Gonopod
outline (mesal view of left and right gonopod) in several Eutrichodesmus species. A–N Gonopods of species with mid-dorsal projections on metaterga A E. anisodentus B E. aster C E. asteroides D E. astriproximus E E. astrisimilis F E. cavernicola G E. deporatus H E. dorsiangulatus I E. lipsae J E. macclurei K E. paraster L E. pectinatidentis M E. steineri and N E. subasteroides O–Z Gonopods of species without mid-dorsal projections on metaterga O E. apicalis P E. arcicollaris Q E. armatocaudatus R E. armatus S E. basalis T E. cambodiensis sp. nov. U E. communicans V E. curticornis W E. demangei X E. digitatus Y E. distinctus and Z E. elegans. Not to scale. Figures modified from A, L Zhang (1995) B, C, V, Y Golovatch et al. (2009b) D, E, N Golovatch et al. (2016) F Sinclair (1901) G, K, M Liu and Wesener (2017) H, P Zhang in Zhang and Wang (1993) I, O Golovatch et al. (2015) J Hoffman (1977) Q, S, U Golovatch et al. (2009a) R Miyosi (1951) W Silvestri (1910) X Liu and Tian (2013) and Z Miyosi (1951).