© Entomologica Fennica. 10 July 2019 New data on the distribution, biology and morphology of Asemum tenuicorne Kraatz, 1879 (Coleoptera: Cerambycidae), with new records from Poland Jerzy M. Gutowski & Jacek Kurzawa* Gutowski, J. M. & Kurzawa, J. 2019: New data on the distribution, biology and morphology of Asemum tenuicorne Kraatz, 1879 (Coleoptera: Cerambycidae), with new records fromPoland. Entomol.Fennica 30: 5771. https://doi.org/ 10.33338/ef.82920 We report the discovery of the pyrophilous species, Asemum tenuicorne (Cole- optera: Cerambycidae) in the Bia³owie¿a Primeval Forest (NE Poland) in 2009 and 2016. This species was previously known only fromSouthern Europe and one locality detached fromthe mainrange on the island of Gotska Sandön in Southern Sweden. Information on its northern spread and current distribution is summarized and critically analyzed and new data on its biology are provided. The morphology of A. tenuicorne adults was studied using 46 specimens from different localities and compared with 63 specimens of the widely distributed Asemum striatum. Differences between the two species are presented and illus- trated using external features, morphometric measurements, shape of the male copulatory organs and wing venation. J. M. Gutowski, Forest Research Institute, Department of Natural Forests, 17- 230 Bia³owie¿a, Poland; E-mail: [email protected] J. Kurzawa (*corresponding author), Sterlinga 2/10, 97-200 Tomaszów Mazowiecki, Poland; E-mail: [email protected] Received 30 July 2018, accepted 30 October 2018 1. Introduction rope is relatively well known (Bense 1995, Sama 2002, Löbl & Smetana 2010, Danilevsky 2017). The genus Asemum Eschscholtz, 1830 belongs to Two localities in Central and Northern Europe the tribe Asemini Thomson, 1860 in the sub- stand out in terms of species richness of sapro- family Spondylidinae Audinet-Serville, 1832. xylic beetles, including Cerambycidae: Gotska This genus comprises nine species distributed in Sandön (Sweden) and the Bia³owie¿a Primeval the Palaearctic region (A. arisanum Kano, 1930; Forest (Poland / Belarus) (Gutowski & Jaro- A. lucidulum Pesarini & Sabbadini, 1997; A. szewicz 2001, Ehnström& Axelsson 2002). punctulatum Blessig, 1872 and A. tenuicorne Asemum tenuicorne is generally found in south- Kraatz, 1879), Nearctic (A. australe LeConte, ern Europe but has also been known for many 1850; A. caseyi Linsley, 1957; A. glabrellum years in an isolated population on the island of Bates, 1892 and A. nitidum LeConte, 1873) and Gotska Sandön. Holarctic (A. striatum (Linnaeus, 1758)) (Monné On April 28, 2009, a ground-level fire oc- 2006, Löbl & Smetana 2010, Bezark 2016). curred over about 7 ha of a 140-year-old natural The distribution of longhorn beetles in Eu- forest stand in Bia³owie¿a National Park, affect- 58 Gutowski & Kurzawa ENTOMOL. FENNICA Vol. 30 Fig. 1. Burned area in the Bia³owie¿a Prime- val Forest where two specimens of Asemum tenuicorne were col- lected. ing the following habitats: moist forest (60.5% of (e.g. Institute of Systematics and Evolution of the affected area), swampy forest (24.5%), and Animals, Pol. Acad. Sci., Kraków; Museum and mixed coniferous forest (13.2%). This and other Institute of Zoology, Pol. Acad. Sci., Warszawa; researches were undertaken to compare changes Museumof Natural History, Wroc³aw Univer- in species diversity, abundance and composition sity, Wroc³aw) as well as private collections of of beetles (with particular reference to saproxylic the following entomologists: Pawe³ Górski (PG), species) as a result of disturbance caused by the Lech Karpiñski (LK), Roman Królik (RK), fire in the pine-spruce forest ecosystem. Activi- Andrzej Lasoñ (AL), Jerzy £ugowoj (J£), ties carried out in these study areas were limited Tomasz Olbrycht (TO), Rados³aw Plewa (RP), to observations and scientific research. Wojciech Szczepañski (WS), Marcin Szewczyk Starting just a few days after the fire, beetles (MS), Jan Tatur-Dytkowski (JT-D), including were collected fromthe fire-affected area (Fig. 1) the authors, J. M. Gutowski (JMG) and J. Kurza- and froma similarstratumof forest unaffected by wa (JK). the fire, using Moericke traps (Moericke 1951), In addition to the specimens from the barrier traps of the Netocia type (Piêtka & Bia³owie¿a Primeval Forest, the following A. Borowski 2015) and IBL-2 type traps (Borowski tenuicorne specimens from Italy and Greece were & Marczak 2015). The collections occurred in examined (b: black form, br: brown form): 20092011 and 20152018. In the course of these Italy: 1# (br) Toscana: Firenze, Crespino di studies, we collected two specimens of Asemum Marradi, leg. M. Benelli, ex larva: Pinus, tenuicorne, a new species record fromPoland. sfarfallato it: V 05[05.2005], coll. RP; 2$ (b, br) Here we present a critical analysis of informa- Emilia-Romagna: Casola Valsenio, ex. Pinus, tion in the literature on Asemum tenuicorne a lit- VI.2016, leg. Casadio, coll. LK; 1$ (br), 2# (br) tle-known cerambycid species, as well as new Siena, Monte Amiata, 13.II.2004, leg. Benelli data on its distribution, morphology and biology. M., coll. JK; 1# (b) Toscana, Firenze, Badia della Valle, 3.V.2010, leg. Benelli M., coll. JK; 2. Materials and methods 5$ (br), 8# (br), 7# (b) Toscana, Firenze, Casaglia, ex Pinus, 115.V.2010, leg. Benelli M., To examine as large number of specimens of A. coll. JK. tenuicorne as possible and to compare morpho- logical characters with the sympatric species, A. Greece: 1$ (br), 1$ (b) Thessaly, Mount Ossa, striatum, we searched the entomological collec- 1,300 ma.s.l., 39°50N, 22°42E, 31.V.2016, leg. tions of the most important institutions in Poland et coll. JK & WS; 3$ (br), 2$ (b), 1# (br), 3# (b) ENTOMOL. FENNICA Vol. 30 New data about Asemum tenuicorne 59 Fig. 2. Adult females. a.Asemum tenui- corne (Bia³owie¿a Fo- rest). b. A. striatum (Poland). Peloponnese, Taygetos mts., 1,086 m, 3 km SE CITOVAL-2 stereoscopic microscope with a Artemisia, 37°04N, 22°14E, 11.VI.2009, leg. special measuring eyepiece with an accuracy of MS, coll. JK, AL, J£ & MS; 1$ (b), 1# (br) 0.1 mm, and from photographs taken with a Wild Peloponnese, Taygetos: Neochori, 27.V.2010, Leica M8 microscope with a Nikon D7200 reflex leg. Martinù, coll. RP; 1$ (b), 1# (br) camera using the ToupView program. Photo- Peloponnese: Neochori, Ag. Nikolaos, 1,300 m, graphs of the wing venation for diagnostic pur- 28.V.2015, leg. M. Egger, coll. AL & RK; 1# poses were made immediately after wet dissec- (br) Peloponnese, [Taygetos mts.,] Ag. Vasi- tion of four specimens of each species. leios Artemisia, 13.VI.2009, leg. J. Kalisiak, Statistical calculations and charts were made coll. PG; 1$ (b) Ellada, [Peloponnese], around using MS Office Excel 2013, R 3.5.0 and PAST Ag. Petros, 19.V.2009, under burnt bark of Pinus 3.16 (Hammer et al. 2001). To compare differ- nigra Arn.,JT-Dleg.etcoll.;1#(b)Pelo- ences between species and between sexes within ponnese, Paleopanagia, 1415.VI.2006, leg. species we used Generalized Linear Mixed Martinù I., coll. JK. Model (GLMM) with a Gaussian distribution for the response variable. Metric features of both spe- All available specimens of A. tenuicorne (19$, cies were correlated with each other and were dif- 27#) and A. striatum (24$, 39#) were examined ficult to analyze in one model. Therefore, the and the following measurements taken: 1) the three most significant features were selected: length of the left and right elytra, 2) the width of body length, ratio of length and width of the the prothorax at its widest point, 3) the length of prothorax, and ratio of length and width of the the prothorax, 4) the combined maximum width elytra. The distribution of body lengths did not of the elytra and 5) the length of the body fromthe deviate fromnormality, whereas values for both apex of the mandibles to the posterior margin of ratio features were log-transformed prior to anal- the tergite VII. The measurements were made us- yses to achieve normality. The explanatory vari- ing two methods: directly, using a Carl Zeiss Jena ables were species and sex, both as a two-level 60 Gutowski & Kurzawa ENTOMOL. FENNICA Vol. 30 Table 1. Differential features of European species of genus Asemum. Asemum tenuicorne Asemum striatum Body slender: proportion of length to width Body broader: proportion of length to width of of elytral base on average 3.3 (Table 2) elytral base on average 3.7 (Table 2) Body flat in lateral view (especially elytra) Body convex in lateral view (especially elytra) Sculpture of elytra fine, not wrinkled; Sculpture of elytra coarse, wrinkled, transverse; transverse longitudinal costae less distinct elytron with 2–4 longitudinal costae Frons slightly depressed, without furrow Frons deeply depressed, with distinct bordered furrow Third, fourth and fifth segment of antennae Third, fourth and fifth segment of antennae distinctly longer than first segment of not longer than first segment of antennae antennae (Figs 2a, 3a) (Figs 2b, 3b) Third segment of antennae slender, 4.5 × Third segment of antennae thick, 2.5–3 × longer longer than width at apex (Figs 2a, 3a) than width at apex (Figs 2b, 3b) Antennal segments 3–9 almost parallel sided; Antennal segments 3–9 expanded at apex; base width of base and width of apex nearly broader than apex (Fig. 3b) equal (Fig. 3a) Pronotum less transverse: length to width 0.8 Pronotum distinctly transverse: length to width (Table 2, Fig. 10a), with gently rounded 0.7 (Table 2, Fig. 10b), laterally angularly sides, shape less variable widened, shape of pronotum variable Brown specimens with wide, light brown Brown specimens only rarely with light brown anterior margin of pronotum anterior margin of pronotum Pubescence of pronotum light, dense, long, Pubescence of pronotum black, sparse, short, recumbent erected Pronotum shining with sparse puncturation Pronotum with dense, dull, granular puncturation (Fig.