William D. Shepard, Robert W. Sites & Higor D. D. Rodrigues (2021) A New, Sexually Dimorphic Species of Cylloepus Erichson from Brazil (Coleoptera: Elmidae). The Coleopterists Bulletin, 75(1): 270-274.

Cheryl B. Barr (2021) Revision of Macrelmis Motschulsky, 1860 in the Southwestern United States and Northern Mexico with Description of Four New Species (Coleoptera: Elmidae: Elminae). The Coleopterists Bulletin, 75(1): 93-120.

Kohei Watanabe (2021) Biology of the Small Diving Beetle Laccophilus yoshitomii Watanabe and Kamite, 2018 (Coleoptera: Dytiscidae) and Rearing Methods. The Coleopterists Bulletin, 75(1): 88-92. 飼育状況についても触れている。本種は餌の動き…

Keita Matsumoto (2021) A New Species of Byrrhinus Motschulsky (Coleoptera: Limnichidae) from Côte D'Ivoire. The Coleopterists Bulletin, 75(1): 56-58.

K. Hashimoto & D. Suzuki (2021) Environmental Factors Predicting Dispersal Mode of the Wing-Dimorphic Psammophilous Beetle Mecynotarsus niponicus Lewis, 1895 (Coleoptera: Anthicidae) in a Sandy Floodplain: An Exploratory Analysis. The Cole…