Kingdom Animalia Class Insecta Family Micronoctuidae Scientific name Tactusa brevis | Phylum Arthropoda Order Lepidoptera Genus Tactusa Rank Species | |
Tactusa brevis is a moth of the Micronoctuidae family. It is known from Yunnan and Guizhou in China.
The wingspan is 11–12 mm. The forewings are narrow. The head, patagia and base of the costa are black and the ground colour of the forewings is brown, with a dark brown costal-medial patch, and with a dark brown subterminal and terminal area, including fringes. The cross-lines are black and the subterminal line is broad and the terminal line is marked by black interveinial dots. The reniform stigma is beige-yellow, outlined by black. The hindwings are unicolourous grey, with a discal spot. The fringes are grey. The ventral surface is unicolourous light brown.
The biotope consists of a moist, mainly broad-leaf forest, with bushes and herbaceous plants, close to a river. The Mojiang collecting site is a large ravine, with a brook. All specimens were collected at light in mid-September.