Acta Zoologica Academiae Scientiarum Hungaricae 67 (4), pp. 301–311, 2021

Title: Two new species of oribatid mites of the genus Xenillus (Acari, Oribatida, Liacaridae) from Bolivia

Authors: Sergey G. Ermilov1 and Josef Starý2

Authors' addresses: 1Tyumen State University, Institute of Environmental and Agricultural Biology (X-BIO), Lenina str. 25, 625000 Tyumen, Russia; E-mail:
2Biology Centre v.v.i., Czech Academy of Sciences, Institute of Soil Biology, Na Sádkách 7, 370 05 České Budějovice, Czech Republic; E-mail:

Abstract: Two new species of oribatid mites of the genus Xenillus (Oribatida, Liacaridae) are described from leaf litter in a rain forest in Bolivia. Xenillus pseudobolivianus sp. n. is similar to X. bolivianus and X. neonominatus in the morphology of lamellar cusp, length of bothridial and interlamellar setae and length and morphology of dorsal notogastral setae, but differs from both by the morphology of bothridial head and interlamellar and notogastral setae, the ornamentation of the notogaster, and the different length of some notogastral setae. Xenillus amboroensis sp. n. is similar to X. amazonensis, X. disjunctus, X. diversisetosus, X. fecundus, X. longipes, and X. ornatus in the morphology of bothridial seta, but differs from all by the morphology of lamellar cusp, the placement of the lamellar seta, and the different length of some notogastral setae.

Key words: Oribatida, Bolivia, taxonomy, morphology.

DOI: 10.17109/AZH.67.4.301.2021

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Acta Zoologica Academiae Scientiarum Hungaricae 67 (4), pp. 313–340, 2021

Title: Contributions to the taxonomy and biogeography of the genus Dichagyris (subg. Dichagyris) Lederer, 1867 (Lepidoptera, Noctuidae, Noctuinae)

Authors: Zoltán Varga1, Gábor Ronkay2 and László Ronkay2,3

Authors' addresses: 1Department of Evolutionary Zoology and Human Biology, University of Debrecen, H-4032 Debrecen, Egyetem tér 1, Hungary; E-mail:
2Heterocera Ltd; H-1137 Budapest, Szent István krt 4, Hungary; E-mail:
3Hungarian Natural History Museum, H-1088 Budapest, Baross utca 13, Hungary; E-mail:

Abstract: The taxonomically important characters and subgeneric subdivision of Dichagyris are presented with several historical and nomenclatural considerations. Subdivision of D. vallesiaca is revised based on the type material of the known subspecies. The D. psammochroa group is revised, with description of a new species, D. kurbatskyi from Kazakhstan, and one new subspecies, D. psammochroa kopetdaghimena from the Kopet-Dagh massif. The D. taftana group is revised, with the description of a new species (D. guentereberti from Afghanistan) and two new subspecies (D. taftana elborsasta and D. taftana safavida, from different areas of Iran). The eastern sister species of D. humilis, D. hypotacta from Afghanistan and Pakistan, is described. Major phylogenetic clades of Dichagyris s. str. are associated to western Palaearctic and/or Central Asiatic mountainous regions. Core areas of allopatric speciation of Dichagyris s. str. are discussed with taxonomic considerations and outlook on the subgenera Yigoga and Albocosta, as well.

Key words: species groups, lectotype designations, new species, new subspecies, vicariance, allopatric speciation, Holarctic, Sino-Himalayan, xeromontane.

DOI: 10.17109/AZH.67.4.313.2021

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Acta Zoologica Academiae Scientiarum Hungaricae 67 (4), pp. 341–347, 2021

Title: New species of Arge Schrank, 1802 (Hymenoptera, Argidae) from Turkey

Authors: Emin Kaplan1 and Attila Haris2

Authors' addresses: 1Bingöl University, Faculty of Agriculture, Department of Plant Protection, Bingöl, Turkey; E-mail:
2Ripl-Rónai Municipal Museum, Kaposvár, Hungary; E-mail:

Abstract: Arge yildirimi Haris et Kaplan sp. n. is described from Turkey, Diyarbakir Province and compared to Arge pectoralis (Leach, 1817) and Arge frivaldszkyi (Tischbein, 1852).

Key words: Hymenoptera, Argidae, Arge yildirimi sp. n., Diyarbakır, Turkey.

DOI: 10.17109/AZH.67.4.341.2021

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Acta Zoologica Academiae Scientiarum Hungaricae 67 (4), pp. 349–366, 2021

Title: New and little known species of moth flies (Diptera: Psychodidae: Psychodinae) from Nicaragua

Authors: Jan Ježek1, Jozef Oboňa2, François Le Pont3, Peter Manko2 and Jean-Michel Maes4

Authors' addresses: 1National Museum, Department of Entomology Cirkusová 1740, CZ-193 00 Praha 9 – Horní Počernice, Czech Republic; E-mail:
2University of Prešov, Faculty of Humanities and Natural Sciences, Department of Ecology 17. novembra 1, SK-081 16 Prešov, Slovakia; E-mails:; 3Boulevard Aristide Briand 95, Montreuil Sous Bois, F-931 00, France; E-mail:
4Museo Entomológico, León, Nicaragua. E-mail:

Abstract: The male of a new species Arisemus venustus sp. n. from Nicaragua, the Cerro Musun Natural Reserve, is described. Arisemus atrasetus (Rapp, 1945) and Platyplastinx tango Quate et Brown, 2004 (Diptera: Psychodidae: Psychodinae) from Nicaragua are redescribed and illustrated based on male morphological characters.

Key words: Central America, Nicaragua, non-phlebotomine moth flies, taxonomy, faunistics, new species, Maruinini, Setomimini.

DOI: 10.17109/AZH.67.4.349.2021

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Acta Zoologica Academiae Scientiarum Hungaricae 67 (4), pp. 367–376, 2021

Title: Selected life history traits of Leptaxis simia (Gastropoda: Hygromiidae) established in the laboratory

Authors: Elżbieta Kuźnik-Kowalska1, Robert A. D. Cameron2,3 and Małgorzata Proćków4

Authors' addresses: 1Department of Invertebrate Systematics and Ecology, Institute of Environmental Biology, Wrocław University of Environmental and Life Sciences, Kożuchowska 5b, 51-631 Wrocław, Poland; E-mail:
2Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, United Kingdom
3Department of Zoology, Natural History Museum, London SW7 5BD, United Kingdom; E-mail:
4Museum of Natural History, University of Wrocław, ul. Sienkiewicza 21, 50-335 Wrocław, Poland; E-mail:

Abstract: Among ten adult specimens of the Madeiran endemic land snail Leptaxis simia (Férussac, 1832) (Gastropoda: Hygromiidae), harvested from their natural environment, kept in the laboratory, a single clutch of 110 eggs was reared, and the mortality, growth and reproductive capacity of hatchlings over a 1240-day period were monitored. Of 70 hatchlings, 34 survived to complete shell growth at around 640 days. Growth was rapid, and mortality high in the early stages; growth slowed, and mortality was very low as the full size was approached. Snails kept singly failed to lay any eggs. Among those with potential mates, only three clutches were produced, one of which yielded no hatchlings. Clutches were produced at least five months after shell growth was complete. Mortality increased sharply after the onset of sexual maturity, and the oldest snail survived for three and a half years. The apparently very strictly semelparous mode of reproduction, delayed sexual maturity and a relatively long period of juvenile growth are discussed in relation to other species and to the practical problems of rearing potentially endangered species in captivity.

Key words: endemic, delayed maturity, growth rate, reproduction, life history traits, Leptaxis simia, Gastropoda, Hygromiidae.

DOI: 10.17109/AZH.67.4.367.2021

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Acta Zoologica Academiae Scientiarum Hungaricae 67 (4), pp. 377–401, 2021

Title: Comparison of Ostracoda (Crustacea) species composition between lakes and streams at high elevations in Turkey

Authors: Mehmet Yavuzatmaca

Authors' addresses: Bolu Abant İzzet Baysal University, Faculty of Arts and Science, Department of Biology, Gölköy 14280, Bolu, Turkey; E-mail:;

Abstract: Ostracods are one of the most suitable organisms because of their ecological and morphological preferences for habitat types to study the diversity between streams and lakes. In this study, 24 streams and 16 lakes were sampled in 2019 to evaluate the species compositions between streams and lakes. Environmental heterogeneity in the sense of the physico-chemical variables was found among the habitats. 24 of the 29 species with 923 individuals were found in the lakes when 13 species with 898 individuals were found in the streams. Eight species were common in both habitat types. Species contributing about 70.81% to the significant differences in the species composition between the habitats showed cosmopolitan characteristics. Species variation among the replicates of lakes was higher than streams. Results indicated that the species composition was probably associated to dissolved oxygen and electrical conductivity in lakes and streams, respectively. Overall, results suggested that the determination of influential local factors (e.g., dissolved oxygen, electrical conductivity) in different aquatic bodies can provide important contributions to the estimation of which habitat types can be chosen by species and the use of species as bioindicators.

Key words: elevational range, lotic and lentic, benthonic and nektonic, environmental heterogeneity, cosmopolitan species, Ostracoda, Crustacea.

DOI: 10.17109/AZH.67.4.377.2021

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Acta Zoologica Academiae Scientiarum Hungaricae 67 (4), pp. 403–415, 2021

Title: Geographic isolation created distinct pelage characters in Finlayson’s squirrel on isolated island offshore of the Indochina Peninsula in Central Vietnam

Authors: Tu Ngoc Ly1,2, Son Truong Nguyen1,3*, Masaharu Motokawa4, Duong Thuy Vu1, Hai Tuan Bui3,5, Phuong Huy Dang1 and Tatsuo Oshida6*

Authors' addresses: 1Department of Vertebrate Zoology, Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Street, Hanoi, Vietnam; E-mails:;;
2Center of Science and Technology, Hanoi Metropolitan University, 98 Duong Quang Ham, Caugiay, Hanoi, Vietnam; E-mail:
3Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Caugiay, Hanoi, Vietnam; E-mail:;
4The Kyoto University Museum, Kyoto University, Kyoto 606-8501, Japan; E-mail:
5Vietnam National Museum of Nature, Vietnam Academy of Science and Technology, 18 Hoang Quoc Street Hanoi, Vietnam; E-mail:
6Laboratory of Wildlife Biology, Obihiro University of Agriculture and Veterinary Medicine Obihiro 080-8555, Japan; E-mail:
*Co-corresponding author

Abstract: We found distinct pelage characters in Finlayson’s squirrel (Callosciurus finlaysonii) population, which is endemic to Lao Island of the Cham Islands, located off the coast of central Vietnam. Among squirrels of the ‘C. erythraeus-finlaysonii complex’, which consists of all forms of C. erythraeus and C. finlaysonii, mitochondrial cytochrome-b sequences show that the Lao Island squirrel forms a cluster with C. finlaysonii with external characters of C. erythraeus flavimanus, defined previously as ‘C. finlaysonii morpha flavimanus’. Both squirrel forms, however, differed in pelage colour. This different colouration may have arisen from the effect of geographic isolation.

Key words: Finlayson’s squirrel, Callosciurus erythraeus-finlaysonii complex, cytochrome-b sequence, Vietnam, Lao Island, pelage colour.

DOI: 10.17109/AZH.67.4.403.2021

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