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Амурский зоологический журнал, 2024, т. XVI, № 1
Amurian Zoological Journal, 2024, vol. XVI, no. 1
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https://www.doi.org/10.33910/2686-9519-2024-16-1-184-189 http://zoobank.org/References/928EDBEC-86D7-42BB-B5A9-7EE34BA60904
UDC 595.763.33
Little known species of the Genus Oxytelus (Coleoptera, Staphylinidae) from Kamchatka
M. Yu. Gildenkov1^, O. I. Semionenkov
Smolensk State University, 4 Przhevalsky Str., 214000, Smolensk, Russia
Authors
Mikhail Yu. Gildenkov
E-mail: mgildenkov@mail.ru
SPIN: 9079-8238
Scopus Author ID: 8677040800
ResearcherlD: J-9690-2015
ORCID: 0000-0001-5752-1411
Oleg I. Semionenkov
E-mail: osemionenkov@yandex.ru
SPIN: 7501-8922
Scopus Author ID: 57194710756
ORCID: 0000-0003-0130-3321
Abstract. The article reports on the record of Oxytelus (Tanycraerus) jessoensis Bernhauer, 1907 from Kamchatka. It provides illustrations of its habitus, aedeagus and male sternite VIII. The article also describes and illustrates the differences between Oxytelus. jessoensis and the related species, namely, Oxytelus (Tanycraerus) laqueatus Marsham, 1802, Oxytelus (Tanycraerus) assingi Schulke, 2012 and Oxytelus (Tanycraerus) ruthenus Semionenkov & Gildenkov, 2022. Oxytelus jessoensis differs from O. assingi in the lighter coloration of the antennal base (segments 1-4) and mouthparts. The species is noticeably different from O. assingi and O. ruthenus in the structure of male abdominal sternite VIII and in the structure of the aedeagus parameres.
Copyright: © The Authors (2024). Published by Herzen State Pedagogical
University of Russia. Open access under Keywords: Coleoptera, Staphylinidae, Oxytelus jessoensis Bernhauer, 1907, CC BY-NC License 4.0. taxonomy, Russia, Kamchatka
Малоизвестный вид рода Oxytelus (Coleoptera, Staphylinidae)
с Камчатки
М. Ю. Гильденковн, О. И. Семионенков Смоленский государственный университет, ул. Пржевальского, д. 4, 214000, г. Смоленск, Россия
Сведения об авторах
Гильденков Михаил Юрьевич E-mail: mgildenkov@mail.ru SPIN-код: 9079-8238 Scopus Author ID: 8677040800 ResearcherlD: J-9690-2015 ORCID: 0000-0001-5752-1411 Семионенков Олег Игоревич E-mail: osemionenkov@yandex.ru SPIN-код: 7501-8922 Scopus Author ID: 57194710756 ORCID: 0000-0003-0130-3321
Аннотация. По материалам с Камчатки указывается Oxytelus (Tanycraerus) jessoensis Bernhauer, 1907. Проиллюстрирован хабитус, эдеагус и VIII стернит самца. Приводятся и проиллюстрированы отличия O. jessoensis от близких видов: Oxytelus (Tanycraerus) laqueatus (Marsham, 1802); Oxytelus (Tanycraerus) assingi Schulke, 2012 and Oxytelus (Tanycraerus) ruthenus Semionenkov & Gildenkov, 2022. Oxytelus jessoensis отличается от O. assingi более светлой окраской основания антенн (1-4 членики) и ротовых органов. Вид хорошо отличается от O. assingi и O. ruthenus строением VIII стернита брюшка самца и парамер эдеагуса.
Права: © Авторы (2024). Опубликовано Российским государственным педагогическим университетом им. А. И. Герцена. Открытый доступ на условиях лицензии СС БУ-ЫС 4.0.
Ключевые слова: Coleoptera, Staphylinidae, Oxytelus jessoensis Bernhauer, 1907, таксономия, Россия, Камчатка
Introduction
As noted earlier in (Gildenkov, Semionenkov 2023) a group of species with considerable similarity to Oxytelus (Tanycraerus) laquea-tus (Marsham, 1802) (Fig. 2) first moved into the focus of research as 'laqueatus-allied species' during the revision of the genus Oxytelus in China (Lu, Zhou 2012). In addition to O. laqueatus, the group included five more species: Oxytelus almorensis Cameron, 1930 [Pakistan, India], O. houomontis Ito, 1994 [Japan], O. jessoensis (Fig. 1) [Japan], O. robus-tus Schubert, 1906 [China (Beijing, Gansu, Sichuan), Pakistan, India] and O. tibetanus Bernhauer, 1933 [China (Sichuan, Xizang)]. The five species are close to O. laqueatus not only in the general habitus, structure of the head, pronotum and elytra, but also in the shape of the posterior margin of male abdominal sternites VII-VIII. In 2012, a new species Oxytelus assingi Schulke, 2012 was described from the Caucasus. It is close to O. laqueatus and the little-known species Oxytelus altaicus Kastcheev, 1999 (Schulke 2012), which, for this reason, was not considered by the Chinese scholars. In 2022, Oxytelus ruthenus Semi-onenkov and Gildenkov was described from the European part of Russia and Kamchatka. It is very close, including in the structure of the aedeagus (Figs 7, 8, 13, 14) (Semionenkov, Gildenkov 2022: 34, 35: Figs 2, 4, 5), to Oxyte-lus assingi. In our opinion, the species group close to O. laqueatus (Lu, Zhou 2012) can currently be divided into two groups based on the structure of the aedeagus. Thus, the first group includes species with wide parameres (see Fig. 6): O. laqueatus (Fig. 6) (Schulke 2012: 1660: Fig. 7; Gildenkov, Semionenkov 2023: 42: Fig. 4), O. robustus (Lu, Zhou 2012: 46: Fig. 17: M, N, O) and O. altaicus (Gildenkov, Semionenkov 2023: 42: Fig. 3). The second group includes species with narrow para-meres (see Figs 5, 7, 8): O. tibetanus (Lu, Zhou 2012: 54: Fig. 21: K, L, M), O. assingi (Figs 7, 13) (Schulke 2012: 1660: Fig. 4; Semionenkov, Gildenkov 2022: 35: Fig. 4), O. ruthenus (Figs 8, 14) (Semionenkov, Gildenkov 2022: 34, 35: Figs 2, 5), O. houomontis (Ito 1994: 43: Fig. 3: D) and O. jessoensis (Figs 5, 15). This group most likely includes O. almorensis, which was recorded in 2016 from Taiwan (Hayashi 2016). The structure of the aedeagus of a male from Taiwan (narrow parameres) became known
to us at the end of 2022 thanks to Yasuhiko Hayashi (Hayashi, personal communication, illustrated with photographs). However, we did not study the type material for O. almo-rensis.
Material and methods
The examined material is deposited in the following collections:
cMG — Mikhail Gildenkov's private collection, Smolensk;
cOS — Oleg Semionenkov's private collection, Smolensk.
The reported study is based on the standard methods of taxonomic research of insects. The preparations were made on an MBS-10 binocular microscope. The genital preparations were processed using 10% KOH and then fixed in Euparal. Photographs were taken with a Canon EOS 5D Mark III camera and a Canon MP-E 65 mm objective using the extended focus technology.
Oxytelus (Tanycraerus) jessoensis
Bernhauer, 1907
Material. 2$, 6 exs. 'Russia: Kamchatka, Bystrinsky Natural Park. Floodplain of the Kozyrevka River (Populus, fern, horsetail), 21.08.2015, leg. V. I. Lobanova' 'Oxytelus ass-ingi Schulke, 2012 V. B. Semenov det. 2015' Oxytelus jessoensis Bernhauer, 1907, det. M. Gildenkov, 2021' (cMG); 1$, 1? 'Russia: Kamchatka, Bystrinsky Natural Park. Flood-plain of Belaya River, near the stream (Alnus, Salix), 07.2015, leg. V. I. Lobanova' Oxytelus jessoensis Bernhauer, 1907, det. O. Semionen-kov, 2021' (cOS); 1$, 3 exs. 'Russia: Kamchatka, Bystrinsky Natural Park. Floodplain of the Kozyrevka River (Alnus, Salix), 21.08.2015, leg. V. I. Lobanova' Oxytelus jessoensis Bernhauer, 1907, det. M. Gildenkov, 2021' (cMG); 5 exs. 'Russia: Kamchatka, Bystrinsky Natural Park. Floodplain of the Kozyrevka River, hilltop (Picea, Betula), 07.2015, leg. V. I. Lobanova' Oxytelus assingi Schulke, 2012 V. B. Semenov det. 201' Oxytelus jessoensis Bernhauer, 1907, det. M. Gildenkov, 2021' (cOS); 1$, 2? 'Russia: Kamchatka, Bystrinsky Natural Park. Flood-plain of Bolshaya Romanovka River (Picea, fern, horsetail), 07.2015, leg. V. I. Lobanova' Oxytelus jessoensis Bernhauer, 1907, det. O. Semionenkov, 2021' (cOS).
12 3 4
Figs 1-8. Oxytelus (Tanycraerus) spp.: 1 — Oxytelus jessoensis Bernhauer, 1907, Kamchatka, male, dorsal view; 2 — Oxytelus laqueatus (Marsham, 1802), Smolensk Area, male, dorsal view; 3 — Oxytelus assingi Schülke, 2012, paratype, male, dorsal view; 4 — Oxytelus ruthenus Semionenkov & Gildenkov, 2022, holotype, male, dorsal view Scale bar: 1 mm. Aedeagus, ventral view: 5 — O. jessoensis, Kamchatka; 6 — O. laqueatus, Smolensk Area; 7 — O. assingi, paratype; 8 — O. ruthenus Semionenkov & Gildenkov, 2022, holotype. Scale bar: 0.25 mm Рис. 1-8. Oxytelus (Tanycraerus) spp.: 1 — Oxytelus jessoensis Bernhauer, 1907, Камчатка, самец, сверху; 2 — Oxytelus laqueatus (Marsham, 1802), Смоленская область, самец, сверху; 3 — Oxytelus assingi Schülke, 2012, паратип, самец, сверху; 4 — Oxytelus laqueatus (Marsham, 1802), голотип, самец, сверху. Масштаб: 1 мм. Эдеагус снизу: 5 — O. jessoensis, Камчатка; 6 — O. laqueatus, Смоленская область; 7 — O. assingi, паратип; 8 — O. ruthenus, голотип. Масштаб: 0,25 мм
ï WiH
9
10
11
14
15
Figs 9-15. Oxytelus (Tanycraerus) spp., Sternite VIII: 9 — O. jessoensis, Kamchatka; 10 — O. laqueatus, Smolensk Area; 11 — O. assingi, paratype; 12 — O. ruthenus, holotype. Right parameres, lateral view: 13 — O. assingi, paratype; 14 — O. ruthenus, holotype; 15 — O. jessoensis, Kamchatka. Scale bar: 0.25 mm Рис. 9-15. Oxytelus (Tanycraerus) spp., VIII стернит: 9 — O. jessoensis, Камчатка; 10 — O. laqueatus, Смоленская область; 11 — O. assingi, паратип; 12 — O. ruthenus, голотип. Правые парамеры сбоку: 13 — O. assingi, паратип; 14 — O. ruthenus, 12 голотип; 15 — O. jessoensis, Камчатка. Масштаб: 0.25 мм
Diagnosis. Like O. ruthenus, Oxytelus jessoensis differs from O. assingi in the lighter coloration of the antennal base (segments 1-4) and mouthparts (Schulke 2012; Semionenkov, Gildenkov 2022). O. jessoensis is noticeably different from them in the structure of abdominal sternite VIII (Figs 9, 11, 12); the differences between O. assingi and O. ruthenus are limited only to the structure of abdominal sternite VIII (Figs 11, 12). The width of the abdomen in O. assingi and O. ruthenus (Figs 3, 4) (Schulke 2012: 1660: Fig. 1) is slightly narrower than the width of the elytra, in contrast to O. jessoensis (Fig. 1), whosewidth of the abdomen noticeably exceeds the width of the elytra, both in males and females. However, the three species differ most reliably in the details of their parameres structure (Figs 13-15).
Some of the material we studied and presented in this article (see above), with the labels Oxytelus assingi Schulke, 2012 V. B. Se-menov det. 2015', was previously incorrectly identified and published (Lobkova, Lobanova, Semenov 2017) as O. assingi. Another part of the material from the same work (Lob-kova, Lobanova, Semenov 2017) was identified by us (Semionenkov, Gildenkov 2022) as O. ruthenus. This indicates that the species O. jessoensis, O. assingi and O. ruthenus are very difficult to distinguish, and given the cohabitation of O. jessoensis and O. ruthenus in Kamchatka, a detailed diagnosis of the species O. jessoensis may be relevant.
Discussion. Oxytelus (Tanycraerus) jessoensis Bernhauer, 1907 was described from Japan, from the island of Hokkaido (Jesso), vicinity of the Nemoro city, near Tokyo (Bernhauer 1907). For a long time it could only be found in catalogs. Koch (Koch 1932) gives the
characters of O. jessoensis in the identification key, comparing it with the widespread and well-known species Oxytelus (Tanycraerus) laqueatus (Marsham, 1802). According to Koch, the abdomen of O. jessoensis at its widest part is noticeably broader than the elytra, while it is noticeably narrower than the elytra in O. laqueatus (Figs 1, 2). Koch also notes significantly coarser punctation of the elytra and head in O. jessoensis (Koch 1932: 655). A fairly detailed redescription of the species O. jes-soensis was published in 1994 (Ito 1994). In addition to the description, Tateo Ito provides photographs of the holotype and original labels and a drawing of abdominal sternite VIII with characteristic features (Ito 1994: 42: Figs 1, 2). At the same time, the author notes that the species is known to him from a single specimen (male, holotype), with no data available for the female (Ito 1994: 42). The last mention of O. jessoensis is found in V. Kastcheev's identification key (Kastcheev 1999: 154). He compares O. jessoensis with O. laqueatus and Oxytelus (Tanycraerus) altaicus noting a much coarser and denser punctation of the head, pronotum and elytra in O. jessoensis.
The material from Kamchatka (see above) was identified as O. jessoensis (Figs 1, 5, 9, 15) based on the descriptions in (Bernhauer 1907; Ito 1994) and characteristic features in the structure of male abdominal sternite VIII (Ito 1994: 42: Fig. 2). Indeed, O. jessoensis (Fig. 1) has significantly coarser and denser punctation of the head, pronotum and elytra compared to the very similar body microsculpture of O. laqueatus (Fig. 2) and O. altai-
cus (Gildenkov, Semionenkov 2023: 42: Figs 1, 2). It is also confirmed that the width of the abdomen of O. jessoensis actually exceeds the width of the elytra (Fig. 1), in contrast to O. laqueatus (Fig. 2). The aedeagus of O. jessoensis was studied for the first time (Fig. 5). It should be noted that its structure is noticeably different from the structure of the aedeagus of O. laqueatus and O. altaicus (Fig. 6) (Gildenkov, Semionenkov 2023: 42: Figs 3, 4), with significantly more developed parameres (Fig. 6) (Gildenkov, Semionenkov 2023: 42: Figs 3, 4, 5, 6). At the same time, O. laqueatus and O. altaicus are very close species not only in the structure of the aedeagus, but also in the structure of male abdominal sternites VII (Gildenkov, Semionenkov 2023: 42: Figs 7, 8) and VIII (Fig. 10), which makes them different from O. jessoensis (Fig. 9). In coloration, coarse punctation of the head, pronotum and elytra, and structure of the aedeagus, O. jes-soensis is most similar to the recently described (Schülke 2012; Semionenkov, Gildenkov 2022) Oxytelus (Tanycraerus) assingi Schülke, 2012 (Figs 3, 7, 11, 13) and Oxytelus (Tanycraerus) ruthenus Semionenkov & Gildenkov, 2022 (Figs 4, 8, 12, 14).
Acknowledgements
We wish to express our gratitude to Kirill Makarov for taking the photographs (Moscow Pedagogical State University, Russia). The authors are grateful to Yasuhiko Hayashi (Kawanishi-shi, Japan) for the valuable information on the genitalia structure of Oxytelus almorensis Cameron, 1930.
References
Bernhauer, M. (1907) Zur Staphylinidenfauna von Japan. Verhandlungen der Kaiserlich-Königlichen
Zoologisch-Botanischen Gesellschaft in Wien, vol. 57, pp. 371-414. (In German) Gildenkov, M. Yu., Semionenkov, O. I. (2023) Oxytelus (Tanycraerus) altaicus Kastcheev, 1999 — a little known rove beetle species from Kazakhstan (Coleoptera: Staphylinidae: Oxytelinae). Kavkazskij entomologicheskij byulleten' [Caucasian Entomological Bulletin], vol. 19, no. 1, pp. 41-43. (In English) https://doi.org/10.23885/181433262023191-4143 Hayashi, Y. (2016) A new record of Oxytelus almorensis Cameron, 1932 (Coleoptera, Staphylinidae,
Oxytelinae) from Taiwan. Elytra, Tokyo, New Series, vol. 6, no. 1, p. 134. (In English) Ito, T. (1994) Notes on the species of Staphylinidae (Coleoptera) from Japan III. Descriptions of two new species of the genus Oxytelus Gravenhorst. Natural History Research, vol. 3, no. 1, pp. 41-46. (In English)
Kastcheev, V. A. (1999) Novye Oxytelinae (Coleoptera, Staphylinidae) iz Tsentral'noj Azii i Kazakhstana [New Oxytelinae (Coleoptera, Staphylinidae) from Central Asia and Kazakhstan]. Tethys Entomological Research, vol. 1, pp. 141-156. (In Russian) Koch, C. (1932) Eine neue mediterrane Oxytelus-Art. In: Livre du Centenaire. Paris: Société Entomologique de France, pp. 649-656. (In German)
Lobkova, L. E., Lobanova, V. I., Semenov, V. B. (2017) Stafilinidy (Coleoptera, Staphylinidae) Kronotskogo zapovednika i sopredel'nykh territorij Kamchatki. Dopolnenie 3 [Rove beetles (Coleoptera, Staphylinidae) of the Kronotsky Reserve and adjacent territories of Kamchatka. Suppl. 3]. Trudy Kronotskogo gosudarstvennogo prirodnogo biosfernogo zapovednika — Proceedings of the Kronotsky State Natural Biosphere Reserve, vol. 5, pp. 54-82. (In Russian) Schülke, M. (2012) Vier neue paläarktische Oxytelini (Coleoptera, Staphylinidae, Oxytelinae). Linzer
Biologische Beiträge, vol. 44, no. 2, pp. 1641-1666. (In German) Semionenkov, O. I., Gildenkov, M. Yu. (2022) New species of the Genus Oxytelus Gravenhorst, 1802 from Russia (Coleoptera: Staphylinidae: Oxytelinae). Russian Entomological Journal, vol. 31, no. 1, pp. 32-35. (In English) https://doi.org/10.15298/rusentj.31.L06 Lü, L., Zhou, H.-Z. (2012) Taxonomy of the genus Oxytelus Gravenhorst (Coleoptera: Staphylinidae: Oxytelinae) from China. Zootaxa, vol. 3576, no. 1, pp. 1-63. (In English) https://doi.org/10.11646/ zootaxa.3576.1.1
For citation: Gildenkov, M. Yu., Semionenkov, O. I. (2024) Little known species of the Genus Oxytelus (Coleoptera, Staphylinidae) from Kamchatka. Amurian Zoological Journal, vol. XVI, no. 1, pp. 184—189. https://www.doi. org/10.33910/2686-9519-2024-16-1-184-189
Received 12 January 2024; reviewed 26 March 2024; accepted 31 March 2024.
Для цитирования: Гильденков, М. Ю., Семионенков, О. И. (2024) Малоизвестный вид рода Oxytelus (Coleoptera, Staphylinidae) с Камчатки. Амурский зоологический журнал, т. XVI, № 1, с. 184-189. https:// www.doi.org/10.33910/2686-9519-2024-16-1-184-189
Получена 12 января 2024; прошла рецензирование 26 марта 2024; принята 31 марта 2024.
