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Item A case of transportation of Cimex hemipterus (Fabricius, 1803) (Insecta, Hemiptera) in Bulgaria(Plovdiv University Press "Paisii Hilendarski", 2024-03-25) Georgiev, DilianDuring the period of 02-09.03.2024, the author and their family stayed in a hotel infested with bed bugs in Uroa village, Unguja Island, Zanzibar. Upon returning to Bulgaria (Hrishteni village, Stara Zagota city area), one specimen of Cimex hemipterus (Fabricius, 1803) was found alive in the luggage. This should be the first documented record of the tropical bed bug in Bulgaria, and the possibility of transfer via increased touristic visit in tropical destinations were briefly discussed.Item A new collection of Psocodea (Insecta) from Unguja Island (Zanzibar, Tanzania)(Plovdiv University Press "Paisii Hilendarski", 2024-03-30) Georgiev, DilianThe study presents a new collection of Psocodea (Insecta) from Unguja Island (Zanzibar, Tanzania), conducted during March 3rd to 9th, 2024. Despite recent efforts to explore Psocodea fauna in equatorial and tropical Africa, comprehensive studies in East Africa, particularly along the east coast and inland areas, remain limited. This research contributes to filling these gaps by documenting 16 species, including nine new records for the Zanzibar autonomic region and seven new records for Tanzania. Notably, one species (Nanopsocus sp.) may potentially be new to science.Item A new record of Hemidactylus turcicus (Linnaeus, 1758) (Reptilia: Gekkonidae) from Bulgaria(Plovdiv University Press "Paisii Hilendarski", 2025-01-28) Velikov, Ilian; Naumov, BorislavA single individual of Hemidactylus turcicus is reported from Sofia, Bulgaria. This is the first reliable registration of this species in the country. It is suggested that the individual observed was accidentally introduced to the site as a result of human activity.Item A potential Bio corridor for bears? New data on the occurrence of Ursus arctos (Linnaeus, 1758) in the Eastern Balkan Mountains(Plovdiv University Press "Paisii Hilendarski", 2024-07-01) Marinova, Pavlina; Kolev, Nikolay; Natchev, NikolayIn the present study we provide data on the presence of a Brown bear specimen in the Eastern Stara Planina (Eastern Balkan). We obtained camera-trap images and photographs of the footprints of bears from the region of Varbishki and Rishki passes (Varbishki Prohod and Rishki Prohod). The locations were positioned at over 100 km from the easternmost border of the core population of bears in the central Stara Planina. Our data indicate a potential bio corridor allowing at least for young bears to migrate east along the mountain.Item A record of import of the invasive snail Theba pisana (O. F. Müller, 1774) (Gastropoda: Helicidae) in Bulgaria(Plovdiv University Press “Paisii Hilendarski”, 2024-01-03) Georgiev, DilianThis is a short communication of a discovery of the invasive Mediterranean snail species Theba pisana among food products in a market in Bulgaria imported from Spain. A single live juvenile specimen was found among lettuce leaves. Later it was alive kept in a terrarium.Item Abundance and biomass of Cladocera (Crustacea) in Vaya Lake(Plovdiv University Press "Paisii Hilendarski", 2024-02-27) Nenova, Elena; Stoichev, StefanThe number and biomass of Cladocera in Vaya Lake during the period 2003 - 2007 was studied under the conditions of increased anthropogenic pressure. The total number of cladocerans by station and by species, as well as their biomass, was determined. A dendrogram of similarity in species and quantitative composition of Cladocera was made. St. 1 and St. 5 are distinguished by the equal and lowest abundance of D. magna, and the very similar and highest abundance of M. micrura. Stations 3, 4, 11, and 12 had the highest Cladocera abundances, which were mainly due to close D. longispina and M. micrura. St. 9, 8, 2 and 7 form one group with more than 83% similarity. They show similar abundances of D. pulex. The dendrogram of similarity in species composition and biomass for the cladocerans showed 75% similarity among all stations except st. 5, which clearly stands out with the lowest total biomass.Item Animal remains from the Late Byzantine settlement (4th-7th c. AD) Gradishteto near Gabrovo City (CN Bulgaria)(Plovdiv University Press "Paisii Hilendarski", 2024-11-25) Boev, ZlatozarA total 747 animal remains of 11 taxa have been established in the medieval (Late Byzantine) settlement (4th-7th c. AD) near Gabrovo City (Gabrovo Region, CN Bulgaria). Some wild mammals as Red deer, Roe deer and Wild boar were rarely hunted, while livestock breeding (cattle, pig, goat, sheep, horse and donkey) was the basic source of meat for the settlement’s inhabitants.Item Animal remains from the Monastery of Chargubilya Mostich in Veliki Preslav (10-12th c. AD) – NE Bulgaria(Plovdiv University Press "Paisii Hilendarski", 2025-01-15) Boev, ZlatozarA total 1653 animal remains of 18 taxa have been established in the medieval (10-12 c. AD.) Monastery of Chargubilya Mostich in Veliki Preslav (Shumen Region, CN Bulgaria). Some wild mammals as red deer, roe deer, wild boar and European edible dormouse were rarely hunted, while livestock breeding (cattle, pig, goat, sheep, horse, donkey and rabbit) was the basic source of meat for the settlement’s inhabitants.Item Butozania bulgarica (Kantardzhieva-Minkova, 1953) (Scarabaeidae: Melolonthinae) – little known and possibly endangered species(Plovdiv University Press "Paisii Hilendarski", 2024-09-19) Gradinarov, Denis; Petrova, YanaBalkan endemic species Butozania bulgarica (Kantardzhieva-Minkova, 1953) was found in several closely situated localities in the Radomir Valley (SW Bulgaria) after a period of more than 50 years lack of data. The species has not been found in most of the historical localities in Bulgaria during several years of targeted survey, and it seems that its distributional range in the country has significantly decreased after the species description.Item Characteristics of Crested Tinamou (Eudromia elegans Saint-Hilaire, 1832) (Aves: Tinamidae) eggs(Plovdiv University Press "Paisii Hilendarski", 2024-12-15) Lukanov, Hristo; Genchev, AtanasThe main characteristics of Crested Tinamou eggs, including shell colour characteristics in two age groups (young and old birds) were studied. The average value of the egg shape index was 73.23±0.51 with the average egg size of 50.13±0.47 mm/36.67±0.18 mm. The average egg weight of all eggs was 35.58±0.64 g, lighter in the young birds (P<0.001). The share of albumen: yolk: shell with shell membranes was 58.4%:32.2%:9.4%. Crested Tinamou eggshell is characterized by average values in the CIE L*a*b* colour system as follows: 51.62±0.51 (L*), -11.57±0.21 (a*), and 36.62±0.54 (b*) with an average shell color index (SCI**) of -13.19±0.4.Item Contribution to the study of the free-living freshwater nematode fauna of Neretva River (Bosna and Herzegovina)(Plovdiv University Press "Paisii Hilendarski", 2025-01-15) Stoichev, StefanHydrobiologycal studies of Neretva River were performed during the 2019. The present study provides the first information on free-living freshwater nematodes from the Neretva River. The identified species are new to the hydrofauna of Bosna and Herzegovina. In our study, we identified 8 species of freshwater free-living nematodes belonging to 7 genera. The identified species and genera are new to the hydrofauna of the Neretva River, They are also new to the hydrofauna of Bosna and Herzegovina.Item First finding of rare endemic species Cernosvitovia biserialis (Černosvitov, 1937) since 1967 year from Bulgaria(Plovdiv University Press "Paisii Hilendarski", 2024-06-17) Valchovski, HristoIdentifying the earthworm material recently collected from pre-Balkan hill zone resulted in discovered new record of rare Balkan endemic species from Cernosvitovia biserialis (Černosvitov, 1937) since 1967. This is the northern finding of the species from Bulgaria. The paper also provided information about distribution, zoogeography and ecology of this taxon.Item First record of Vadonia unipunctata makedonica Holzschuh, 1989 (Cerambycidae: Lepturinae) in Bulgaria(Plovdiv University Press "Paisii Hilendarski", 2024-02-23) Gradinarov, Denis; Petrova, YanaVadonia unipunctata makedonica Holzschuh, 1989 (Cerambycidae: Lepturinae) is reported from the Bulgarian part of Falakro Mts. The nominative subspecies V. unipunctata unipunctata (Fabricius, 1787) is also present in Bulgaria. Photographs of the beetles of both subspecies are provided.Item First study on the psocids (Insecta: Psocodea) of Rwanda(Plovdiv University Press "Paisii Hilendarski", 2024-09-12) Georgiev, DilianThis study presents the first investigation into the species diversity of psocids (Insecta: Psocodea) in Rwanda. Over a week-long period in July 2024, psocid specimens were collected from three distinct localities: Mount Kigali, Kitabi Village, and the shores of Lake Kivu. Eight species were identified, all of which are new records for Rwanda.Item Free-living freshwater nematodes in Vlasina Lake (Serbia, Pčina District, Surdulica Municipality)(Plovdiv University Press "Paisii Hilendarski", 2024-05-07) Stoichev, Stefan; Nenova, ElenaFor the first time, a short hydrofaunistic research of Vlasina Lake, was carried in Serbia, Pčina District, Surdulica Municipalityut. A total 18 free-living fresh water nematods species were found. Information on frequency of occurrence and frequency of dominance is given. The study gives first information on the free-living fresh water nematods of the Vlasina Lake. For the first time data are reported on free-living fresh water Nematoda from Serbia.Item How stressed are two populations of the Mediterranean mussels (Mytilus galloprovincialis Lamarck, 1819) from the Black Sea (Bulgaria)? - Stress on stress biomarker responses(Plovdiv University Press "Paisii Hilendarski", 2025-01-15) Yancheva, Vesela; Georgieva, Elenka; Stoyanova, Stela; Todorova, Borislava; Antal, Laszlo; Nyeste, KrisztianThis article aims to present the latest results on the stress on stress responses in farmed and wild mussels from Sozopol, Bulgaria, focusing on the autumn season of 2024. Additionally, we compare these findings with the results from the other three seasons.Item New locality of the invasive Monk parakeet Myiopsitta monachus (Boddaert, 1783) in Greece(Plovdiv University Press "Paisii Hilendarski", 2024-05-11) Boev, ZlatozarAn adult individual of the Monk parakeet has been recorded in the City of Piraeus (SE Greece), a new unknown so far locality of the species.Item On the diversity of the earthworms (Lumbricidae) from the Rhodope Mts in Bulgaria(Plovdiv University Press "Paisii Hilendarski", 2024-11-22) Valchovski, Hristo; Teofilova, TeodoraThe research is a contribution to the knowledge of the earthworm diversity from the Western Rhodope Mts (Bulgaria). In this study, are presented new records of the rare Balkan endemic species Dendrobaena balcanica (Černosvitov, 1937). The paper also provides information about distribution, zoogeography and ecology of earthworm species from the mountain.Item On the validity of the genus Strandzhia Georgiev & Glöer, 2013 (Gastropoda: Bythinellidae)(Plovdiv University Press "Paisii Hilendarski", 2024-07-02) Georgiev, Dilian; Gloer, PeterThe genus Strandzhia Georgiev & Glöer, 2013 (Gastropoda: Bythinellidae) was described from the Strandzha Mountain area in southeastern Bulgaria, with its type species, S. bythinellopenia Georgiev & Glöer, 2013. The species was initially found in a spring near the village of Mladezhko, coexisting with Bythinella dedovi (Glöer & Georgiev 2011). This article addresses the critique by Jaszczyńska et al. (2024), who question the validity of the genus Strandzhia based on two key points: the examination of male specimens from the type locality revealing a penis morphology typical of the genus Grossuana Radoman, 1983, and the sequencing of these specimens confirming their identity with Grossuana. They consequently question the expertise of the original authors regarding penis morphology, concluding the genus is invalid. However, our studies involved dissecting nine male specimens of Strandzhia, confirmed the reported penis morphology. We assert the validity of the genus Strandzhia and the existence of S. bythinellopenia at its type locality, alongside Bythinella and Grossuana species. Future genetic studies are essential for specimens exhibiting the characteristic penis morphology of Strandzhia.Item One more “Asian” psocid (Insecta: Psocodea) found in Africa?(Plovdiv University Press "Paisii Hilendarski", 2024-02-10) Georgiev, DilianThe study presents new findings of Peripsocus cf. constrictus Thornton & Wong, 1968, in Uganda, near Buvi village, along the shores of Lake Victoria. Specimens were collected on July 30th, 2022, from a swampy area with bushes, palms, and various hygrophytes. A total of 12 female specimens were collected by beating the vegetation and stored for further analysis. The species P. constrictus was previously described based solely on a male specimen from Southeast Asia, so its identification based on females from Africa remains uncertain.