Complex sentence: A toilet-claw is an anatomical structure found in all prosimians, which include the Tarsiers of the infraorder Tarsiiformes (from the suborder Haplorrhini) and the entire suborder Strepsirrhini, which includes lemurs, galagos and lorises.
Split into simpler sentences: A toilet-claw is an anatomical structure found in certain primates. It is found in all prosimians, which include the Tarsiers of the infraorder Tarsiiformes (from the suborder Haplorrhini) and the entire suborder Strepsirrhini, which includes lemurs, galagos and lorises.