Figure 4 from: Smith P, Brouard J-P, Cacciali P (2022) A new species of Phalotris (Serpentes, Colubridae, Elapomorphini) from Paraguay. Zoosystematics and Evolution 98(1): 77-85. https://doi.org/10.3897/zse.98.61064

Figure 4 Hemipenis of P. shawnella showing the asulcate (left) and sulcate (right) views. Gray bar = 3 mm. (Photograph by Paul Smith).