Rhantus suturalis
"siphon" on tip of abdomen
Top picture: the tip of a larva's abdomen van een 2nd instar larva (moulted once). The short spines
on the cerci (tail-appendages) in combination with the scarse longer hairs (setae) are
specific for this species. The mirror image in the watersurface shows how the the tip of the abdomen
pulls a dimple in the watersurface. Because of that, the top plate with the two ventilation openings
lies dry above the water and makes contact with the air above.
Top view
The third instar larva (moulted twice) has only the long hairs on the
cerci, as may be
seen on the picture at the left. At right the tip of the abdomen of a 2nd instar larva is put beside
one of a 3d instar larva, at the same scale. On the right picture the course of the airduct is
visible. The last segment of the 2nd instar larva is supposed to be relative wider and shorter than
that of the 3d instar. That is not clearly visible here.
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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 pictures or place
them on other websites without the author's approval. Should you need them for purposes which
include third parties, you must ask the author permission by
e-mail.
People, who want to use this pictures for exhibitions or publications or educative material are much
encouraged to do so, after approval as mentioned and giving the normal credits.
rev.13-07-2008
www.microcosmos.nl/beet1/rhantusl11.htm
