A genus of parasitic fleas known for their comb-like structures on their heads, which they use to attach to host animals.
From Greek 'ctenis' (comb) and 'kephalos' (head), literally meaning 'comb-headed.' The name refers to the distinct comb-like projections called ctenidia on the head of these fleas.
These fleas have evolved specialized 'combs' that work like tiny grappling hooks to cling to fur, and some species are responsible for transmitting plague bacteria historically!
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