Cochlostoma (T.) muranyii, Zallot & Kamchev & Schilthuizen & Fehér & Mattia & Gittenberger, 2024

Zallot, Enrico, Kamchev, Panche, Schilthuizen, Menno, Fehér, Zoltán, Mattia, Willy De & Gittenberger, Edmund, 2024, Cochlostoma Jan, 1830 revised: an overview of the subgenus Turritus Westerlund, 1883 and its species (Caenogastropoda, Cochlostomatidae), European Journal of Taxonomy 927, pp. 1-163 : 63-66

Cochlostoma (T.) muranyii sp. nov.

urn:lsid:zoobank.org:act:7DABC097-C443-4D4A-863F-F8B54756F316

Figs 44 (Cyan dots), 53–54

Differential diagnosis

It can be distinguished from the other species inhabiting Albania because the thin, closely spaced and very regular in strength and spacing ribs. Compared with C. (T.) mnelense , it shows, in the female genitals, a shorter and straight seminal receptacle.

Etymology

This species is dedicated to Dávid Murányi, entomologist and field zoologist, who has made a significant contribution to our knowledge of the aquatic insect fauna of the Balkans and Albania in particular.

Types

Holotype

ALBANIA • ♀; 1- Has district , Mali i Pashtrikut 1730; 42.207° N, 20.5285° E; Fehér, Murányi and Ujvári leg.; May 2010; HNHM99320 a/1.

Paratypes

ALBANIA • several specimens; same collection data as for holotype; HNHM99320 b (1 ♀ and 1 ♂ out of the lot are depicted in Fig. 53 ) .

Other specimens

ALBANIA • 2- Salghinë ; 42.2155° N, 20.5171° E; 2010; Fehér, Murányi and Ujvári leg.; HNHM99658 • 3- Shkallë Bicaj ; 41.9897° N, 20.4202° E; 2007; Dányi, Erőss, Fehér, Hunyadi and Murányi leg.; HNHM99887 .

Type locality

ALBANIA • 1- Has district , Mali i Pashtrikut 1730; 42.207° N, 20.5285° E .

Description

SHELL. Closely spaced riblets on last part of protoconch. Teleoconch spotless, with thin and very closely spaced ribs. Moderately strong lip with more or less abruptly inwardly curved columellar lobe, often only partially covering umbilicus.

MEASUREMENTS. 6 ♀♀: whorls= 7.2–8.1, H = 7.2–8.5 mm, H/W= 2.46–2.7, roundness= 0.12–0.16, ribs incl.= 59–61°, apert. incl.= 16–23°, ribs/mm 1 st wh.= 11–16, ribs/mm 4 th wh.=10–18.

FEMALE GENITAL ORGANS. Connection of pedunculus to bursa copulatrix slightly moved posteriorly. Relatively short and straight (compared with C. (T.) mnelense ) seminal receptacle. Few short loops close to apex. Junction of uterus gland close to connection between pedunculus of bursa copulatrix and distal oviduct.

Remarks

In an area northeast of the range of C. (T.) mnelense , we collected samples characterized by a very distinct shell ribbing and female genital morphology. Despite the absence of molecular data, we describe them as C. (T.) muranyii sp. nov., next to C. (T.) mnelense because of the geographical proximity. The assignment to clade A is tentative, waiting for clarifying molecular data.

Clade B

Note on clade B

In an unresolved polytomy at the roots of the clade there are the samples collected in the Apuane Alps, which are a small calcareous mountain range in the northern Apennine region surrounded by arenaceous terrains. We obtained both the 16S and H3 markers in 10 samples of the 31 we analysed. All the populations of Cochlostoma of the Apuane share the same female genital morphology but differ in shell morphology, with 2 main types, one having a horn-brown shell with more or less visible reddish spots and a variable ribbing, and a second one with a spotless, cream-coloured shell with thin and regular ribs. Some samples of the first form have rather thin and closely spaced ribs, whereas others have a coarser ribbing. The shape of the shell varies from slim (the slimmest shell observed in Cochlostoma ) to sturdy.

These differences in the shell morphology are reflected in the phylogenetic trees, with the analysed samples not clustering in a branch of the BA and ML trees. Apparently, more than one endemic species of Cochlostoma inhabits this small mountain range, contrary to the currently accepted view, where only the nominotypical subspecies of C. (T.) montanum ( Issel, 1866) is reported from this area. We recognize three nominal taxa for the Apuane Alps, namely C. (T.) montanum , C. (T.) sospes (Westerlund in Paulucci, 1879) and C. (T.) elongatum ( Paulucci, 1879) . Further sets of problematic samples are reported in Appendix.

Figures

Fig. 44. Distribution of samples of clade A from Albania: red dots=Cochlostoma (T.) mnelense (Wagner, 1914); white dots=C. (T.) kontschani sp. nov.; cyan dots= C. (T.) muranyii sp. nov.; orange dots= samples tentatively assigned to C. (T.) mnelense.

Fig. 53. Cochlostoma (T.) muranyii sp. nov., female holotype (Hf) (HNHM-99320a/1), female (Pf) (HNHM-99320b) and male paratype (Pm) (HNHM-99320b), Mali i Pashtrikut 1730, AL.