Cycloneritida (nerites and false-limpets) is an order of
land snails, freshwater snails, and sea snails.
[MolluscaBase eds. (2020). MolluscaBase. Cycloneritida. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=1054475 on 2020-08-21]
These are
gastropod molluscs within the subclass
Neritimorpha
Neritimorpha is a taxonomic grouping, an unranked major clade of snails, gastropod mollusks. This grouping includes land snails, sea snails, slugs, some deepwater limpets, and also freshwater snails. Neritimorpha contains around 2,000 extant s ...
. 14 of the families in the order are extant, and eight of the families are extinct.
It was previously categorized as the
clade Cycloneritimorpha.
According to the
Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005)
The taxonomy of the Gastropoda as it was revised in 2005 by Philippe Bouchet and Jean-Pierre Rocroi is a system for the scientific classification of gastropod mollusks. (Gastropods are a taxonomic class of animals which consists of snails and s ...
, as well as the Cycloneritida, the subclass Neritimorpha also contains the (entirely fossil) clade
Cyrtoneritimorpha, plus a number of other fossil families that are currently unassigned.
The earliest evolutionary forms of Cycloneritimorpha show double visceral organs, double gills, and normally a double-chambered heart.
Taxonomy
The taxonomy of Cycloneritida is based on work by Kano et al. (2002) that recognizes 4 clades. These clades are established on genetic analysis (
28S rRNA
Crazy Eights is a shedding-type card game for two to seven players and the best known American member of the Eights Group which also includes Pig and Spoons. The object of the game is to be the first player to discard all of their cards. The ga ...
) of recent species only. These clades proposed by Kano are ranked as superfamilies in the
taxonomy of the Gastropoda (Bouchet & Rocroi, 2005)
The taxonomy of the Gastropoda as it was revised in 2005 by Philippe Bouchet and Jean-Pierre Rocroi is a system for the scientific classification of gastropod mollusks. (Gastropods are a taxonomic class of animals which consists of snails and s ...
.
The spelling of Cycloneritimorpha has been amended to the order Cycloneritida in the new taxonomy of the Gastropoda by Bouchet and Rocroi in 2017
[Philippe Bouchet & Jean-Pierre Rocroi, Revised Classification, Nomenclator and Typification of Gastropod and Monoplacophoran Families; Malacologia, 2017, 61(1–2): 1–526 ]
Clade Cycloneritimorpha contains:
*Superfamily
Helicinoidea
**Family
Helicinidae
Helicinidae is a family of small tropical land snails which have an operculum. They are terrestrial operculate gastropod mollusks in the superfamily Helicinoidea.
These snails are not at all closely related to the air-breathing land snails, d ...
** † Family
Dawsonellidae
** † Family
Deaniridae
**Family
Neritiliidae
**Family
Proserpinellidae
**Family
Proserpinidae
Proserpinidae is a Taxonomy (biology), taxonomic family (biology), family of small land snails with an operculum (gastropod), operculum, gastropod mollusks in the superfamily Helicinoidea (according to the Taxonomy of the Gastropoda (Bouchet & Ro ...
*Superfamily
Hydrocenoidea
Hydrocenidae is a taxonomic family of minute land snails or cave snails with an operculum, terrestrial gastropod mollusks or micromollusks in the clade Cycloneritimorpha.
Hydrocenidae are widespread across the Palearctis and Africa, but r ...
**Family
Hydrocenidae
Hydrocenidae is a taxonomic family of minute land snails or cave snails with an operculum, terrestrial gastropod mollusks or micromollusks in the clade Cycloneritimorpha.
Hydrocenidae are widespread across the Palearctis and Africa, but r ...
* † Superfamily
Naticopsoidea Waagen, 1880
*Superfamily
Neritoidea
**Family
Neritidae
Neritidae, common name the nerites, is a taxonomic family of small to medium-sized saltwater and freshwater snails which have a gill and a distinctive operculum.
MolluscaBase eds. (2021). MolluscaBase. Neritininae Poey, 1852. Accessed through: ...
**Family
Phenacolepadidae
** † Family
Pileolidae
*Superfamily
Neritopsoidea
**Family
Neritopsidae
Neritopsidae is a family (biology), family of small sea snails and freshwater snails in the clade Cycloneritimorpha (according to the Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005), taxonomy of the Gastropoda by Bouchet & Rocroi, 2005).
The ...
** † Family
Cortinellidae
** † Family
Delphinulopsidae
** † Family
Plagiothyridae
** † Family
Pseudorthonychiidae
**Family
Titiscaniidae
* † Superfamily
Symmetrocapuloidea
** † Family
Symmetrocapulidae
References
{{Taxonbar, from1=Q88577371, from2=Q2443153
Gastropod taxonomy