Hydraena curvosa

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 : 19

publication ID

https://doi.org/ 10.5281/zenodo.1050060

DOI

https://doi.org/10.5281/zenodo.6184416

persistent identifier

https://treatment.plazi.org/id/C063786A-FFBC-FFEF-FF0D-13745E54914E

treatment provided by

Plazi

scientific name

Hydraena curvosa
status

 

Curvosa View in CoL Group

The Curvosa Group comprises three species: H. curvosa ( Brazil, Peru ), H. takutu ( Guyana) , and H. hintoni ( Brazil) . These are rather convex species, moderately sized (ca. 1.48–1.76 mm), with a characteristic habitus ( Figs. 16– 18 View FIGURE 16 View FIGURE 17 View FIGURE 18 ). The coxae are rather widely separated by P1 and especially P2, and the plaques are also widely separated. The genae usually have an ill-defined posterior ridge laterally. The male genitalia are quite stout, and have a basic plan similarity; the parameres are moderately large, and the right paramere has modified setae ( Figs. 15, 19, 20). The female gonocoxite is "divided", having a weakly sclerotized midlongitudinal area, and is similarly shaped in all species in this group (e.g., Fig. 149 View FIGURES 148 – 150 ). The spermatheca ( Figs. 151–152 View FIGURES 151 – 154 ) is circular, somewhat disc-shaped, markedly differing from that of all American Hydraena , except members of the Paeminosa Group. Externally and male genitalically the two groups are very different.

Two of the species in this group, H. curvosa and H. takutu , so far have only been collected from leaf packs taken from streams.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Hydraenidae

Genus

Hydraena

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