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Jagora asperata
''Jagora asperata'' is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Pachychilidae. ''Jagora asperata'' is the type species of the genus ''Jagora''.〔Köhler F. & Glaubrecht M. (2003). "Morphology, reproductive biology and molecular genetics of ovoviviparous freshwater gastropods (Cerithioidea: Pachychilidae) from the Philippines, with description of the new genus ''Jagora''". ''Zoologica Scripta'' 32(1): 35-59. .〕
==Description==
The shell of an adult ''Jagora asperata'' can be as long as and has a width of about . This shell is solid, dark brown to yellowish brown, highly tower–shaped, comprising up to twelve whorls. The apical whorl is truncated. The sculpture of the shell shows closely spaced axial ribs and spiral elements with tiny nodules.
The body of these snails is gray to black with filiform antennae. They are characterized by a unique reproductive system, including a long sperm gutter, a very short a spermatophore bursa and a prominent lateral ridge working as a seminal receptacle. Females carry eggs and juvenile stages within their mantle cavity. These snails feed on detritus and algae.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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