Tylomelania perfecta

Tylomelania perfecta is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Pachychilidae. Tylomelania perfecta, like other members of its genus, is ovoviviparous, meaning it retains fertilized eggs in a brood pouch inside the female’s pallial oviduct until they hatch into fully formed juveniles. This unique reproductive strategy is uncommon among freshwater snails and involves significant maternal investment (von Rintelen & Glaubrecht, 2005). This is the first species of the genus Tylomelania that was described (under the name Melania perfecta) by malacologist Albert Mousson in 1849.

Tylomelania perfecta
Photo of an apertural view of a shell of Tylomelania perfecta.
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Family:	Pachychilidae
Genus:	Tylomelania
Species:	T. perfecta
Binomial name
Tylomelania perfecta (Mousson, 1849)[1]
Synonyms
Melania perfecta Mousson, 1849

Distribution

This species occurs in south, south-east and central Sulawesi, Indonesia.^[2] It is a widespread species of Tylomelania.^[2]

Drawing of an apertural view of a shell of Tylomelania perfecta.

Drawing of an abapertural view of a shell of Tylomelania perfecta.

Ecology

This is a riverine species.^[2]