Caracterização morfológica de Marava arachidis, (Dermaptera: Labiidae) e Euborelia annullipes, (Dermaptera: Anisolabididae) para identificação do dimorfismo sexual.

Abstract

Dermaptera, such as the species Euborellia annulipes, are widely used in biological control, others like Marava arachidis also have potential for predation, which reveals the need for further studies. A frequent feature of dermaptera is sexual dimorphism. The objective of this research was to describe morphological characteristics that allow the identification of sexual dimorphism in individuals of M. arachidis and among individuals of E. annulipes and characteristics that differentiate species. The research was developed at the Invertebrate Zoology Laboratory of the Department of Biological Sciences at UFPB, campus II, located in the city of Areia-PB. The insects used came from the creations of E. annulipes and M. arachidis kept in that laboratory. For each instar of E. annulipes and M. arachidis (from the 1st to the 5th), 20 individuals were selected, and for the 4th and 5th instar, 10 males and 10 females. Totaling 100 individuals of each species. The characteristics that most differentiate the species are: the presence of a white distal article in E. annulipes; the number of antenomers, the body size in adults and the presence of wings in M. arachidis and absence in E. annulipes. In E. annulipes, sexual dimorphism is determined by the shape of the forceps: in females they are symmetrical and in asymmetric and curved males. In M. arachidis the forceps are cylindrical and tapered at the extremities, in males they are more curved and separated, in females, closer (parallel). The forceps of males are larger than those of females. In both species, females are larger than males.