asetigerous

asetigerous

[ā·sə′tij·ə·rəs]
(invertebrate zoology)
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References in periodicals archive ?
There are uncini, rather than acicular spines, in anterior segments and there is a single asetigerous preanal segment, all characteristic of the genus Axiothella.
somesi has 24 anal cirri which are alternately long and short and 2 asetigerous preanal segments.
Taxonomic features of cossurids are scarce, and refer principally to the number of asetigerous anterior segments, the origin of the branchial filament, the number of setigers in the anterior region, the structure of the pygidium, and types of setae.
number of anterior asetigerous segments, Laubier (1963) reported two for Cossura soyeri Laubier, 1963, naming the anterior one as the buccal segment or peristomium.
The specimens have 14 thoracic segments, and setigers one to three are asetigerous (as A.