An internal chamber on the valvocopula of the genus Mastogloia. Usually found in a row on each side of the valvocopula. Plural is partecta. The partecta secrete strands of mucilage through tubes running to the outside of the diatom valve.
A synonym for partectum.
An alternate term for partectum, used in some of the older literature (Stoermer et al., 1964).
Round, F.E., Crawford, R.M. and Mann, D.G. (1990). The Diatoms. Biology and Morphology of the Genera. Cambridge University Press, Cambridge, 747 pp.
Stoermer, E.F., Pankratz, H.S. and Drum, R.W. (1964). The fine structure of Mastogloia grevillei Wm. Smith. Protoplasma 59: 1-13.
Image Credit: Pat Kociolek
Light micrographs of Mastogloia smitii. On the right, a high level of focus showing the valve face. On the left, a deeper level of focus revealing the valvocopula, with a row of partecta on each side.
Image Credit: Loren Bahls
Light micrographs of the valvocopula of M. pumila. On the left, the entire valvocopula. On the right, several partecta, with one partectum marked by an arrow.