Term:

Anther theca (pl. = thecae)
Definition:

The chambers of an anther in which the pollen is produced. Same as pollen sac.
Notes:

In neotropical Lecythidaceae, up until near the time of anther dehiscence there are two anther thecae on each side of the anther connective but the walls between these thecae break down so there are only two thecae by the time the anthers dehisce (one on each side of the anther).