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meaning: "Forest dweller"
Named By: John William Dawson in 1860
Time Period: Pennsylvanian, 312 Ma
Location: Canada, Nova Scotia
Size: 20 centimetres long
Diet: unavailable
Fossil(s): Several specimens, fossilised footprints found in New Brunswick
Classification: | Chordata | Reptilia | Captorhinida | Protorothyrididae |

Hylonomus (hylo- "forest" + nomos "dweller") is an extinct genus of reptile that lived 312 million years ago during the Late Carboniferous period. It is the earliest unquestionable reptile (Westlothiana is older, but in fact it may have been an amphibian, and Casineria is rather fragmentary). The only species is the type species Hylonomous lyelli.

Read more about Hylonomus at Wikipedia
PaleoCodex is a weekend hack by Saurav Mohapatra