Hydraena steineri

Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 57

Steineri Complex

Two species comprise the Steineri Complex: H. steineri , and H. concepcionica . These are medium sized species (ca. 1.49–1.52 mm), which have coarse and dense dorsal punctation, lack a pronotal scintilla, and have similarly shaped metaventral plaques ( Figs. 118–119 ). The male genitalia in this complex are comparatively simplified, rather wide in lateral aspect, the main piece with a more or less developed, raised ridge on the ventral surface, and the gonopore is located at the end of a long flexible flagellum ( Figs. 120–121). The currently known species are from Bolivia ( H. steineri ) and Paraguay ( H. concepcionica ).

Figures

FIGURE 118. Hydraena steineri, holotype, dorsal and lateral habitus, and venter.

FIGURE 119. Hydraena concepcionica, holotype, dorsal and lateral habitus, and venter.