Definition of "vitellarium"

In the hymenolepid cestode Fimbriaria fasciolaris, the vitellaria and uterus are continuous throughout the strobila.

1988, K. G. Adiyodi, Reproductive Biology of Invertebrates, Accessory Sex Glands, page 41

Germarium and vitellarium are distinct and the latter contains one or two small, immature basal oocytes.

2015 July 8, “Convergent Reduction of Ovariole Number Associated with Subterranean Life in Beetles”, in PLOS ONE‎