Knefastia polygona

Knefastia polygona is an extinct species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae, the turrids and allies.^[1]

Knefastia polygona
Shell of Knefastia polygona (Specimen at MNHN, Paris)
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Neogastropoda
Superfamily:	Conoidea
Family:	Pseudomelatomidae
Genus:	Knefastia
Species:	K. polygona
Binomial name
Knefastia polygona (G.P. Deshayes, 1834 )
Synonyms
† Surcula polygona (Deshayes, 1834) † Turricula (Knefastia) polygona Deshayes, 1834

Description

The length of the shell attains 20 mm.

Distribution

This extinct marine species was found in Eocene strata in the Paris Basin, France.