Charpentieria dyodon dyodon (S. Studer, 1820)

De Mattia, Willy, Reier, Susanne & Haring, Elisabeth, 2021, Morphological investigation of genital organs and first insights into the phylogeny of the genus Siciliaria Vest, 1867 as a basis for a taxonomic revision (Mollusca, Gastropoda, Clausiliidae), ZooKeys 1077, pp. 1-175 : 1

Charpentieria dyodon dyodon (S. Studer, 1820)

Figs 40.1, 40.2, 42.1

Distribution.

Charpentieria dyodon s. l. has a limited distribution, restricted to northern Piedmont and adjacent Swiss territories. The nominate subspecies is restricted to the surroundings of Iselle (Piedmont) and adjacent Swiss localities.

Specimens examined.

Italy, Piedmont, Trasquera di Iselle , Verbano. 750 m asl, 46°12'29.53"N, 8°12'46.18"E, [Lab ID 44_1, COI: MW758956 . ITS2: MW757051, MW757052 ; Lab ID C44_3, COI: MW758951 ], I. Niero leg. and det., 2 dissected spm .

External morphology of the genital organs (Fig. 40 .1).

The FO is slightly longer than the V. The FDBC is shorter the BC+SDBC (SDBC+BC). The BC+SDBC is club-like and longer than the V with no distinction between the SDBC and the BC. The apex is round. The D is slightly longer than the BC+SDBC, thinner with a small but round apex. The V is short, cylindrical and large in diameter. The PC is much longer than the V. The PR is short and robust. The E is shorter than the P and very thin.

Internal morphology of the genital organs (Fig. 40 .2).

The A and the P are smooth, with a very fine granulated sculpturing. The V shows many smooth longitudinal pleats. The smooth PP is simple, big, conical with a pointed apex. Its base is partially connected to the ELP and transversally extends along the transition wall, narrowing the transition passage. The epiphallar formula is: PP(ELP). The E shows two main longitudinal moderately fringed pleats that proximally fade before the VD.

Figures

Figure 40. Charpentieria dyodon dyodon (S. Studer, 1820), Verbano 40.1 whole distal genital organs 40.2 internal distal part of genital organs. Charpentieria dyodon alpina (Stabile, 1859). Val di Lanzo, Usseglio 40.3 whole distal genital organs 40.4 internal distal part of genital organs.