Parascaris

{{Short description|Genus of roundworms}}

{{Automatic taxobox

| image = Ascarid1 (5842674095).jpg

| image_caption = Male (top) and female (bottom) P. equorum

| taxon = Parascaris

| authority = Yorke & Maplestone, 1926

| subdivision_ranks = Species

| subdivision =

• Parascaris equorum
• Parascaris univalens

}}

Parascaris is a genus of nematodes in the family Ascarididae. It contains two species, Parascaris equorum and Parascaris univalens, which are morphologically identical, but can be distinguished by chromosome number. Both species parasitize horses.{{cite journal|last1=Nielsen|first1=Martin K.|last2=Wang|first2=Jianbin|last3=Davis|first3=Richard|last4=Bellaw|first4=Jennifer L.|last5=Lyons|first5=Eugene T.|last6=Lear|first6=Teri L.|last7=Goday|first7=Clara|title=Parascaris univalens—a victim of large-scale misidentification?|journal=Parasitology Research|volume=113|issue=12|year=2014|pages=4485–4490|issn=0932-0113|doi=10.1007/s00436-014-4135-y|pmid=25231078 |s2cid=253976230 }}