Acicula fusca
Brown Mulmnadel ( acicula fusca )
The Brown Mulmnadel ( acicula fusca ), also brown needle worm, is a living on the land snail from the family of Mulmnadeln ( Aciculidae ) in order Architaenioglossa ("old Bandzüngler ").
- 5.1 Literature
- 5.2 Notes and references
- 5.3 online
Features
The (adult ) body is 2.0 to 2.95 mm height and 0.9 to 1.0 mm Ready ( thickness ) is very small. It has 5-5 ¾ slightly convex whorls, the outside thus extends approximately straight and gives a spindle shape. The Protokonch is smooth, the following whorls have an irregular Rillenstreifung on ( 15 to 23 grooves on the penultimate handling ). The last whorl does not increase or only very few in from the coil axis. Below the seam interpret the whorls on an edge. The umbilicus is very narrow, ritz -shaped open. The mouth is pear-shaped in front view, the mouth slightly edge in the side view bulged. He turned up in the navel area and basal expanded somewhat, but not thickened inside lipped. Also a neck ridge is absent or only very weakly indicated. The very thin Parietalkallus is clearly limited towards the mouth. The case is matte red - brown to yellowish- red, thin and translucent, the surface shiny.
Similar Species
The Brown Mulmnadel can easily match the Striped Mulmnadel ( acicula lineata ) are confused. However, this has a weak neck ridge, a closed umbilicus and is larger on average. Opposite acicula parcelineata A. fusca has a reddish brown gedrungeneres housing. In the side view of the opening edge is bent back more directly below the suture.
Geographical distribution and habitat
The range of the species extends from the Cantabrian Mountains ( Spain ) in the west, across the Pyrenees, more or less closed over western and northern France, the UK and Ireland to Belgium, West Germany (North Rhine -Westphalia) and the southernmost tip of the Netherlands ( extreme south of the province Limburg). Fossil is the kind known since the Burdigalian in Germany and the Czech Republic.
The species prefers moist habitats in old deciduous forests that do not dry out in the summer, where they live in deeper and undisturbed leaf litter. In the UK and Ireland, it also occurs in more exposed locations, such as on rocks by the sea and in the moss along roadsides. They often occur on calcareous soils, occasionally also on basalt.
Taxonomy
The taxon was described in 1803 by George Montagu as Turbo fuscus first time. Synonyms are Acme inchoata Ehrmann, 1933 Bulimus minutus T. Brown, 1827 Acme pyrenaica De Folin & Berillon, 1877.
Endangering
The species is conducted in Germany in the category R ( = extremely rare). On the Red List of the EU is the kind with LC ( = Least Concern, " not at risk " ) classified. However, a decline in the populations was observed by 55 % in Ireland, for which it is rated for Ireland as " Vulnerable " ..