Graphic illustration of a male and a female Fortuynia atlantica showing the remarkable sexual dimorphism and highlighting measured continuous dorsal and ventral variables.
Dorsal aspect (left and center): bl–body length, dPtI–distance between pedotecta I, db–distance between bothridia, ll–lenticulus length, nwda−notogastral width on level of seta da, nwlm−notogastral width on level of seta lm, dlp–distance between lateral protuberances (only males), nwdp−notogastral width on level of seta dp (only in females). Ventral aspect: cl–camerostome length, cw–camerostome width, dcg–distance between camerostome and genital orifice, dac3 –distance between acetabula 3, gl–genital orifice length, gw–genital orifice width, al–anal opening length, aw–anal opening width. (Sexually dimorphic variables shown in weaker color).
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