Heteroptera: Belostomatidae) in Greece
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Ecologica Montenegrina 41: 56-61 (2021) This journal is available online at: www.biotaxa.org/em http://dx.doi.org/10.37828/em.2021.41.8 Further distributional records of Lethocerus patruelis (Stål, 1854) (Heteroptera: Belostomatidae) in Greece LEONIDAS-ROMANOS DAVRANOGLOU1 & IOANNIS KARAOUZAS2* 1 Department of Zoology, University of Oxford, OX1 3SZ, UK. E-mail: [email protected] 2Institute of Marine Biological Resources and Inland Waters, Hellenic Centre for Marine Research, Anavyssos, 19013, Attica, Greece. * Corresponding author: E-mail: [email protected] Received 24 March 2021 │ Accepted by V. Pešić: 6 April 2021 │ Published online 11 April 2021. Abstract Although the Indo-Eastern Mediterranean giant water bug Lethocerus patruelis (Stål, 1854) is Europe’s largest hemipteran and aquatic insect, its distribution in Greece has remained poorly understood. Only a handful of records exists from the Ionian Islands, Macedonia, Thrace, and isolated observations in Preveza (Epirus), Achaia (north-western Peloponnese) and the islands of Rhodes and Thasos. Using records from personal observations, biomonitoring data, online arthropod identification groups and museum collections, we expand the distribution knowledge of this species to Aetolia-Acarnania, Thessaly, southern Peloponnese, Samothraki, North Sporades and the Cyclades. We also include a large number of new localities in areas within its previously known range. Key words: Lethocerinae; Nepomorpha; true bugs; aquatic insects; social networks; biogeography. Introduction Belostomatidae are the most charismatic of the true water bugs (Nepomorpha), due to their large size (up to 120 mm) and their voracious predatory habits, feeding on a wide range of invertebrates, fish, turtles, and even birds (Matheson 1907; Ribeiro et al. 2018). The approximately 170 described species have a worldwide distribution, reaching their greatest diversity in the tropics (Schuh & Weirauch 2019). Europe’s sole belostomatid is Lethocerus patruelis (Stål, 1854), which in this continent is distributed in Albania, Bulgaria, Croatia, Greece, the Republic of North Macedonia, Montenegro, Serbia, and European Turkey (Grozeva et al. 2013; Polhemus 1995; Protić 1998; Perez Goodwyn 2006; Fent et al. 2011; Dulčić, et al. 2015). L. patruelis was also mentioned as present in Romania and doubtful in Hungary in Polhemus (1995), as well as present in the Romanian-Hungarian border in the map of Grozeva et al. (2013), without any associated citation. However, these records need verification, as subsequent checklists in these countries have not included any belostomatid (e.g. Boda et al. 2015). If L. patruelis indeed does occur in Romania, it will likely be found in the Danube Delta, or ports on the Romanian Black Sea coast, where they might be attracted by boat/ship lights. This species was recently recorded in Italy, likely reflecting a recent westward expansion (either natural or anthropogenic) (Bacchi & Rizzotti Vlach 2005; Cianferoni & Nardi 2013; Lo Ecologica Montenegrina, 41, 2021, 56-61 DAVRANOGLOU & KARAOUZAS Parrino 2019). In Greece, despite its large size and high dispersal capabilities, sightings of L. patruelis are scarce. Its distribution is largely unknown, comprising scattered, isolated records in the Ionian islands, Macedonia, Thrace, Epirus, north-western Peloponnese and the island of Rhodes [distribution summarized in Corsini-Foka et al. (2019), but also includes the records of Zimmermann (1982), which were not included in the latter study]. The present work represents the most comprehensive study on the distribution of L. patruelis in Greece. Using records from personal observations, biomonitoring data, online arthropod identification groups and museum collections, we significantly expand the distribution knowledge of this species with new locations across the country (Aetolia-Acarnania, Thessaly, southern Peloponnese, Samothraki, North Sporades and the Cyclades), and we provide numerous records from its hitherto known range. Material and Methods Records from personal observations, museum collections, from the biomonitoring database of the Institute of Marine Biological Resources and Inland Waters, Hellenic Centre for Marine Research (HCMR) and from photograph-based records uploaded by citizens on social media groups and on arthropod identification websites were included. Given that L. patruelis is the only belostomatid species found in Europe and possesses an unmistakable morphology, we are confident that our social media photograph-based identifications are correct. A very similar species is L. cordofanus Mayr, 1853, and can be separated by morphological characters that are hard to see in most photographs. However, this species is distributed primarily in central tropical Africa (Polhemus 1995), (with southernmost record in South Africa) reaching the Middle-East through the Nile River basin, with the northernmost record being in Israel (Novoselsky et al. 2018). We therefore doubt that any of the records presented here could represent this species; however further research is needed to exclude this possibility. Acronyms: Specimen depositories HCMR – Hellenic Centre for Marine Research NMPC – National Museum of Prague, Czech Republic Websites IFG – Identifications (Αναγνωρίσεις) Facebook Group (https://www.facebook.com/groups/330623170293210) IGC – Insects of Greece and Cyprus (https://www.facebook.com/groups/708035362603739) IN – iNaturalist (https://www.inaturalist.org/taxa/541422-Lethocerus-patruelis) Results New Records. Aetolia-Acarnania: Acheloos river valley, between Lake Ozeros and Stratos Dam, remains of L. patruelis in pellets of black kites [Milvus migrans (Boddaert, 1783)], II.2017, (Alivizatos pers. comm.); Agrinio, city outskirts, 23.V.2016 (IFG); Messolonghi lagoon, live specimen, 14.X.2016 (IFG). Central Greece: Lamia city centre, central square, live specimen captured by local residents, 6.X.2018 (IFG); Phthiotis, Karavomylos beach, 17.VI.2013 (IFG); Phthiotis, Parnassos Mt, 6 km north of Amfikleia, old camping area, 820 m. a.s.l., 24.IX.2014 (IFG); North Sporades islands: Skiathos, Koukounaries beach, dead specimen washed ashore, VI-VIII.2020 (Zogaris 2013); Skyros, 16.IX.2018 (IGC); Spercheios Delta, several live specimens eaten by white storks [Ciconia ciconia (Linnaeus, 1758)], remains found in their pellets, date uncertain, beginning of 2000 (Alivizatos pers. comm.). Epirus: Arta, live specimen collected in tube by local resident, 21.IX.2019 (IGC). Ionian Islands: Cephalonia, Argostoli seaside town, live specimen at house, 22.VI.2018 (IGC); Fiscardo seaside town, live specimen, 22.VIII.2020 (IN: Psomopoulou 2020); Kerkyra (Corfu): Kerkyra town, Kanoni area, near the airport, under street light, 39°36' N, 19°36' E, 10 m.a.s.l., 13.X.2018 (Karaouzas pers. obs.) Macedonia: Platamonas, near Platamonas beach, 23.XI.2020, (Efimeris Dimoprasion & Plistiriasmon 2020); Katerini: Katerini city centre: live specimen in backyard, 8.IX.2014 (IFG); live specimen at street light, 23.IX.2019 (IFG); Paralia Katerinis beach, live specimen walking at night 5.VIII.2018 (IFG); farmhouse in outskirts of Katerini, live specimen, 21.VII.2020 (IGC); Kavala: Kavala airport, live specimen walking on ground, 10.V.2014 (IFG); Kavala city centre, inside Ecologica Montenegrina, 41, 2021, 56-61 57 NEW RECORDS OF LETHOCERUS PATRUELIS FROM GREECE swimming pool, 27.VII.2020 (IGC); Kavala (unspecified location), live specimen walking on ground, 29.IX.2016 (IFG); Nea Peramos beach, live specimen, 18.X.2018 (IFG); Palio seaside village, live specimen walking on grass at night, 17.VIII.2019 (IGC); Zevgolatio, Strymonas River, 41°05´30.36’’ N, 23°17´34.90’’E, 22m, 24.IX.2015 (HCMR); Kerkini Lake, 1 live specimen caught in bird net, V.2016 (Alivizatos pers. comm.); Serres: Strymoniko village square, many specimens attracted to street lights, IX.2012 (IFG); Thessaloniki: Akti Salonikiou beach, Agios Nikolaos, live specimen on beach, 7.VI.2019 (IN: Novakova 2019); Angelochori lagoon, dead specimen, 21.XI.2016 (IFG); campus of Aristotle University, attracted to street light, 18.V.2016 (IGC); Epanomi beach, two specimens swimming at sea surface, VI. 2017 (IGC); Loutra Thermis, dead specimen, 2.X.2015 (IFG); Melissochori, Agias Praskevis, dead specimen, 2.X.2020 (IN: de Jager 2020); Nea Paralia Thessalonikis, 0 m. a.s.l., walking on pavement at night,19.IX.2018 (IGC); Nea Vrasna, dead specimen, 22.VII.2015 (IFG); Sochos, attracted to house light at night, 15.X.2020 (IFG); Thessaloniki, 1968, Arch. A. & Novák, P. legs., Kment det. (NMPC); Veria, city centre, Elias square, attracted to street light, 17.VIII.2017 (IGC). Peloponnese: Gythio, live specimen, 25.VIII.2019; Kalamata, city centre, attracted to street light, 37°2 '36.78"N, 22° 6' 46.86"E, 25 m. a.s.l., VII.2019 (IGC); Mt. Taygetos, Laconia, live specimen, 17.IX.2019 (IGC); North Aegean: Limnos Island, Kaspakas, 08.XI.2018 (Limnosfm100 2018); South Aegean (Cyclades): Amorgos island, dead specimen, 14.X.2018 (IN: Gavina 2018). Thessaly: Larissa, city centre, attracted to street light, 23.V.2017 (IFG). Thrace: Komotini, city centre, 21.VI.2020 (Xronos 2020); Rodopi, Xilagani, outside village church, 19.X.2018 (Tanea 2018); Samothraki Island, Vatos, 40°23’N, 25°36'E, 11 m a.s.l., dead specimen, XI.2012 (Skoulikidis pers. comm.); Evros, Lykofos, Lyra river, tributary of Evros River, 2 live specimens, IX.2015 (Zogaris pers. comm.); Kipoi village, at the Greek-Turkish border, live specimen walking on road, 19.VIII.2019 (IFG). Unconfirmed records. Due to its large size and