Fig. 16 in New Taxa And Cryptic Species Of Neotropical Snakes (Xenodontinae), With Commentary On Hemipenes As Generic And Specific Characters

Fig. 16. Everted hemipenis of Mehelya poensis (Smith). (AMNH R-12053, left organ.) This is a slight, deeply forked hemipenis with long slender lobes and a very long retractor muscle that originates close to the tail tip. This organ divides at subcaudal 4, with the lobes terminating at about subcaudal 21 (an indistinct join between lobe and retractor); the two slips of retractor muscle fuse at subcaudal 29, but the long muscle continues posteriorly to a broad attachment between caudals 46–49, only 10 subcaudals before the terminal caudal spine.