Lamellipalpodes asmita sp. nov. (Coleoptera: Lampyridae: Ototretinae), a new species of non-luminous firefly from West Bengal, India with SEM study of mechano- and chemoreceptive sensilla

Abstract

A new species of non-luminous firefly, Lamellipalpodes asmita Chakrovorty & Bhattacharjee sp. nov. (Coleoptera: Lampyridae: Ototretinae) discovered from the campus of the University of Kalyani, West Bengal, India is described, illustrated and compared with other known species of the genus from India. The male genitalia, morphometry and other important characters are illustrated and described. Additionally, a dichotomous identification key to Indian Lamellipalpodes is provided. The mechanoreceptive and chemoreceptive sensilla of Lamellipalpodes asmita Chakrovorty & Bhattacharjee sp. nov. were studied utilizing scanning electron microscopy. Ten different types of sensilla namely, sensilla ampullacea, sensilla basiconica, sensilla chaetica, sensilla coeloconica, sensilla placodea, sensilla styloconica, sensilla trichodia, cone-shaped sensillum, dome-shaped sensilla, peg-like sensilla and their twenty-four different subtypes have been identified with maxillary and labial palps possessing eight subtypes not found on antennomeres. Cone-shaped, dome-shaped and peg-like sensilla were of distinct, previously unknown morphology. This study unravels the significance of the atypical maxillary palp and labial palp morphology of the species and sheds light on structure–function relationship of these unusual morphological features.