Paroosternum Scott, 1913

Paroosternum Scott, 1913: 220 . Type species: P. degayanum Scott, 1913 (by original designation). Anchorosternum Jia, Wu, & Pu, 2001: 155, new synonym. Type species: A. sinensis Jia, Wu & Pu, 2001 (by original designation).

Taxonomic note. Anchorosternum is identical with Paroosternum in all external diagnostic characters: (i) antennal grooves not reaching lateral margin of the hypomeron; (ii) median portion of prosternum elevated, with lateral parts deeply excised [character unique for Paroosternum within the Megasternini]; (iii) preepisternal plate elongate oval; (iv) metaventrite without anterolateral ridge; (v) femoral lines complete, reaching anterolateral corner of metaventrite [not drawn in the original illustration, but mentioned in generic description]. In addition, the type species of Anchorosternum agrees with the previously described species of Paroosternum (see below). For all these reasons, we consider Anchorosternum as a junior subjective synonym of Paroosternum .