Donkey
Donkeys can interbreed with other members of the family Equidae, and are commonly interbred with horses. The hybrid between a jack and a mare is a mule, valued as a working and riding animal in many countries. Some large donkey breeds such as the Asino di Martina Franca, the Baudet de Poitou and the Mammoth Jack are raised only for mule production. The hybrid between a stallion and a jenny is a hinny, and is less common. Like other inter-species hybrids, mules and hinnies are usually sterile. Donkeys can also breed with zebras in which the offspring is called a zonkey (among other names).
Ecnomidae
The Ecnomidae taxonomy has been problematic, Ecnomidae was first described (Ulmer 1903) as a subfamily of Hydropsychidae, and later as a subfamily within Psychomiidae. The family Ecnomidae is now accepted as monophyletic beside its sister-group Polycentropodidae. The Ecnomidae contain at least 9 genera with the most diversity found in the genus "Ecnomus". Currently, a total of 375 species are described. In recent years, several new species has been discovered, mainly from the Oceania region. Other phylogenetically distinct genera exist which have not been scientifically described yet.All Ecnomidae genera are restricted to the Southern Hemisphere except the genus "Ecnomus", which is widely distributed. This means the group of may have a Gondwanan origin.