''Catharylla chelicerata'' is a

moth Moths are a paraphyletic group of insects that includes all members of the order Lepidoptera that are not butterflies, with moths making up the vast majority of the order. There are thought to be approximately 160,000 species of moth, many of w ...

of the family

Crambidae The Crambidae are the grass moth family of lepidopterans. They are variable in appearance, the nominal subfamily Crambinae (grass moths) taking up closely folded postures on grass stems where they are inconspicuous, while other subfamilies includ ...

described by Théo Léger and Bernard Landry in 2014. It is found in

French Guiana French Guiana ( or ; french: link=no, Guyane ; gcr, label=French Guianese Creole, Lagwiyann ) is an overseas departments and regions of France, overseas department/region and single territorial collectivity of France on the northern Atlantic ...

and Amazonas,

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

. The length of the forewings is 10.5–15 mm for males and 15–19.5 mm for females. The costal band of the forewings is wide and brown from the base to the apex. The median and subterminal transverse lines are faded brown and there are dark brown spots on the apical margin, forming a more or less continuous line. The hindwings are snow white, with marginal spots between the veins.

Etymology

The species name refers to the shape of the costal arms of the male valve, which look like

mygalomorph The Mygalomorphae, or mygalomorphs, are an infraorder of spiders, and comprise one of three major groups of living spiders with over 3000 species, found on all continents except Antarctica. Many members are known as trapdoor spiders due to the ...

chelicerae The chelicerae () are the mouthparts of the subphylum Chelicerata, an arthropod group that includes arachnids, horseshoe crabs, and sea spiders. Commonly referred to as "jaws", chelicerae may be shaped as either articulated fangs, or similarly ...

(spider mouthparts).

References

Argyriini Moths of South America Lepidoptera of Brazil Lepidoptera of French Guiana Moths described in 2014 {{Argyriini-stub