Radix (gastropod)

Ear pond snail (Radix auricularia )

Radix is a genus of the family of mud snails ( Lymnaeidae ) from the subordination of the water snails ( Basommatophora ) ( order snails ( Pulmonata ) ). The genus is widely distributed in the freshwater waters of the northern hemisphere with several species.

Features

The housings have only a few turns. The shape of the housing of the genus ranges from cone- shaped, with large and small threaded opening up to ear -shaped with a very wide mouth and a very small thread. The opening is usually considerably higher than the thread of the housing. They are moderately large (up to about 2.5 cm). The housings are usually also intraspecific highly variable. Thus, the distinction of the individual species is very difficult, and in individual cases, often only by soft tissue investigations possible.

System

The number of species of the genus varies depending on the author. Is in Central Europe Glöer (2002) five kinds of, but which are difficult to distinguish in some cases because of their shape housing. The species can often be determined with certainty only by examination of the bursa stalk. Radix lagotis could previously only be identified by molecular genetic safe as a separate species. After the Fauna Europaea and " Worldwide mollusc species database" contains the genus the following ways:

  • Wide mouthed mud snail (Radix ampla ( Hartmann, 1821) )
  • Ear pond snail (Radix auricularia (Linnaeus, 1758) )
  • Common pond snail (Radix balthica (Linnaeus, 1758) )
  • Radix hamadai Have, 1968
  • Radix japonica Jay, 1857
  • Radix Jordii Altaba, 2007
  • Alpine pond snail (Radix labiata ( Rossmaessler, 1835) )
  • Lean pond snail (Radix lagotis (cabinet, 1803) )
  • Radix lilli Glöer & Beckmann, 2007
  • Radix linae Altaba, 2007
  • Radix luteola Lamarck, 1799
  • Radix Onychia ( Westerlund, 1887)
  • Radix parapsilia Vinarski & Glöer, 2009
  • Radix peregra (Müller, 1774)
  • Radix pinteri Schütt, 1974
  • Radix plicatula Benson, 1842
  • Radix quadrasi ( Mollendorff )
  • Radix relicta Polinsky, 1929
  • Radix rubiginosa ( Michelin, 1831)
  • Radix Scutari Glöer & Pešić, 2008

Parasites

The species of the genus Radix may be intermediate hosts for larval trematodes of Trichobilharzia ocellata, which also infect humans mistakenly as an intermediate host. To activate the so-called bath dermatitis, which is unpleasant for the people, however harmless and will only lead to a reddening of the skin. The actual hosts for Trichobilharzia ocellata are water birds.

Heterobranchia Trematoda Swimmer's itch
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