Speciation occurs in a specific characteristic and predictable manner in all species

No uts randomly as it depends on mutation, and variation due to natural ways as purposed by Charles Darwin and Larmark such as survival for the fittest and natural selection and other mode let's say the dying and lost of short necked giraffe also vestigial structures

This statement is false. It is often not possible for speciation to be predicated as speciation of species depends on its habitat and interaction with other organisms in the habitat as well as the ever-changing environmental factors. It is thus very hard to model possible speciation that could happen.