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External morphology of the antennae of Damalinia ovis (phthiraptera: Trichodectidae)
Author(s) -
Clarke Anthony R.
Publication year - 1990
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1052030207
Subject(s) - biology , antenna (radio) , anatomy , sexual dimorphism , morphology (biology) , ovis , sensillum , zoology , ecology , telecommunications , computer science
The antennae of adult Damalinia ovis , the sheep louse, were studied using light and scanning electron microscopy. Sensory structures are located on all three antennal segments with the predominant sensilla type being tactile. Nine different types of sensilla are described on the basis of external appearance. One of the sensilla, designated a “pit organ” because of its unusual shape, has not been described previously. A pair of these sensilla are present on each antenna, and their function is unknown. A group of 11 sensilla on the tip of each antenna contains olfactory and chemosensory pegs, and a possible thermohygroreceptor. The antennae are sexually dimorphic, the male having more tactile sensilla, two well‐developed terminal hooks, and a different cuticular architecture on the posterior surface of antennal segment 1.