Igala is closely related to both Yoruba and Itsekiri languages.All Yoruboid languages are tonal, with most of them having three level tones.. 
The ordovician (gbáàtọrọ ) is a geologic period and system, the second of six of the palẹ̀OzÌlérí era, and covers the time between 488.3+1.7.7 to 443.7–1.5 million years ago .. 