Hypothenemus margaritae Petrov and Shamaev, 2020

Petrov, A. V. & Shamaev, A. V., 2020, Description of a new Hypothenemus Westwood, 1834 species (Coleoptera: Curculionidae: Scolytinae) from South of Primorskiy Kray of Russia and South Korea, Russian Entomological Journal 29 (1), pp. 83-86 : 84-85

Hypothenemus margaritae Petrov and Shamaev , sp.n.

Figs 1–7 .

MATERIAL. Holotype, ♀ ( ZMM): RUSSIA: South Primorskiy Kray Khasan District, 10 km N from Kraskino , beetle raised from larvae, 7.I.2018, A. V. Shamaev ; Paratypes: same place, but emerged from 1.I.2018 till 2.V.2018, 20♀♀ (in APP and VNIIKR collection,

Moscow; ZIN RAS , St.Petersburg, Russia); South Korea 6 ♀♀ : Gyeonggi Province, Gunpo-Si, Hosu-ro, Mt. Surisan , 14.IV.2016, leg. S. Park (1 ♀) ; Gangwon Province, Inje-gun, Inje-eup, Gwandae-ri 13–19. VI.2013, leg. S. Park [labeled in Korean](1 ♀) ; Gangwon Province, Inje-gun, Buk-myeon, Hangye-ri , 17.IV–8. V.2018, leg. M.H. Lee (1 ♀) ; Gangwon Province, Goseong-gun, Geojin-eub, Geonbongsa-ro , 26. V.1993, leg. D.S. Gu (1 ♀) ; Gangwon Province, Chuncheon-si, Dong-myeon, Janghak-ri , 21.IV–17. V. 2011, leg. S. Park (1 ♀) ; Gyeongbuk Province, Yeongju-si, Pyeongeun-myeon, Gangdong-ri , 10. V.1997, leg. K.J. Hong (1 ♀) .

TYPE LOCALITY. Russia, South Primorskiy Kray .

DESCRIPTION. Female: body length 2.50 mm, 2.27 times as long as wide, body dark brown, covered with pale scales; antenna and legs yellowish brown ( Figs 1–4 ).

Head black, shining. Frons convex from epistoma to vertex, punctured by small points except smooth median area from epistoma to upper level of eyes, vertex with sparse large punctures; vestiture hair-like, short, sparse, except numerous long yellow setae on epistoma and lateral sides of frons ( Figs 1, 5 ). Eyes large, shallowly emarginated. Antennal funicle 5-segmented, club 2.0 times as long as wide, suture 1 straight, partly septate, suture 2 procurved and marked by setae ( Fig. 6 ).

Pronotum 0.88 times as long as wide, surface shining; sides moderately arcuate on basal half, rather narrowly rounded in front; basal margin and posterior third of lateral margin marked by a fine raised line; anterior margin armed by two large (in the middle) and two smaller (laterally) rounded serrations; summit at middle, anterior slope coarsely asperate, armed by 20–23 large rounded serrations, surface punctured by small sparse points; posterior area shining, surface punctured with numerous points; vestiture on anterior part of abundant erect setae, on posterior part with numerous hair-like setae and yellowish brown scales.

Elytra 1.54 times as long as wide, 2.12 times as long as pronotum; sides almost straight and parallel on basal twothirds, rather broadly rounded behind; striae 1 and 2 weakly impressed, all striae wide, punctures round, middle sized (diameter of each point equal in length to distance between punctures in rows), uniform from the base to apex,; interstriae on disc almost smooth, about 1.2 times as wide as striae, with very small punctures, not at all granulate. Declivity convex, moderately steep; striae as wide as interstriae, declivital strial punctures well-developed clear, all interstriae weakly elevated ( Fig. 7 ). Disc vestiture of rows of fine, rather short strial hairs, supplemented by some similar interstrial hair, and single straight rows of erect interstrial scales; each scale length equal to half of distance between rows; single straight rows of erect interstrial scales on declivity more abundant, length scales on declivity equals length of scales on disc.

Abdomen dark brown, vestiture of numerous hair-like pale setae.

Male unknown.

MEASUREMENT. Paratypes (females) 1.93–2.6 long, 2.27–2.28 times as long as wide, elytra 1.42–1.56 times as long as wide, 1.88–2.2 times as long as pronotum.

DIAGNOSIS. The new species is closely related to Hypothenemus interstitialis (Hopkins, 1915) , but can be distinguished by larger body size, number and form of serrations on the apical margin of pronotum and vestiture on elytral declivity.

BIOLOGY. The species was collected in sparse growth of trees on flat hills. The trees were spaced by 10 to 30 meters. Larvae and callow adults overwinter in brood galleries. The adult beetles were raised and obtained by A.V. Shamaev from the branches of Quercus dentata Thunberg, 1784 .

Along with the described species of bark beetle the branches were inhabited by Phymatodes (Poecilium) ermolenkoi Tsherepanov, 1980 ( Cerambycidae ) and Agrilus viridis L. ( Buprestidae ).

ETYMOLOGY. The new species is named in honor of A.V. Shamaev’s daughter Margarita Shamaeva.

ACKNOWLEDGEMENTS. We express our most sincere gratitude to Alexey Gusakov (Zoological Museum of Moscow University, Russia), Harald Schillhammer (Natural History Museum, Vienna, Austria) for providing access to the collections. The authors thanks Roger Beaver ( Thailand), Sangwook Park and Andrew Johnson ( USA), Mikhail Mandelshtam ( Russia) and Miloš Knížek ( Czech Republic) for consulting and information on Hypothenemus species. Special thanks are addressed to Andrew Johnson for information about specimens from South Korea. The research of the first author (A.V. Petrov) was supported by a grant from the Russian Fund for Basic Research (No. 17-04-00360).

Figures

Figs 1–7. Habitus and details of Hypothenemus margaritae sp.n., females: 1–4 — habitus; 5 — head; 6 — antenna; 7 — elytral declivity; 2 — holotype; 1, 4–7 — paratypes from South Primorie, Russia; 3 — paratype from South Korea; 1–2, 4–7 — photographs of A.V. Petrov; 3 — photograph of S. Park. Рис. 17. Габитус и детали строениЯ Hypothenemus margaritae sp.n., самки: 1–4 — внеШний вид; 5 — голова; 6 — усик; 7 — скат надкрылий; 2 — голотип; 1, 4–7 — паратипы иЗ Южного ПриморьЯ России; 3 — паратип иЗ Южной Кореи; 1–2, 4–7 — фотографии А.В. Петрова; 3 — фотографиЯ S. Park.