Systematic and biogeographical study of Protura (Hexapoda) in Russian Far East: new data on high endemism of the group Author Bu, Yun Author Potapov, Mikhail B. Author Yin, Wen Ying text ZooKeys 2014 424 19 57 http://dx.doi.org/10.3897/zookeys.424.7388 journal article http://dx.doi.org/10.3897/zookeys.424.7388 1313-2970-424-19 38EAC4B788344054B9AC9747AC476543 Taxon classification Animalia Protura Acerentomidae Genus Yichunentulus Yin, 1980 new to RFE Yichunentulus Yin, 1980: 146-147, 155. Type species. Yichunentulus yichunensis Yin, 1980. Diagnosis. Mesonotum and metanotum each with two pairs of anterior setae, abdominal appendages II and III each with two setae, labial palpus with one-branched terminal tuft of setae, with 3 setae and 1 sensillum, foretarsal sensillum t1 baculiform, sensillum b' absent or present, sensillum a' located distal to t1, maxillary gland simple and without appendages, sternite VIII with 4/2 setae, striate band on abdominal segment VIII reduced, and sternites II-VI each has 1+1 membranal pores. Remarks. The genus Yichunentulus Yin, 1980 has only one species described from Heilongjiang, Northeast China ( Yin 1980 ). After compare Baculentulus borealis Nakamura, 2004 with congeners, we find two important characters of this species: presence of one-branched terminal tuft of setae and 3 seate on labial palpus and 4/2 setae on sternite VIII are different to any other species of the genus Baculentulus . On the contrary, those two characters match well with genus Yichunentulus . Two specimens of Baculentulus borealis newly collected from type locality are also studied. We proposed to transfer Baculentulus borealis to the genus Yichunentulus as a new combination Yichunentulus borealis (Nakamura, 2004), comb. n. The three species of the genus Yichunentulus can be distinguished by the following key. Key to species of genus Yichunentulus Yin, 1980

Yichunentulus borealis
b	Yichunentulus yichunensis
b	Yichunentulus alpatovi