What distinct morphological feature defines *I. pacificus* belonging to Family Ixodidae?
Answer
Possession of a distinct dorsal shield (scutum)
The classification of *Ixodes pacificus* into Family Ixodidae, commonly known as the hard ticks, is predicated on the presence of a scutum, or hard shield, covering a significant portion of the dorsal surface, especially prominent in adult females. This physical attribute is essential for species identification and differentiation from soft ticks. Furthermore, specialists often examine details related to the mouthparts' structure and the presence or absence of grooves near the capitulum's base when distinguishing species within this particular family.
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