Cystiscinae

Cystiscinae
Drawing of a typical animal in this subfamily
Scientific classification
Kingdom:	Animalia
Subkingdom:	Eumetazoa
Superphylum:	Protostomia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Caenogastropoda clade Hypsogastropoda clade Neogastropoda
Superfamily:	Muricoidea
Family:	Cystiscidae
Subfamily:	Cystiscinae Stimpson, 1865

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:

• † Topaginella Laseron, 1857
• Cystiscus Stimpson, 1865
• Crithe Gould, 1860
• Extra Jousseaume, 1894
• Intelcystiscus Ortea & Espinosa, 2001
• Inbiocystiscus Ortea & Espinosa, 2001
• Ticocystiscus Espinosa & Ortea, 2002

Comparative shell structure of three genera

• 

  Cystiscus
• 

  Crithe
• 

  Extra

References

• Espinosa, J. and J. Ortea 2002. Nuevas especies de margineliformes de Cuba, Bahamas y el Mar Caribe de Costa Rica Avicennia 15:101-128.
• Ortea, J. y J. Espinosa 2001. Intelcystiscus e Inbiocystiscus (Mollusca: Neogastrópoda: Cystiscidae) dos nuevos géneros del Atlántico occidental tropical. Avicennia 14 107-114.