List of the studied authors
Sewell, 1948 (p.330, 530, 540); Grice & Hulsemann, 1967 (p.18); Guangshan & Honglin, 1984 (p.118, tab., Rem.: p.165); Matsuura & al., 2010 (p.2098, Table 2, 3); Pillai H.U.K. & al., 2011 (p.239, Table 3, vertical distribution)