Synonyms and other taxonomic changes
described in 1854 by Guenee, who originally placed it in genus Salbia
6 other synonyms listed at All-Leps
, none more recent than 1886.
Explanation of Names
Marasmia trapezalis (Guenée, 1854), placed by some authors in the genus Cnaphalocrocis, is treated as a member of the genus Marasmia in Shaffer & Munroe (2003:63).
One of 2 species in this genus in North America listed at All-Leps
wingspan about 13 mm, based on photo by Jim Vargo at MPG
FW middle portion of st. line or shade is more widely separated from the pm. line than in cochrusalis. The HW pm. and st. lines of cochrusalis tend to be more narrowly separated with pm. line bending more toward the apex. The HW pm. line tends to align with the FW st. line in cochrusalis and with the pm. line in trapezalis.
Florida to Maryland, west at least to Oklahoma (based on this BugGuide image
by Mark Dreiling)
also occurs in Central and South America, Africa, and Asia
adults fly from May to August in Maryland
larvae feed on leaves of corn, rice, and other grains; second instar and later larvae fasten leaf margins together with silk, and feed hidden within the rolled leaf
Guenée, M. A. 1854: Deltoïdes et Pyralites. Pp. 200. – In: Boisduval, J. B. A. D. de & M. A. Guenée, Histoire Naturelle des Insectes. Species Général des Lépidoptères 8 8. – Roret, Paris.
pinned adult image
by John Glaser, plus dates and locations (Larry Line, Maryland)
3 pinned adult images
and collection site map showing presence in Florida (All-Leps)
world distribution; PDF doc
plus common name reference [Rice Leaffolder; larva], foodplants, larval description (E.A. Heinrichs and Alberto Barrion, Internation Rice Research Institute)
foodplant; PDF doc
and larval behavior (The Natural Enemies of Marasmia trapezalis
, a Pest of Maize and Jowar, Proceeding of the Indian Academy of Science)
(Markku Savela, FUNET)