The male of the Florida funnel-web building wolf spider species Sosippus placidus Brady 1972 is described and figured for the first time. Analysis of the male palp's morphological structure reveals that Sosippus possesses a median apophysis like other members of the Araneoclada, but which of the three additional tegular apophyses is the conductor cannot be determined at present. The study demonstrates that the palea, the putative key apomorphy of the clade Venoniinae-Allocosinae-Pardosinae-Lycosinae requires further morphological analysis. The genus Porrimosa is a close relative of the genus Sosippus based on shared characters in the male palp. The ontogeny of the female copulatory organs of Sosippus agrees with that of other members in the RTA clade. Hippasella nitida Mello-Leitão 1944, placed by Capocasale (1990) in the genus Sosippus, is not recognized as a congener.