Morphology of the ventral tube of males of Sphaeridia spp. (cont.) A posterior side in S. peruensis Bretfeld & Schulz, 2012 B apex in S. peruensis C posterior side in S. pilleata Bretfeld & Gauer, 1994 D posterior side in S. schalleri Massoud & Delamare-Deboutteville, 1964 E posterior side in S. squamifera Bretfeld & Gauer, 1994 F anterior side in S. squamifera G apex in S. spira Bretfeld & Gauer, 1994 H apex in S. spira, detailed view of the two asymmetrical lobes I posterior side in S. sturmi Bretfeld & Gauer, 1994 J apex in S. sturmi K posterior side in S. torifera Bretfeld & Schulz, 2012. Figures adapted from species’ original descriptions, with the exception of S. schalleri which was adapted from Bretfeld (1997).