Planorbarius corneus

Planorbarius corneus
A live individual of Planorbarius corneus, carrying the shell with the umbilicus uppermost
Conservation status
NE
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Heterobranchia clade Euthyneura clade Panpulmonata clade Hygrophila
Superfamily:	Planorboidea
Family:	Planorbidae
Genus:	Planorbarius
Species:	P. corneus
Binomial name
Planorbarius corneus (Linnaeus, 1758)[1]
Subspecies
Planorbarius corneus corneus (Linnaeus, 1758) Planorbarius corneus grandis (Dunker, 1850)
Synonyms
Coretus corneus (Linnaeus) Planorbis corneus

Planorbarius corneus, common name the great ramshorn, is a relatively large species of air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails, or planorbids, which all have sinistral or left-coiling shells.

The shell of this species appears to be dextral in coiling, even though it is in fact sinistral or left-handed.

Distribution

The native range of this pond snail is from Europe to central Asia.

• Not listed in IUCN red list – not evaluated (NE)^[2]
• Czech Republic – least concern (LC)^[3]
• Germany
• Netherlands^[4]
• Russia – Sverdlovsk oblast^[5]
• Slovakia
• Poland
• British Isles: Great Britain, Ireland
• Slovenia

Description

All species within family Planorbidae have sinistral shells.

Planorbarius corneus. View of the sunken spire (held downwards in life)

Planorbarius corneus. View of umbilicus (held uppermost in life)

Habitat

This large planorbid is found in water which is still, or only moving slowly, where there is a good growth of many different kinds of pond weeds, and where there are high levels of calcium dissolved in the water.^[6]

Planorbarius corneus under high temperatures has been studied by Kartavykh & Podkovkin (2002).^[7]

Parasites

This species of snail functions as a host for several parasite species:

• as first intermediate host for Prosthogonimus ovatus^[8]
• as first intermediate host for Apatemon gracilis^[9]
• as first and as second intermediate host for Hypoderaeum conoideum^[10]
• as intermediate host for Syngamus trachea^[11]
• as intermediate host for Typhlocoelum sisowi^[12]

References

1. ^ Linnaeus C. (1758). Systema Naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. 10th edition. - Vermes. Testacea: 700-781. Holmiae. (Salvius).
2. ^ 2006 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Cited 5 March 2007.
3. ^ Juřičková L., Horsák M. & Beran L. (2001) "Check-list of the molluscs (Mollusca) of the Czech Republic". Acta Soc. Zool. Bohem. 65: 25-40.
4. ^ http://www.anemoon.org/anm/voorlopige-kaarten/zoetwatermollusken/wetenschappelijk/planorbarius-corneus/
5. ^ http://ecoinf.uran.ru/content/4catalog/70.shtml
6. ^ Janus, Horst, 1965. ‘’The young specialist looks at land and freshwater molluscs’’, Burke, London
7. ^ (Russian) Kartavykh T. N. & Podkovkin V. G. (2002) "[Influence of high temperature of environment upon cholinesterase activity in Gastropoda Planorbis corneus]". 152-157. PDF.
8. ^ Prosthogonimus ovatus (Parasite Species Summary)
9. ^ Apatemon gracilis (Parasite Species Summary)
10. ^ Hypoderaeum conoideum (Parasite Species Summary)
11. ^ Syngamus trachea (Parasite Species Summary)
12. ^ Typhlocoelum sisowi (Parasite Species Summary)

External links

• Planorbarius corneus at National Center for Biotechnology Information (NCBI) website.
• Pesticides Database - Chemical Toxicity Studies