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. 2021 Nov 29:1073:55-117.
doi: 10.3897/zookeys.1073.71843. eCollection 2021.

A review of the Larainae of Australia with description of seven new species and the new genus Australara (Coleoptera, Byrrhoidea, Elmidae)

Cheryl B Barr  1 , William D Shepard  1
Affiliations

A review of the Larainae of Australia with description of seven new species and the new genus Australara (Coleoptera, Byrrhoidea, Elmidae)

Cheryl B Barr et al. Zookeys. .

Abstract

The three genera and four species of Larainae (Elmidae) previously described from Australia are reviewed, and one new genus and seven new species are described: Australaraglaisteri gen. et sp. nov., Ovolaralawrencei sp. nov., Ovolaramonteithi sp. nov., Stetholuscarinatus sp. nov., Stetholuslongipennis sp. nov., Stetholusmetatibialis sp. nov., and Stetholusworonora sp. nov. A lectotype is designated for Hydoralaticeps (Carter & Zeck), and the first new collection records of the species are reported since its description in 1932. The occurrence in Australia of Potamophilinuspapuanus Satô, described from Papua New Guinea, is reported. A key to the species, photographic images of the external morphology and male genitalia, distribution maps, and habitat and behavioral information, when known, are provided for all twelve species of Australian Larainae.

Keywords: Hydora; Ovolara; Potamophilinus; Stetholus; aquatic beetles; new taxa; riffle beetles; taxonomy.

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Figures

Figures 1–12.
Figures 1–12.
Geographical distribution of species records 1Australaraglaisteri gen. nov., sp. nov. 2Hydoralaticeps3Ovolaraaustralis4Ovolaralawrencei sp. nov. 5Ovolaraleai6Ovolaramonteithi sp. nov. 7Potamophilinuspapuanus8Stetholuscarinatus sp. nov. 9Stetholuselongatus10Stetholuslongipennis sp. nov. 11Stetholusmetatibialis sp. nov.12Stetholusworonora sp. nov.
Figures 13, 14.
Figures 13, 14.
Australaraglaisteri gen. nov., sp. nov., male 13 habitus A dorsal B ventral (photographs courtesy of the Australian National Insect Collection, CSIRO, Zhenhua Liu) 14 male genitalia A dorsal view B lateral view C ventral view.
Figure 15.
Figure 15.
Hydoralaticeps, lectotype male A specimen labels B dorsal habitus C ventral head and prosternum D lateral head and pronotum (photographs courtesy of the Australian Museum, Natalie Tees).
Figure 16.
Figure 16.
Hydoralaticeps, lectotype; male genitalia A dorsal view B lateral view C ventral view.
Figures 17–19.
Figures 17–19.
Hydoralaticeps, paralectotype males; dorsal habitus with specimen labels 17>AM specimen (photograph courtesy of the Australian Museum, Natalie Tees) 18ANIC specimen (photograph courtesy of Vít Sýkora, Charles University, Prague, Czech Republic) 19ANIC specimen (photograph courtesy of the Australian National Insect Collection, CSIRO).
Figures 20, 21.
Figures 20, 21.
Hydoralaticeps, non-types from Lyneham, ACT20 female habitus, 4.5 mm long A dorsal B ventral 21 male genitalia A dorsal view B lateral view C ventral view.
Figure 22.
Figure 22.
Hydoralaticeps, non-type female from Cann River, VICA dorsal habitus B ventral habitus C lateral habitus (photographs courtesy of the Queensland Museum, Geoff Thompson).
Figures 23, 24.
Figures 23, 24.
Ovolaraaustralis, male 23 habitus, 4.1 mm long A dorsal B ventral 24 male genitalia A dorsal view B lateral view C ventral view.
Figures 25, 26.
Figures 25, 26.
Ovolaralawrencei sp. nov., male 25 habitus, 3.0 mm long A dorsal B ventral 26 male genitalia A dorsal view B lateral view C ventral view.
Figure 27.
Figure 27.
Ovolaralawrencei sp. nov., type locality, and Stetholuslongipennis sp. nov., collection locality: Emerald Creek, east of Mareeba, QLD, Australia (photograph courtesy of David Rentz, James Cook University, Smithfield, QLD).
Figures 28, 29.
Figures 28, 29.
Ovolaraleai, male 28 habitus, 3.4 mm long A dorsal B ventral 29 male genitalia A dorsal view B lateral view C ventral view.
Figures 30, 31.
Figures 30, 31.
Ovolaramonteithi sp. nov. 30 female habitus, 3.6 mm long A dorsal B ventral 31 male genitalia A dorsal view B lateral view C ventral view.
Figures 32, 33.
Figures 32, 33.
Potamophilinuspapuanus, male 32 habitus, 4.6 mm long A dorsal B ventral 33 male genitalia A dorsal view B lateral view C ventral view.
Figures 34, 35.
Figures 34, 35.
Stetholuscarinatus sp. nov., holotype male 34 habitus, 3.7 mm long A dorsal B ventral 35 male genitalia A dorsal view B lateral view C ventral view.
Figures 36, 37.
Figures 36, 37.
Stetholuselongatus36 female habitus, 5.2 mm long A dorsal B ventral 37 male genitalia A dorsal view B lateral view C ventral view.
Figures 38, 39.
Figures 38, 39.
Stetholuslongipennis sp. nov., male 38 habitus, 4.2 mm long A dorsal B ventral 39 male genitalia A dorsal view B lateral view C ventral view.
Figure 40.
Figure 40.
Stetholusmetatibialis sp. nov., holotype female, 3.9 mm long A dorsal habitus B ventral habitus C head, frontal view D head, ventral view.
Figures 41, 42.
Figures 41, 42.
Stetholusworonora sp. nov., holotype male 41 habitus, 5.2 mm long A dorsal B ventral 42 male genitalia A dorsal view B lateral view C ventral view.
Figure 43.
Figure 43.
Stetholusworonora sp. nov., type locality: Woronora River, north of Engadine, NSW, Australia (photograph courtesy of Martin Fikáček, National Museum, Prague, Czech Republic).
See this image and copyright information in PMC

References

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