Preferred Label : naris;
Uberon definition : Orifice of the olfactory system. The naris is the route by which odorants enter the
olfactory system[MAH].;
Uberon Homology note : Naris refer to the external and interior naris (choana) of tetrapods, and to anterior
and posterior naris of zebrafish. It seems now accepted that the structure is homologous:
The choana, a unique 'internal nostril' opening from the nasal sac into the roof of
the mouth, is a key part of the tetrapod (land vertebrate) respiratory system. It
was the first component of the tetrapod body plan to evolve, well before the origin
of limbs, and is therefore crucial to our understanding of the beginning of the fish-tetrapod
transition. (...) Here we present new material of Kenichthys, a 395-million-year-old
fossil fish from China, that provides direct evidence for the origin of the choana
and establishes its homology: it is indeed a displaced posterior external nostril
that, during a brief transitional stage illustrated by Kenichthys, separated the maxilla
from the premaxilla.[well established][VHOG];
Uberon Taxon note : in actinopterygians, both pairs of nares are external. In tetrapods, the exhalant
empties into the buccal cavity;
Origin ID : 0000003;
Automatic exact mappings (from CISMeF team)
- Uberon cross reference
- connects
- has part
- part of
Orifice of the olfactory system. The naris is the route by which odorants enter the
olfactory system[MAH].
