haustrum

Species within the genus Haustrum include:

Pomacea haustrum is a large species that has a large globular shell with a channeled suture.

Haustrum haustorium used to be the only species in the genus Haustrum.

The indigenous distribution of Pomacea haustrum is Bolivia, Brazil and Peru in South America.

The haustra (singular haustrum) of the colon are the small pouches caused by sacculation, which give the colon its segmented appearance.

Pomacea haustrum were discovered in the late 1970s in Palm Beach County Florida, and have not spread appreciably in 30 years.

Since other Pomacea species also produce green eggs, this character is insufficient to verify this species as Pomacea haustrum.

Ghesquiere S. Pomacea (Pomacea) haustrum.

One haustrum distends as it fills, which stimulates muscles to contract, pushing the contents to the next haustrum.

Haustrum lacunosum is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails.

Pomacea haustrum, common name the titan applesnail, is a species of large freshwater snail with an operculum, an aquatic gastropod mollusk in the family Ampullariidae, the applesnails.

Pomacea haustrum is currently of relatively minor concern in the U.S., given its failure to spread beyond Palm Beach County after 30 years or more in Florida.

However, Beu (2004) reclassified a number of New Zealand's whelks, considering species in the genus Lepsiella to be synonymous with the genus Haustrum.

The egg masses have an irregular honeycombed appearance, like those of Pomacea haustrum, but are smaller and have a tan to salmon color, although the egg masses are white when freshly laid.

Pomacea haustrum was originally described under the name Ampullaria haustrum by Lovell Augustus Reeve in his book Conchologia Iconica, in 1856.

Populations of Pomacea haustrum in Florida produce bright green egg masses consisting of individual eggs approximately 3-5 mm in size compressed into polygonal shapes, giving the egg mass an irregular honeycombed appearance.