Cylloepus dimorphus Shepard, Sites, and Rodrigues, new species (Elmidae) is described from Brazil with a sexually dimorphic abdominal ventrite 5. Males have a protruding lobe on each side of the apex of ventrite 5. Females lack the lobes and are not distinguishable from congeners.
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20 March 2021
A New, Sexually Dimorphic Species of Cylloepus Erichson from Brazil (Coleoptera: Elmidae)
William D. Shepard,
Robert W. Sites,
Higor D. D. Rodrigues
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The Coleopterists Bulletin
Vol. 75 • No. 1
March 2021
Vol. 75 • No. 1
March 2021
Byrrhoidea
neotropical
riffle beetle
taxonomy