Uberon definition : An outgrowth on the lateral trunk of the embryo that develops into a limb or paired
fin. The limb/fin bud is divided into ectoderm and mesenchyme[cjm, modified from MP].;
Uberon synonym : paired appendage bud; limb - fin bud;
Uberon Homology note : The tetrapod limb is derived from a posterior part of the fin endoskeleton of elasmobranchs
and basal bony fish, the so-called metapterygium, a series of endoskeletal elements
that is the first to form in the developing paired fins. (...) In addition, there
is an independent endoskeletal element called the protopterygium that develops anterior
to the metapterygium in many basal fishes (e.g., the bichir and sturgeon). Teleosts
have lost the metapterygium whereas the sarcopterygians, on the other hand, have lost
the protopterygium. Sarcopterygians thus develop all their endoskeletal structures
from the metapterygium and consequently the tetrapod limb skeleton is derived from
the metapterygium.[uncertain][VHOG];
An outgrowth on the lateral trunk of the embryo that develops into a limb or paired
fin. The limb/fin bud is divided into ectoderm and mesenchyme[cjm, modified from MP].
develops into