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Superfamily of gastropods From Wikipedia, the free encyclopedia
The Orthalicoidea are a superfamily of air-breathing land snails, terrestrial gastropod mollusks in the infraorder Orthalicoidei of the suborder Helicina[2]
Orthalicoidea | |
---|---|
A large orthalicid from eastern Peru (probably of genus Sultana), recovering from substantial shell damage. | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Gastropoda |
Superorder: | Eupulmonata |
Order: | Stylommatophora |
Suborder: | Helicina |
Superfamily: | Orthalicoidea Albers, 1860 |
Families | |
See text | |
Diversity[1] | |
~1750 taxon names are available |
The Orthalicoidea is a dominant faunal element in the Neotropics, but also has a number of genera with a Gondwanan distribution.[1]
This taxonomy, as accepted by Bouchet & Rocroi, was based on the study by Nordsieck, published in 1986,[3] and the classification as formulated by Schileyko in 1999.[4] However Bouchet & Rocroi diverged from this classification in uniting the families Bulimulidae and Orthalacidae. They also considered the family Placostylidae as a distinct family from Orthalicidae, and the family Coelociontidae a distinct family from Urocoptidae. However, the position of the families Megaspiridae and Grangerellidae is doubtful.[5]
The following seven families have been recognized in the taxonomy of Bouchet & Rocroi (2005):
Uit de Weerd moved two families Urocoptidae and Cerionidae to newly established superfamily Urocoptoidea based on molecular phylogeny research in 2008.[6]
Family Prestonellidae van Bruggen, 1978 - A study by Herbert and Mitchell, published in 2009, places this enigmatic family, of which the phylogenetic relationships were previously unknown, in the Gondwanan superfamily Orthalicoidea,[7] while it was previously tentatively placed as a synonym of Aillyidae.[5]
Breure et al. (2010)[8] moved Prestonella and Bothriembryon to Placostylidae and they elevated Bulimulinae to Bulimulidae, Odontostomini to Odontostomidae, Amphibuliminae to Amphibulimidae.[8] They also removed Coelociontidae from Orthalicoidea.[8]
Breure & Romero (2012)[9] confirmed previous results from 2010, additionally they elevated Simpulopsini to Simpulopsidae, renamed Placostylidae to Bothriembryontidae.[9] Therefore, there are recognized seven extant[9] families and one extinct[5] family within Orthalicoidea:
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