Cryptophagus jakowlewi REITTER , 1888
Finnland: Tb: Jyväskylä, Ylistönrinne, 3.10.2001, leg. Jaakko Mattila [cMA, cES]; Ta: Kuhmoinen,
30.05.1974, 14.07.1983, 11.10.1987, leg. Eero Helve [cHE, cES]; Lkem: Sodankylä, 05.07.1989, leg. Eero Helve [cHE, cES].
Sweden: LyL, Gravsjön, 19.VI.-28.VII.1998, leg. Per Löfgren [cLU], Arby (Vassmolösa, Kalmar), leg. Geijer [cGE].
Cryptophagus jakowlewi REITTER, 1888 is quite similar to Cryptophagus archangelicus J. R. SAHLBERG, 1926 (9, 12, 18) and C. corticinus THOMSON, 1867 (fig. 8, 10). Most specimens of Cryptophagus jakowlewi have both a dark head and pronotum (fig. 7). Males of C. jakowlewi are easily distinguishable by its parameres (fig. 11). But a few specimens are paler and more similar to C. corticinus.
C. bidentatus MÄKLIN, 1853 (fig. 3, 14) and C. confertus CASEY, 1900 (fig. 5, 13) are often also very similar but have different parameres. They resemble to C. quadridentatus MANNERHEIM, 1843 and C. dentatus (HERBST, 1793)
C. reflexus REY, 1889 and C. scanicus (LINNAEUS, 1758) are well-defined species.