Cystiscinae

Cystiscinae
	Drawing of a typical animal in this subfamily
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Clade:	Caenogastropoda
Clade:	Hypsogastropoda
Clade:	Neogastropoda
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:[1]

Crithe Gould, 1860
Cystiscus Stimpson, 1865:55
Extra Jousseaume, 1894 - with the only species Extra extra Jousseaume, 1894[2]
Gibberula Swainson, 1840
Inbiocystiscus Ortea and Espinosa, 2001[3]
Intelcystiscus Ortea and Espinosa, 2001[3]
†Marginocystiscus Landau, C. M. Silva & Heitz, 2016[4]
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

Cystiscus
Crithe
Extra

gollark: !pingwhen online <@!258639553357676545> Rust.

References

MolluscaBase (2018). "Cystiscinae Stimpson, 1865". WoRMS. World Register of Marine Species. Retrieved 4 January 2019.
Jousseaume, F.P. (1894). "Diagnoses des coquilles de nouveaux mollusques". Bulletin de la Société Philomathique de Paris. 8 (6): 98–105. Retrieved 4 July 2020.
Ortea, J.; Espinosa, J. (2001). "Intelcystiscus e Inbiocystiscus (Mollusca: Neogastrópoda: Cystiscidae) dos nuevos géneros del Atlántico occidental tropical". Avicennia. 14: 107–114.
Landau, Bernard Manue; Marques da Silva, Carlos; Heitz, Antoine (2016). "Systematics of the lower-middle Miocene Cantaure Formation, Paraguaná Peninsula, Venezuela". Bulletins of American Paleontology. 389-391: 1–581.

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.

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[worms-1] MolluscaBase (2018). "Cystiscinae Stimpson, 1865". WoRMS. World Register of Marine Species. Retrieved 4 January 2019.

[Jousseaume1894-2] Jousseaume, F.P. (1894). "Diagnoses des coquilles de nouveaux mollusques". Bulletin de la Société Philomathique de Paris. 8 (6): 98–105. Retrieved 4 July 2020.

[OrteaEspinosa2001-3] Ortea, J.; Espinosa, J. (2001). "Intelcystiscus e Inbiocystiscus (Mollusca: Neogastrópoda: Cystiscidae) dos nuevos géneros del Atlántico occidental tropical". Avicennia. 14: 107–114.

[LandauMarquesdaSilvaHeitz2016-4] Landau, Bernard Manue; Marques da Silva, Carlos; Heitz, Antoine (2016). "Systematics of the lower-middle Miocene Cantaure Formation, Paraguaná Peninsula, Venezuela". Bulletins of American Paleontology. 389-391: 1–581.