What key leg count distinguishes the Class Arachnida of *I. pacificus* from insects?
Answer
Eight legs in their adult and nymphal stages
The designation into Class Arachnida is critical because it defines a major separation between ticks and insects based on appendage count. Arachnids, including spiders, scorpions, mites, and ticks like *I. pacificus*, possess eight legs when they reach maturity or the nymphal feeding stage. In contrast, insects are defined by having six legs. This structural difference is a fundamental characteristic used in taxonomy to differentiate these major arthropod groups, reflecting distinct evolutionary paths within the overall phylum.
Related Questions
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