Stomodaeum - definition of stomodaeum by The Free Dictionary
Also found in: Medical
sto·mo·de·um also sto·mo·dae·um (stō′mə-dē′əm)
n. pl. sto·mo·de·a
also sto·mo·dae·a (-dē′ə)
The anterior or oral portion of the digestive tract of an embryo.
[New Latin : Greek stoma, mouth + Greek hodaios, on the way (from hodos, road).]
sto′mo·de′al (-dē′əl) adj.
, pl -daea or -dea
(Zoology) the oral cavity of a vertebrate embryo, which is formed from an invagination of the ectoderm and develops into the part of the alimentary canal between the mouth and stomach
[C19: from New Latin, from Greek stoma mouth + hodaios on the way, from hodos way]
ˌstomoˈdaeal, ˌstomoˈdeal adj
References in periodicals archive
Two mutually perpendicular planes of symmetry run along the oral-aboral axis: the sagittal plane in which the flattened stomodaeum
lies, and the tentacular plane passing through the two tentacle pouches (Fig.
1A), and, on some specimens, the cuticular intima of the stomodaeum
. The labrum (11) is a relatively large somewhat rectangular plate that extends obliquely and posteroventrally from the frontoclypeal margin between the adnasale that is surrounded by less heavily sclerotized epipharyngeal tissues.
tuberculata: expression was weak in the stomodaeum
and oral field, which degenerate at metamorphosis, and stronger in the stomach and rectum, which are retained in the adults.