Abstract
Eleven new species of Hlavaciellus Jaloszynski, 2006 are described from Malaysia: H. adelphos, H. angustifrons, H. bi-foveatus, H. cirrus, H. clandestinus, H. decoratus, H. extremalis, H. metrios, H. miser, H. peninsularis, and H. smetanai. Diagnosticcharacters, including head modifications of males and aedeagi are illustrated, and detailed morphology of Hlavaciellus is described for the first time on the basis of disarticulated specimens. A preliminary parsimony-based phylogenetic analysis of mostcurrently known genera of the Cephenniini (with two genera of the Eutheiini as an outgroup) provided a robust support for the previously suggested placement of Hlavaciellus as a sister group taxon to Cephennodes Reitter, 1884. The Cephennomicrus group ofgenera was placed as a sister group to Cephennodes + Hlavaciellus.
NSTL