Travunijana angelovi (Schütt, 1972) Grego, 2020

Grego, Jozef, 2020, Revision of the stygobiont gastropod genera Plagigeyeria Tomlin, 1930 and Travunijana Grego & Glöer, 2019 (Mollusca; Gastropoda; Moitessieriidae and Hydrobiidae) in Hercegovina and adjacent regions, European Journal of Taxonomy 691, pp. 1-56 : 39-40

Travunijana angelovi (Schütt, 1972) comb. nov.

Figs 13E , 14B

Plagigeyeria nitida angelovi Schütt, 1972: 116 , 119, tab. 6, fig. 9.

Plagigeyeria angelovi – Bole & Velkovrh 1986: 202 – Bodon, Manganelli & Giusti 1996: 33, fig. 13. Plagigeyeria nitida angelovi – Bank 2013: Fauna Europaea v. 2.6 – Bank & Neubert 2017: 25.

Diagnosis

Hard shell (3.3 mm) with conical spire and broader body whorl and with distinct broad and blunt umbilical keel at lower part of the body whorl. Aperture irregularly broad lens shaped and more protruding at the basal view. Lateral labral profile straight and columellar labrum possesses a weak sinuation. Protoconch surface regularly pitted.

Distribution

Empty shells are known from the Vrelo “Ombla” (2.5 m a.s.l.) in Komolac near Dubrovnik (Schütt 1972; Schütt 2000), supplied by groundwater mainly from Popovo Polje (269 m a.s.l.) and its hinterland.

Remarks

The second carinated species of the Western Trebišnjica aquifer, T. angelovi (Schütt, 1972) has an elongate shape with a smooth surface. Originally placed by Schütt (1972) as a subspecies of T. nitida ( Schütt, 1963) , it is known from springs in Hutovo (Svitavsko) Blato. However nothing common can be found on the shell morphology of both taxa except for the carinated bottom of the body whorl; so their treatment as independent species is preferred herein. Travunijana angelovi can be scarcely found in the accessible thanatocoenoses of the Vrelo “Ombla” near Komolac. Only a few usually worn shells within each sample suggest that its remote habitat is most likely situated deep inside the mountain, far away from the spring outlet.

Figures

Fig. 13. Historical type specimens of species of Plagigeyeria from Hercegovina and adjacent regions, currently transferred to the genus Travunijana Grego & Glöer, 2019. A. Plagigeyeria robusta Schütt, 1959, Hercegovina, spring Čepelica near Bileća, holotype (SMF 162833). B. P. klemmi Schütt, 1961, Croatia, spring Stenjevac south of Vrgorac, holotype (SMF 164344). C. P. tribunicae Schütt, 1963, Hercegovina, spring Trebišnjica near Bileća, holotype (SMF 168968). D. P. edlaueri Schütt, 1961, Hercegovina, spring Sopot Mlin in Svitavsko Blato, holotype (SMF 164342). E. P. angelovi Schütt, 1972, Croatia, spring Ombla (Rijeka Dubrovačka) in Komolac, holotype (SMF 221242). F. P. nitida Schütt, 1963, Hercegovina, spring Sopot Mlin in Svitavsko Blato, holotype (SMF 168970).

Fig. 14. A. Travunijana vruljakensis Grego & Glöer, 2019, Hercegovina, Vrelo Studenac, Gorica near Trebinje, SBMNH 625961 (SEM SBMNH Vanessa Delnavaz). B. T. angelovi (Schütt, 1972), Spring Ombla, Komolac near Dubrovnik, paratype (SMF 318892). C–D. T. tribunicae (Schütt, 1963), Hercegovina, Bileća, main spring of Trebijšnica. C. SMF 191518. D. SMF 318909. Scale bars = 1 mm (B–D SEM SMF Sigrid Hof).