Hydraena Kugelann, 1794

PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 6

publication ID

http://dx.doi.org/10.11646/zootaxa.3758.1.1

publication LSID

lsid:zoobank.org:pub:63F695AA-891F-48D2-AE96-7492016B9590

DOI

http://doi.org/10.5281/zenodo.5037601

persistent identifier

http://treatment.plazi.org/id/E654878A-6703-041F-F2EE-B157FBFAFA3B

treatment provided by

Felipe

scientific name

Hydraena Kugelann, 1794
status

 

Hydraena Kugelann, 1794  

Hydraena Kugelann, 1794: 578   (type species Hydraena riparia Kugelann 1794: 579   ).

The speciose, cosmopolitan genus Hydraena   is well defined by the following autapomorphic morphological characteristics: 1) presence of a labral-mandibular interlocking device (Perkins 1989), 2) mentum with an acute median projection anteriorly (Perkins 1989), 3) various complex sensilla ( Perkins 1997), and 4) specialized features of the exocrine secretion delivery system ( Perkins 1997). There is general agreement among current workers that Hydraena   is monophyletic, based on these morphological characters (for example, Jäch et al. 2000).

In a recently published landmark paper ( Trizzino et al. 2013) the phylogeny of Hydraena   was reconstructed using 212 species plus several outgroups and approximately 4 kb of sequence data from two nuclear (SSU and LSU) and four mitochondrial genes (cox1, rrnL, trnL and nad1). The study found strong support for the monophyly of Hydraena   and many of the clades that have been recognized on the basis of morphological data. The following clades were considered by Trizzino et al. (2013) as subgenera: Phothydraena Kuwert   , Spanglerina Perkins   , Holcohydraena Kuwert   , Hydraenopsis   Janssens and Hydraena   s.str. The placement of three species groups, two Neotropical ( H. multispina   group, H. paeminosa   group) and one South African/Madagascan ( H. monikae   group), was found to be uncertain, and they were considered incertae sedis within Hydraena   .

The study by Trizzino et al. included four southern African species of Hydraena   . Two of the species, H. accurata   and H. cooperi   were found to be members of the subgenus Hydraenopsis   . Two other species that were sequenced, represented by one specimen each, were H. monikae   and H. sp.; these were determined to be in the same, subgenerically uncertain, clade (= H. monikae   group). The second species (" H. sp.") is a member of H. duodecimata   .

Based on morphological similarity, five species are herein placed in the Monikae Group. The 24 other species are quite similar in basic morphology to H. accurata   and H. cooperi   , and are consequently placed in the subgenus Hydraenopsis   . More DNA sequence studies are needed to corroborate these placements.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Hydraenidae

Loc

Hydraena Kugelann, 1794

PERKINS, PHILIP D. 2014
2014
Loc

Hydraena

Kugelann 1794: 578
1794
Loc

Hydraena riparia

Kugelann 1794: 579
1794