Islamia cf. I. moquiniana (Dupuy, 1851)
Synonyms: bourguignati, globulina, micrometrica, turgidula…
These empty specimens are among the rare to be – almost – nameable by the shell alone, because the population to which they belong has been studied (Locard, 1889) under the taxon Valvata micrometrica, which is suspected now of being a synonym of globulina… which is suspected itself of being a synonym of moquiniana. Shells collected in sediments at the type-sation of micrometrica: in the brook downstream the karst spring and its pond, Camarade hamlet, south-west of Valence-sur-Baïse, Gers, Occitania, S. France. Altitude ≈ 95m. Sizes: 1,25-1,75-1,6mm.
Left: the Valvata globulina by Paladilhe was – very briefly – described after some texts such as those of Valvata minuta by Férussac (not Drapanaud), the minuta by Dupuy, Drapanaud’s one in Moquin-Tandon, etc. Its main characteristic seems to be a « small globose species » (Paladilhe). Shell minute, with a rather raised spire; umbilicus small in the globulina as it is redescribed by Bodon & al., but widely open in the minuta of Moquin-Tandon.
Right: the Valvata turgidula by A. Locard, who writes: « Shell of small size, subglobose, well depressed above, with a spire barely protruding over the last whorl » etc. But this could be also a minuta (Bodon & al., 2001)…
• Bodon M., Manganelli G. & Giusti F.: “A survey of the European valvatiform hydrobiid genera, with special reference to Hauffenia Pollonera, 1898 (Gastropoda: Hydrobiidae)”, Malacologia vol. 43(1-2), Ann Arbor 2001, p.203.
• Locard A.: “Contributions à la faune malacologique française. XV. Monographie des espèces françaises appartenant au genre Valvata”, Annales de la Société Linnéenne de Lyon vol. 35, Lyon 1888, p.333 for turgidula, p.336 for micrometrica (and p.337 for the station of Camarade pond).
• Moquin-Tandon A.: Histoire naturelle des mollusques terrestres et fluviatiles de France vol. II, Paris 1855, p.543 for both minuta and moquiniana.
• Paladilhe A.: Nouvelles miscellanées malacologiques, part I, Paris 1866, p.27.
Right: the Valvata turgidula by A. Locard, who writes: « Shell of small size, subglobose, well depressed above, with a spire barely protruding over the last whorl » etc. But this could be also a minuta (Bodon & al., 2001)…
• Bodon M., Manganelli G. & Giusti F.: “A survey of the European valvatiform hydrobiid genera, with special reference to Hauffenia Pollonera, 1898 (Gastropoda: Hydrobiidae)”, Malacologia vol. 43(1-2), Ann Arbor 2001, p.203.
• Locard A.: “Contributions à la faune malacologique française. XV. Monographie des espèces françaises appartenant au genre Valvata”, Annales de la Société Linnéenne de Lyon vol. 35, Lyon 1888, p.333 for turgidula, p.336 for micrometrica (and p.337 for the station of Camarade pond).
• Moquin-Tandon A.: Histoire naturelle des mollusques terrestres et fluviatiles de France vol. II, Paris 1855, p.543 for both minuta and moquiniana.
• Paladilhe A.: Nouvelles miscellanées malacologiques, part I, Paris 1866, p.27.