Archinacellidae

†Archinacellidae is an extinct family of paleozoic molluscs of uncertain position (Gastropoda or Monoplacophora).

Description
These are cap-shaped fossil shells.

Taxonomy
The taxonomy of the Gastropoda by Bouchet & Rocroi, 2005 categorizes Archinacellidae in the superfamilia Archinacelloidea within the Paleozoic molluscs of uncertain systematic position. This family has no subfamilies.

Genera
Genera in the family Archinacellidae include:
 * Archinacella Ulrich & Scofield, 1897 – type genus of the family Archinacellidae
 * Archinacella powersi Ulrich & Scofield, 1897 – type species
 * Archinacella instabilis (Billings, 1865)
 * Barrandicella Peel & Horný, 1999
 * Barrandicellopsis Horný, 2000
 * Barrandicellopsis ovata – synonym: Archinacella ovata Barrande in Perner, 1903 – Archinacella ovata var. elevata Barrande in Perner, 1903 – type species, Middle Ordovician from Bohemia
 * Barrandicellopsis extenuata – synonym: Orthonychia extenuata Barrande in Perner, 1903 – probably belongs to genus Barrandicellopsis, Middle Ordovician from Bohemia