Khairkhaniidae
Khairkhaniidae is an extinct family of Paleozoic fossil molluscs of uncertain position. They are thought to belong to either the Gastropoda or Monoplacophora. They possess planispiral coiled shells with a columnar microstructure. 2005 taxonomy The taxonomy of the Gastropoda by Bouchet & Rocroi, 2005 categorizes Khairkhaniidae within the Paleozoic molluscs of uncertain systematic position. This family is unassigned to superfamily. This family has no subfamilies. 2006–2007 taxonomy According to the P. Yu. Parkhaev, the Khairkhaniidae is the only family in the order Khairkhaniifomes within the subclass Divasibranchia. Class Helcionelloida Subclass Divasibranchia Minichev & Starobogatov, 1975 Order Khairkhaniifomes Parkhaev, 2001 Family Khairkhaniidae Missarzhevsky, 1989 Genera Genera in the family Khairkhaniidae include: Khairkhania Missarzhevsky, 1981 - type genus of the family Khairkhaniidae Khairkhania rotata Missarzhevsky, 1981 Barskovia References Helcionelloida