tracheal pit formation in open tracheal system
Formation of the tracheal pits, the first tube-like structures to form in the open tracheal system. Once cells are determined to their tracheal cell fate, the tracheal pits arise by invagination of each ectodermal cluster of tracheal placode cells, between 5 and 7 hours after egg laying. An example of this is found in Drosophila melanogaster.
GO:0048646
anatomical structure formation involved in morphogenesis
is_a
GO:0007424
open tracheal system development
part_of
tracheal placode invagination
related
tracheal sac formation
broad