epistome


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epistome

the area immediately surrounding the mouth in some animals, particularly
  1. the area between the antennae and mouth in Crustacea
  2. the part of the head in insects, immediately behind the labrum
  3. the overhanging lobe above the mouth in Polyzoa.
References in periodicals archive ?
Front bilobed, bent downwards, but middle sinus retracted, leaving exposed middle portion of epistome in dorsal view, epistome strongly advanced, opening of efferent channels strongly arched, forming 2 well defined spouts.
shapes of epistome, tritosternum, chelicerae and hypostomal setae), the genus Neodiscopoma is treated as a species group within the genus Uropoda, as the Uropoda splendida group.
For example, the ocular area becomes broadened with increasing width of the carapace; the subocular plate and the epistome are gradually projected forward and the eyestalks degenerate.