non1840 Goniatites acutus.-Münster, p.110, pl.16 fig.11.
1851 Goniatites retrorsus var. acutus.-Sandberger & Sandberger, p.108, pl.10 fig.10, pl.10a fig.1-2.
1851 Goniatites retrorsus var. acutus.-Sandberger, p.551, pl.10 fig.10.
non1887 Goniatites acutus.-de Rouville, p.43, pl.7 fig.1,1a (=Ch.(Ray.) verneuili).
1897 Tornoceras acutum.-Foord & Crick, p.101-102, textfig.45(C4611).
1908 Cheiloceras (?) acutum.-Wedekind: 585, pl.39 fig.3,4.
1913 Cheiloceras acutum.-Frech, p.29.
1914 Oma-monomeroceras (Cheiloceras) praelentiforme Sobolev, p.34, pl.2 fig.7,8, textfig.17.
?pt.1929 ?Cheiloceras acutum.-Lange, p.13,36(pt.=Par. acutum).
1931b Cheiloceras (Cheiloceras) acutum.-Matern, p.34-35.
1936 Tornoceras retrorsum var. acutum.-Termier.
non1936b Cheiloceras praelentiforme.-Nalivkina, p.12, pl.2 fig.1,2(pt.=Ch.(Ch.)subp. cf. artum,pt.=Ch.sp.).
1936 Cheiloceras (Cheiloceras acutum.-Paeckelmann, p.27.
1951 Cheiloceras acutum.-Petter, p.357.
1952 Cheiloceras acutum.-Petter, p.67.
pt. 1959 Tornoceras (?) acutum.-Petter, pl.15 fig.2.
1966 Cheiloceras (Cheiloceras) acutum.-Jenkins, p.459-462, pl.72 fig.4-6.
non1971 Cheiloceras (Cheiloceras) praelentiforme.-Bogoslovsky, p.112-113, pl.6 fig.12-13(Ch.(Ch.)subp. cf. artum).
non1971 Cheiloceras (Cheiloceras) acutum.-Bogoslovsky, p.115-116, pl.6 fig.6, pl.7 fig.1(=Ch.(Ch.) bogoslovskyi), textfig.33b.
1974 Cheiloceras (Staffites) lagowiense.-Jux & Krath: 152, textfig.10, 11d, pl.19 fig.9.
cf. 1978 Cheiloceras aff. acutum.-Clausen in Bouckaert et al.: 117, pl.1 fig.1 (there det.cf.acutum).
? 1980 Cheiloceras acutum.-Kochetkova et al., p.35.
1984 Cheiloceras (Compactoceras) acutum.-Becker, p.102, textfig.16g.
1984 Cheiloceras praelentiforme.-Yatskov, p.133.
1993 Cheiloceras (Raymondiceras) praelentiforme.-Becker: 263, pl.17 fig.1-6, pl.18 fig.1-2, textfig.84g,87e-g.
2002 Nehdenites praelentiformis.-Korn & Klug: 174, Fig.155 C.