Ecyrus dasycerus is a species of insect belonging to the family Cerambycidae, commonly known as longhorn beetles. It is characterized by its elongated body and long antennae, which can be as long as or even longer than its body. The species is known for its distinctive hairy appearance, with dense hair covering its body and legs. Ecyrus dasycerus is typically found in tropical and subtropical regions, where it feeds on plant material and plays a role in ecosystem dynamics.