Post-embryonic tail development through molting of the freshwater shrimp Neocaridina denticulata.

Neocaridina, a crustacean, exhibits distinctive tail morphogenesis during molting, making it a potential model for post-embryonic morphogenesis. After the first molting, two significant changes occur in the tail: the uropod branches are cleared and the telson undergoes convergent elongation. Cross-sectional analysis showed that uropod and telson branching begins immediately after hatching as cuticle branching. The surface structure of the developing tail suggested that telson elongation is achieved through anisotropic cuticle furrow extension during molting, linked to epithelial cell shape changes occurring post-hatching. An in vivo live imaging system with UV-LED resin revealed gradual telson contraction before molting. Additionally, a draft genome of Neocaridina denticulata was provided. This research enhances understanding of arthropod morphogenesis through molting and lays groundwork for further developmental and cytological studies in Neocaridina.