Orthalicoidea

Orthalicoidea
A large orthalicid from eastern Peru (probably of genus Sultana), recovering from substantial shell damage.
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Heterobranchia clade Euthyneura clade Panpulmonata clade Eupulmonata clade Stylommatophora informal group Sigmurethra
Superfamily:	Orthalicoidea Albers, 1860
Families
See text

The Orthalicoidea are a superfamily of air-breathing land snails, terrestrial gastropod mollusks in the informal group Sigmurethra.^[1]

Taxonomy

2005 taxonomy

This taxonomy, as accepted by Bouchet & Rocroi, was based on the study by Nordsieck, published in 1986,^[2] and the classification as formulated by Schileyko in 1999.^[3] 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.^[1]

The following seven families have been recognized in the taxonomy of Bouchet & Rocroi (2005):

• Family Cerionidae Pilsbry, 1901
• Family Coelociontidae Iredale, 1937
• † Family Grangerellidae Russell, 1931
• Family Megaspiridae Pilsbry, 1904
• Family Orthalicidae Albers, 1860
• Family Placostylidae Pilsbry, 1946
• Family Urocoptidae Pilsbry, 1898 (1868)

2008 taxonomy

Uit de Weerd has moved two families Urocoptidae and Cerionidae to newly established superfamily Urocoptoidea based on molecular phylogeny research in 2008.^[4]

2009 taxonomy

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,^[5] while it was previously tentatively placed as a synonym of Aillyidae.^[1]

2011 taxonomy

There is an inventory of the type material of Orthalicoidea in progress and few publications providing new schemes in the taxonomy of Orthalicoidea are in preparation.^[6][7][8]

References

1. ^ ^{a b c} Bouchet P., Rocroi J.-P., Frýda J., Hausdorf B., Ponder W., Valdés Á. & Warén A. (2005). "Classification and nomenclator of gastropod families". Malacologia: International Journal of Malacology (Hackenheim, Germany: ConchBooks) 47 (1-2): 1–397. ISBN 3925919724. ISSN 0076-2997. http://www.archive.org/details/malacologia47122005inst. 
2. ^ Nordsieck H. (1986). "The system of the Stylommatophora (Gastropoda), with special regard to the systematic position of the Clausiliidae, II. Importance of the shell and distribution". Archiv für Molluskenkunde 117 (1–3): 93–116. 
3. ^ Schileyko A. A. (1998–2003). "Treatise on recent terrestrial pulmonate molluscs". Ruthenica suppl. 2: 1–1626. 
4. ^ Uit de Weerd D. R. (2008). "Delimitation and phylogenetics of the highly diverse land snail family Urocoptidae (Gastropoda, Pulmonata) based on 28S rRNA sequence data: A reunion with Cerion". Journal of Molluscan Studies 74: 317-329. doi:10.1093/mollus/eyn023.
5. ^ Herbert D. G. & Mitchell A. (2009). "Phylogenetic relationships of the enigmatic land snail genus Prestonella: the missing African element in the Gondwanan superfamily Orthalicoidea (Mollusca: Stylommatophora)". Zoological Journal of the Linnean Society 96 (1): 203–221. doi:10.1111/j.1095-8312.2008.01109.x. http://www3.interscience.wiley.com/journal/121575282/abstract?CRETRY=1&SRETRY=0. 
6. ^ Breure A. S. H. & Romero P. (In preparation). "Support and surprises: a new molecular framework for the Orthalicoidea (Mollusca, Gastropoda) using a multi-locus gene analysis and ancestral area reconstruction".
7. ^ Breure A. S. H. (2011). "Annotated type catalogue of the Orthalicoidea (Mollusca, Gastropoda) in the Royal Belgian Institute of Sciences, Brussels, with description of two new species". ZooKeys 101: 1-50. doi:10.3897/zookeys.101.1133.
8. ^ Borrero F. J. & Breure A. S. H. (Submitted). "The Orthalicoidea (Mollusca: Gastropoda: Stylommatophora) from Colombia and adjacent areas: a review of taxonomy and biogeography. 1. Dryptus Albers, 1860 and Plekocheilus Guilding, 1828".

Further reading

• Breure A. S. H., Groenenberg D. S. J. & Schilthuizen M. (2010). "New insights in the phylogenetic relations within the Orthalicoidea (Gastropoda, Stylommatophora) based on 28S sequence data". Basteria 74(1-3): 25-31.