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First records of Leptoglossus occidentalis Heidemann, 1910 (Hemiptera: Heteroptera: Coreidae) in Latvia

Article

First records of Leptoglossus occidentalis Heidemann, 1910 (Hemiptera: Heteroptera: Coreidae) in Latvia

Abstract

The first records of Leptoglossus occidentalis Heidemann, 1910 (Hemiptera: Heteroptera: Coreidae) for Latvia are reported. Additional information on the findings is given.
Heteroptera Poloniae Acta Faunistica
vol. 15: 129130. Opole, 11 VIII 2021
ISSN 2083-201X
http://doi.org/10.5281/zenodo.5172913
Heteroptera Poloniae Acta Faunistica, vol. 15: 129130. Opole, 11 VIII 2021 ISSN 2083-201X
Short communication
First records of Leptoglossus occidentalis Heidemann, 1910
(Hemiptera: Heteroptera: Coreidae) in Latvia
TORSTEN VAN DER HEYDEN1* , UĢIS PITERĀNS2
1 Immenweide 83, D-22523 Hamburg, Germany; 2 The Latvian Museum of Natural History, Kr. Barona iela 4,
LV-1050 Rīga, Latvia
*corresponding author: tmvdh@web.de
Abstract. The first records of Leptoglossus occidentalis Heidemann, 1910 (Hemiptera: Heteroptera: Coreidae) for Latvia are re-
ported. Additional information on the findings is given.
Key words: true bugs, western conifer seed bug, distribution, new records, invasive species, Baltic states.
Recently, the highly dispersible Nearctic coreid Lepto-
glossus occidentalis Heidemann, 1910 was reported
from Lithuania (Karalius & Karaliūtė 2019) and Estonia
(van der Heyden 2021). The gap between these two
Baltic countries is closed in this note by reporting the
first records of the species from Latvia.
So far, five specimens of L. occidentalis have been
found in Latvia. Photographs of the specimens and spe-
cific data on the findings were uploaded to the online
database Dabasdati.lv:
1. - 03.10.2020, Salaspils city, Miera street (Lat. 56.
861800, Long. 24.365300), on curtains inside an apart-
ment, photographed by Lilija Vanaga.
2. - 23.01.2021, ~1 km W Kolka village (Lat. 57.
744700, Long. 22.570800), lying on the snow in a pine
forest, photographed by Mareks Ieviņš.
3. - 23.01.2021, ~1,2 km NW Kolka village (Lat. 57.
749400, Long. 22.569800), lying on the snow in a pine
forest, photographed by Mareks Ieviņš.
4. - 24.01.2021, ~1 km NW Virsīte village (Lat. 56.
350900, Long. 23.900600), lying on the snow in a mixed
forest, photographed by Valda Ērmane.
5. - 02.04.2021, between Sīkrags and Mazirbe villages
(Lat. 57.661500, Long. 22.262600), beaten from a Juni-
perus communis L. (Cupressaceae) bush in a pine forest,
leg. Mareks Ieviņš (Fig. 1).
The three specimens observed on 23.01.2021 and
24.01.2021 were found at air temperatures of 2–4° C,
seemingly ‘frozen’/still and not moving (Mareks Ieviņš
and Valda Ērmane, personal communication).
Fig. 1. Specimen of Leptoglossus occidentalis Heidemann, 1910
found between Sīkrags and Mazirbe villages photo by Mareks
Ieviņš.
The localities of the findings are marked in green in
a square map based on 10 km x 10 km grid cells (Fig. 2).
They might indicate that L. occidentalis is more wide-
spread in the western part of Latvia. Further research
might lead to more knowledge on this issue.
Fig. 2. Known distribution of Leptoglossus occidentalis Heide-
mann, 1910 in Latvia.
Heteroptera Poloniae Acta Faunistica, vol. 15: 129130. Opole, 11 VIII 2021 ISSN 2083-201X
130
Acknowledgements
We want to thank the above-mentioned observers for making
their findings and additional information available to the pub-
lic. Special thanks to Mareks Ieviņš for allowing us to use his
photo of L. occidentalis to illustrate this paper.
References
Karalius S., Karaliūtė A. 2019. First record of the inva-
sive western conifer seed bug Leptoglossus occiden-
talis (Heteroptera, Coreidae) in Lithuania. Lietuvos
entomologų draugijos darbai 3 (31): 1718.
van der Heyden T. 2021. First records of Leptoglossus
occidentalis Heidemann, 1910 (Hemiptera: Heter-
optera: Coreidae) in Estonia and Belarus. Heterop-
tera Poloniae Acta Faunistica 15: 56.
This work is licensed under a Creative Commons
Attribution 4.0 International License
http://creativecommons.org/licenses/by/4.0/
Received: 20 April 2021
Accepted: 30 July 2021
Article
The article presents new data on the distribution and acclimatization of an alien species of the American coniferous bug ( Leptoglossus occidentalis Heidemann, 1910) from the European part of Russia. This bug was discovered in the autumn of 2019 on the territory of the city of Voronezh in the Arboretum of the Voronezh State University of Forestry and Technologies. Currently, L. occidentalis spreads on the territory of Russia only in an urban environment, where it finds optimal environmental conditions (suitable temperature, humidity and shelter for winter locations). Surveys of a number of park and forest park zones, squares and separately growing coniferous trees conducted in 2019-2020 in Voronezh did not reveal the presence of this species. At the moment, in the conditions of the Voronezh region, the center of the spread of this bug is located only in the Arboretum of the Voronezh State University of Forestry and Technologies. In 2020, an increase in the number of the identified group of L. occidentalis was recorded. Further spread of the bug is predicted on the territory of Voronezh. At the moment, no danger to conifers in the European part of Russia from L. occidentalis has been identified and is not yet expected, but constant monitoring of the detected group is required.
First record of the invasive western conifer seed bug Leptoglossus occidentalis (Heteroptera, Coreidae) in Lithuania
  • S Karalius
  • A Karaliūtė
Karalius S., Karaliūtė A. 2019. First record of the invasive western conifer seed bug Leptoglossus occidentalis (Heteroptera, Coreidae) in Lithuania. Lietuvos entomologų draugijos darbai 3 (31): 17-18.