Faunus ater

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Faunus ater
Faunus ater 01.JPG
A shell of Faunus ater
Scientific classification

F. ater
Binomial name
Faunus ater
(Linnaeus, 1758)
Faunus ater (Linnaeus, 1758). Museum specimens.

Faunus ater is a species of brackish water snail with an operculum, an aquatic gastropod mollusk in the family Pachychilidae.[1]

Faunus ater is the only species within the genus Faunus.[1]


The distribution of Faunus ater includes:


The periostracum is thick, and the color of the periostracum is dark brown or black.[1] The shell has about 20 whorls.[1] The apical whorls may be eroded in older snails.[1] The aperture is ovate and white.[1] The shell is unique among Cerithioidea, because it has two deep sinuses: an anal sinus which is close to the suture and an anterior sinus more forward in the aperture.[1] The height of the aperture is about one-fifth of the height of the shell.[1]

The height of the shell is usually 50–60 mm, but can be up to 90 mm.[1]

The operculum is oval, corneous and dark brown in color.[1]

The snail has a broad snout.[1] The radula is large and is located in a correspondingly large buccal mass.[1]


This snail lives in slightly brackish water.[1] It has also been reported from freshwater.[1] It is the only pachychilid species that lives in brackish water; the other species in the family are freshwater snails.

The population density can reach up to 6700 snails per m2.[1]

This snail probably feeds by grazing.[1]

It is oviparous.[1] It probably has free-swimming larvae.[1]

Human use[edit]

This snail is used as a food source for humans in the Philippines and in Thailand.[1]


  1. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae Lok A. F. S. L., Ang W. F., Ng P. X., Ng B. Y. Q. & Tan S. K. (2011). "Status and distribution of Faunus ater (Linnaeus, 1758) (Mollusca: Cerithioidea) in Singapore". Nature in Singapore 4: 115-121. PDF.
  2. ^ Solem A. (1953). "Marine and fresh-water mollusks of the Solomon Islands". Fieldiana Zoology 34(22): 213-227. page 220.

Further reading[edit]

External links[edit]

Media related to Faunus ater at Wikimedia Commons