The phylogenetic information carried by a new set of morphological characters in planthoppers: the internal mouthpart structures and test in the Cixiidae model (Hemiptera: Fulgoromorpha).
Internal morphological structures of Cixiidae mouthparts are described and compared in various representatives of the Cixiidae and several other representatives of hemipterans. The morphological study shows that the mouthpart structures have not evolved uniformly and reveals the great disparity of these structures. Particularly, the connecting system of the mouthparts, localisation of salivary canal and shape of the mandibular and maxillar stylets provide together a new set of 17 new characters. A parsimonious analysis to evaluate the phylogenetic interest carried by these 17 selected characters shows that mouthpart structures have not evolved anarchically, but that they indeed carry some phylogenetic information that will be useful to be included in further morphological phylogenetic analysis.
Department of Zoology, University of Silesia, Bankowa 9, 40-007 Katowice, Poland.
Jolanta
J
Brożek
Département Systématique and Evolution, Museum National d'Historie Naturelle, UMR 7205 MNHN-CNRS (ISEB), CP-50, 45 rue Buffon, 75005 Paris, France.
Thierry
T
Bourgoin
Cixiidae; Food and salivary canals; Fulgoromorpha; Internal connecting systems; Maxillary locks; Mouthparts