Page 11 - 4(4)_483-500_Maio_Petraccioli_2013

New faunistic data on Trochoidea (Trochoidea) caroni (Deshayes, 1832) (Gastropoda Pulmonata Hygromiidae) 493

Figures 29-31. Shell of Trochoidea trochlea from Annaba (Algeria), Löbbecke Museum, Düsseldorf, Germany, height 8.1
mm, diameter 10.2 mm: apertural view (Fig. 29), umbilical view (Fig. 30), apical view (Fig. 31). Figure 32. Figure n. 1470
of Helix trochlea from plate 146 in Kobelt (1877).

are also noteworthy. In particular, the latter authors Olevola near Terracina) and the fossil reports from
write: “Rara: gli esemplari che possediamo ci son per- Capri by Segre (1959) attributed by him to the
venuti da Palermo ad eccezione di un solo ritrovato Lower Pleistocene, when Capri was joined to the
nella plaia di Catania. Diam. lin. [Linea siciliana (o Sorrentina peninsula (Barattolo et al., 1992; Ca-
linia) = 1.79234583 mm] 5 ½ [= 9.86 mm], altezza passo Barbato & Gliozzi, 1995). This report there-
lin. 2 ½ [=4.48 mm] (h/d: 0.46). Coll. (A.G.) [= fore demonstrates the ancient presence of the
Abate Emiliano Guttadauro?]". Philippi (1836) also species on the island of Capri.
reports it with the name Carocolla elegans Lamk. Of similar interest is the finding of fossil speci-
from Palermo and Pantelleria Island. The same mens on Malta, which may demonstrate colonisa-
citation is repeated by Monterosato (1893) with the tion from Sicily during the Quaternary (Giusti et al.,
comment “Non è stato più ritrovata, né credo si 1995; Hunt, 1997; Kolouch, 2003). T. caroni may
trovi”. have been present on the island until last century at
least, as historical reports from the mid and late
nineteenth century suggest (Gulia, 1874; Feilden,
DISCUSSION 1879).
Reports from North Africa are also interesting
On the basis of the data collected, the current dis- but require further confirmation, since local forms
tribution of T. caroni, limited to Capri and Sicily of T. trochlea or other taxa cannot be excluded.
(Manganelli et al., 1995), proves to be much wider Reports from the Balearic Islands cannot be
(Fig. 33). In peninsular Italy, new sites of collection verified since the original specimens cited in the
are in fact reported: one at Terracina with live speci- papers could not be traced.
mens, one at Spigno Saturnia with many fresh In the light of this new data, it is possible to say
empty shells, one in Sorrento with two empty shells that the distribution of T. caroni is certainly wider
of juveniles, one at Castagneto Carducci with a than hitherto known, although it is not yet possible
shell of an adult specimen, one at Manfredonia with to draw conclusions on the origin and spread of this
a shell in a museum collection, dating to 1878, and population. Likewise for T. trochlea and T. elegans
a bibliographic specimen from Ischia, dating to with elevated spires, it is impossible to determine
1822–1830. It is also important to mention the re- the correct systematic, phylogenetic and biogeo-
ports by Statuti (1882: Porto Badino and Torre graphic position of the taxa and their effective rela-