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Photo#41505
Wavy-Lined Zanclognatha - Zanclognatha jacchusalis - male

Wavy-Lined Zanclognatha - Zanclognatha jacchusalis - Male
Town of Baileys Harbor, Hidden Corners Sanctuary, Door County, Wisconsin, USA
July 30, 2003
Adult came to night light. First time I ever got one to exhibit its hairy legs. ID made from specimen.

Forelegs
There is another post now of dorsal and ventral views of this species with forelegs extended:

So yes, they are indeed legs. Note from the ventral view that the prothorax is highly reduced in size, making the forelegs as far forward as possible.

Great shot as usual
Those feathery structures are amazing. Can you elaborate on what they are?

 
Wavy-Lined Zanclognatha
Janice J. Stiefel That's a good question, Beatriz. I assumed they were legs, but maybe someone else has a better answer. I thought the other photos I have of this species, just weren't revealing their legs. There's a reason why I entitled my moth slide program, "Masters of Display, Deception and Intrigue." Every day brings another surprise!!

 
Pheromone pencils?
I'm guessing these are "pencils", hair-like extensible processes of the (usually) abdomen, but here on the legs? They exude pheromones, and are found in some female moths. I've seen just one example, from a Pyralid, Diaphania, in Costa Rica. One of our species in this genus is called "Melonworm" and has the pencils as well--see this page, and the account at the Univ. of Florida. I did not know they occurred in other families of moths. A very neat find.

This is an, I think, reasonable hypothesis.

Patrick Coin
Durham, North Carolina

 
A couple of hints
This moth is a male! In England, members of the genus Zanclognatha are commonly called "Fan-foots".

 
Kinky Antennae
Is the kink on the antennae an indication that this is a male? Then Robin's specimen #24475 would also be a male.
What is the function of the fan legs? could it be that the male can smell the female pheromones with them? Lyn's image #27744 also seems to have feathery structures.
What about Z. pedipilalis? With that name I would expect them to have hairy legs .

 
Yes,
a male character seen on all species in the genus. Have never seen anyone attempting to assign a function to this structure descibed by Forbes (Leps. of NY): "male antennae heavily ciliate, with a knot and tuft at about a third its length and two or three segments bearing strong claws".

 
Ideas on function?
Any hypotheses on the function of these structures? Are they thought to be camouflage?

Doing a search on "fan-foot" I found another good photo on this page, of Zanclognatha tarsipennalis, showing the fan-feet.

Patrick Coin
Durham, North Carolina

 
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