Travunijana vruljakensis Grego & Glöer, 2019

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 : 38-39

Travunijana vruljakensis Grego & Glöer, 2019

Figs 5B , 14A

Travunijana vruljakensis Grego & Glöer, 2019: 88 , figs 2–6.

Diagnosis

Robust elongate-conical shell (2.7–2.9 mm) with prominent body whorl, fine axial growth lines, blunt apex, closed umbilicus, unprotruding aperture with straight labral profile and sinuated columellar aperture margin. Penis morphology characterised by a small typical outgrowth at the left side, near the blunt penis tip. Teleoconch surface with irregular growth lines, nepionic whorl with irregular flatnodulous malleation and protoconch surface weakly regularly pitted.

Distribution

The species is known only from its type locality at Vrelo “Goricki Studenac” at Gorica near Trebinje and in the nearby Vrelo “Vruljak 1”.

Remarks

The type species of the genus can be classified as crenobiont, however the white animal and reduced eyes could suggest an adaptation to deeper crenobiont zone at the border of stygobiont habitat. The species was not found inside the deep cave zone of the adjacent cave Vrelo “Vruljak 1”. The sexual dimorphism reported for this species (Grego & Glöer 2019) can be very likely generalised to the whole genus and could explain the shell morphology variability of other species assigned herein to the genus.

Figures

Fig. 5 (next page). A. Plagigeyeria plagiostoma (A. J. Wagner, 1914), from Vrelo Bosne in Ilidža, (topotype JG F1116). B. Travunijana vruljakensis Grego & Glöer, 2019, Gorica near Trebinje, spring Studenac (holotype HNHM-MOLL-104416). C. P. inflata (A. J. Wagner, 1928), from Vrelo Bosne in Ilidža (topotype JG F1117). D. P. ljutaensis sp. nov., Konjic district, spring of River Ljuta (holotype HNHM-MOLL-104180). E. P. konjicensis sp. nov., small spring at left bank of Ljuta River, 600 m downstream of the main spring (holotype HNHM-MOLL-104174); F–G. P. olsavskyi sp. nov., Studenci, spring Kajtazovina F. Holotype (HNHM-MOLL-104178). G. Paratype (JG F1192). H–I. P. olsavskyi sp. nov., Ljubuški district, Donji Proložac, spring Mali Prokop (JG F1209).

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).