Rhantus suturalis
(
synonyms Rhantus pulverosus, Rhantus punctatus )
Enlarged picture of the first page. The beetle (female) hangs
with its hind tip on the water surface to refresh its air supply, as all Dytiscidae do.
The photo below shows a male specimen, recognizable by the suction hairs on the tarses of
the front and middle legs. It hangs below the surface because it is lighter than water at
the time of the photo. The claws on the hind legs support this position; if the claws are
damaged or missing, this position is not possible (Wesenberg-Lund, 1943).
Male specimen (Scan of an older slide).
Also note the double swimming hair fringe on the hind legs, the female specimens only
have the fringe on the top, as clearly visible in the photo below.
The female copy of the first page.
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COPYRIGHT:
All pictures on this site were made by
Gerard Visser (Aadorp,
Netherlands), unless stated otherwise. All rights remain with him. These pictures may not be
used for purposes any other than private viewing or printing. Do NOT hardlink to these
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rev.12-06-2024
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