Figure 2 from: Oliva A (2012) A new species of Oxelytrum Gistel (Coleoptera, Silphidae) from southern Argentina, with a key to the species of the genus. ZooKeys 203: 1-14. https://doi.org/10.3897/zookeys.203.2837

Figure 2 - Oxelytrum selknan and Oxelytrum biguttatum, male genitalia, dry mounted. A Oxelytrum selknan, male genitalia in dorsal aspect showing median lobe longer than paramera, gradually acuminate to apex. Scale bar= 0.5 mm. B Oxelytrum biguttatum, male genitalia in dorsal aspect, showing median lobe shorter than paramera, parallel-sided, abruptly acuminate at apex. Scale bar= 0.5 mm. C Oxelytrum selknan, apex of median lobe in lateral aspect, showing acuminate apex (arrow) and rounded ventral ridge. Scale bar= 0.2 mm. D Oxelytrum biguttatum, apex of paramera and median lobe in lateral aspect, showing median lobe shorter than paramera, with rounded ventral ridge. Scale bar= 1 mm.