The genus Rhantus DEJEAN (Coleoptera)

Five species of Rhantus DEJEAN, 1833 (Coleoptera: Dytiscidae: Colymbetinae) occur in New Caledonia. Four of these, all belonging to the R. pacificus group (sensu BALKE 1993) are endemic: R. alutaceus FAUVEL, 1883, R. monteithi BALKE, WEWALKA, ALARIE & RIBERA, 2007, R. novaecaledoniae BALFOUR-BROWNE, 1944, and R. poellerbauerae BALKE, WEWALKA, ALARIE & RIBERA, 2007. The fifth species, R. suturalis MACLEAY, 1825 is a member of the R. suturalis species group and very wide-spread in the Old World. A taxonomic overview, including the known larvae of the endemic species, is provided.