Ecologica Montenegrina 44: 53-56 (2021) This journal is available online at: www.biotaxa.org/em http://dx.doi.org/10.37828/em.2021.44.7

First record of Pseudostyphlus pillumus (Gyllenhal, 1835) (Coleoptera, Curculionidae) from Altaiskii Krai, Western Siberia ()

ANDREI A. LEGALOV1,2,3*

1 Institute of Systematics and Ecology of Animals, SB RAS, Frunze street 11, Novosibirsk, 630091, Russia 2 Altai State , Lenina 61, , 656049, Russia 3 Tomsk State University, Lenina Prospekt 36, 634050 Tomsk, Russia * Corresponding author. E-mail: [email protected]

Received 11 July 2021 │ Accepted by V. Pešić: 30 July 2021 │ Published online 2 August 2021.

Abstract The first find of Pseudostyphlus pillumus (Gyllenhal, 1835) (Curculionidae: Curculioninae: Ellescini: Styphlina) from Altaiskii Krai, Western Siberia is recorded. It is the most eastern find of this species. The redescription of Pseudostyphlus pillumus is given. A key for identifying genera of Styphlina from Siberia is completed.

Key words: Biodiversity, Curculionoidea, Curculioninae, Styphlina, new record, Siberia.

Introduction

The subtribe Styphlina is a small monophyletic group of the tribe Ellescini differs from other subtribes by the eyes located towards bottom of the head (Legalov 2021). Nine Recent genera belong to this subtribe (Alonso-Zarazaga et al. 2017). Diversity centre of Styphlina is in the Western Palaearctic. Paraphilernus bilunulatus (Desbrochers des Loges, 1870), Philernus cretaceous Korotyaev, 1979, Ph. farinosus (Gebler, 1829), Pseudostyphlus pillumus (Gyllenhal, 1835) and Styphlus orthochaetinus (Reitter, 1916) were recorded from Siberia (Legalov 2020; Legalov and Reshetnikov 2021). Pseudostyphlus pillumus is found on the steppe bank of the Kizikha River from Rubtsovsky District of Altaiskii Krai (Fig. 3). It was known in Souhern Ural (Sverdlovsk region, Chelyabinsk region) and Western Siberia (Tyumen region) (Filimonov 2012; Sergeeva and Dedyukhin 2019; Legalov 2021). This is the first record from the southeast of Western Siberia and the easternmost find of this species.

Material and methods

Studied specimens of Styphlina are kept in the ISEA – Institute of Systematics and Ecology of Animals (Russia: Novosibirsk), Zoological Institute RAS (Saint-Petersburg) and the private collection of S.V. Reshetnikov (Novosibirsk).

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FIRST RECORD OF PSEUDOSTYPHLUS PILLUMUS FROM ALTAISKII KRAI

Descriptions, photographs and body measuring were performed using a Zeiss Stemi 2000-C dissecting stereomicroscope. The terminology of weevil body is according to Lawrence et al. (2010). The systematics of studied taxa are based on Alonso-Zarazaga et al. (2017) and Legalov (2021).

Systematics

Insecta: Coleoptera: Curculionidae: Curculioninae: Ellescini: Styphlina Genus: Pseudostyphlus Tournier, 1874

Species: Pseudostyphlus pillumus (Gyllenhal, 1835) (Figs. 1-2)

Material: 1 female (ISEA), RUSSIA, Altaiskii Krai, District, NW of Novovoznesenka, env. Kizikha River, 51,578° N, 81,659° E; 13.VI.2021, A. Legalov.

Figure 1. Pseudostyphlus pillumus, female, habitus, dorsal view. Scale bar 1.0 mm.

Description. Body dark-brown, covered with wide appressed light scales. Rostrum, antennae and legs red- brown. Even elytral interstriae with decumbent scales. Rostrum about 1.5 times as long as pronotum, subcylindrical, 3.5-3.6 times as long as wide at apex, weakly curved, with longitudinal carina, punctate.

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LEGALOV

Antennal scrobes directed to base of rostrum, close located to lower edge of rostrum. Eyes quite large, not protruding from contour of head, located towards bottom. Forehead flattened, punctuate, wider than width of rostrum basally, distinctly separated from rostrum. Temples shorter than eye. Vertex convex, punctate. Head widened behind eyes. Antennae inserted behind middle of rostrum. Scape long, not reaching eye. Antennomeres 2 and 3 conical. Antennomere 2 about 1.9-2.0 times as long as wide in apex. Antennomere 3 shorter and narrower than antennomere 2. Antennomeres 3 and 4 suboval. Antennomere 4 shorter than antennomere 3. Antennomeres 5-8 rounded. Antennomere 8 weakly transverse, wider than antennomere 7. Antennal club compact. Pronotum campanulate, about 1.2 times as long as wide at apex, about 0.9 times as long as wide in middle and at base, with convex sides. Maximal wide before middle. Disk flattened, punctate. Scutellum small, flat, semi-oval. Elytra about 1.8 times as long as wide at base, about 1.5 times as long as wide at middle, about 2.8 times as long as wide at apical fourth, 2.8 times as long as pronotum. Humeri distinct. Stria 9 long, not merging with stria 10 near level of metacoxa. Interstriae wide, weakly convex. Interstriae 3, 5 and 7 more convex. Prosternum punctate, without impression. Precoxal portion of prosternum subequal in length to procoxal cavity. Procoxal cavities contiguous. Postcoxal portion of prosternum two times shorter than precoxal potrion. Metanepisternum quite narrow. Metaventrite 1.7 times as long as length of metacoxal cavity, flattened. Abdomen flattened, densely punctate. Abdominal ventrite 1 slightly longer than metacoxal length. Ventrites 1, 2 and 5 subequal in length. Ventrites 3 and 4 equal in length. Ventrite 3 0.6 times as long as ventrite 2. Procoxae large, conical. Mesocoxae narrowly separated. Metacoxae transverse. Femora thickened, without tooth. Tibiae almost biconcave, with distinct uncus. Tarsi quite long. Tarsomere 1 conical. Tarsomere 2 wide-conical. Tarsomere 3 wide-bilobed. Tarsomere 5 elongate. Claws free, without teeth. Length of body (without rostrum): 2.9 mm. Length of rostrum: 1.0 mm.

Figure 2. Pseudostyphlus pillumus, female, habitus, lateral view. Scale bar 1.0 mm.

Distribution. Europe, Caucasus, Asia Minor, Kazakhstan, Western Siberia (Fig. 3).

Key to genera of the subtribe Styphlina from Siberia

1. Elytra with flattened humeri 2 - Elytra with distinct humeri 3 2. Body covered with thick wide scales Philernus Schoenherr, 1835 - Body covered with narrow decumbent light scales Styphlus Schoenherr, 1826 3. Rostrum without carina. Forehead not separated from rostrum by Paraphilernus Desbrochers groove des Loges, 1892 - Rostrum with median carina. Forehead distinctly separated from Pseudostyphlus rostrum

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FIRST RECORD OF PSEUDOSTYPHLUS PILLUMUS FROM ALTAISKII KRAI

Figure 3. Distribution of Pseudostyphlus pillumus in Western Siberia. Red circle – new record.

Acknowledgements The author thanks Dr. Boris A. Korotyaev (Russia: Saint-Petersburg) for the opportunity to study comparative material deposited in the Zoological Institute RAS, and anonymous reviewers for the valuable comments that improved the manuscript.

References

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