Abstract
Sinanodonta woodiana (Lea) and Corbicula fluminea (O. F. Müller) are among the most invasive aquatic molluscs found in Europe. Both species were recorded in the Adriatic part of Croatia for the first time in 2019 although in the Danubian Croatia they were more common. An abundant population of S. woodiana was found in an oxbow of the Cetina River; mussels with shell length of ca. 12–17 cm dominated. A population of C. fluminea was recorded in the freshwater section of the Zrmanja River above the Jankovića Buk waterfall which forms the border between the brackish and the freshwater sections of the river. Possible pathways of their introduction and reasons for their rare occurrence in contrast to the Danubian Croatia are discussed.
Highlights
Azecids, a small group of litter and topsoil snails, can be found in Europe from the British Isles southward to the Iberian Peninsula and eastward to the western part of the Balkan Peninsula, as well as in North Africa from Morocco to Algeria (Holyoak & Holyoak 2012, Welter-Schultes 2012, Štamol et al 2018, Manganelli et al 2019)
Hypnophila should be divided in two: Gomphroa Westerlund, 1902 and Hypnophila s.str. The former occurs in the western Mediterranean area and includes nine western Hypnophila species, namely G. bisacchii (Giusti, 1970), G. boissii (Dupuy, 1851), G. cylindracea (Calcara, 1840), G. dohrni (Paulucci, 1882), G. emiliana (Bourguignat, 1859), G. etrusca (Paulucci, 1886), G. incerta (Bourguignat, 1859), G. malagana (Gittenberger et Menkhorst in Gittenberger, 1983) and G. remyi (Boettger, 1949), plus the Dalmatian G. zirjensis (Štamol, Manganelli, Barbato et Giusti, 2018)
Two new c oxidase subunit I (COI), four 5.8S+ITS2+28S and four H3 sequences were obtained from the specimens of H. pupaeformis from Croatia and deposited in GenBank (Table 1)
Summary
A small group of litter and topsoil snails, can be found in Europe from the British Isles southward to the Iberian Peninsula and eastward to the western part of the Balkan Peninsula, as well as in North Africa from Morocco to Algeria (Holyoak & Holyoak 2012, Welter-Schultes 2012, Štamol et al 2018, Manganelli et al 2019). Hypnophila should be divided in two: Gomphroa Westerlund, 1902 and Hypnophila s.str The former occurs in the western Mediterranean area and includes nine western Hypnophila species, namely G. bisacchii (Giusti, 1970), G. boissii (Dupuy, 1851), G. cylindracea (Calcara, 1840), G. dohrni (Paulucci, 1882), G. emiliana (Bourguignat, 1859), G. etrusca (Paulucci, 1886), G. incerta (Bourguignat, 1859), G. malagana (Gittenberger et Menkhorst in Gittenberger, 1983) and G. remyi (Boettger, 1949), plus the Dalmatian G. zirjensis (Štamol, Manganelli, Barbato et Giusti, 2018). The latter – with the other four Hypnophila species: H. pupaeformis (Cantraine, 1835), H. polita (Porro, 1838), H. cyclothyra (Boettger, 1885) and H. zacynthia (Roth, 1855) – is known from the western Balkan Peninsula, islands included
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