How do Argasid ticks differ physically from Ixodid ticks regarding their dorsal shield?
Answer
They lack the rigid dorsal shield (scutum).
Argasid ticks, also known as soft ticks, are characterized by their leathery, wrinkled skin. A key anatomical distinction mentioned is the absence of the rigid dorsal shield, or scutum, which is prominently found on their hard-shelled counterparts, the Ixodid ticks. This lack of a hard external plate contributes to their softer appearance, setting them apart morphologically from Ixodids, which rely on this shield for protection.
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