rostellum

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rostellum

[rä′stel·əm]
(biology)
The anterior, flattened region of the scolex of armed tapeworms.
References in periodicals archive ?
without rostellar armature were considered a distinct genus) might be involved.
All Echinococcus species can be distinguished by the size and form of their rostellar hooks from protoscolices (1); for protoscolices from the patient reported here, the mean lengths of the small and large hooks were 34 and 43 pm, respectively.
Members of the newly proposed genus Versteria have morphologic features that distinguish them from members of the other taeniid genera, such as miniature rostellar hooks, small scolex, rostellum, and suckers; a short strobili; and a small number of testes (1).
Luhe noted that most of the specimens had lost their rostellar hooks but that they were still present in some organisms (Figure 2).