Sternotherus is a genus of turtles in the family Kinosternidae including six species commonly known as musk turtles. The genus is endemic to North America, occurring in the eastern third of the US and southeast Ontario, Canada. Musk glands positioned near the bridge of the shell can produce foul smelling secretions when the turtles are threatened, although gentle handling does not normally provoke a response. Sternotherus are moderately small turtles, with the largest species in the genus, the razor-backed musk turtle, attaining a maximum of 17.6 cm. in shell length. The carapace is characteristically oval and domed, with most species having one or three keels on the back which may become smoother and obscure with age in some species. Musk turtles are generally drab in color, mostly black, gray, brown, olive, or ocher, which aid in camouflaging them in their natural habitats. The head is relatively large and stout, marked with spots, streaks, or strips. The plastron has only 10 or 11 scutes, as opposed to 12, a more common condition in North American turtles. The tail is short, with males having a horny claw like tip.
Succinea, common name the amber snails, is a large genus of small, air-breathing land snails, terrestrial pulmonate gastropod molluscs in the family Succineidae.
Anguispira, the tigersnails, is a genus of small pulmonate land snails in the family Discidae endemic to North America. Snails in this genus are defined by their striped shells. Anguispira species are either habitat generalists like A. alternata or limestone specialists like A. cumberlandiana.
Elimia is a genus of freshwater snails with an operculum, aquatic gastropod mollusks in the family Pleuroceridae. Various species are found in creeks throughout much of the eastern and central United States and the Great Lakes region of Canada. Fossils have been found across the whole of the North American continent, including from the Paleocene of Mexico and the Eocene of California. They were formerly included in the genus Goniobasis, together with the western Juga species.
Elliptio is a genus of medium- to large-sized freshwater mussels, aquatic bivalve mollusks in the family Unionidae, commonly known as the unionids, freshwater mussels or naiads.
The excised slitshell, scientific name †Gyrotoma excisa, was a species of freshwater snail, an aquatic gastropod mollusk in the family Pleuroceridae. This species was endemic to the United States. It is now extinct.
The striate slitshell, scientific name Gyrotoma lewisii, was a species of freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Pleuroceridae. This species was endemic to the United States. It is now extinct.
The pagoda slitshell, scientific name †Gyrotoma pagoda, was a species of freshwater snail, a gastropod in the family Pleuroceridae. This species was endemic to the United States. It is now extinct.
The flat pebblesnail is a species of freshwater snail, an aquatic gastropod mollusk in the family Lithoglyphidae.
Pleurocera is a genus of freshwater snails with an operculum, aquatic gastropod molluscs in the family Pleuroceridae.
Pleuroceridae, common name pleurocerids, is a family of small to medium-sized freshwater snails, aquatic gilled gastropod mollusks in the superfamily Cerithioidea.These snails have an operculum and typically a robust high-spired shell.
Euglandina is a genus of predatory medium- to large-sized, air-breathing, land snails, terrestrial pulmonate gastropod mollusks in the family Spiraxidae.
Galba is a genus of small air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Lymnaeidae, the pond snails.
Pachychilidae, common name pachychilids, is a taxonomic family of freshwater snails, gastropod molluscs in the clade Sorbeoconcha.
Thiara is a genus of freshwater snails, aquatic gastropod mollusks in the subfamily Thiarinae of the family Thiaridae.
Stenomelania is a genus of freshwater snails with a gill and an operculum, aquatic gastropod mollusks in the subfamily Thiarinae of the family Thiaridae known as thiarids.
Jagora is a genus of freshwater snails which have an operculum, aquatic gastropod mollusks in the family Pachychilidae.
Stenomelania juncea is a species of freshwater snail, an aquatic gastropod mollusk in the family Thiaridae.
