A new Asian subgenus and species of Ischalia (Coleoptera: Ischaliidae) with an assessment of subgeneric concepts, revised world checklist, and keys to the subgenera and 'blue elytra' species

摘要

A new subgenus of Ischalia, Nitidischalia, and new species, Ischalia (Nitidischalia) barclayi, is described and illustrated from Sabah, Malaysia. Subgeneric concepts are discussed and an updated world checklist of subgenera and species is presented. Arevised key to the Southeast Asian Ischalia species exhibiting blue elytra is also presented, as is a key to the subgenera of Ischalia.Due in part to a number of autapomorphies expressed by both larvae and adults, Nikitsky (1992) proposed elevating members of Ischalia to familial status. Until a more thorough phylogenetic analysis of heteromerous Coleoptera is completed, the question offamilial placement for Ischalia will remain open. However, the position of Nikitsky has been followed in recent publications, including this paper.