Cochlostoma (T.) gracile croaticum ( Pfeiffer, 1870 )

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 : 29-30

Cochlostoma (T.) gracile croaticum ( Pfeiffer, 1870)

Figs 21 (cyan dots), 24–25

Pomatias croaticus Pfeiffer, 1870: 38-15 –16.

Types

Not seen.

Other specimens

CROATIA • 1- Plitvice (topotypical); 44.8640° N, 15.5820° E; 2002; Murányi leg.; HNHM100120 • 2- Korenica Lake ; 44.8931° N, 15.6083° E; 2000; De Mattia leg.; WdM2175 • 3- Gornja Ploča , Mount Zir ; 44.4305° N, 15.6166° E; 2017; Fehér leg.; HNHM100626 • 4- Velebit Mts , Prezid Pass; 44.2477° N, 15.8097° E; 2005; Murányi leg.; HNHM99895 .

Type locality

Pfeiffer (1870: 15–16) listed several localities: “Habitat in Croatia: Trovera (Zelebor), Slunj, Brinj, Plitvice, Perusic, Klek (Brusina)”. Here, we select as locus typicus restrictus Plitvice.

Description

SHELL. Widely spaced riblets on last part of protoconch. Teleoconch spotless, with moderately strong and rounded ribs becoming weaker approaching aperture. Moderately strong lip with columellar lobe abruptly inwardly curved to cover umbilicus.

MEASUREMENTS. 6 ♀♀: whorls =7.3–8.1, H =7.0– 7.8 mm, H/W=2.59–2.76, roundness=0.14–0.19, ribs incl.= 59°–61°, apert. incl.= 14°–18°, ribs/mm 1 st wh.=7–13, ribs/mm 4 th wh.=8–16.

FEMALE GENITAL ORGANS. As in C. (T.) stussineri .

Remarks

We did not amplify DNA of this taxon and therefore we provisionally report it as a subspecies of C. (T.) gracile . Of note is the different shell morphology of the male compared with the females, with much closer ribs (in this respect it is different from the male of C. (T.) gracile gracile from the type locality, which has ribs in the male as widely spaced as in the female), the darker color of the upper whorls and the sturdier shape, a sexual differentiation common in Cochlostoma .

Additional note to clade A

Within clade A there are then two supported branches, one with samples from the Central-Southern Appennine, which could be referred to C. (T.) cassiniacum (Saint-Simon in Paulucci, 1878) and C. (T.) adamii ( Paulucci, 1879) , and another with samples from Albania with C. (T.) mnelense (Wagner, 1914) and a new species in the following described as C. (T.) kontschani sp. nov. Beside these, there are polytomies in the BA or unsupported branches in the ML approach which include taxa from the Balkans: two are described entities from Croatia ( C. (T.) reitteri ( Boettger, 1880) , currently reported as a subspecies of C. (T.) gracile ) and Greece ( C. (T.) pageti Klemm, 1962 ); furthermore, there is a new species here described ( C. (T.) pallgergelyi sp. nov.) and two samples, one related to C. (T.) pageti and the other to the new species for which further studies are needed to understand their taxonomical status and here in the Appendix as NFS127 and NFS145. Finally, another sample from the Tarnova Forest in Slovenia, here in the Appendix as NFS158, raises issues which do not allow to properly classify it.

Figures

Fig. 21. Distribution of the samples of Cochlostoma (T.) gracile (Pfeiffer, 1849): red dots= C. (T.) gracile gracile; green dots =C. (T.) gracile gracillimum (Wagner, 1901); cyan dots = C. (T.) gracile croaticum (Pfeiffer, 1870). A black center indicates samples with amplified 16S.