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--- history:evolution [2026/04/29 00:01] – [Proterozoic eon (2500 - 540 mya)] gary1
+++ history:evolution [2026/04/29 00:10] (current) – [Proterozoic eon (2500 - 540 mya)] gary1
@@ Line 247: / Line 247: @@
                               * other crustaceans
                               * decapoda
-                                * other decapoda (**prawns, shrimps, lobsters**)
+                                * endrobranchiata (**prawns**)
-                                * brachyura (**true crabs**) - their unique sideways walking evolved as a single event ~200mya when shallow marine environments developed
+                                * pleocyemata
-                                * anomura (other crabs such as hermit crabs)
+                                  * caridea ("true" **shrimp**)
+                                  * reptantia (crawling, walking decapods)
+                                    *lobster ancestor
+                                      * achelata (spiny lobsters and slipper lobsters)
+                                      *astacidea (**lobsters and crayfish**)
+                                    *axiidea (mud shrimp, ghost shrimp, and burrowing shrimp)
+                                    *gebiidea (mud lobsters and mud shrimp
+                                    *crabs
+                                      * brachyura (**true crabs**) - their unique sideways walking evolved as a single event ~200mya when shallow marine environments developed
+                                      * anomura (other crabs such as hermit crabs)
                       * **Insecta** / Hexapods (insects; 400mya)
                         * rapid diversification of flying insects 299-251mya