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Two snails come together overnight and each deposits a sac of sperm in a reproductive opening in the other. Fertilisation is internal and some time later, each snail lays a batch of up to twenty eggs. These are cream coloured and nearly spherical, weigh 2 g (0.07 oz) and measure 18 millimetres (0.71 in) in diameter.
Allogona profunda, commonly known as the broad-banded forestsnail, is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Polygyridae. [2] [3] The broad-banded forestsnail is roughly 15 millimeters in height, and about twice as wide. Its shell is helix-shaped.
Location of Hawaii The non-marine molluscs of Hawaii are part of the molluscan fauna of Hawaii, which in turn is part of the (wildlife of Hawaii). A number of species of non-marine molluscs are found in the wild in Hawaii. In addition there are at least ? gastropod species living as hothouse aliens, only in greenhouses, aquaria, and terraria. There are ??? species of gastropods ?? species of ...
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Polygyridae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea. [2]The Polygyridae make up a significant proportion of the land snail fauna of eastern North America, and are also found in western North America, northern Central America, and are present on some Caribbean islands.
Neohelix albolabris is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Polygyridae. Alternate names for Neohelix albolabris are Helix albolabris and Triodopsis albolabris. It is the first land snail to be named by an American-born naturalist, Thomas Say in 1817.
The anatomy of a common air-breathing land snail: much of this anatomy does not apply to gastropods in other clades or groups. Snails are distinguished by an anatomical process known as torsion , where the visceral mass of the animal rotates 180° to one side during development, such that the anus is situated more or less above the head.
Columella columella is a species of minute air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Truncatellinidae, the vertigo snails and allies. [2] This species is not listed in the IUCN red list and not evaluated (NE) [3] Subspecies Columella columella alticola (Ingersoll, 1875)