List of the studied authors
Brodsky, 1950 (1967) (p.277, figs.F, non M); Vervoort, 1957 (p.96, Rem.); Tanaka, 1960 a (p.134, figs.F,M); Grice & Hulsemann, 1970 (p.196, Rem.); Vaupel-Klein, 1970 (p.31); Bradford & al., 1983 (p.127); Chihara & Omori, 1997 (p.920, Pl.183,184: F,M); Andronov, 2002 (p.66, figs.F,M)