taxonID	type	description	language	source
6C59A8311630E251FF31FE5C92EDA6FC.taxon	materials_examined	Type species: Paladilhia robiciana Clessin, 1882	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A8311630E252FF31FB06915DA40B.taxon	description	(Figs 3 - 4)	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A8311630E252FF31FB06915DA40B.taxon	materials_examined	Type locality Montenegro: Herceg Novi, Zelenika - Kuti, side rivulet of Opaĉica, spring from well behind last house, 42.462747 ° N, 18.587347 ° E, (Fig. 2 E). Type material Holotype, Type locality, J. Grego and Z. P. Erőss leg., 25.07.201 6 (HNHM 103039).	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A8311630E252FF31FB06915DA40B.taxon	description	Measurements Holotype: H 2.0 mm; W 0.83 mm; BH 1.13 mm; BW 0.73 mm; AH 0.63 mm; AW 0.49 mm.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A8311630E252FF31FB06915DA40B.taxon	etymology	Etymology Named after its type locality situated in the northern part of Kotor (Cattaro) Bay.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A8311630E252FF31FB06915DA40B.taxon	description	Description Two mm high fragile shell, yellowish corneous, translucent with five convex whorls separated by deep suture. The surface smooth and shiny. Shell elongate, oval-conical, slightly tapering towards semi-blunt apex. Umbilicus closed. Aperture asymmetric, tear shaped, attached to the body whorl at its upper columellar side. Peristome margin blunt, equally thick and not reflected. Outer lip not protruding beyond body whorl and frontal shell profile. Lateral profile of outer lip straight. Differentiating features The new species is distinguished from Paladilhiopsis gittenbergeri (Reischütz and Reischütz, 2008) (Vau i Dejës, Albania) by its smaller more slender shell shape with a blunter apex and proportionally much smaller aperture. Paladilhiopsis falniowskii (Grego et al., 2017) (Krumë, Albania) has a larger shell with proportionally larger body whorl and a larger, differently positioned aperture. It differs from syntopic Stygobium hercegnoviensis n. sp. by its larger, more inflated, more conical shell with a proportionally smaller apex, proportionally larger and more elongated aperture, and more tumid whorls. Habitat The type locality is an outlet from the stony well build some centuries ago to supply the water to adjacent gardens and houses.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A8311630E252FF31FB06915DA40B.taxon	distribution	Distribution Known only from the type locality, where it was found together with the Stygobium hercegnoviensis n. sp. The species likely inhabits the adjacent stygobiont habitats around Zelenika basin.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A8311630E252FF31FB06915DA40B.taxon	discussion	Remarks The assignment of the new species to the genus Paladilhiopsis is only provisional, until the molecular data become available.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A8311633E25CFF31FC5A94DAA675.taxon	description	(Figs. 19 – 21)	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A8311633E25CFF31FC5A94DAA675.taxon	materials_examined	Type locality Montenegro, Herceg Novi, left side spring of Nemila rivulet, on turn of Spasića i Masare street, 42.456214 ° N; 18.538386 ° E, (Fig. 1 E). Type material Holotype: Type locality, J. Grego leg., 26.07.201 6 (HNHM 103043). Paratypes: same data (NHMW 111666 / 2, OSUM 42390 / 2, NHMUK 20180025 / 2, SMF 349440 / 2, CNHM 11480 / 2; FMNH 384780 / 2, NMBE 554115 / 2, MNHN-IM- 2014 - 6894 / 2, FLMNH UF 510442 / 2, RMNH. MOL. 290816 / 2, MUZSP 138303 / 2, coll. Glöer / 1, coll. Grego / 59,); same data, Z. P. Erőss and Z. Fehér leg., 17.07.201 7 (HNHM 103044 / 64, col. ZPE / 60, coll. Grego / 19); 714 JG / 24 HNHM 76. Other material A similar but smaller and smoother form had been reported by Schütt 1960 from Risan Velika Špilja cave at NE Bank of Kotor Bay (SMF 194006), erroneously assigned to Saxurinator montenegrinus, and could possibly represent the subspecies of P. matejkoi n. sp.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A8311633E25CFF31FC5A94DAA675.taxon	description	Measurements Holotype: H 2.31 mm; W 1.01 mm; BH 1.17 mm; BW 0.61 mm; AH 0.75 mm; AW 0.65 mm.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A8311633E25CFF31FC5A94DAA675.taxon	etymology	Etymology Named after Matej Grego, who participated on the discovery of new species and is the younger son of the first author.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A8311633E25CFF31FC5A94DAA675.taxon	description	Description Solid elongate milky-yellowish conical shell (2.31 mm) with blunt apex and six convex whorls separated by a deep suture. Shell surface smooth and shiny with faint axial ribs. Umbilicus open, slit-like and obscured by reflected columellar margin. Aperture ovoid, attached to body whorl at its upper columellar part. Peristome blunt, reflected at columellar part. Outer lip profile weakly sinuous in lateral view and parallel to the columellar axis. In frontal view labral margin protrudes from body whorl. Differentiating features The morphologically and geographically closest species to Paladilhiopsis matejkoi n. sp. is the Saxurinator montenegrinus Schütt, 1959 (Hercegovina, Bileća), from which it differs by its more oval aperture, much less sinuous labral margin, more open umbilicus, and different lateral profile of anterior body whorl (Tab. 2). The geographically close Lanzaia edlaueri Schütt, 1961 (Figs. 25 - 27) and Lanzaia vjetrenicae Kušĉer, 1933 have more elongate shells with sinuous axial ribs and differently shaped expanded apertures. Tab. 2 Shell morphometry comparison of Paladilhiopsis matejkoi n. sp. with related species and forms: Anatomy The penis (Fig. 9) straight, without surface protrusions, with a broad base and long and slender filament, vas deferens easily visible inside. The female reproductive organs typical of the Paladilhiopsis (Hofman et al. 2018), not illustrated since the specimen was not well fixed. Molecular data Paladilhiopsis matejkoi clearly belongs to the Paladilhiopsis clade based on COI as well as for H 3 loci (Figs. 10, 11), but it is different from all the other species of Paladilhiopsis. It differs from other Paladilhiopsis species at 9.9 – 12.5 % for COI and 1.6 – 6.2 % for H 3.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A8311633E25CFF31FC5A94DAA675.taxon	distribution	Distribution Known only from the type locality and a spring 300 m E of type locality, where it occurs syntopically with more scarce S. hercegnoviensi s n. sp. The type locality is a small spring on the right bank of the Nemila rivulet. The no longer-used stony water reservoir indicates its historical importance, but even now the active well is used as a water supply to the adjacent houses. The spring zone is covered by dense vegetation and is inhabited by Litthabitella chilodia (Westerlund, 1886). The new stygobiont species was also found in another spring situated near the left bank of Nemila about 300 m downstream from the type locality and likely inhabits the groundwater aquifers of the whole Nemila tributary upstream to the large seasonal springs at the northern end of its valley.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A831163CE25DFF31FBED93C5A34F.taxon	materials_examined	Type species: Bosnidilhia vreloana Boeters, Glöer & Pešić, 2013 (Fig. 5)	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A831163CE25FFF31FB70946EA21A.taxon	description	(Fig. 6)	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A831163CE25FFF31FB70946EA21A.taxon	materials_examined	Type locality Montenegro: Podgorica municipality, Hasanoj, Izvor Vitoja, near Skadar Lake close to Albanian border pass Božaj, 10 m a. s. l., 42,325400 ° N; 19,362888 ° E. Type material Holotype: Type locality, leg. Erőss, Fehér, Grego 05.07.201 5 (HNHM 103041). Paratypes: (HNHM 103041 / 1, coll. Glöer / 1, coll. Grego / 6, ZPE / 3).	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A831163CE25FFF31FB70946EA21A.taxon	description	Measurements Holotype: H 1.40 mm; W 0.59 mm; BH 0.76 mm; BW 0.48 mm; AH 0.45 mm; AW 0.42 mm.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A831163CE25FFF31FB70946EA21A.taxon	etymology	Etymology	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A831163CE25FFF31FB70946EA21A.taxon	materials_examined	Named after type locality, the Vitoja spring in Podgorica municipality on the NE shore of Skadar Lake.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A831163CE25FFF31FB70946EA21A.taxon	description	Description Small (1.4 mm) fragile milky yellowish shell with four almost flat whorls with a weak suture and very blunt rounded apex. Shell surface smooth and silky. Umbilicus closed. Aperture irregular ovoid, separated from the body whorl by a tiny furrow along all the columellar side. Peristome margin blunt and very slightly reflected. Outer lip sinuous-straight and protruded from the body whorl in frontal view. Differentiating features This species can be distinguished from Bosnidilhia vreloana Boeters, Glöer & Pešić, 2013 (Fig. 5, Bosnia, Banja Luka) by its smaller shell (1.4 mm vs 1.9 mm), more cylindrical shell shape with blunter apex, proportionally smaller body whorl, and the different shape of the aperture, which is more expanded on its columellar aspect (Tab. 2). Habitat Vitoja Spring is located on the northeastern shore of the Skadar Lake in Montenegro, near the settlement Hasanoj and close to the Albanian border pass Božaj on E 762 Rd. It is a large karstic spring zone adjacent to the shore and consists of one main spring flowing into two joined small spring lakes with several additional sublacustrine spring zones at their bottom. In addition, five side springs of variable outflows are located within 150 m west of the main spring. During high-water conditions the whole spring zone is absorbed by the elevated level of Skadar Lake, while during the summer dry season, some of the side springs are very small or intermittent. All springs emerge at the border of the limestone massif and the alluvium of Skadar Lake and are most likely supplied from sinkholes of Skoraĉ Polje at Kuĉke Planine and perhaps from ponors in the Cjievna River valley as well.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A831163CE25FFF31FB70946EA21A.taxon	distribution	Distribution Only known from the type locality, where it is found together with Plagigeyeria zetaprotogona Schütt, 1960, Vinodolia matjasici (Bole, 1961), Vinodolia scutarica (Radoman, 1973), Lanzaia pesici Glöer, Grego, Erőss & Fehér, 2017, Pyrgula annulata (Linnaeus, 1767), Islamia montenegrina Glöer, Grego, Erőss & Fehér, 2017 and Bracenica vitojaensis Glöer, Grego, Erőss & Fehér, 2017.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A831163CE25FFF31FB70946EA21A.taxon	discussion	Remarks The assignment of the new species to the genus Bosnidilhia is based only on similarities in shell morphology, and it remains provisional until the molecular data become available.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A831163EE25FFF31FA69921FA032.taxon	materials_examined	Type species Stygobium hercegnoviensis Grego and Glöer n. sp	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A831163EE25FFF31FA69921FA032.taxon	diagnosis	Diagnosis The diagnostic features of the new genus are the same as those of the type species, Stygobium hercegnoviensis n. sp. The main distinction vs other hydrobiid genera is in molecular H 3 data, where the new genus forms a very distinct clade.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A831163EE25FFF31FA69921FA032.taxon	etymology	Etymology Named after its stygobiont habitat.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A831163EE258FF31F8FE92D8A0EC.taxon	description	(Figs. 7 – 9)	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A831163EE258FF31F8FE92D8A0EC.taxon	materials_examined	Type locality Montenegro: Herceg Novi, Savina, below Savina Monastery under Braće Grakalić street at Melinje Hospital, behind the neonatal pavilion, 42.451656 ° N; 18.555225 ° E, 16 m a. s. l. (Fig. 2 A). Type material Holotype: Type locality, J. Grego leg., 26.07.201 6 (HNHM 103037). Paratypes: same data (HMUK 20180026 / 2, SMF 349441 / 2, CNHM 11479 / 2, NMBE 554116 / 2, coll. Glöer / 1, coll. Grego / 22); same data, Z. P. Erőss and Z. Fehér leg., 16.07.201 7 (HNHM 103038 / 73, NHMW 111665 / 2, Grego / 6); same data, Z. P. Erőss and Z. Fehér leg., 16.07.201 8 coll HNHM 115, ZPE / 55 coll. Grego / 55 Montenegro: Herceg Novi, right bank spring of Nemila rivulet, on turn of Spasića i Masare street, 42.456214 ° N; 18.538386 ° E, (Fig. 2 E), Jozef Grego leg., 26.07.201 6 (coll Grego / 1); same locality Z. P. Erőss and Z. Fehér leg., 16.07.2017 (coll. Grego / 4); 714 HNHM / 4; Montenegro: Herceg Novi: Sušćepan, Izvor Vostanj above the village, 42.468768 ° N; 18.513022 ° E, (Fig. 2 C), Jozef Grego leg., 28.7.201 6 (coll. Grego / 34); Montenegro: Herceg Novi, Trebesinj, springs above the village behind Crkva St. Tome, 42.472 886 ° N, 18.524117 ° E, (Fig. 2 B), Jozef Grego leg., 28.7.201 6 (coll. Grego / 20); Montenegro: Herceg Novi, Zelenika - Kuti, side rivulet of Opaĉica, spring behind last house, 42.462747 ° N, 18.587347 ° E, J. Grego and Z. P. Erőss leg., 25.07.201 6 (coll. Grego / 6).	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A831163EE258FF31F8FE92D8A0EC.taxon	description	Measurements Holotype: H 1.65 mm; W 0.68 mm; BH 0.87 mm; BW 0.61 mm; AH 0.45 mm; AW 0.44 mm.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A831163EE258FF31F8FE92D8A0EC.taxon	etymology	Etymology Named after the type locality situated inside Herceg Novi town at north shore of Kotor Bay, Montenegro.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A831163EE258FF31F8FE92D8A0EC.taxon	description	Description Fragile milky yellowish, silky, translucent shell with 4 ½ convex whorls with a deep suture and a blunt apex. Shell surface smooth with very weak axial growth lines. Shell small (1.65 mm), elongate, subconical, slightly tapering towards the blunt apex. Umbilicus tiny, slit like. Aperture ear-shaped, proportionally smaller than body whorl, from which separated by a weak furrow. Peristome margin sharp and not reflexed reflected. Outer lip straight in lateral view and slightly scooped backward at its anterior end. In frontal profile lip aligned with the tapering shell outline. Differentiating features According to molecular data (only H 3), the new genus forms a distinct Hydrobiid clade among the Agrafia Szarowska & Falniowski, 2011, Hauffenia Pollonera, 1898, Belgraniella Wagner, 1928 and Montenegrospeum Pešić & Glöer, 2013 group, with a p- distance 0.039 to 0.062. The small elongate shell of the new genus can be compared with two Albanian species provisionally treated in the family Moitessieriidae: Paladilhiopsis szekeresi Grego et al., 2017 (Albania, Tamarë) and Paladilhiopsis prekalenis Grego et al., 2017 (Albania, Prekal). From both it differs by its more slender elongated conical shell, less blunt apex, and smaller aperture, which is situated expanded more on the columella side (Tab. 1). The availability of molecular data from the above two Paladilhiopsis species could possibly confirm their affiliation with the new genus Stygobium. Habitat The type locality is a small spring captured in a cistern with one central outlet and one leak near the neonatal building of Meljine Hospital. Few live specimens and empty shells were found in sandy sediment of the drainage channel collecting the leaked water. All the other known localities along NW coast of Kotor Bay have a similar stony cisterns with roughly-carved stone outlets collecting spring water, and the specimens were found in sediments near these outlets. Most likely, the species inhabits the underground water channels and stony water reservoirs, and only the occasionally washed-out specimens are trapped in sand beyond the water outlet.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A831163EE258FF31F8FE92D8A0EC.taxon	distribution	Distribution Aside from the type locality on the grounds of Meljine Hospital, the species is known in the greater vicinity of Herceg Novi on the N shore of Kotor Bay: at Sušćepan, Trebesinj, Zelenika- Kuti and two springs near the right bank of Nemila rivulet Rivulet at 18 - 320 m altitude. In the locality near Zelenika the species is found with Paladilhiopsis cattaroensis n. sp., and at Nemila with Saxurinator matejkoi n. sp. while at the type locality its syntopic with Plagigeyeria feheri n. sp.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A8311638E259FF31FF1792D5A636.taxon	materials_examined	Type species: Geyeria plagiostoma Wagner, 1914	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A8311638E25AFF31FA659520A26F.taxon	description	(Figs. 35 – 39)	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A8311638E25AFF31FA659520A26F.taxon	materials_examined	Type locality Montenegro: Herceg Novi, Savina, below Savina Monastery under Braće Grakalić street at Meljine Hospital, behind neonatal pavilion, 42.451656 ° N; 18.555225 ° E, (Fig. 2 A). Type material Holotype: Type locality, J. Grego leg., 26.07.201 6 (HNHM 103046). Paratypes: same data (col. Gloer 1, coll. Grego / 8); same data, Z. P. Erőss and Z. Fehér leg., 16.07.201 8 (HNHM 104183 / 17, coll. Grego / 10, collection Erőss / 10).	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A8311638E25AFF31FA659520A26F.taxon	description	Measurements Holotype: H 1.50 mm; W 0.78 mm; BH 0.88 mm; BW 0.66 mm; AH 0.56 mm; AW 0.51 mm.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A8311638E25AFF31FA659520A26F.taxon	etymology	Etymology Named after Hungarian malacologist and friend Zoltán Fehér, curator of the malacological collection of Hungarian Natural History Museum, Budapest to acknowledge his substantive work on the gastropod fauna of the Balkans.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A8311638E25AFF31FA659520A26F.taxon	description	Description Shell small, 1.5 mm high, with four convex whorls separated by a deep suture, oval-elongated in shape, with blunt apex and corneous-yellowish color. Surface shiny, very finely axially ribbed, covered by small incrustation spots from precipitated calcium carbonate. Umbilicus closed. Proportionately large oval aperture with conspicuously reflected margins. Outer lip weakly sinuated sinuous at columellar margin in lateral view. Expanded labral margin protrudes from body whorl in frontal (apertural) view. Differentiating features This is the smallest known Plagigeyeria species (1.50 mm). Compared to the geographically close Plagigeyeria zetaprotogona pageti forma minor Schütt, 1961 (Montenegro, Risan) (Figs. 31 – 31), the new species differs by its much smaller, more slenderer elongated subcylindrical shape with less conspicuous axial ribbing, by the more closed umbilicus as well as by the different shape of the aperture and the weakly sinuated labral margin (Tab. 4). The overall shell shape of the new species resembles Plagigeyeria plagiostoma (A. J. Wagner, 1914) from Vrelo Bosne near Ilidža, but the new species differs by more small, oval and slender shell with its hidden umbilicus. Habitat See Stygobium hercegnoviensis n. sp.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
6C59A8311638E25AFF31FA659520A26F.taxon	distribution	Distribution Known only from the type locality, where it was found with the Stygobium hercegnoviensis n. sp.	en	Grego, Jozef, Glöer, Peter, Falniowski, Andrzej, Hofman, Sebastian, Osikowski, Artur (2019): New subterranean freshwater gastropod species from Montenegro (Mollusca, Gastropoda, Moitessieriidae, and Hydrobiidae). Ecologica Montenegrina 20 (2019): 71-90, DOI: 10.37828/em.2019.20.6, URL: http://dx.doi.org/10.37828/em.2019.20.6
