Revision of the genus Epimesoplecia Zhang, 2007 (Diptera, Nematocera, Protopleciidae) with five new species

The genus Epimesoplecia Zhang, 2007 of Protopleciidae is revised based on five new species, Epimesopleciaplethora sp. n., Epimesopleciaprosoneura sp. n., Epimesopleciastana sp. n., Epimesopleciamacrostrena sp. n., and Epimesopleciaambloneura sp. n., described and illustrated from the Jiulongshan Formation of China. These new species, with clearly preserved characters of (1) compound eyes connected in males; (2) antennae, filiform or moniliform, with 16 segments; (3) r-m reaching the middle of the wing; (4) R4+5 ending very close to wing apex; (5) ratio of bRs/dRs ranging from 1.6 to 10.5; (6) M2 more than 3 times as long as dM1+2; (7) legs thin and long, femur slender, almost equal to tibia; (8) tibial spurs minute; and (9) male genitalia (previously unknown), enable us to emend the diagnosis of Epimesoplecia Zhang, 2007. In addition, all described species of Epimesoplecia are characterized, their features summarized, and a key to Epimesoplecia species is given.