Reedocalymene Kobayashi, 1951

Lee, Dong-Chan, 2013, Late Ordovician trilobites from the Xiazhen Formation in Zhuzhai, Jiangxi Province, China, Acta Palaeontologica Polonica 58 (4), pp. 855-882 : 876

Genus Reedocalymene Kobayashi, 1951

Type species: Reedocalymene unicornis ( Reed, 1917) , from the Middle Ordovician Shidian Formation of Yunnan, China .

cf. Reedocalymene sp.

Fig. 11R.

Material.—One pygidium (repository number NIGP−152079).

Discussion.—The pygidium is greatly similar to that of Reedocalymene expansa Yi, 1957 (see Peng et al. 2000: pl. 1: 1), but differs in lacking interpleural furrows posterior to cincture. Peng et al. (2000) noted the shorter (sag.) pygidial axis of Calymenesun (see Zhou et al. 1984: fig. 7e for Calymenesun tingi [ Sun, 1931]) as the sole difference from pygidium of Reedocalymene . The pygidia of both genera have interpleural furrows in the pleural field posterior to cincture which are absent in this species. The absence of associable cranidial materials renders this species left in open nomenclature.