Bithinia moutonii Dupuy, 1849

Boeters, Hans D. & Falkner, Gerhard, 2017, The genus Mercuria Boeters, 1971 in France (Gastropoda: Caenogastropoda: Hydrobiidae). West-European Hydrobiidae, Part 13, Zoosystema 39 (2), pp. 227-261 : 251

Bithinia moutonii Dupuy, 1849

( Fig. 11D, E )

Bithinia [sic] moutonii Dupuy, 1849 : [1].

TYPE LOCALITY. — Not mentioned in the original description, but “Galliae” according to title of Catalogus. From Dupuy (1851: 553) the following type locality can be reconstructed: “Habit. Les eaux tranquilles de la France méditerranéenne, les environs de Grasse, marais de la Népoule (Mouton), etc.”

TYPES. — Syntypes unknown. For topotypes compare Fig. 11D (“Cannes” corresponds to Siagne at Mandelieu-la-Napoule; MNHN- LOC) and Fig. 11E (Var, Grasse; MNHN-JOU) .

REMARKS

It would be of interest to clarify whether the ecological indication “les eaux tranquilles” might differentiate Dupuy’s species from M. meridionalis .

A sample in the Collection Dupuy (MHNT-DUP) ( Astre 1921: 262) from Draguignan is not regarded as syntypes, since it does not come from the reconstructed type locality.

Grasse was the domicile of the collector Mouton and the “marais de la Népoule” is surely identical with the historical Étang de la Napoule which is described by Desmarest (1811: 98) as “ancien lit” of the lower course of the river Siagne and as a pestilential swamp consisting of “une infinité de petites mares”. The spelling variant “Népoule” instead of “Napoule” is at least documented by the geologist Coquand (1836: 111). In this context it should finally be mentioned that the Collection Pascal (MNHN-PAS) comprises a sample of Mercuria from Mandelieu[-la-Napoule] (MNHN-PAS/3 ex de Folin [5]).

A large sample has been collected before 1875 by A. Macé in the Siagne near its embouchure between Cannes and La Napoule ; from this material a large lot of 149 specimens was donated to Mousson ( ZMH 524050 and 524051). As the shells with indication of locality “Cannes” in the collection Locard ( MNHN-LOC) show an identical mud coating it can be presumed that they stem from the same sampling .

There do not exist any recent reports of Mercuria from Grasse and its environs.

Pseudamnicola (Pseudamnicola) emilianus

Figures

FIG. 11. — A-C, Mercuria meridionalis (Risso, 1826), France, Var, Foux de Draguignan, leg. Boeters 27.IX.1969, BOE 2414 ex 0261 (A, B); BOE 2151 ex 0261 (C); A, ♀; B, ♂; C, ♂, pallial tentacle, copulatory organ and pedal lobe clearly to be seen; D, E, Mercuria sp., presumable topotypes of Bithinia [sic] moutonii Dupuy, 1849; D, France, Alpes-Maritimes, Cannes (i.e. Mandelieu-la-Napoule [Népoule sensu Dupuy]), ♀ (MNHN-LOC); E, France, Var, Grasse (MNHN-JOU); F, Mercuria corsensis n. sp. France, Corse-du-Sud, Bonifacio, Couvent de la Trinité, leg Boeters IX.1979 (holotype MNHN-IM-2000-31951 ex BOE 0916); G-H, Mercuria zopissa (Paulucci, 1882), Italy, Sardinia, Monte dei Sette Fratelli, leg Giusti, Topotypes ex SMF 252038/7; G, globular shell; H, slender shell; I-J, Pseudamnicola emiliana (Paladilhe 1869); I, Neotype ex Topotype; France, Hérault, ruisseau [d’eaux douces] près de Balaruc (MNHN-IM-2000-32541 ex de Folin); J, de Folin’s label [“determ. par Paladilhe”, handwriting de Folin]. Scale bars: A, B, D-I, 3 mm; C, 1 mm.