Fig. 14. A in New Taxa And Cryptic Species Of Neotropical Snakes (Xenodontinae), With Commentary On Hemipenes As Generic And Specific Characters

Fig. 14. A. Echinanthera undulata (Wied). Vivid pale nuchal spots—similar to Eutrachelophis spp.— characterize some xenodontine (and dipsadine) snakes such as this Brazilian snake (AMNH R-119764). B. Taeniophallus bilineatus (Fischer). A distinct lateral line of whitish dashes emphasized by black edging characterize Eutrachelophis spp. and other xenodontines (and dipsadines) such as this Brazilian species (AMNH R-119769); the pale canthal line seen here is variably present in ''xenodontines,'' but does not occur in Eutrachelophis (photographs by C.W. Myers).