pedicellaria


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pedicellaria

(ˌpɛdɪsəˈlɛərɪə)
n
(Zoology) zoology one of the jaw-like extensions consisting of three pincers found on the body of echinoderms and used for defensive purposes
References in periodicals archive ?
The position of this structure is clear in Figure 4D, especially given its position relative to the musculature of the pedicellaria, which is a terminal structure.
To determine the protein and carbohydrate content of the juveniles after metamorphosis, four weeks after fertilization, (eight days after rudiment development and four days after pedicellaria had started to develop in well fed larvae), all the larvae that remained from the high concentration diet were pooled together and placed into 1-L beakers with water from the aquaria in which the adults were kept (about 30 larvae/ beaker).
Many urchins have, in addition to spines and water-tube feet, special appendages called pedicellaria that also form part of the water tube system.
Juvenile structures first became evident 77 days after fertilization (Table 1) in the form of podial buds exposed on the left side of the larva and a single pedicellaria at the base of the posterodorsal arms (Fig.