Task: Text Simplification
Input (English): all members of this genus were once considered part of the same species , calomyscus bailwardi , but they are now referred to as separate species due to major differences in chromosome number , skull measurements , and other features.
Output (English): all members of this -lrb- related group of living things -rrb- were once considered part of the same species , calomyscus bailwardi , but they are now referred to as separate species due to major differences in -lrb- genetic information storage area -rrb- number , skull measurements , and other features.