title: [A new case of twin species in a mimetic butterfly Acrea encedon L. (Lepidoptera, Acraeida)].
abstract: The large plumose setae are studied in Palaemon serratus (Decapoda) and Sphaeroma serratum (Isopoda) during premolt. The original arrangement of the cells is first described; it is the same in both species. The cells of the distal part of the matrix, in particular, are very long laminae, flattened at the basal end and ring-shaped at the apical end where each of them secretes a whole annular portion of the cuticular shaft of the setae. A characteristic feature of these cells is the great number of microtubules parallel to the length of the matrix.
mesh_terms: D000220:Adaptation, Biological; D000349:Africa; D000818:Animals; D002080:Butterflies / Q000033:anatomy & histology / Q000145:classification*; D005260:Female; D007915:Lepidoptera / Q000145:classification*; D008297:Male
vernacular_title: Un nouveau cas d'espèces jumelles chez un papillon mimétique, Acraea encedon L. (Lépidoptère Acraeide)