The body of this semi-slug is too large to be contained in the very flat and depressed ear-shaped shell. The shell body whorl is ¾ of the total breadth viewed from above. It is very thin, fragile and transparent. Shell colour is greenish or yellowish. The shell aperture has a mouth membrane which runs from the umbilicus along the inside of the outer lip. The animal is pale to dark grey or black, paler forms have large dark grey areas. The mantle lobe is very large. Genitalia:Penis with appendix, joins vagina below the insertion of spermatheca duct.[1]
Distribution and habitatEdit
This species is known to occur in Brittany, the French Pyrenees, Andorra, Spain and southwestern Ireland. This is called a Lusitanian distribution and was at one time thought to represent the survival of species in an ice-free land mass that served as a refugium during the last ice age. This theory has now been discredited as Ireland is thought to have been entirely covered by ice during the height of the Quaternary glaciation. It now seems likely that these species were re-introduced into Ireland after the last glaciation, probably accidentally with human migration in the late Paleolithic or early Mesolithic.[2] It typically inhabits humid and shady places, between rocks, or in Ireland in woodland amongst moist ground litter, usually on non-calcareous soils. It is not usually found in areas grazed by livestock.[1]
ReferencesEdit
^ ab"Semilimax pyrenaicus (Férussac, 1821)". AnimalBase. Retrieved 18 April 2020.
^Reich, Inga; Gormally, Michael; Allcock, A. Louise; McDonnell, Rory; Castillejo, José; Iglesias, Javier; Quinteiro, Javier; Smith, Cindy J. (2015). "Genetic study reveals close link between Irish and Northern Spanish specimens of the protected Lusitanian slug Geomalacus maculosus". Biological Journal of the Linnean Society. 116 (1): 156–168. doi:10.1111/bij.12568.
semilimax, pyrenaicus, species, breathing, land, snail, terrestrial, pulmonate, gastropod, mollusk, family, vitrinidae, large, greyish, brown, snail, that, cannot, fully, retract, into, shell, scientific, classificationkingdom, animaliaphylum, molluscaclass, g. Semilimax pyrenaicus is a species of air breathing land snail a terrestrial pulmonate gastropod mollusk in the family Vitrinidae It is a large greyish brown snail that cannot fully retract into its shell Semilimax pyrenaicusScientific classificationKingdom AnimaliaPhylum MolluscaClass Gastropoda unranked clade Euthyneuraclade Panpulmonataclade Eupulmonata clade Stylommatophora informal group Sigmurethra clade limacoid cladeSuperfamily LimacoideaFamily VitrinidaeGenus SemilimaxSpecies S pyrenaicusBinomial nameSemilimax pyrenaicus A Ferussac 1821 SynonymsVitrina hibernica J Taylor 1908 Contents 1 Description 2 Distribution and habitat 3 References 4 External linksDescription EditFor terms see gastropod shell The body of this semi slug is too large to be contained in the very flat and depressed ear shaped shell The shell body whorl is of the total breadth viewed from above It is very thin fragile and transparent Shell colour is greenish or yellowish The shell aperture has a mouth membrane which runs from the umbilicus along the inside of the outer lip The animal is pale to dark grey or black paler forms have large dark grey areas The mantle lobe is very large Genitalia Penis with appendix joins vagina below the insertion of spermatheca duct 1 Distribution and habitat EditThis species is known to occur in Brittany the French Pyrenees Andorra Spain and southwestern Ireland This is called a Lusitanian distribution and was at one time thought to represent the survival of species in an ice free land mass that served as a refugium during the last ice age This theory has now been discredited as Ireland is thought to have been entirely covered by ice during the height of the Quaternary glaciation It now seems likely that these species were re introduced into Ireland after the last glaciation probably accidentally with human migration in the late Paleolithic or early Mesolithic 2 It typically inhabits humid and shady places between rocks or in Ireland in woodland amongst moist ground litter usually on non calcareous soils It is not usually found in areas grazed by livestock 1 References Edit a b Semilimax pyrenaicus Ferussac 1821 AnimalBase Retrieved 18 April 2020 Reich Inga Gormally Michael Allcock A Louise McDonnell Rory Castillejo Jose Iglesias Javier Quinteiro Javier Smith Cindy J 2015 Genetic study reveals close link between Irish and Northern Spanish specimens of the protected Lusitanian slug Geomalacus maculosus Biological Journal of the Linnean Society 116 1 156 168 doi 10 1111 bij 12568 External links Edit nbsp Wikispecies has information related to Semilimax Semilimax pyrenaicus at Animalbase taxonomy short description distribution biology status threats images Info on Irish occurrence 1 Fauna Europaea Search Distribution Photo of live individual at 2 Retrieved from https en wikipedia org w index php title Semilimax pyrenaicus amp oldid 1133130814, wikipedia, wiki, book, books, library,
![[2]](https://archive.today/20130123165300/http://www.freewebs.com/worldofsnails/British%20Snails%20page/vitrinapellucida.jpg){kind=link}