elongate, length ratio (inner view)—scape:F1:F2 = 1:1.14:0.9; F1 ratio L:W = 5.8×. Mandible with blunt tooth in apical third of inner margin. Frons and vertex microsculptured with fine dense punctation; gena, except narrow, finely pubescent area behind eye, with fine punctation on smooth background; clypeus finely punctate basally, with several large punctures mesally.

Mesosoma. Sternaulus poorly developed, mostly vestigial ( Fig. 6 ). Metapostnotum well separated from propodeum, with shallow medial furrow and lateral nearly parallel ridges, ridges terminating slightly before apex. Propodeal posterior surface with median furrow. Pronotal collar, mesonotum and scutellum with dense micropunctation and fine dense punctures; mesopleuron with inconspicuous microsculpture and fine dense punctures; metapleuron with sparse micropunctation, without ridges dorsoposteriorly; dorsolateral part of propodeum with dense, clearly visible punctures, sometimes forming short irregular wrinkles.

Wings. Venation typical for genus; hindwing media diverging slightly beyond cu-a.

Legs. Foretarsal rake well developed; rake setae not long, not spatulate, apical seta on basitarsus and second tarsomere distinctly shorter than two following tarsomeres combined.

Metasoma. T1 slightly elongate (dorsal view), ratio L:W = 1.18×, with distinct apical constriction. Apical constriction of T1 only with sparse punctures, without wrinkles. Pygidial plate broad, clearly edged, with sparse punctures.

Setation short, white; on propodeal side longer, 0.8–0.9× midocellar diameter, slightly curved, slightly sinuous; setae stout on clypeus, labrum, mandible and coxae.

Male (hitherto unknown). Body length 9.0– 10.6 mm. Coloration as female, but yellow pattern less developed. Clypeus with large median black spot, mandible black, flagellomeres light brown below, yellow pattern of fore and mid legs significantly reduced.

Head ( Fig. 4 ). Head ratio H:W = 0.89×; POL:OOL = 1.09×; inner eye margins essentially parallel. Occipital carina well developed, reaching hypostomal carina but not merging with it. Antenna elongate, length ratio (inner view)—scape:F1:F2 = 1:1.19:0.97; F1 ratio L:W = 3.9×. Other features as in female.

Mesosoma. Sternaulus poorly developed, mostly vestigial, but slightly more expressed than in female. Other features as in female.

Wings. Venation as in female.

Legs. Foretarsal rake absent.

Metasoma. T1 slightly elongate (dorsal view), ratio L:W = 1.28×, with distinct apical constriction. Apical constriction of T1 only with sparse punctures, without wrinkles. T7 triangular, rounded at apex, with dense punctation like on previous terga.

Setation similar to that of female.

Distribution. Japan (Hokkaido, Honshu, Kyushu); Russia (Kuril Islands: Kunashir)—new record.

Remarks. All records from the Asian mainland ( Korea and Primorsky Territory of Russia [=Ussuri region]) are based on Tsuneki (1963: 9, with question marks) and Tsuneki (1965: 29, “material from Ussuri reg. and Korea may belong to ssp. yamatonis ”). All subsequent authors refer to these articles, without citing the material (see Kim 2014: 423).

Figures

FIGURES 1–4. Lestiphorus yamatonis Tsuneki (from Kunashir Isl.): 1—habitus, ♀; 2—propodeum and metasomal base, dor- solateral view, ♀; 3–4—head, frontal view, ♀ (3), ♂ (4).

FIGURES 5–9. Lestiphorus. 5, 7–9—L. bilunulatus A. Costa (5, 7, 8—from Primorsky Terr., Russia, 9—fromAmur Prov., Russia); 6—L. yamatonis Tsuneki (from Kunashir Isl.); 5, 6—mesosoma, ventrolateral view, ♀; 7—metasoma, dorsolateral view, ♀; 8, 9—head, frontal view, ♀ (8), ♂ (9).