Figure 14. SEM images of shell morphology of 1-day-old hatchlings of Pomacea maculata (Houston, Texas, USA; A, C, E) and Pomacea canaliculata (Tucumán, Argentina; B, D, F). A, B, apertural view. C, D, apex view. E, F, close-up of embryonic whorl. Scale bars: 100 Mm.