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Image of Monacha obstructa (L. Pfeiffer 1842)
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Monacha obstructa (L. Pfeiffer 1842)

Description

provided by Zookeys
shell medium sized, spire broadly conical and somewhat elevated; protoconch consisting of 1.5 smooth whorls; teleoconch cream white, with faint riblets and a malleate sculpture (compare to Monacha syriaca), and evenly rounded whorls; last whorl slightly bending towards the aperture; aperture broadly oval, reinforced by a thick white labial callus, well discernible from the outside as a thick white callosity; peristomial rim sharply bounded, red; umbilicus closed, but last whorl forming a characteristic funnel-shaped “pseudo-umbilicus”. Measurements (Fig. 9): H = 6.68; D = 11.83; PH = 4.2; PD = 5.85.
license
cc-by-3.0
copyright
Eike Neubert, Michel Bariche
bibliographic citation
Neubert E, Bariche M (2013) On the Monacha species of Lebanon (Gastropoda, Hygromiidae) ZooKeys 311: 1–18
author
Eike Neubert
author
Michel Bariche
original
visit source
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Zookeys

Distribution

provided by Zookeys
In Lebanon this species seems to be quite restricted, probably because it is confined to more arid or steppe-like areas like central Syria, where it is one of the most abundant snail species. These environmental conditions are not present in the western part of Lebanon with its humid and steep mountain slopes. However, it is the most widespread species within Monacha. Its distribution ranges from Egypt to Pakistan, and Turkey to Saudi Arabia (Neubert 1998), probably because it can be easily distributed by human activities.
license
cc-by-3.0
copyright
Eike Neubert, Michel Bariche
bibliographic citation
Neubert E, Bariche M (2013) On the Monacha species of Lebanon (Gastropoda, Hygromiidae) ZooKeys 311: 1–18
author
Eike Neubert
author
Michel Bariche
original
visit source
partner site
Zookeys