Planorbella trivolvis

Planorbella trivolvis
	Two specimen of Planorbella trivolvis in their natural environment, on aquatic vegetation
Conservation status
	NE[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Heterobranchia; clade Euthyneura; clade Panpulmonata; clade Hygrophila
Superfamily:	Planorboidea
Family:	Planorbidae
Subfamily:	Bulininae
Genus:	Planorbella
Species:	P. trivolvis
Binomial name
	Planorbella trivolvis; (Say, 1817)
Synonyms
	Helisoma trivolvis (Say, 1817); Planorbis trivolvis Say, 1817 (original combination); Helisoma trivolvis

Planorbella trivolvis is a species of freshwater air-breathing 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.

Description

All species within family Planorbidae have sinistral shells. The width of the shell of this species is up to 18 mm.

Distribution

This pond snail is native to North America, from the Arctic areas of Canada all the way south to Florida. It has also been introduced in other parts of the world.

Habitat

This species prefers habitats with floating water weeds.

Parasites

Planorbella trivolvis is an intermediate host for Echinostoma trivolvis.[4]

References

2006 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Cited 5 March 2007.
Paraense W. L. (September 2003) "Planorbidae, Lymnaeidae and Physidae of Peru (Mollusca: Basommatophora)". Memórias do Instituto Oswaldo Cruz 98(6): 767-771. PDF
Reeves W. K., Dillon Jr. R. T. & Dasch G. A. (2008). "Freshwater snails (Mollusca: Gastropoda) from the Commonwealth of Dominica with a discussion of their roles in the transmission of parasites". American Malacological Bulletin 24: 59-63. doi:10.4003/0740-2783-24.1.59. PDF Archived 2010-01-07 at the Wayback Machine.
"Maintenance of the life cycle of Echinostoma trivolvis (Trematoda) in dexamethasone-treated ICR mice and laboratory-raised Helisoma trivolvis (Gastropoda)". doi:10.1007/s004360050200.

CYNTHIA G. NORTON & JENNIFER M. BRONSON (2006) "THE RELATIONSHIP OF BODY SIZE AND GROWTH TO EGG PRODUCTION IN THE HERMAPHRODITIC FRESHWATER SNAIL, HELISOMA TRIVOLVIS". Journal of Molluscan Studies 72(2): 143-147. doi:10.1093/mollus/eyi057
Norton C. G., Johnson A. F. & Mueller R. L. (2008) "Relative size influences gender role in the freshwater hermaphroditic snail, Helisoma trivolvis". Behavioral Ecology 19(6): 1122-1127. doi:10.1093/beheco/arn099
Johnson, P. D.; Bogan, A. E.; Brown, K. M.; Burkhead, N. M.; Cordeiro, J. R.; Garner, J. T.; Hartfield, P. D.; Lepitzki, D. A. W.; Mackie, G. L.; ; Tarpley, T. A.; Tiemann, J. S.; Whelan, N. V.; Strong, E. E. (2013). Conservation status of freshwater gastropods. of Canada and the United States. Fisheries. 38(6): 247-282

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[1] 2006 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Cited 5 March 2007.

[Paraense2003-2] Paraense W. L. (September 2003) "Planorbidae, Lymnaeidae and Physidae of Peru (Mollusca: Basommatophora)". Memórias do Instituto Oswaldo Cruz 98(6): 767-771. PDF

[Reeves_2008-3] Reeves W. K., Dillon Jr. R. T. & Dasch G. A. (2008). "Freshwater snails (Mollusca: Gastropoda) from the Commonwealth of Dominica with a discussion of their roles in the transmission of parasites". American Malacological Bulletin 24: 59-63. doi:10.4003/0740-2783-24.1.59. PDF Archived 2010-01-07 at the Wayback Machine.

[4] "Maintenance of the life cycle of Echinostoma trivolvis (Trematoda) in dexamethasone-treated ICR mice and laboratory-raised Helisoma trivolvis (Gastropoda)". doi:10.1007/s004360050200.