Cystiscinae are a taxonomic subfamily of minute sea snails. These are marine gastropod mollusks or micromollusks in the family Cystiscidae, and the clade Neogastropoda.
Diagnosis Shell minute to small, white; spire immersed to low; surface smooth or axially costate; lip thickened, smooth or denticulate; external varix absent; siphonal notch absent; posterior notch absent; columella multiplicate, with combined total of usually 2 to 8 plications plus parietal lirae; internal whorls cystiscid type. Animal mantle smooth, at least partially extending over external shell surface. Internal anatomy unknown.
Genera Genera within the subfamily Cystiscinae are as follows: Crithe Gould, 1860 Cystiscus Stimpson, 1865:55 Extra Jousseaume, 1894 - with the only species Extra extra Jousseaume, 1894 Gibberula Swainson, 1840 Inbiocystiscus Ortea and Espinosa, 2001 Intelcystiscus Ortea and Espinosa, 2001 †Marginocystiscus Landau, C. M. Silva & Heitz, 2016 Pachybathron Gaskoin, 1853 Persicula Schumacher, 1817 Ticocystiscus Espinosa and Ortea, 2002 Ticofurcilla Espinosa & Ortea, 2002 †Topaginella Laseron, 1957:288
Comparative shell structure of three genera
References
2002. Nuevas especies de margineliformes de Cuba, Bahamas y el Mar Caribe de Costa Rica Avicennia 15:101-128. 2001. Intelcystiscus e Inbiocystiscus (Mollusca: Neogastrópoda: Cystiscidae) dos nuevos géneros del Atlántico occidental tropical. Avicennia 14 107-114.