Congeneric Predaceous Diving Beetle Species Fail to Segregate in a Floodplain System: A Case of Amplified Sympatry

2017 ◽  
Vol 46 (3) ◽  
pp. 494-501 ◽  
Author(s):  
Courtney Holt McDaniel ◽  
Joseph V. McHugh ◽  
Darold P. Batzer
Keyword(s):  
Beetle Species ◽  
System A ◽  
Diving Beetle

scholarly journals Protein expression parallels thermal tolerance and ecologic changes in the diversification of a diving beetle species complex

Heredity ◽  
2015 ◽  
Vol 116 (1) ◽  
pp. 114-123 ◽  
Author(s):  
A Hidalgo-Galiana ◽  
M Monge ◽  
D G Biron ◽  
F Canals ◽  
I Ribera ◽  
...  
Keyword(s):  
Protein Expression ◽  
Thermal Tolerance ◽  
Species Complex ◽  
Beetle Species ◽  
Diving Beetle

Limbodessus skalei sp. nov., a new diving beetle species from the west Papuan Archipelago (Coleoptera: Dytiscidae, Bidessini)

Zootaxa ◽  
2020 ◽  
Vol 4763 (4) ◽  
pp. 587-592
Author(s):  
LARS HENDRICH ◽  
SURIANI SURBAKTI ◽  
MICHAEL BALKE
Keyword(s):  
New Guinea ◽  
The Other ◽  
Beetle Species ◽  
The West ◽  
West Papua ◽  
Diving Beetle

Here we describe Limbodessus skalei sp. nov. from the island of Waigeo, off the coast of West Papua. It can be easily distinguished from the nearby New Guinea mainland species as well as the other members of the genus by its small size and testaceous elytra with conspicuous darker broad basal and subapical patches. Altogether four Limbodessus species are now known from the New Guinea region. 

Tepuidessus grulai sp. nov. from Acopán Tepui in Venezuela (Coleoptera: Dytiscidae: Hydroporinae: Bidessini)

Zootaxa ◽  
2018 ◽  
Vol 4434 (3) ◽  
pp. 561 ◽  
Author(s):  
JAN KODADA ◽  
LARS HENDRICH ◽  
MICHAEL BALKE
Keyword(s):  
Beetle Species ◽  
Diving Beetle

We report the discovery of the second Bidessini diving beetle species from a Venezuelan table-top mountain (also referred to as "tepui"). Tepuidessus grulai sp. nov. from Acopán Tepui can easily be separated from Tepuidessus breweri Spangler, 1981, described from Roraima Tepui, about 140 km apart from Acopán Tepui, by its much broader habitus with distinct outline discontinuity between pronotum and elytra, well developed, long and deep basal striae on pronotum and elytra and by the unbordered apical abdominal ventrite. 

scholarly journals Male clasping ability, female polymorphism and sexual conflict: fine-scale elytral morphology as a sexually antagonistic adaptation in female diving beetles

2013 ◽  
Vol 10 (86) ◽  
pp. 20130409 ◽  
Author(s):  
Kristina Karlsson Green ◽  
Alexander Kovalev ◽  
Erik I. Svensson ◽  
Stanislav N. Gorb
Keyword(s):  
Sexual Conflict ◽  
Adhesive Force ◽  
Beetle Species ◽  
Female Polymorphism ◽  
Diving Beetles ◽  
Males And Females ◽  
Suction Cups ◽  
Female Morph ◽  
Diving Beetle ◽  
Sexually Antagonistic Coevolution

During sexual conflict, males and females are expected to evolve traits and behaviours with a sexually antagonistic function. Recently, sexually antagonistic coevolution was proposed to occur between male and female diving beetles (Dytiscidae). Male diving beetles possess numerous suction cups on their forelegs whereas females commonly have rough structures on their elytra. These rough structures have been suggested to obstruct adhesion from male suction cups during mating attempts. However, some diving beetle species are dimorphic, where one female morph has a rough elytra and the other has a smooth elytra. Here, we used biomechanics to study the adhesive performance of male suction cups on the female morphs in two diving beetle species: Dytiscus lapponicus and Graphoderus zonatus . We compared adhesion on the rough and the smooth female morphs to infer the function of the rough elytral modifications. We found that the adhesive force on the rough structures was much lower than on other surfaces. These findings support the suggestion of sexual conflict in diving beetles and a sexually antagonistic function of the rough female structures. In addition, males differed in their adhesive capacity on different female surfaces, indicating a male trade-off between adhering to smooth and rough female morphs.

Description of the second- and third-instar larvae of Hydrovatus crassulus Sharp, 1882 (Coleoptera: Dytiscidae: Hydrovatini)

Zootaxa ◽  
2021 ◽  
Vol 4999 (5) ◽  
pp. 469-478
Author(s):  
MARIANO C. MICHAT
Keyword(s):  
Abdominal Segment ◽  
Ventral Surface ◽  
The Other ◽  
Beetle Species ◽  
Short Hair ◽  
Ancestral Condition ◽  
Diving Beetle ◽  
Third Instar Larvae

The second- and third-instar larvae of the diving-beetle species Hydrovatus crassulus Sharp, 1882 are described and illustrated, including detailed morphometric and chaetotaxic analyses of the cephalic capsule, head appendages, legs, last abdominal segment and urogomphi. Larvae of this species lack the parietal pore PAo, the premental seta LA3 and the urogomphal seta UR8, and have the sensillum MN2 shaped as a short hair-like seta and the ventral surface of the abdominal segments II–V sclerotized. All these characteristics are shared with the other species of Hydrovatus Motschulsky, 1853 known in detail (H. caraibus Sharp, 1882) and therefore are considered diagnostic for the genus. Hydrovatus crassulus also characterizes by the presence of a small galea, which reinforces the hypothesis that this structure is part of the ancestral condition of Hydrovatus. Larvae of H. crassulus differ from those of H. caraibus in having a smaller size, a smaller ratio U/LAS, and a larger ratio U1/U2, and also in the presence (in most cases) of a secondary seta on the anteroventral surface of femur.

Deronectes kabilcevz sp. n. and D. propedoriae sp. n. from south-eastern Anatolia (Turkey) (Coleoptera, Dytiscidae, Hydroporinae)

Zootaxa ◽  
2019 ◽  
Vol 4691 (5) ◽  
pp. 589-600
Author(s):  
MEDENÝ AYKUT ◽  
ÝBRAHÝM HALÝL YILDIRIM ◽  
SADREDDÝN TUSUN ◽  
HANS FERY
Keyword(s):  
New Species ◽  
Group Analysis ◽  
The Other ◽  
Eastern Anatolia ◽  
Beetle Species ◽  
South Eastern ◽  
Female Holotype ◽  
Molecular Studies ◽  
Different Shapes ◽  
Diving Beetle

Two new diving beetle species of the subtribe Deronectina are described from south-eastern Anatolia. Deronectes kabilcevz sp. n. belongs to the D. longipes-subgroup of the D. parvicollis-group. It is externally similar to the other members of this subgroup, but can be separated by the different shape of the median lobe of aedeagus. Deronectes propedoriae sp. n. belongs to the D. doriae-group. Analysis of molecular studies suggests that the new species and D. doriae Sharp, 1882 are closely related but undoubtedly different with an uncorrected p distance of 7% in the cytochrome oxydase gene. Also external characters allow an easy separation although only the female holotype of the new species is known—the pronotum and the last abdominal ventrite of each have very different shapes. The habitus, the genitalia and other features of the species are illustrated. The keys to species of the respective groups of genus Deronectes are updated. Including the results of this study, 61 species of Deronectes are now known. 

scholarly journals Discovery of the Australian diving beetle Neobidessodes mjobergi (Zimmermann, 1922) in New Guinea (Coleoptera, Dytiscidae, Hydroporinae)

Check List ◽  
2021 ◽  
Vol 17 (2) ◽  
pp. 633-636
Author(s):  
Suriani Surbakti ◽  
Michael Balke ◽  
Lars Hendrich
Keyword(s):  
New Guinea ◽  
Beetle Species ◽  
First Report ◽  
Australian Species ◽  
Diving Beetle

The diving beetle genus Neobidessodes Hendrich & Balke, 2009 contains 10 species. Nine of them were considered endemic to Australia, one of them to the Trans Fly Savanna and Grasslands Ecoregion of New Guinea island. Here, we provide the first report of one of the Australian species, Neobidessodes mjobergi (Zimmermann, 1922), from the same region of New Guinea. We suggest that more focused research will reveal the occurrence of far more Australian diving beetle species in that region of New Guinea.

scholarly journals New records of the diving beetle Rhantus simulans Régimbart, 1908 in south-western Australia (Coleoptera, Dytiscidae, Colymbetinae)

Check List ◽  
2021 ◽  
Vol 17 (2) ◽  
pp. 643-648
Author(s):  
Lars Hendrich ◽  
Michael Balke
Keyword(s):  
Western Australia ◽  
Endemic Species ◽  
Male Genitalia ◽  
New Records ◽  
Conservation Value ◽  
Beetle Species ◽  
High Conservation ◽  
Diving Beetle

New distributional records of the rarely collected diving beetle Rhantus simulans Régimbart, 1908, an endemic species of south-western Australia, are presented. We also summarize what is known about its habitat. The occurrence of R. simulans indicates a high conservation value of the sampled wetland. For easier identification, we provide photographs of the habitus and male genitalia of R. simulans and R. suturalis (Macleay, 1825). Rhantus simulans is now recorded from 17 localities along the coast of south-western Australia. Furthermore, data on the location of other 31 diving beetle species are provided.

scholarly journals Discovery of the diving beetle Laccornis oblongus (Stephens, 1835) in Bavaria, southern Germany (Coleoptera, Dytiscidae, Hydroporinae, Laccornini)

Check List ◽  
2022 ◽  
Vol 18 (1) ◽  
pp. 79-84
Author(s):  
Lars Hendrich ◽  
Michael Manuel ◽  
Michael Balke
Keyword(s):  
Nature Reserve ◽  
Sampling Site ◽  
Beetle Species ◽  
Median Lobe ◽  
Southern Germany ◽  
First Time ◽  
Diving Beetle

The diving beetle Laccornis oblongus (Stephens, 1835) is recorded for the first time from Bavaria, southern Germany, which marks the most south-westerly record of the species known to date. Three specimens were collected in the Murnauer Moos nature reserve in Upper Bavaria. We summarize what is known about the species habitat in Germany and provide photographs of the sampling site and habitus, median lobe of aedeagus, and paramere of the species. We provide a checklist of the 20 other diving beetle species we found syntopic with L. oblongus. 

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