Khayajehia dianae, Pešić & Glöer, 2023

Pešić, Vladimir & Glöer, Peter, 2023, A new genus and species of springsnails (Gastropoda: Hydrobiidae) from Northeastern Iran with some new records of freshwater gastropods, Ecologica Montenegrina 64, pp. 191-196 : 192-194

Khayajehia dianae n. sp.

https://zoobank.org/ urn:lsid:zoobank.org:act:7DBFC47C-495A-40C9-83DC-FCFE433A81D1

Fig. 1

Type series — Holotype ( ZMH 141510 ): Shell height 1.58 mm, shell width 1.28 mm, IRAN, Semnan Province, IRH10B, Haq-ol-Khayajeh village , reocrenic spring and springbrook, 37.139077 N, 55.994571 E, 01.viii.2022 leg Pešić . Paratypes: numerous (>50) ex. ( ZMH 141511 ), 20 ex. coll. Glöer, same data as the holotype .

Type locality — Iran, Semnan province, Haq-ol-Khayajeh village , reocrenic spring and springbrook, 37.139077°N, 55.994571°E .

Etymology — Named after Dr Diana Delicado (Giessen, Germany) in appreciation of her studies of Iranian gastropod fauna.

Description. Shell — The conical globular shell has 3.5 fast growing whorls, separated by a weak suture, with a prominent body whorl. The spire is short. The aperture is pyriform with an angle at the top. The outer lip is slightly sinuated from lateral view. The peristome is sharp, the umbilicus is closed. The shell is 1.58- 1.91 mm high and 1.32-1.46 mm broad.

Animal — The mantle is black with a white border. The proximal part of the penis is broad and rectangular while distal part is elongated and slender.

Differentiating features — As for the genus.

Habitat — Reocrenic spring and springbrook ( Fig. 2A ); environmental characteristics of the sampling site: water temperature 21.7 C°; electrical conductivity 739 µS/cm; pH 7.31; dissolved oxygen 0.61 mg /L; water flow 0.6 m /s.

Distribution — Iran; only known from the type locality in Semnan province ( Fig. 2A ).

New records

Figures

Figure 1. Khayajehia dianae n. sp. (A-C holotype, D-I paratypes): A, D, F-I = shells, frontal view; B-C = penis in situ; E = shell, lateral view.

Figure 2. Photographs of sampling localities: A — IR10-2022, spring and springbrook near Haq-ol-Khayajeh village, Semnan Province, locus typicus of Khayajehia dianae n. gen. et n. sp. B — IR19-2022, pool near Chaman Bid, sampling site of Planorbis intermixtus. C — the outflow of the qanat in Garmeh city, sampling site of Ecrobia grimmi, Radix auricularia and Physa acuta. D — IR19-2022, saline pool at Feshanjerd-Gurpan-Esfarayen road, sampling site of Ecrobia grimmi. Photos by V. Pešić.