Osteoderm
Definition
Bone embedded within the skin dermis, characteristic of crocodilians and some lizards. Survives tanning and provides a species-group identification marker visible as a hard, calcified structure in a cross-section or under X-ray.
- Definition
- Bone embedded within the skin dermis
- Found in
- Crocodilians and some lizards
- Forensic use
- Species-group identification marker
- Detection method
- Cross-section or X-ray, survives tanning
Common questions
Why is osteoderm detection useful for leather goods examined for wildlife trafficking?+
Because osteoderms survive the tanning process, an X-ray or cross-section of a finished leather item such as a bag or belt can still reveal the calcified plates, distinguishing genuine crocodilian or lizard skin from a synthetic or embossed imitation.
Can osteoderms identify the exact species, or only a broader group?+
Osteoderm presence and gross pattern typically narrow identification to a species group such as crocodilian versus lizard; distinguishing individual species within that group usually needs additional morphological or molecular analysis.
Related terms
- CITES Leather Guide
- A reference document maintained by the CITES Secretariat providing scale/pit patterns, macroscopic key characters, and species notes for major commercially traded reptile...
- Histological Cross-Section
- A 5-10 micrometre thin section cut perpendicular to the skin surface, stained and mounted for light microscopy. Reveals dermis architecture (collagen orientation,...
- Integumentary Sense Organ (ISO)
- Pressure and chemical sensory pits visible as small circular depressions on reptile scales. In crocodilians their distribution pattern distinguishes crocodiles from alligators...
- Lamellar Microstructure
- The layer-cake cross-section of pangolin scales visible under light microscopy, reflecting the keratinised plates that build up the scale. Distinguishes pangolin scales...
- Pit Pattern
- The arrangement of scale pits or ISO pores on reptile skin. Scale pit pattern is one of the primary characters in the...