ABSTRACT. Comparative description of the immature stages of two very similar leaf footed bugs, Holymenia clavigera (Herbst) and Anisoscelis foliacea marginella (Dallas) (Hemiptera, Coreidae, Anisoscelini). Holymenia clavigera (Herbst, 1784) and Anisoscelis foliacea marginella (Dallas, 1852) (Hemiptera, Coreidae) present a remarkable similarity regarding egg and nymphal morphology. On the contrary, their adult stages are remarkably different. This study describes and compares the immature stages of these two coreid species. Excepting for the last instar and the shape of the hind tibia from third to last instar, nymphs of both species were identical in their gross morphologies and ultrastructures. However, H. clavigera was significantly larger than A. foliacea marginella in all stages. Thus, we suggest that these species may have evolved through evolutionary convergence, parsimony between the immature stages after speciation, Müllerian mimicry or genetic drift.
KEYWORDS.Anisoscelini; coreids; immature stages; instar identification; passion vines.
RESUMO.Descrição comparada dos estágios imaturos de dois coreídeos, Holymenia clavigera (Herbst) e Anisoscelis foliacea marginella (Dallas) (Hemiptera, Coreidae, Anisoscelini). Holymenia clavigera (Herbst, 1784) e Anisoscelis foliacea marginella (Dallas, 1852) (Hemiptera, Coreidae) apresentam uma acentuada semelhança morfológica nos estágios de ovo e ninfa. Entrementes, os adultos são marcadamente distintos. Este estudo descreve e compara os estágios imaturos destas espécies. Excetuando-se a largura da tíbia do terceiro ao quinto instar ninfal, bem como o aspecto e coloração geral das ninfas de quinto ínstars, as ninfas de ambas as espécies foram idênticas em suas morfologias e ultraestruturas. Contudo, H. clavigera foi significativamente maior que A. foliacea marginella em todos os estágios. Desta forma, os imaturos de tais espécies podem ter evoluído através de convergência evolutiva, parcimônia das referidas fases após especiação, mimetismo mileriano ou deriva genética.
PALAVRAS-CHAVE.Anisoscelini; coreídeos; estágios imaturos; identificação de ínstares; maracujás.When compared to other insect orders as Lepidoptera or Coleoptera, hemipterans are not well studied in their physiology, ecology and evolution. However, many phytophagous species were described regarding their immature stages. Several of their host plants, in turn, are cultivated for economic purposes (see Schaefer & Panizzi 2000).The immature stages of some Coreidae (Heteroptera, Pentatomomorpha) have been described, including nearctic species such as Euthochtha galeator (Fabricius, 1803) (Fernandes & Grazia 1992), and Corecoris (=Spartocera) dentiventris Berg, 1884 (Caldas et al. 1998). Some african coreids had their immatures also briefly described (see Goodchild 1977). Most of these species are considered important from an economic point of view.Holymenia clavigera (Herbst, 1784) and Anisocelis foliacea marginella (Dallas, 1852) are distributed in southern Brazil and belong to the poorly studied tribe...