Hyphydrini

Desmopachria convexa, photographed by Donald S. Chandler.

Belongs within: Hydroporinae.

The Hyphydrini is a clade of water beetles whose members lack posteromedial lobes on the metacoxae, and have the metatarsal claws unequal in length in both sexes, with the posterior claw shorter than the anterior (Miller 2001). Some authors have divided this group between the Hyphydrini sensu stricto, with an apically narrow, acute prosternal process, and the Pachydrini, in which the prosternal process is apically broad and truncate, but the latter was nested within the former by the analysis of Miller (2001). Members of Pachydrini and the genus Desmopachria share fusion of the metacoxae with the first abdominal ventrite.

<==Hyphydrini
    |--Hyphydrus Illiger 1807 M01, LM87
    |    |--*H. gibbus (Fabricius 1777) [=Hydrachna gibba] LM87
    |    |--H. aubei M01
    |    |--H. contiguus Wehncke 1877 LM87
    |    |--H. decemmaculatus Wehncke 1877 [incl. H. curvipes Régimbart 1891 LM87
    |    |--H. effeminatus Watts 1978 LM87
    |    |--H. elegans (Montrouzier 1860) (see below for synonymy) LM87
    |    |--H. ferrugineus [incl. H. ferrugineus ab. variegatus] C01
    |    |--H. japonicus M01
    |    |--H. lyratus Swartz 1808 (see below for synonymy) LM87
    |    `--H. ovatus M01
    `--+--Pachydrini M01
       |    |--Pachydrus obesus M01, R89
       |    `--Heterhydrus sudanensis M01
       `--Desmopachria M01
            |--D. dispersa M01
            `--+--D. bifasciata M01
               |--D. challeti M01
               |--D. convexa M01
               |--D. mendozana M01
               |--D. ovalis M01
               |--D. striola M01
               |--D. volatidisca M01
               `--D. youngi M01

Hyphydrus elegans (Montrouzier 1860) [=Pachytes elegans; incl. Hyp. australis Clark 1862, Hydroporus bifasciatus Macleay 1871, Hyp. blanchardii Clark 1862, Hyp. caledoniae Clark 1862, Hyp. gibbicollis Régimbart 1891, Hyp. illigeri Perroud & Montrouzier 1864, Hydroporus nitidicornis Broun 1880] LM87

Hyphydrus lyratus Swartz 1808 [incl. H. bisulcatus Clark 1863, H. fossulipennis Macleay 1871, H. nigronotatus Clark 1863] LM87

*Type species of generic name indicated

REFERENCES

[C01] Csiki, E. 1901. Bogarak [Coleopteren]. In: Horváth, G. (ed.) Zichy Jenő Gróf Harmadik Ázsiai Utazása [Dritte Asiatische Forschungsreise des Grafen Eugen Zichy] vol. 2. Zichy Jenő Gróf Harmadik Ázsiai Utazásának Állattani Eredményei [Zoologische Ergebnisse der Dritten Asiatischen Forschungsreise des Grafen Eugen Zichy] pp. 75–120. Victor Hornyánszky: Budapest, and Karl W. Hierseman: Leipzig.

[LM87] Lawrence, J. F., B. P. Moore, J. E. Pyke & T. A. Weir. 1987. Zoological Catalogue of Australia vol. 4. Coleoptera: Archostemata, Myxophaga and Adephaga. Australian Government Publishing Service: Canberra.

[M01] Miller, K. B. 2001. On the phylogeny of the Dytiscidae (Insecta: Coleoptera) with emphasis on the morphology of the female reproductive system. Insect Systematics and Evolution 32: 45–92.

[R89] Régimbart, M. 1889. Enumération des Haliplidae, Dytiscidae et Gyrinidae recueillis par M.^r le Prof. L. Balzan dans l’Amérique méridionale et description de quelques autres espèces voisines. Annali del Museo Civico di Storia Naturale di Genova, Serie 2a, 7: 256–268.

Last updated: 30 January 2018.