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MALACOLOGIA, 2001 , 43(1-2): 103-215 A SURVEY OF THE EUROPEAN VALVATIFORM HYDROBIID GENERA, WITH SPECIAL REFERENCE TO HAUFFENIA POLLONERA, 1898 (GASTROPODA: HYDROBIIDAE) Marco Bodon, Giuseppe Manganelli & Poico Giusti Dipartimento di Biología Evolutiva, Università di Siena, Via Mattioli 4, 1-53100 Siena, Italy; giustif@unisi.it ABSTRACT All the taxa of genus and species groups introduced for the European valvatiform hydrobiids are analyzed, and if possible revised. All the type species have been redescribed on the basis of new anatomical studies or data in the literature when spirit specimens were not available. This enabled the following taxa to be rec- ognized as junior synonyms of Hauffenia Pollonera, 1898 (type species Horatia (Hauffenia) tellinii PoWonera. 1898): Erythropomatiana Radoman, 1978 (type species Valvata erythropoma- tia Hauffen, 1856): Lobaunia Haase, 1993 (type species: Lobaunia danubialis Haase, 1993); Neohoratia Schutt, 1961 (type species Valvata (?) subpiscinalis Kuscer, 1932): and Vran/a Rado- man, 1978 (type species Valvata wagneri Kuscer, 1928). Of the species currently assigned to Hauffenia, only a few from the eastern Alps and Balkans actually belong to it: H. erythropomatia (Hauffen, 1856): H. /cerschner/ (Zimmermann, 1930): H. media Bole, 1961; H. subcarinata Bole & Velkovrh, 1987; H. subpiscinalis ( Kuscer, 1932); H. tellinii (Pollonera, 1898) (with H. michleh Kuscer, 1932, as junior synonym); H. tovunica Rado- man, 1978; H. wagneri (Kuscer, 1928); and H. wienerwaldensis Haase, 1992. Each is re- described. Many '^Hauffenia" species from the Balkans remain of uncertain generic status due to the ab- sence, or incompleteness of anatomical data. However, Horatia (Hauffenia) raefilei Schutt, 1980, is placed in the genus Fissuria Boeters, 1981 , on the basis of its anatomy. After anatomical study, most of the French "Hauffenia" have been assigned to Islamia Rado- man, 1973a, and tentatively to the following species: /. minuta (Draparnaud, 1805), /. globulina (Paladiihe, 1866), /. spirata (Bernasconi, 1985), and /. consolationis (Bernasconi, 1985). Anatomical study of the French "Horatia" exilis (Paladiihe, 1867) supports its allocation to a new genus: Heraultia, n. gen. The Spanish species currently assigned to "Horatia" or "Neohoratia" do not belong to these genera. Some of them, namely "Л/." afen/ (Boeters, 1969), "/V." globulus globulus (Bofill, 1909), and "Л/." g. /agar/ (Altimira, 1960), belong to Islamia. Diagnoses and keys are provided for the European valvatiform hydrobiid genera and for the species of Hauffenia, together with tables summarising their taxonomic status and distribution. Key words: Gastropoda, Caenogastropoda, valvatiform Hydrobiidae, taxonomy, systematics, geographical distribution, Europe. INTRODUCTION The European fauna is particularly rich in valvatifornn stygobiont hydrobiids (Radoman, 1983; Bole & Velkovrh, 1986). The first species discovered were assigned to the het- erobranch valvatid genus Valvata Müller, 1774, until the first hydrobiid genera were de- scribed. Since the 1950s, a plethora of new genera and new species have been intro- duced. This produced a puzzling taxonomic picture, with genera established on shell and/or few anatomical characters, frequent changes of rank of many supraspecific taxa. and species (including extra-European; see Bole & Velkovrh, 1986) assigned to genera on the basis of non-diagnostic characters. In an attempt to reduce this taxonomic chaos, we set out to revise all the taxa related to one of the oldest established genera, Hauffenia Pol- lonera, 1898. Hauffenia was introduced by Pollonera (1898) as a subgenus of Horatia Bourguignat, 1887, for two new hydrobiids, collected by A. Tellini in the debris of the upper course of the Natisone River, Friuli, northeastern Italy: Ho- ratia tellinii and H. valvataeformis. Kuscer (1932, 1933a, b) ranked Hauffenia 103

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A survey of the European valvatiform hydrobiid genera, with special reference to Hauffenia Pollonera, 1898 (Gastropoda: Hydrobiidae)

Malacologia 43: 103-215 (2001)

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