Subgenus Baeckmanniolus Reichardt, 1926

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Type species Hister dimidiatus Illiger, 1807, original designation.

Baeckmanniolus Reichardt, 1926: 14 Baeckmanniolus: PEYERIMHOFF (1936): 225; REICHARDT (1941): 157, 222; WENZEL (1962):374, 380; HALSTEAD (1963): 9; DAHLGREN (1969): 66; WITZGALL (1971): 165, 1974; KRYZHANOVSKIJ & REICHARDT (1976): 219, 229; VIENNA (1980): 115, 193; MAZUR & KASZAB (1980): 60; MAZUR (1981a): 99, 104; MAZUR (1984): 99; ÔHARA (1994): 243, 258; KIM & LIM (1997): 60; ÔHARA & PAIK (1998): 29; BOUSQUET & LAPLANTE (1999): 141, 172; MAZUR (2001): 19, 34; YÉLAMOS (2002): 326, 336; MAZUR (2004): 94; BOUSQUET & LAPLANTE (2006): 81, 196.

Diagnosis. Species of this subgenus differ from those of the subgenus Hypocaccus chiefly by the almost completely smooth pronotum; occasionally there is fine punctation in the anterior angles.

BOUSQUET & LAPLANTE (2006: 196) state that metatibia is on the outer-lateral margin with at least three rows of denticles, as opposed to two that are present in the subgenus Hypocaccus . However, this character must be verified by further studies based on more material.

Biology and Distribution. Typical littoral taxon, with 13 species and 3 subspecies distributed worldwide on beaches (MAZUR 1997). Absent in the interior.

Species examined. Hypocaccus (Baeckmanniolus) dimidiatus dimidiatus (Illiger, 1807), H. (B.) dimidiatus maritimus (Stephens, 1830), H. (B.) varians varians (Schmidt, 1890) .