Stigmatica stigmatica sturmii (L. Pfeiffer, 1848)

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

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Stigmatica stigmatica sturmii (L. Pfeiffer, 1848)


Stigmatica stigmatica sturmii (L. Pfeiffer, 1848)

Figs 60.1, 60.2, 61.4 View Figure 60


This taxon is restricted to the Salento (Puglia, Italy) and central Albania with the type form ( Nordsieck 2013a: 6).

Specimens examined:

Italy, Puglia, Brindisi, Punta Penne next to the Airport. 5 m asl, 40°40'31.60"N, 17°56'40.44"E, [Lab ID 12194_1, COI: MW758949 View Materials , ITS2: MW757053, MW757054 ; Lab ID 12194_2, COI: MW758950 View Materials ], H. Nordsieck leg. and det. 2 dissected spm GoogleMaps .

External morphology of the genital organs

(Fig. 60 View Figure 60 .1). The V is shorter than the FO. The FDBC is longer than the SDBC+BC. The BC+SDBC is 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 slightly thinner. The V is moderately long and thin in diameter. The PC is ~ 2 × longer than the V. The P is slim and cylindrical. The transition between P and EP is not visible. The PR is long and robust. The E is shorter than the P and thinner in diameter.

Internal morphology of the genital organs

(Fig. 60 View Figure 60 .2). The V is smooth. The P shows a single smooth longitudinal pleat that reaches the atrium. The pseudopapilla is elongated with an irregular surface. It originates from the E wall. The epiphallar formula is PP+ELP. The E shows two smooth ELP. They proximally fade before the VD.


The morphology of the genital organs of this population is remarkably different from all other Stigmatica , and it shows high affinity with the genus Gibbularia . This is also suggested by the ITS2 tree, where G. gibbula gibbula from Apricena and this population cluster together implying that this population might were misidentified and belongs to the genus Gibbularia . However, in the COI tree, S. s. sturmii forms a very distant lineage. Thus, this taxon certainly deserves thorough investigation with a larger sample size.