Abstract :
Antennae of Mantis religiosa and Gongylus gongylodes exhibit sexual dimorphism. In G. gongylodes the
male has pectinate antennae with terminal filiform structure but female has filiform antennae.The antennae of male
M. religiosa are longer than the female and filiform in both. Antennae of these two species posed for SEM studies
showed differences in the distribution of sensillae at basal, middle and terminal flagellomeres in both tsexes of
these species. In G. gongylodes the terminal segments had more number of sensilla chaetica and sensilla trichodea
than sensilla basiconica and coeloconica. In M. religiosa sensilla coeloconica were more in terminal segments of both
the sexes.Tip of antennae was flat, depressed and enclosed sensilla coeloconica in both the sexes.
Single hearing organ found in meso-metathoracic region on ventral side. In both species the structure of hearing
organ was of DK type in both sexes.
Keyword :
Sexual dimorphism, Flagellomeres, Sensillae, Terminal segments, Hearing organ , DK type