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Checklist of the Genus Niphargus Schiцdte, 1849 Arthropoda Selecta 29(4): 433–442 © ARTHROPODA SELECTA, 2020 Checklist of the genus Niphargus Schiödte, 1849 (Amphipoda: Niphargidae) in Serbia, with some remarks on their distributions Ñïèñîê âèäîâ ðîäà Niphargus Schiödte, 1849 (Amphipoda: Niphargidae) â Ñåðáèè ñ íåêîòîðûìè çàìå÷àíèÿìè ïî èõ ðàñïðîñòðàíåíèþ Matija Petković1,2, Dragana Miličić1, Vladimir Tomić1, Slobodan Makarov1 Ìàòèéà Ïåòêîâè÷1,2, Äðàãàíà Ìèëè÷è÷1, Âëàäèìèð Òîìè÷1, Ñëîáîäàí Ìàêàðîâ1 1 Institute of Zoology, Faculty of Biology, University of Belgrade, Studentski trg 3, 11000 Belgrade, Serbia. E-mail: [email protected] 2 Serbian Biospeleological Society, Trg Dositeja Obradoviæa 2, 21 000 Novi Sad, Serbia. KEY WORDS: Amphipoda, Niphargus, Serbia, checklist, freshwater. КЛЮЧЕВЫЕ СЛОВА: Amphipoda, Niphargus, Сербия, контрольный список, пресная вода. ABSTRACT. Twenty-two species of the genus later, by Stanko Karaman in 1962 [Karaman, 1962]. Niphargus Schiödte, 1849 (Amphipoda: Niphargidae), Stanko and his son Gordan contributed significantly to including 14 strictly steno-endemic species, are known the expansion of knowledge concerning the niphargids from the territory of Serbia. There are an additional 5 and described over 100 new species alone or in co- species which probably inhabit the same area, but data authorship. At present, the family Niphargidae is com- indicating their presence are doubtful and remain un- posed of 11 genera. There are approximately 30 known confirmed so far. Distinctive morphological characters amphipod fossils, including several Eocene-Oligocene of the species are listed, including all known localities niphargids preserved in amber [Jazdzewski, Kupryja- and the presumed distributions. nowicz, 2010]. How to cite this article: Petković M., Miličić D., The genus Niphargus Schiödte, 1849 numbers close Tomić V., Makarov S. 2020. Checklist of the genus to 400 described species, which makes it one of the Niphargus Schiödte, 1849 (Amphipoda: Niphargidae) largest genera of freshwater amphipods in the world in Serbia, with some remarks on their distributions // [Väinölö et al., 2008]. The majority of species can be Arthropoda Selecta. Vol.29. No.4. P.433–442, Appen- found exclusively in subterranean waters [Zagmajster dix. doi: 10.15298/arthsel. 29.4.05 et al., 2014]. Higher taxonomy is still problematic, even with an annually growing species richness con- РЕЗЮМЕ. Двадцать два вида рода Niphargus firmed by molecular [Meleg et al., 2013] and morpho- Schiödte, 1849 (Amphipoda: Niphargidae), включая 14 logical approaches [Ntakis et al., 2015]. Cryptic niphar- стено-эндемичных, известны с территории Сербии в gid species are being detected increasingly often настоящее время. Вероятно, есть еще 5 видов, кото- [Mathieu et al., 1997; Lefébure et al., 2006, 2007; рые, обитают здесь же, но данные об их наличии Trontelj et al., 2009], which makes an integrative ap- сомнительны или не подтверждены. Mорфоло- proach necessary. Differences between species can be гические признаки для определения указанных видов minor. In contrast, differences between populations of представлены со всеми известными локалитетами и the same species can be significant. предполагаемым распространением. The Balkan Peninsula is known as a hotspot of biodiversity of the genus Niphargus. The country rich- Introduction est in species is Croatia, inhabited by 59 species, fol- lowed by Slovenia with 50, Romania — 39, Bosnia The order Amphipoda, part of the class Malacost- and Herzegovina — 23, Serbia — 22, Montenegro — raca, is highly diverse, currently including 10,273 spe- 21, North Macedonia — 20, Greece — 19, Bulgaria — cies divided into six suborders (http://www. 11 and Albania with only one recorded species (ac- marinespecies.org/amphipoda/index.php). cording to Horton et al. [2019]), counting 189 loci The first record of a niphargid species was the typici citations of all valid species originated from this description of Gammarus puteanus by C.L. Koch in general area. An even greater diversity is expected in 1836. The family Niphargidae was established much some regions, but there is paucity of information about 434 M. Petković et al. Fig. 1. Some highly distinctive and stable characters in Niphargus species inhabiting Serbia. Images are not displayed in the real ratio of dimensions. Gnathopod — A: N. jugoslavicus [after G. Karaman, 1982a], B: N. bajuvaricus [after G. Karaman 1989], C: N. luka [after G. Karaman, 2013a]. Maxilla I — D: N. euserbicus [after G. Karaman, 2012b], E: N. remyi [after G. Karaman, 2012a], F: N. caspary [after G. Karaman 1982b]. Dactylus of pereopod — G: N. illidzensis [after S. Karaman, 1950a], H: N. valachicus [after S. Karaman 1950c], I: N. bogdani [after G. Karaman, 2009]. Epimeral plates — J: N. valachicus [after S. Karaman, 1950c], K: N. euserbicus [after G. Karaman, 2012b]. Рис. 1. Некоторые из самых ярких и стабильных признаков у видов Niphargus, населяющих Сербию. Изображения не соотносятся с реальными размерами. Гнатопод — A: N. jugoslavicus [по: G. Karaman, 1982a], B: N. bajuvaricus [по: G. Karaman 1989], C: N. luka [по: G. Karaman, 2013a]. Maxilla I — D: N. euserbicus [по: G. Karaman, 2012b], E: N. remyi [по: G. Karaman, 2012a], F: N. caspary [по: G. Karaman 1982b]. Палец переопода — G: N. illidzensis [по: S. Karaman, 1950a], H: N. valachicus [по: S. Karaman 1950c], I: N. bogdani [по: G. Karaman, 2009]. Эпимеральные пластинки — J: N. valachicus [по: S. Karaman, 1950c], K: N. euserbicus [по: G. Karaman, 2012b]. their existence and a restricted number of ecological Due to the inaccessibility of their habitats, the avail- publications, probably due to the inaccessibility of their ability of sampled specimens is usually low. For exam- habitats and difficulties in obtaining specimens. ple, N. adbiptus G. Karaman, 1973 [G. Karaman, 1973b] The first described niphargid species from Serbia is and N. remyi [S. Karaman, 1934] have not been docu- Niphargus remyi S. Karaman, 1934 from the Čedovo mented since their originally collections. Remote sam- spring near the city of Sjenica in southwestern Serbia pling methods are usually non-selective and, therefore, [Karaman, 1934]. Phylogeny of the species inhabiting non-effective, which makes caving and cave diving as Serbia was recently explored on the basis of molecular the best possible ways to collect material. In addition, data by Petković et al. [2015] in a paper which is the the somewhat controversial taxonomy and usual identi- first general study of niphargids in the area. At the fication using a combination of several taxonomic char- same time, this paper contains the first record of the acters, makes species identifications of the genus lake ecomorph N. mirocensis Petković et al., 2015 in Niphargus hard. For all above reasons, it is hard to the Carpathian Mountains. determine the real diversity and the level of endemicity Checklist of Niphargus species in Serbia 435 within such group difficult to study. Therefore, it is Morphological description of specimens in this study very important to simplify the identification of species considered some selected body appendages and telson. The as much as possible for the scientific community, at following abbreviations are used: mxI — maxillae I; gpI, least in the case of species found in Serbia. gpII — gnathopods I and II; ppIII–VII — pereopods III– The aim of this paper is to summarize the knowl- VII; plp — pleopod; ep — epimeral plate; upI–III — uro- pods I–III, T — telson, PMV — the private collection of M. edge about the diversity of species of the genus Niphar- Petković in Valjevo. gus in Serbia and to discuss their current status and distributions. We provide an annotated list of all Serbi- Results and Discussion an niphargids, with a brief explanation of highly dis- tinctive morphological characters important for spe- A checklist of currently known niphargid species, cies identification. with their main morphological characters and a list of their geographical locations in the territory of Serbia is Material and methods presented and further discussed. All published and unpublished data regarding records of SYSTEMATICS niphargid species from Serbia were collected and summa- rized. The type localities were revisited in order to confirm Class MALACOSTRACA Latreille, 1802 the presence of specimens and to collect topotypes, fresh Order AMPHIPODA Latreille, 1816 material for preservation and further processing. Sampling Family NIPHARGIDAE Bousfield, 1977 conducted in all known caves or other appropriate nearby localities was made in the case of endemic species. Precise Genus NIPHARGUS Schiödte, 1849 coordinates of type localities were taken, when it was possi- Niphargus adbiptus G. Karaman, 1973 ble, since all previously available data were mainly descrip- tive. The majority of samples and holotypes of all described TYPE LOCALITY: Ravanica Cave (43°58′23.78″N species are deposited in the collection of Academician and 21°29′52.69″E), village of Ravanica near Ćuprija, Serbia. Professor Emeritus Dr. Gordan S. Karaman in Podgorica, TYPE: Holotype (male 9 mm long) deposited in G. Montenegro, as well as in the private collection of Matija Karaman´s collection in Podgorica, Montenegro. Petković in Valjevo, Serbia. Recent material collected by M. DIAGNOSTIC CHARACTERS: Adults up to 9 mm long. Petković is fixed in 60% ethanol, while some specimens are Maxilla I outer lobe with 7 spines, each with 1–6 small kept in 96% ethanol for future DNA extraction. distomedial denticles. Propodus of gnathopod I with a large The collected specimens were processed at the Institute
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