First record of Cylindrotoma distinctissima (Meigen, 1818) from Serbia and new data on the occurrence of Cylindrotomidae (Diptera) in Bulgaria and Romania

: Here we present the first records of Cylindrotoma distinctissima distinctissima (Meigen, 1818) from Serbia, which represents a new family (Cylindrotomidae, Diptera) to the dipteran fauna of the country. Additionally, new records on this species are given from Bulgaria and Romania. New records of two other rare species of Cylindrotomidae, i.e. Diogma glabrata (Meigen, 1818) and Triogma trisulcata Schummel, 1829) are listed from Romania.


INTRODUCTION
Cylindrotomidae or long-bodied crane flies are a small diptera family, within Tipuloidea.Currently, 70 recognized species are known worldwide, from which eight species are reported from West Palaearctic (Paramonov 2005, Oosterbroek 2018, Salmela 2013).Most of the European species only occur in the northern part of Europe, nevertheless Cylindrotoma distinctissima distinctissima (Meigen, 1818) is the only species that is also reported from the Balkan region (Oosterboek 2017).Presence of Diogma glabrata (Meigen, 1818) and Triogma trisulcata (Schummel, 1829) is less possible in this area.
During a trip in Serbia we collected seven Cylindrotomidae specimens in Kopaonik Mountains, which represent the first records of the family in Serbia.Additional records of long-bodied crane fly species are listed from Bulgaria and Romania.
MATERIAL AND METHODS Specimens were collected using sweep nets and were stored in 96% ethanol (four specimens) or pinned (three specimens) and deposited in Diptera Collection of the Faculty of Biology and Geology, Babeş-Bolyai University, Cluj-Napoca, Romania (DCBBU).The morphological characteristics of the male terminalia were examined after macerated in KOH 10%.The photos were taken using Olympus SZ61 stereomicroscope equipped with a Canon 650D camera and an LM Digital SLR Adapter (Micro Tech Lab, Austria).Layer photos were combined using free version of Zerene Stacker (http://zerenesystems.com/cms/stacker).Date format: day, month, year.All collection data are available on the TransDiptera Online Database (Kolcsár et al. 2018).Habita t.The specimens were collected along small brooks in spruce (Picea abies) dominated forest in Serbia, they were flown close to the ground (15-20 cm) or rest in ferns close to the brook (Fig. 6).
Presence of C. distinctissima is probable in Kosovo since the specimens were collected close to the Serbian-Kosovo border, and the Kopaonik Mountains are continuing in the territory of Kosovo.Furthermore the species occurrence in Greece and Republic of Macedonia is also probable since the specimens were collected just a few kilometre from Greek-Bulgarian and Macedonian-Bulgarian borders (Fig. 7).
Diogma glabrata and Triogma trisulcata are rare species in Central and Southern parts of Europe.Only a few records are known from Carpathians (Fig. 8).All specimens collected near small brooks.