Nacellidae

Nacellidae is a taxonomic family of sea snails or true limpets, marine gastropod molluscs in the subclass Patellogastropoda.

Taxonomy
Nacellidae was the only family in the superfamily Nacelloidea as described by Bouchet & Rocroi (2005),. However a molecular phylogenetic study of Patellogastropoda by Nakano & Ozawa (2007) found that Nacellidae was recovered within Lottioidea, as shown in the following cladogram:

As a result Nacellidae was moved to Lottioidea in the taxonomic revision of Bouchet et al (2017). More recently, a recent phylogenomic study found Nacellidae as a sister to Patellidae, which suggests that Nacellidae should be transferred to Patelloidea.

Genera
Genera within the family Nacellidae include:
 * Cellana H. Adams, 1869
 * Naccula Iredale, 1924
 * Nacella Schumacher, 1817 - type genus
 * Macclintockia Gould, 1846 : taxon inquirendum
 * - one species Macclintockia scabra (Gould, 1846) : synonym of Lottia scabra (Gould, 1846)