Moitessieria guilhemensis
Callot-Girardi & Bœters, 2017 |
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| Known distribution: Saint-Guilhem-le-Désert, Hérault. The type-locality is le Cabrier karst spring, along the western bank of Hérault river, upstream Saint-Guilhem. Altitude ≈ 80m. The species has never been found alive. Above: specimen collected in sediment at the emergence. 1,9mm. |
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Comparison between a guilhemensis (2,1mm) and a rolandiana Bourguignat, 1863 from the same deposit (1,9mm). Instead of being shallow and spirally x radially arranged in rolandiana, the cupules of guilhemensis are deep and scattered along the spirals in a way that gives rise to some moire. This is especially marked on the subsutural ramp. |
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Left: Moitessieria guilhemensis 1,9-1,7mm.
Right: Moitessieria rolandiana 2,1mm. |
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Left: Moitessieria guilhemensis. Right: Moitessieria rolandiana.
Original pictures provided by A. Bertrand (FR) – (CC BY-NC-SA). |
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| Le Cabrier. Moitessieria guilhemensis at left, subadult rolandiana at right. 1,8-1,5mm. |
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| Le Cabrier karst spring. This is the emergence of the system Boulidou-Sergent. |
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Subfossils from the Source du Bout du Monde, Verdus creek, Saint-Guilhem-le-Désert.
Altitude ≈ 150m. 1,75-1,82-1,85mm.
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