Peronia

{{Short description|Genus of gastropods}}

{{Hatnote|Peronia is also a synonym for Thalia (plant).}}

{{Use dmy dates|date=May 2017}}

{{Automatic taxobox

| image = Peronia willani (10.3897-zookeys.972.52853) Figure 60 (cropped-A).jpg

| image_caption = Peronia willani

| taxon = Peronia

| authority = Fleming, 1822{{No-gastropod-genus-ref}}

| synonyms_ref =

| synonyms =

• Eudrastus Gistel, 1848
• Onchis Férussac, 1822
• Paraperonia Starobogatov, 1976
• Quoya Labbé, 1934
• Quoyella Starobogatov, 1976 (unnecessary replacement name for Quoya Labbé, 1934, by Starobogatov by Starobogatov treated as a junior homonym of "Quoya Deshayes, 1843"; the latter is in fact an incorrect subsequent spelling of Quoyia Gray, 1839 [Planaxidae])

}}

Peronia is a genus of air-breathing sea slugs, a shell-less marine pulmonate gastropod mollusks in the family Onchidiidae.{{WRMS species|205157|Peronia Fleming, 1822||30 September 2010}} These slugs differ from other onchidiid slugs in having branched "gills" on their dorsal side, although these can be retracted.{{Cite journal|last1=Dayrat|first1=Benoît|last2=Goulding|first2=Tricia C.|last3=Apte|first3=Deepak|last4=Aslam|first4=Sadar|last5=Bourke|first5=Adam|last6=Comendador|first6=Joseph|last7=Khalil|first7=Munawar|last8=Ngô|first8=Xuân Quảng|last9=Tan|first9=Siong Kiat|last10=Tan|first10=Shau Hwai|date=2020-01-10|title=Systematic revision of the genus Peronia Fleming, 1822 (Gastropoda, Euthyneura, Pulmonata, Onchidiidae)|url=https://zookeys.pensoft.net/article/52853/|journal=ZooKeys|language=en|issue=972|pages=1–224|doi=10.3897/zookeys.972.52853|issn=1313-2970|pmc=7544732|pmid=33071542|doi-access=free|bibcode=2020ZooK..972....1D }} More than two dozen species of Peronia have been described from the Indo-West Pacific, but a recent revision of the genus determined that 21 of these names are synonyms. Nine species of Peronia are recognized, most of which can differentiated only by examining their internal anatomy or with DNA sequencing.