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Trochulus hispidus facts for kids

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Trochulus hispidus
Trochulus hispidus live.jpg
A live individual of Trochulus hispidus (an older adult with most of the hairs worn off of the shell)
Trochulus hispidus 01.JPG
Five views of a shell of Trochulus hispidus
Conservation status
Scientific classification
Synonyms

Trichia hispida
Trochulus sericeus (Draparnaud, 1801)
Trichia sericea (Draparnaud, 1801)

Trochulus hispidus, previously known as Trichia hispida, common name, the "hairy snail", is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Hygromiidae, the hairy snails and their allies.

Distribution

This species occurs in a number of European countries and islands including:

Western Europe:

  • The British Isles: Great Britain and Ireland
  • Netherlands, Belgium, Luxembourg
  • Faroe Islands
  • France
  • Switzerland, Liechtenstein

Northern Europe:

  • Denmark, Norway, Sweden, Finland

Central Europe:

  • Austria, Germany, Czech Republic, Poland, Slovakia, Hungary, Romania

Southern Europe:

  • Andorra, Spain, Italy, Bulgaria

Eastern Europe:

  • Moldova
  • Estonia, Latvia, Lithuania
  • Ukraine
  • Russian Federation (Kaliningrad)

Description

The 3-6 x 5-11 mm shell has 5-6 moderately convex whorls which are rounded or very slightly keeled at the periphery. The aperture has a thin white lip inside. The umbilicus is open and usually wide at 1/8-1/4 of shell diameter. In colour the shell is brown to cream, sometimes with a light band at the periphery. The periostracum is irregularly striated, and densely covered with short (0.2-0.3 mm), curved hairs. These hairs usually remain in the umbilicus if worn away from the rest of the shell. Lost hairs leave pronounced scars.

The animal is brownish grey with a darker anterior part.

Trichia hispida SEM dart
Scanning electron micrograph of the love dart of Trochulus hispidus, Upper image is lateral view - scale bar 500 μm (0.5 mm). Lower image is a cross-section near the base - scale bar 50 μm.

Anatomy

This species of snail creates and uses love darts before mating. The love dart of this species is thorn-shaped.

Shepeleva (2014) studied eyes of Trochulus hispidus.

Ecology

The size of the egg is 1.5 mm.

A hairy snail was found in the plumage of a great tit (Parus major) wintering in southwestern Poland in 2010. This passerine was the smallest bird species reported to carry a gastropod.

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