Species Profile
Hylonomus ✝︎
Early reptile
KingdomAnimalia
PhylumChordata
ClassReptilia
OrderUnknown
FamilyUnknown
Introduction
Hylonomus lived about 315 million years ago.
Fossils were found in North America.
It represents early amniote evolution.
Size & Structure
01
Small lizard-like body
02
Slender limbs
03
Long tail
04
Sharp teeth
Hylonomus ✝︎ — 3D Model
No 3D model available
General Features
- Coelom
- True coelom
- Body plan
- Tube within a tube body plan (Deuterostomous)
- Germ layer
- Triploblastic
- Metamerism
- Absent
- Body symmetry
- Bilateral
- Fertilization
- Internal
- Digestion type
- Complete
- Nervous system
- Moderately developed
- Excretory organ
- Kidneys
- Body temperature
- Poikilothermic
- Circulatory type
- Closed, double, incomplete double
- Development type
- Direct (oviparous)
- Respiratory type
- Pulmonary respiration
- Mode of excretion
- Uricotelism
- Circulation system
- Closed
- Skeleton structure
- Endoskeleton
- Level of Organisation
- Organ system level
- Regulation of Osmosis
- Osmoregulator
Ecology
Insect predator
Early terrestrial vertebrate
Forest floor inhabitant
Economic Importance
Important fossil in reptile evolution
Helps trace origin of amniotes
Paleontological significance