Theodoxus marteli (Pallary, 1920)
Northern Morocco.
Grazer, on stones and rocks in freshwater streams.
Original taxon: Neritina marteli.
 
« Shell conical but with a spire not much protruding. Whorls 3½, little rounded, uncoiling quickly, adorned with very dense zigzag or undulating lineoles of a dark reddish brown, standing out against the porcellanous background of the test. Last whorl big, well convex and forming on its own the ¾ of the total shell height. Aperture oblique, forming a regular oval inclined towards the base rather than horizontally elongated, and white; peristome thin, sharp; operculum solid, shiny, light reddish yellow. » – P. Pallary: “Récoltes malacologiques du capitaine Paul Martel dans la partie septentrionale du Maroc”, Journal de Conchyliologie vol.65, Paris 1920, p.154.

A specimen from the river Fez, Fès-Meknès Region, N. Morocco. 9,5mm.
The species in Pallary, plate II.
Other stations in the area: Ras Elma, Ain Cheggag…
Oued Fez. 9,25mm.

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