| Hebetancylus excentricus | |
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| Species: | H. excentricus |
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| Hebetancylus excentricus (Morelet, 1851) | |
Hebetancylus excentricus, the excentric ancylid, is a species of small, freshwater, air-breathing limpet, an aquatic pulmonate gastropod mollusc or micromollusc in the family Planorbidae, the ram's horn snails and their allies. [2] [3]
H. excentricus is widely distributed across North and Central America and the Caribbean. [1] The main area of its North American range extends from Florida to Texas, but it has also been reported from scattered ponds and river backwaters along the length of the southern Atlantic Coastal Plain as far north as North Carolina. This pattern of contagious distribution suggests that the species is possibly being dispersed through the air by migratory waterfowl. [4] [5]
H. excentricus usually occurs on rocks in fast-flowing streams and occasionally on rocks and rooted aquatic vegetation in lakes and the impounded backwaters of rivers and streams. [6] It also occurs on submerged sticks, logs, and large items of organic debris. [4]
Annual, bi- and trivoltine life cycles have been reported in Louisiana [4] and Texas [6] populations of H. excentricus; however, this increased number of generations occurs without an increase in population growth rates. [6]
Morelet's crocodile(Crocodylus moreletii), also known as the Mexican crocodile or Belize crocodile, is a modest-sized crocodilian found only in fresh waters of the Atlantic regions of Mexico, Belize and Guatemala. It usually grows to about 3 metres (10 ft) in length. It is a Least Concern species. The species has a fossil record in Guatemala.
Physella is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae.
Ancylini is a tribe of small, freshwater, air-breathing limpets, aquatic pulmonate gastropod mollusks in the family Planorbidae, the ram's horn snails and their allies. This tribe used to be treated as a family; the current taxonomic placement within Planorbidae is according to the taxonomy of the Gastropoda.
The river limpet is a species of very small, freshwater, air-breathing limpet, an aquatic pulmonate gastropod mollusk in the tribe Ancylini within the family Planorbidae, the ram's horn snails and their allies.
Ferrissia californica is a species of small freshwater limpet, an aquatic gastropod mollusk in the family Planorbidae.
Valvata piscinalis, common name the European stream valvata or European valve snail, is a species of minute freshwater snail with gills and an operculum, an aquatic gastropod mollusk in the family Valvatidae, the valve snails. It is also known as Cincinna piscinalis.
Latia climoi is a species of small freshwater snail or limpet, an aquatic gastropod mollusc in the family Latiidae. It is the holotype of its genus.
Elimia virginica, common names the Piedmont elimia or Virginia river snail, is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Pleuroceridae.
Leptoxis carinata, common name the crested mudalia, is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Pleuroceridae.
Freshwater snails are gastropod mollusks which live in fresh water. There are many different families. They are found throughout the world in various habitats, ranging from ephemeral pools to the largest lakes, and from small seeps and springs to major rivers. The great majority of freshwater gastropods have a shell, with very few exceptions. Some groups of snails that live in freshwater respire using gills, whereas other groups need to reach the surface to breathe air. In addition, some are amphibious and have both gills and a lung. Most feed on algae, but many are detritivores and some are filter feeders.
Neritona granosa is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Neritidae, the nerites.
The central stoneroller is a fish in the family Cyprinidae endemic to North America.
The red shiner or red-horse minnow is a North American species of freshwater fish in the family Cyprinidae. They are deep-bodied and laterally compressed, and can grow to about three inches in length. For most of the year, both males and females have silver sides and whitish abdomens. Males in breeding coloration, though, have iridescent pink-purple-blue sides and a red crown and fins.
The creek chubsucker is a freshwater fish of the sucker family (Catostomidae).
The bantam sunfish is a species of freshwater fish in the genus Lepomis common throughout Louisiana, in extreme southeastern Texas, in southern Arkansas, and in a few places in western Kentucky and western Tennessee.
Hebetancylus is a genus of small, freshwater, air-breathing limpets, aquatic pulmonate gastropod molluscs in the family Planorbidae, the ram's horn snails and their allies.
Hebetancylus moricandi is a species of small, freshwater, air-breathing limpet, an aquatic pulmonate gastropod mollusc in the family Planorbidae, the ram's horn snails and their allies.
Laevapex is a genus of small, freshwater, air-breathing limpets, aquatic pulmonate gastropod molluscs in the family Planorbidae, the ram's horn snails and their allies.
Laevapex fuscus, the dusky ancylid, is a species of small, freshwater, air-breathing limpet, an aquatic pulmonate gastropod mollusc or micromollusc in the family Planorbidae, the ram's horn snails and their allies.
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