Ctenidia Collection

Ctenidia, also known as comb-like structures or gills, play a crucial role in the respiratory system of various flea species

Hedgehog flea, SEM
Hedgehog flea (Archaeopsylla erinacei), coloured scanning electron micrograph (SEM). The two structures protruding from the centre of the fleas head are sensory palps

Squirrel flea, SEM
Squirrel flea (Orchopeas howardi howardi), coloured scanning electron micrograph (SEM). The two structures protruding from the centre of the fleas head are sensory palps

Dog flea, SEM
Dog flea. Coloured scanning electron micrograph (SEM) of a dog flea (Ctenocephalides canis). Adult dog fleas are 2-4mm long and have long combs, known as ctenidia, on both the thorax and the head

Cat fleas head, SEM

Ctenidia Collection: Head and thorax of a cat flea, SEM

Head and thorax of a cat flea, SEM
Head and thorax (upper body) of a cat flea (Ctenocephalides felis), coloured scanning electron micrograph (SEM). The head (upper right)

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Ctenidia, also known as comb-like structures or gills, play a crucial role in the respiratory system of various flea species. These microscopic wonders can be observed under scanning electron microscopy (SEM), revealing intricate details and adaptations. In the world of fleas, different species have evolved unique ctenidia to suit their specific hosts. The SEM images showcase this diversity, starting with the Cat flea's ctenidia resembling delicate combs that aid in respiration. Moving on to the Rabbit flea, its SEM image reveals similar comb-like structures adapted for survival on rabbits. The Squirrel flea's SEM image unveils its specialized ctenidia designed for efficient gas exchange while infesting squirrels. Likewise, the Hedgehog flea exhibits distinct comb-shaped gills seen through SEM that enable it to thrive on hedgehogs. Notably, even among fleas targeting dogs, variations in ctenidia structure are evident from their respective SEM images. The Dog flea boasts intricately arranged gill-like projections that facilitate oxygen uptake during its parasitic lifestyle. Zooming closer into these fascinating creatures' anatomy using SEM allows us to explore minute details like never before. Captivatingly detailed close-ups of cat and dog flea heads captured by SEM reveal not only their unique mouthparts but also provide insights into how they adapt to feed on their respective hosts effectively.