Mini Sheet is square format.Although this edition was authorized by the Niger postal administration, it was not sold in Niger, but only distributed to the novelty trade by the Nigerian philatelic agency.
Also in the issue Dinosaurs (2018.1):
Data entry completed
|Mini Sheet Flying Dinosaurs in digits|
|Face Value:||4*800 West African CFA franc|
Mini Sheet Flying Dinosaurs it reflects the thematic directions:
For more information about Flying Dinosaurs, you can search for GOOGLE