Stigmatica paestana intustructa (Westerlund, 1883)

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

Stigmatica paestana intustructa (Westerlund, 1883)

Figs 62.4, 62.5, 64.2

Distribution.

This taxon is present in Basilicata, known from the area surrounding Balvano (Italy) ( Nordsieck 2013b: 7).

Specimens examined.

Italy, Basilicata, Potenza, Balvano , near the castle. 450 m asl, 40°39'01.23"N, 15°30'38.91"E, W. De Mattia and J. Macor leg. and det., 3 dissected spm ; Italy, Basilicata, Potenza , Balvano. 450 m asl, 40°38'40.44"N, 15°30'39.09"E, I. Niero leg. and det., 2 dissected spm .

External morphology of the genital organs

(Fig. 62 .4). The V is much shorter than the FO. The FDBC is longer than the SDBC+BC. The BC+SDBC is slightly club-like in shape, with a more or less clear distinction between the SDBC and the BC. The D is much longer than the SDBC+BC and much thinner. The V is short but wide in diameter. The PC is ~ 4 × longer than the V. The P is cylindrical and slightly swollen. The transition between P and EP is clearly visible with a narrowing and the presence of the ER. The PR is short and robust. The E is longer than the P.

Internal morphology of the genital organs

(Fig. 62 .5). The V, the A and the P lack any macro-sculpturing. The internal surface shows a coarse fine granulation. The pseudopapilla is elongated and with a smooth surface. It originates directly from the wall of the E. Its basis is connected with one ELP. The E shows two moderately fringed ELP. They proximally fade before the VD. The epiphallar formula is PP(ELP).

Remarks.

Stigmatica paestana intustructa shows an anatomy of the genital organs very similar to the nominate subspecies.

Figures

Figure 62. Stigmatica paestana paestana (Philippi, 1836), Monte Argentario, Grosseto 62.1 whole distal genital organs 62.2 internal distal part of genital organs 62.3 cross section of the epiphallus. Stigmatica paestana intustructa (Westerlund, 1883), Balvano, Potenza 62.4 whole distal genital organs 62.5 internal distal part of genital organs.