Apart from two partial specimens (#2 and 3) recovered from sperm whale stomachs in the mid-1950s—initially misidentified as belonging to the giant squid genus, Architeuthis (Sweeney & Roper, 2001:[56]; see Korabelnikov, 1959)—and a single juvenile individual of 86 mm mantle length (#4; McSweeny, 1970), little else was known about the species until additional specimens began receiving coverage in Russian-language scientific journals in the 1970s (Dery, 2013; see e.g. Yukhov, 1974; Klumov & Yukhov, 1975).