Population frequency of the hemipenes features through distribution of Xenopholis scalaris, considering its disjunct set of populations at Amazonia and Atlantic forest.
Graphs referring to the hemipenian variability of X. scalaris. For the population of the Atlantic Forest, 71.43% presented capitulum smaller than hemipenial body (blue) and 28.57% capitulum as long as the hemipenial body (orange) (100% of Amazonian hemipenis have capitulum equivalent to hemipenial body). Digital elevation model (DEM—GTOPO30) source: U.S. Geological Survey’s EROS Data Center in Sioux Falls, South Dakota. U.S. Geological Survey’s Center for Earth Resources Observation and Science (EROS) (open source).