MolluscIreland - land and freshwater
  • Boettgerilla pallens Simroth 1912 Worm slug
Click on the thumbnails to enlarge the images
Boettgerilla pallens
© Dr Roy Anderson
Boettgerilla pallens
© Dr Roy Anderson
Boettgerilla pallens
© Dr Roy Anderson

Map hosted by the National Biodiversity Data Centre, Waterford
To view the species profile on Biodiversity Maps and access the live map, please click on the map.

Boettgerilla pallens
© Dr Roy Anderson
 

A very slender medium-sized keeled slug, pale grayish-yellow in colour, sometimes with a bluish tinge and with a slightly darker head, back and keel. A soil species from south-east Europe, accidentally introduced to Ireland in the 1970s.

Key characteristics

  • A very slender greyish or bluish-grey keeled slug with slightly darker head and back and translucent sides with yellowish internal organs showing through
  • The keel is full length between the back of the mantle and the tail and is the same colour as the back
  • Rear of the mantle comes to a broad point
  • Mantle with a deep V-shaped groove, but also marked by 'finger-print' concentric grooves
  • Sole pale, mucus colourless

Size

35-55 mm.

World Distribution

Originally south-east European but spread via human activities to most of western Europe within the last century.

Irish Distribution

Very local but increasingly widespread in disturbed sites. First recorded in Ireland in 1973 from Mount Stewart on the Co. Down coast (Anderson & Norris, 1974). Reported from Britain in the previous year and now very widespread there (Kerney, 1999). It appears to be commoner in the southern counties of Ireland than in the north.

Ecology

  • This distinctive, worm-like slug is predominantly soil-dwelling
  • Most recorded sites are in rubbishy or waste places but there are records for rough pasture and woodland
  • Usually seen only when deeply embedded stones are turned over

Red List status

  • Not applicable

Wikipedia link

Wikipedia page for Boettgerilla pallens

 Anderson, R., (2016). Boettgerilla pallens Simroth 1912. [In] MolluscIreland.
http://www.habitas.org.uk/molluscireland/species.asp?ID=46 Accessed on 2017-10-19.