Hydraena fasciola

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 : 38-39

Fasciola Complex

Six species comprise the Fasciola Complex: H. fasciola , H. mauriciogarciai , H. pedroaguilerai , H. shorti , H. limpidicollis , and H. newtoni ( Figs. 62–63 , 67–69 ). These are very small (ca. 1.01–1.25 mm), colorful species that often have a testaceous fascia or macula on the elytra. The coxae are rather widely separated by P1 and P2, and the plaques narrow and widely separated. The male genitalia are quite simple, and have a basic plan similarity, generally with the main-piece sinuate in ventral view, and with a similar basal ring shape; characteristically, the gonopore is located at the end of a slender, rigid process ( Figs. 65–66, 71–72).

The last tergite of (known) females have long, non-hooked setae. H. shorti ( Fig. 68 ) differs in color from the other species in this complex, having a distinctive pronotal fascia; all other members have a testaceous pronotum. Members of the complex are currently known from Panama, Venezuela , and Ecuador. The species H. limpidicollis and H. newtoni have male genitalia rather divergent from the other species, and are therefore quite tentatively placed here.

Figures

FIGURE 62. Hydraena fasciola, holotype, dorsal and lateral habitus, and venter.

FIGURE 63. Hydraena mauriciogarciai, holotype, dorsal and lateral habitus, and venter.

FIGURE 67. Hydraena pedroaguilerai, holotype, dorsal and lateral habitus, and venter.

FIGURE 68. Hydraena shorti, holotype, dorsal and lateral habitus, and venter.

FIGURE 69. Hydraena limpidicollis, non-type from Venezuela, dorsal and lateral habitus, and venter.