The spindle-shaped embryo, with rostellar hooks and body spines, formed within the egg shell of Acanthocephala; this stage burrows into the body cavity of its first intermediate host, usually a crustacean in aquatic cycles, or insects in terrestrial cycles.
[G. akantha, thorn or spine]
Farlex Partner Medical Dictionary © Farlex 2012
References in periodicals archive ?
First, the relatively large size (0.02 mm; Moore 1946) of the hatched acanthor (the invasive stage of the acanthocephalan) means that encapsulation is the most likely defensive response to be used.
The possibility of similar results from other blaberids is tantalizing; unfortunately, blaberids have proven notoriously difficult to infect, even when hatched acanthors are injected directly into the hemocoel (Moore and Crompton 1993)!