Zospeum pagodulum Inäbnit, Jochum & Neubert, 2019

Inäbnit, Thomas, Jochum, Adrienne, Kampschulte, Marian, Martels, Gunhild, Ruthensteiner, Bernhard, Slapnik, Rajko, Nesselhauf, Claudia & Neubert, Eike, 2019, An integrative taxonomic study reveals carychiid microsnails of the troglobitic genus Zospeum in the Eastern and Dinaric Alps (Gastropoda, Ellobioidea, Carychiinae), Organisms Diversity & Evolution 19 (2), pp. 135-177 : 164-165

Zospeum pagodulum Inäbnit, Jochum & Neubert n. sp.

Figure 9a–e

Type specimens Holotype NMBE 548815 , Kučka jama, 23.4.2009, leg. Bedek ; Paratypes NMBE 553415 /4, Kučka jama, 23.4.2009, leg. Bedek ; NMBE 553362 /1, Kučka jama, 23.4.2009, leg. Bedek.

Specimens examined Croatia: NMBE 548789 /1, Grnjača špilja, 24.6.2009, leg. Bedek ; NMBE 553361 /1, Pećina kod sela Puhari, 21.4.2009, leg. Bedek ; NMBE 553359 /2, Proljetna jama, 28.6.2009, leg. Lukic ; NMBE 553357 /1, Jama ispod Tominićevog brega, 25.4.2009, leg. Lukic ; NMBE 553358 /1, Jama ispod Tominićevog brega, 25.4.2009, leg. Bilandzija ; NMBE 553363 /5, Jama ispod Tominićevog brega, 25.4.2009, leg. Lukic ; NMBE 553360 / 1, Lučićka špilja, 7.6.2008, leg. Kljakovic ; NMBE 548807 /1, Grnjača špilja, 24.6.2009, leg. Bedek.

Diagnosis Shell ca. 1.8 mm, conic, transparent, sometimes ribbed, peristome roundish with a straight parietal shield, columella with a parietalis and a weak columellaris.

Measurements (n = 18): sh: 1.61–1.99 mm (mean: 1.764 ± 0.089 mm); sw: 1.08–1.26 mm (mean: 1.167 ± 0.049 mm); ah: 0.8–1.01 mm (mean: 0.924 ± 0.059 mm); aw: 0.66– 0.81 mm (mean: 0.747 ± 0.038 mm); number of whorls: 4.75–5.5 (mean: 5.056 ± 0.22).

Description Shell conical, translucent when fresh; shell usually smooth, but a ribbed population occurs in Grnjača špilja; aperture taller than wide; parietal shield well-differentiated from the lip, its margin usually straight, sometimes convex; parietalis present in the aperture, though comparatively weak; columellaris starting behind the aperture, usually weak.

Not really separable from other smooth-shelled species within the Z. frauenfeldii clade (such as Z. frauenfeldii , Z. bucculentum , Z. robustum ); whorl usually less shouldered than in Z. bucculentum . Both species demonstrate considerable variation.

Etymology Named for the pagoda-like shell shape of the species in general and the holotype in particular.

Distribution (Supplementary Fig. S12) Endemic to the Croatian Primorje-Gorski Kotar region, where it is known primarily from five caves on the Istrian peninsula: Kučka jama ( Fig. 9a ), Grnjača špilja ( Fig. 9e ), Proljetna jama, Pećina kod sela Puhari ( Fig. 9c ; together with Z. pretneri ) and Jama ispod Tominićevog brega ( Fig. 9b ). An empty shell from Lučićka špilja near Delnice ( Fig. 9d ) is morphologically assigned to this species.

Figures

Fig. 9 (a–e) Z. pagodulum, (a1–2) Holotype, NMBE 548815, Kučka jama, sh: 1.982 mm. — (b) NMBE 553363, Jama ispod Tominićevog brega, sh: 1.759 mm. — (c) NMBE 553361, Pećina kod sela Puhari, sh: 1.781 mm. — (d) NMBE 553360, Lučićka špilja, sh: 1.613 mm. — (e1– 2) NMBE 548789, Grnjača špilja, sh: 1.765 mm. —(f–n) Z. robustum, (f1–2) NMBE 553536, Tonkovića špilja, sh: 1.826 mm. — (g) NMBE 554397, Tonkovića špilja, sh: 1.52 mm. —(h) NMBE 553368, Špilja pod