Philinoidea

Philinoidea is a taxonomic superfamily of sea slugs, specifically headshield slugs, marine gastropod mollusks in the order Cephalaspidea.

Anatomy
The species in the Superfamily Philinoidea are generally small animals that have and internal or external shell, and a covered gill. Unlike some related forms, the visceral mass is not sharply set off from the rest of the body.

Taxonomy
According to the latest taxonomy, the following families are recognised in the Superfamily Philinoidea:
 * Aglajidae Pilsbry, 1895 (1847)
 * Alacuppidae Oskars, Bouchet & Malaquias, 2015
 * Antarctophilinidae Moles, Avila & Malaquias, 2019
 * Colpodaspididae Oskars, Bouchet & Malaquias, 2015
 * Gastropteridae Swainson, 1840
 * Laonidae Pruvot-Fol, 1954
 * Philinidae Gray, 1850 (1815)
 * Philinoglossidae Hertling, 1932
 * Philinorbidae Oskars, Bouchet & Malaquias, 2015
 * Philinorbis Habe, 1950
 * Pseudophiline Habe, 1976
 * Scaphandridae G.O. Sars, 1878