Zonitoides nitidus

Zonitoides nitidus (sometimes Zonitoides nitida)[3] is a species of small, air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Gastrodontidae.

Zonitoides nitidus
Two shells of Zonitoides nitidus
NE[1]
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Heterobranchia
clade Euthyneura
clade Panpulmonata
clade Eupulmonata
clade Stylommatophora
informal group Sigmurethra
clade limacoid clade
Superfamily:
Gastrodontoidea
Family:
Gastrodontidae
Genus:
Zonitoides
Subgenus:
Zonitoides
Species:
Z. nitidus
Binomial name
Zonitoides nitidus
(Müller, 1774)[2]

Zonitoides nitidus is the type species of the genus Zonitoides.

Distribution

The distribution of Zonitoides nitidus includes the Holarctic zone. It is found almost all over Europe except the southernmost regions:[4]

The non-indigenous distribution of this species includes:

  • introduced to Menorca[4]

Description

The shell is reddish brown.[4] The umbilicus is large (almost 25% of shell diameter).[4] The shell is with radial growth lines.[4] The width of the shell is 6–7 mm.[4] The height of the shell is 3.5-4.0 mm.[4]

The animal is black with a characteristic orange dash: the (mantle gland is visible under the shell's aperture).[4]

Juveniles are whitish grey with light brown translucent shells.[4]

Photo of the shell.
Drawing of the shell.

Ecology

Zonitoides nitidus occurs in wet meadows and river woods, usually near water bodies, swamps and swampy forests, in the zone of emergent vegetation.[4] Man-made habitats such as pools in old quarries are sometimes colonized after a few years.[4] In Switzerland it is found up to 2100m of altitude.[4]

Zonitoides nitidus is herbivorous.[4] These snails feed on disintegrating leaves, mushrooms, roots and fruit.[4] They do not eat dry leaves.[4] Humid leaves are preferred.[4] When consuming soft food such as mushrooms or soft fruits, Zonitoides nitidus penetrates perpendicularly inside, producing characteristic holes; the entire animal including its shell can penetrate inside the fruit.[4]

In Germany up to three clutches of 2-9 eggs per individual are laid in all seasons, with some days or weeks spacing between egg-laying.[4] Egg diameter is 1.0-1.6 mm.[4] Eggs are laid loose into the soil.[4] Juveniles have 1.5 whorls (diameter 1-1.2 mm) after hatching.[4] They start feeding on disintegrating plant remains in the soil.[4] After 3 months the shell diameter reaches up to 3 mm under favourable conditions, after 10 months 6 mm, and full size after slightly more than one year.[4] Maximum age is 18 months under laboratory conditions.[4]

Parasites of Zonitoides nitidus include:

gollark: Less so, since you can do some of the work closer to the data and not have to move it much.
gollark: I would look it up, except I have no idea what search queries to try.
gollark: The thing I was looking at involved sticking somewhat general-purpose computers into the RAM chips, not just having dedicated analog computers for things.
gollark: I've heard about more general ways to achieve similar sorts of thing, like sticking HBM stuff onto GPUs and some computing-in-memory thing.
gollark: And brains are annoying to do things with since they're not understood very well and can't be copied/run in simulation very easily.

References

This article incorporates public domain text from the reference.[4]

  1. 2006 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Cited 4 March 2007.
  2. Müller O. F. 1774. Vermivm terrestrium et fluviatilium, seu animalium infusoriorum, helminthicorum, et testaceorum, non marinorum, succincta historia. Volumen alterum. pp. I-XXVI [= 1-36], 1-214, [1-10]. Havniæ & Lipsiæ. (Heineck & Faber).
  3. "Zonitoides nitida". Utah Division of Wildlife Resources. Archived from the original on 2017-05-19. Retrieved May 18, 2017.
  4. "Species summary for Zonitoides nitidus". AnimalBase, last modified 29 August 2010, accessed 3 September 2010.
  5. Juřičková L., Horsák M. & Beran L. (2001). "Check-list of the molluscs (Mollusca) of the Czech Republic". Acta Soc. Zool. Bohem. 65: 25-40.
  6. "Anemoon > Flora en Fauna > Soorteninformatie". www.anemoon.org.
  8. Balashov I. & Gural-Sverlova N. 2012. An annotated checklist of the terrestrial molluscs of Ukraine. Journal of Conchology. 41 (1): 91-109.
  9. Olsson I.-M., Stéen M. & Mann H. (1993). "Gastropod hosts of Elaphostrongylus spp. (Protostrongylidae, Nematoda)". Rangifer 13(1): 53-55. PDF.
  10. Michigan Department of Natural Resources and Environment. "Brainworm". accessed 14 December 2010.
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