Abstract
Male and pupa of Tanytarsus amazonicus sp. nov. as well as males of T. digitatus sp. nov., T. friburgensis sp. nov. and T. jacaretingensis sp. nov. from South America are described and diagnosed. The four species can be separated mainly by differences in the antennal ratio, dorsomedian extension of the eye, wing setation, shape of the anal tergal bands, anal point armament and in the form of the superior volsella, digitus and median volsella lamellae. Tanytarsus amazonicus sp. nov., T. digitatus sp. nov. and T. friburgensis sp. nov. do not seem to be closely related to any other described Neotropical Tanytarsus, while T. jacaretingensis sp. nov. is morphologically similar to T. monospinosus Ekrem & Reiss, 1999. Tanytarsus amazonicus sp. nov., T. digitatus sp. nov. and T. friburgensis sp. nov. are recorded from Brazil and T. jacaretingensis sp. nov. from Brazil and French Guyana.References
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