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THE FIRST MYGALOMORPH SPIDER WITHOUT SPERMATHECAE: SICKIUS LONGIBULBI, WITH A REVALIDATION OF SICKIUS (ARANEAE, THERAPHOSIDAE, ISCHNOCOLINAE)

Abstract The monotypic Brazilian genus Sickius Soares & Camargo 1948 is revalidated, rediagnosed, and tentatively transferred to the Ischnocolinae. The formerly unknown female of S. longibulbi Soares & Camargo 1948 is found to lack spermathecae. This unusual genital feature, not found in any other mygalomorph spider species, is described and discussed.