Taxonomic notes on stingless bee Trigona (Tetragonula) iridipennis Smith (Hymenoptera: Apidae) from India

Stingless Bees are a large and diverse taxon and more than 500 species are recorded worldwide. Based on the previous reports, totally seven species are reported from India. The present study reports male and female morphological characteristics of Tetragonula iridipennis belonging to Tetragonula subgenus in Nellithurai Village, Tamil Nadu, India. The species of Tetragonula group are extremely similar in the external morphology of the workers. The glabrous bands on mesoscutum of female bees and structure and arrangement of gonostylus and the penis valve of male bees are used to separate T. iridipennis from other species in this group. The identity of T. iridipennis is made based on the male and female key morphological characteristics in the previous literature.