TreeSearch is an R package for phylogenetic analysis, optimized discrete character data. Tree search may be conducted using equal or implied step weights with explicit (albeit inexact) allowance inapplicable entries, avoiding some of the pitfalls inherent in standard parsimony methods. Profile and user-specified optimality criteria are supported. A graphical interface, which requires no familia...

The axolotl has extraordinary regeneration capacity compared to other vertebrates. This remarkable potential been attributed its life-long neoteny, characterized by the exhibition of embryonic characteristics at adult stage. A recent study provided a detailed morphological analysis sperm morphology Ambystoma mexicanum using routine and histological techniques. primary purpose present is describ...