Ohridonaumia trajanovski, Glöer & Pešić, 2023

Glöer, Peter & Pešić, Vladimir, 2023, A new Ancylus and a new genus of Hydrobiidae from the Ohrid Lake basin (Mollusca: Gastropoda), Ecologica Montenegrina 64, pp. 185-190 : 188

Ohridonaumia trajanovski n. sp.

https://zoobank.org/ urn:lsid:zoobank.org:act:17DBAFC3-D390-4B2E-B27E-B7E061E71451

Figs. 3 A-G

Type series — Holotype ( ZMH 141505 ): Shell height 2.21 mm, shell width 1.92 mm; NORTH MACEDONIA, Ohrid Lake area, the springs of the Black Drim near Monastery of St. Naum , 40°54'36.04"N, 20°44'51.14"E, 13.09.2019 leg. Pešić. Paratypes: 3 ex. ZMH 141506 , 2 ex. in coll. Glöer, same data as the holotype .

Type locality — North Macedonia, the springs of the Black Drim near Monastery of St. Naum, 40°54'36.04"N, 20°44'51.14"E .

Etymology — New species is named after Dr Sasho Trajanovski (Hydrobiological Institute, Ohrid) in appreciation for his comprehensive research of Lake Ohrid and its biota.

Description — The valvatoid conical shell has 3.5 slightly convex whorls which grow regularly in height and width. The suture is deep. The aperture is nearly circular with a slightly sinuated lower lip, the outer lip is straight from lateral view. The umbilicus is open. The shell is 1.74-2.21 mm high and 1.66-1.92 mm broad.

The flat penis is elongated triangular, tapered at the distal end without any bulge.

Differentiating features — As for the genus.

Habitat — Spring.

Distribution — North Macedonia; only known from the type locality ( Fig. 1 ).

Figures

Figure 1. The springs of the Black Drim near Monastery of St. Naum, the type locality of Ancylus naumiensis n. sp. and Ohridonaumia trajanovski n. sp. Inset: Map of Ohrid Lake with marked sampling site. Photo by V. Pešić.

Figure 3. Ohridonaumia trajanovski n. sp. (A-C, holotype; G, paratype): A-C, G = shells; D = penis in situ; E = penis from dorsal view; F = penis from ventral view.