What is Strepsirrhini?
{{Taxobox | name = Strepsirrhini | fossil_range = Early [[Eocene]] - Recent | image = Propithecus_verreauxi.JPG | image_width = 209px | image_caption = [[Coquerel's Sifaka]] (''Propithecus verreauxi'') | regnum = [[Animal]]ia | phylum = [[Chordate|Chordata]] | classis = [[Mammal]]ia | ordo = [[Primate]]s | subordo = '''Strepsirrhini''' | subordo_authority = [[Étienne Geoffroy Saint-Hilaire|E. Geoffroy]], 1812 | subdivision_ranks = [[Order (biology)|Infraorders]]}} The '''Strepsirrhini''' clade is one of the two suborders of [[primate]]s, with 114 species. They are defined by their wet noses, although the Greek name means having a curved or bent nose. [[Madagascar]]'s only primates (apart from [[human]]s) are strepsirrhines, although others can be found in southeast [[Asia]]. Their eyes have a reflective layer to improve their night vision called a tapetum lucidum, and their eye sockets have a ring of bone around the eye called a post-orbital bar.<ref>{{Citation|last=Scott McGraw|first=W.|title=Primates Defined|date=2023-03-08|url=https://onlinelibrary.wiley.com/doi/10.1002/9781119828075.ch17|work=A Companion to Biological Anthropology|pages=277–299|editor-last=Larsen|editor-first=Clark Spencer|edition=1|publisher=Wiley|language=en|doi=10.1002/9781119828075.ch17|isbn=978-1-119-82804-4|access-date=2024-02-09}}</ref> Strepsirrhine primates produce their own [[vitamin C]], whereas haplorhine primates (including humans) must get it from their diets. The suborder contains the [[lemurs]] and [[lorises]]. The modern types probably evolved from the [[Adapiforms]], an extinct group. The origin of the earliest primates, from which both the strepsirrhines and haplorhines (simians and tarsiers) evolved, is a mystery. Both their place of origin and the group from which they evolved are uncertain. Although the [[Fossil|fossil record]] of their initial [[adaptive radiation|radiation]] across the [[Northern Hemisphere]] is very detailed,<ref>Rose K.D. 2006. ''The beginning of the age of mammals''. Johns Hopkins University P