- Aquatic Biomes
- lakes and ponds
- rivers and streams
- Sexual Dimorphism
- female larger
- Range length
- 2 to 4 cm
- 0.79 to 1.57 in
There is little information on the mating habits of (Brown, et al., 1989). This species has both sexual and parthenogenic populations. Mating usually takes place in the warmer months of the year. In a Louisiana population, sex ratios were skewed toward females.
- Key Reproductive Features
- seasonal breeding
- gonochoric/gonochoristic/dioecious (sexes separate)
- Breeding interval
- Campeloma descisum mates once a year.
- Breeding season
- Campeloma descisum mates in the warmer months of the year.
- Parental Investment
The lifespan of C. descisum differs with latitude. Temperate populations generally live 3 to 5 years, although some may live up to 12 years. Subtropical populations live only one to two years. (Brown, et al., 1989; Burch and Jung, 1992; Dillon, et al., 2006)
- Typical lifespan
- 1 to 12 years
- Typical lifespan
Campeloma descisum is usually found around decaying organic matter, and burrows in the substrate. Individuals aggregate and may move up to 10 m upstream. These aggregations can be very large; average densities in Louisiana populations were measured at 300 per square meter, peaking in the summer to 600 to 800 snails per square meter. (Bovbjerg, 1952; Brown, et al., 1989; Burch and Jung, 1992)
Communication and Perception
- Primary Diet
- Other Foods
- Foraging Behavior
Pointed campeloma snails are eaten by fish, diving ducks, turtles and crayfish. Burrowing in the soil and dirt at the bottom of rivers and lakes may be a good way for these snails to avoid being eaten by predators. (Johnson, 2003; van Appledorn, et al., 2007)
Freshwater snails in general are an important link in aquatic ecosystems, cycling nutrients by feeding on algae and other detritus in the water. Sanguinicola occidentalis, which infects yellow perch. These snails are also the intermediate hosts for the trematode, Leucochloridiomorpha constantiae, which infects water fowl. This trematode is found in the female reproductive system in parthenogenic populations. (Johnson, 1992a; Johnson, 2003; Muzzall, 2000)is a significant food source for fish, diving ducks, turtles and crayfish. Freshwater snails are often intermediate hosts for trematodes. is a known host for the fluke
- fluke, Sanguinicola occidentalis
- trematode, Leucochloridiomorpha constantiae
Economic Importance for Humans: Positive
There are no know positive effects ofon humans.
Economic Importance for Humans: Negative
There are no known adverse effects ofon humans.
Dreissena polymorpha, settles on this snail, impeding movement and possibly growth. This may impact future populations of , and could require more research and possible conservation efforts. (van Appledorn, et al., 2007; van Appledorn, et al., 2007)currently has no special conservation status. However, the invasive zebra mussel,
Renee Mulcrone (author), Special Projects, Angela Miner (editor), Animal Diversity Web Staff.
living in the Nearctic biogeographic province, the northern part of the New World. This includes Greenland, the Canadian Arctic islands, and all of the North American as far south as the highlands of central Mexico.
- bilateral symmetry
having body symmetry such that the animal can be divided in one plane into two mirror-image halves. Animals with bilateral symmetry have dorsal and ventral sides, as well as anterior and posterior ends. Synapomorphy of the Bilateria.
uses smells or other chemicals to communicate
an animal that mainly eats decomposed plants and/or animals
particles of organic material from dead and decomposing organisms. Detritus is the result of the activity of decomposers (organisms that decompose organic material).
animals which must use heat acquired from the environment and behavioral adaptations to regulate body temperature
a method of feeding where small food particles are filtered from the surrounding water by various mechanisms. Used mainly by aquatic invertebrates, especially plankton, but also by baleen whales.
mainly lives in water that is not salty.
having a body temperature that fluctuates with that of the immediate environment; having no mechanism or a poorly developed mechanism for regulating internal body temperature.
offspring are produced in more than one group (litters, clutches, etc.) and across multiple seasons (or other periods hospitable to reproduction). Iteroparous animals must, by definition, survive over multiple seasons (or periodic condition changes).
having the capacity to move from one place to another.
- native range
the area in which the animal is naturally found, the region in which it is endemic.
development takes place in an unfertilized egg
- seasonal breeding
breeding is confined to a particular season
remains in the same area
offspring are all produced in a single group (litter, clutch, etc.), after which the parent usually dies. Semelparous organisms often only live through a single season/year (or other periodic change in conditions) but may live for many seasons. In both cases reproduction occurs as a single investment of energy in offspring, with no future chance for investment in reproduction.
reproduction that includes combining the genetic contribution of two individuals, a male and a female
associates with others of its species; forms social groups.
uses touch to communicate
that region of the Earth between 23.5 degrees North and 60 degrees North (between the Tropic of Cancer and the Arctic Circle) and between 23.5 degrees South and 60 degrees South (between the Tropic of Capricorn and the Antarctic Circle).
movements of a hard surface that are produced by animals as signals to others
uses sight to communicate
Bovbjerg, R. 1952. Ecological aspects of dispersal of the snail Ecology, 33/2: 169-176..
Brown, K., D. Varza, T. Richardson. 1989. Life histories and population dynamics of two subtropical snails (Prosobranchia: Viviparidae). J. N. Am. Benthol. Soc., 8: 222-228.
Burch, J. 1989. Freshwater snails of North America. Hamburg, Michigan: Malacological Publications.
Burch, J., Y. Jung. 1992. Freshwater Snails of the University of Michigan Biological Station Area. Walkerana, 6/15: 1-218.
Dillon, R., B. Watson, T. Stewart, W. Reeves. 2006. "http://www.fwgna.org/species/viviparidae/c_decisum.html.(Say 1817)" (On-line). The freshwater gastropods of North America. Accessed May 29, 2013 at
Great Lakes Environmental Research Laboratory, 2008. "Viviparidae" (On-line). Great Lakes water life photo gallery. Accessed May 30, 2013 at http://www.glerl.noaa.gov/seagrant/GLWL/Benthos/Mollusca/Gastropods/Viviparidae.html.
Johnson, P. 2003. Sustaining America's aquatic biodiversity - Freshwater snail biodiversity and conservation. Virginia Cooperative Extension, Publication no. 420-530: 1-7. Accessed October 11, 2013 at http://pubs.ext.vt.edu/420/420-530/420-530.html.
Johnson, S. 1992. Spontaneous and hybrid origins of parthenogenesis of Heredity, 58: 253-261.(freshwater prosobranch snail).
Johnson, S. 1992. Parasite-Induced Parthenogenesis in a Freshwater Snail: Stable, Persistent Patterns of Parasitism. Oecologia, 89/4: 533-541.
Karowe, D., T. Pearce, W. Spaller. 1993. Chemical communication in freshwater snails: Behavioral responses of Physella parkeri to mucous trails of P. parkeri (Gastropoda: Pulmonata) and (Gastropoda: Prosobranchia). Malacological Review, 26: 9-14.
Laman, T., N. Boss, H. Blankespoor. 1984. Depth distribution of seven species of gastropods in Douglas Lake, Michigan. Nautilus, 98: 20-24.
Muzzall, P. 2000. Occurrence of Sanguinicola occidentalis Van Cleave and Mueller, 1932 in Perca flavescens and from a Michigan Creek. Journal of Parasitology, 86/6: 1360-1362.
van Appledorn, M., D. Lamb, K. Albalak, C. Bach. 2007. Zebra mussels decrease burrowing ability and growth of a native snail, Hydrobiologia, 575: 441-445..