Neritimorpha
| Neritimorpha Temporal range:
| |
|---|---|
| File:Neritimorpha composite 02.jpg | |
| Examples of Neritimorpha | |
| Scientific classification Edit this classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Neritimorpha |
| Clades | |
|
See text | |
| Synonyms | |
|
Neritopsina Cox & Knight, 1960 | |
Neritimorpha is a clade of gastropod molluscs that contains around 2,000 extant species of sea snails, limpets, freshwater snails, land snails and slugs.[1] This clade used to be known as the superorder Neritopsina.
Etymology
[edit | edit source]The clade's name, Neritimorpha, is from the Ancient Greek νηρίτης (nērī́tēs 'Nerite') and μορφή (morphḗ 'form').[2]
Description
[edit | edit source]
Despite their relatively low diversity, with only around 2,000 species, neritomorphs have achieved a remarkable diversity of forms, resembling a smaller-scale version of the diversity achieved by Gastropoda as a whole.[3] Terrestrial lifestyles have evolved at least three separate occasions in neritimorphs: the extinct Dawsonellidae and the extant Helicinidae and Hydrocenidae.[4] Neritimorphs also include the shellless, slug-like Titiscania.[3]
In all modern neritomorphs except neritopsids, the inner walls of the protoconch are resorbed.[5]
Unlike most other gastropods, neritomorphs typically have calcified opercula. There is no operculum in the shellless Titiscania, and the Phenacolepadidae have a vestigial, non-calcified operculum that shows no postlarval growth.[6]
Evolutionary history
[edit | edit source]Neritimorpha has an extremely rich geologic history, going back to early Ordovician.[5] This clade has been considered to be a leftover of early gastropod diversification.
Neritimorpha is the sister taxon of the Apogastropoda.[7][8] The clade uniting neritimorphs and apogastropods has been called either Adenogonogastropoda[9] or Angiogastropoda.[7]
All modern members of Neritimorpha are classified in the order Cycloneritimorpha.[5] Neritopsoidea was the first of the four modern neritomorph superfamilies to diverge from the others.[4]
1997 taxonomy
[edit | edit source]According to the taxonomy of the Gastropoda (Ponder & Lindberg, 1997) Neritopsina is a gastropod superorder in the subclass Orthogastropoda. The superfamily Palaeotrochoidea is contained within Neritopsina but its order placement is undetermined.
2005 taxonomy
[edit | edit source]The taxonomy of the Gastropoda by Bouchet & Rocroi, 2005[10] categorizes Neritimorpha as a gastropod mollusk clade. It is one of the 6 highest clades in Gastropoda. It contains the clades Cyrtoneritimorpha, Cycloneritimorpha, as well as Paleozoic Neritimorpha of uncertain position.
Clades (and uncertain position taxa) in Neritimorpha include:
- † Paleozoic Neritimorpha of uncertain position
- † clade Cyrtoneritimorpha
- clade Cycloneritimorpha
Four extant superfamilies are recognised: Helicinoidea, Hydrocenoidea, Neritoidea and Neritopsoidea.
In human society
[edit | edit source]Nerite snails are popular in the aquarium trade.[11]
References
[edit | edit source]- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Bouchet P. & Rocroi J.-P. (Ed.); Frýda J., Hausdorf B., Ponder W., Valdes A. & Warén A. 2005. Classification and nomenclator of gastropod families. Malacologia: International Journal of Malacology, 47(1-2). ConchBooks: Hackenheim, Germany. Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).. ISSN 0076-2997. 397 pp. http://www.vliz.be/Vmdcdata/imis2/ref.php?refid=78278
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
Lua error in Module:Taxonbar at line 165: attempt to index field 'wikibase' (a nil value).