A new classification of the tribe Hygrotini Portevin, 1929 (Coleoptera: Dytiscidae: Hydroporinae)

Villastrigo, Adrián; Ribera, Ignacio; Manuel, Michaël; Millán, Andrés; Fery, Hans

doi:10.11646/zootaxa.4317.3.4

Cited by 594 publications

(5 citation statements)

References 22 publications

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“…To answer these questions we built a molecular phylogeny with almost half of the 137 known species of the tribe, including all genera and recognised main species groups (Nilsson & Hájek, ,b), and compiled data on the ecological tolerances of all described species from the literature and our own observations. In addition, our results demonstrated that two of the four currently recognised genera of Hygrotini and one subgenus are para‐ or polyphyletic, revealing the need of a new classification of the tribe, which will be presented in a separate paper (Villastrigo, Ribera, Manuel, Millán, & Fery, ).…”

Section: Introductionmentioning

confidence: 78%

“…Species of Hyphoporus have always been considered to be related to the species of Herophydrus , of which they differ mostly in the male genital shape (e.g., Biström & Nilsson, ; Miller & Bergsten, ). The non‐monophyly of genera Hygrotus and Herophydrus and subgenera Hygrotus and Coelambus requires a revised classification of the tribe, which will be formalised in a separate paper (Villastrigo et al., ).…”

Section: Discussionmentioning

confidence: 99%

“…The taxonomic classification of Hygrotini has suffered multiple changes, and some of the characters used to define genera (such as e.g., the morphology of the clypeus) are difficult to interpret and characterise (see e.g., Anderson, ; Balfour‐Browne, ; Biström & Nilsson, ; Falkenström, ; Villastrigo et al., ). Species for which no molecular data were available were thus considered to be closely related to those showing a high morphological similarity, based both on external characters and on the female and male genitalia.…”

Section: Methodsmentioning

confidence: 99%

“…Species for which no molecular data were available were thus considered to be closely related to those showing a high morphological similarity, based both on external characters and on the female and male genitalia. We also recognised diagnostic characters or character combinations of the different clades of the molecular phylogeny and tested their presence in the species without molecular data (see Villastrigo et al., for more details). We used Mesquite v3.20 (Maddison & Maddison, ) to manually place all species in their most likely position in the phylogenetic tree, and collapsed uncertain nodes to create polytomies.…”

Section: Methodsmentioning

confidence: 99%

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Evolution of salinity tolerance in the diving beetle tribe Hygrotini (Coleoptera, Dytiscidae)

Villastrigo

Fery²,

Manuel

et al. 2017

Zoologica Scripta

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Some species of the diving beetle tribe Hygrotini (subfamily Hydroporinae) are among the few insects able to tolerate saline concentrations more than twice that of seawater. However, the phylogenetic relationships of the species of Hygrotini, and the origin and evolution of tolerance to salinity in this lineage, are unknown. In this work, we aim to reconstruct how many times salinity tolerance did evolve in Hygrotini, whether this evolution was gradual or if tolerance to hypersalinity could evolve directly from strictly freshwater (FW) species, and to estimate the probabilities of transition between habitats. We build a phylogeny with ca. 45% of the 137 species of Hygrotini, including all major lineages and almost all of the known halophile or tolerant species. We used sequence data of four mitochondrial (COI-5′, COI-3′, 16S + tRNA and NADH1) and three nuclear (28S, 18S and H3) gene fragments, plus ecological data to reconstruct the history of the salinity tolerance using Bayesian inference. Our results demonstrate multiple origins of the tolerance to salinity, although most saline and hypersaline species were concentrated in two lineages. The evolution of salinity was gradual, with no direct transitions from FW to hypersaline habitats, but with some reversals from tolerant to FW species. The oldest transition to saline tolerance, at the base of the clade with the highest number of saline species, was dated in the late Eocene-early Oligocene, a period with decreasing temperature and precipitation. This temporal coincidence suggests a link between increased aridity and the development of tolerance to saline waters, in agreement with recent research in other groups of aquatic Coleoptera.

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Section: Introductionmentioning

confidence: 78%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Evolution of salinity tolerance in the diving beetle tribe Hygrotini (Coleoptera, Dytiscidae)

Villastrigo

Fery²,

Manuel

et al. 2017

Zoologica Scripta

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“…For most of the species we have taxonomic, distribution and biogeographical information available from recent reviews: for Canthyporus hottentottus (Gemminger and Harold, 1868) see Biström and Nilsson (2006); for Hygrotus inquinatus Boheman 1848 see Biström and Nilsson (2002) for the species' distribution and Villastrigo et al (2017Villastrigo et al ( , 2018 for their phylogenetic placement and taxonomy; for Laccophilus lineatus Aubé 1838 and Laccophilus taeniolatus Régimbart 1889 see Biström et al (2015); for Hydrovatus macrocerus Régimbart 1895 and Hydrovatus sobrinus Omer-Cooper 1957 see Biström (1997).…”

Section: Species Samplingmentioning

confidence: 99%

Geographic variation in acclimation responses of thermal tolerance in South African diving beetles (Dytiscidae: Coleoptera)

Hidalgo‐Galiana

Ribera

Terblanche

2021

Comparative Biochemistry and Physiology Part A: Molecular &

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Understanding sources of variation in animal thermal limits is critical to forecasting ecological responses to climate change. Here, we estimated upper and lower thermal limits, and their capacity to respond to thermal acclimation, in several species and populations of diving beetles (Dytiscidae) from diverse geographic regions representative of variable climate within South Africa. We also considered ecoregions and latitudinal ranges as potential predictors of thermal limits and the plasticity thereof. For upper thermal limits, species showed significant variation and limited acclimation-related plasticity. Lower thermal limits responded to acclimation in some cases and showed marked variation among species that could be explained by taxonomic affiliation and ecoregion. Limited acclimation ability in the species included in this study suggest plasticity of thermal limits will not be a likely buffer for coping with climate change. From the present results for the Dytiscidae of the region, it appears the group may be particularly susceptible to heat and/or drought and may thus serve as useful indicator species of ecosystem change. Understanding how these climate-related impacts play out at different spatial and temporal scales will have profound implications for conservation management and functional responses, especially important in a region already showing a trend for warming and drying.

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The Phylogeny and Classification of Predaceous Diving Beetles (Coleoptera: Dytiscidae)

Miller

Bergsten²

2023

Ecology, Systematics, and the Natural History of Predaceous Diving Beetles (Coleoptera: Dytiscidae)

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A new classification of the tribe Hygrotini Portevin, 1929 (Coleoptera: Dytiscidae: Hydroporinae)

Cited by 594 publications

References 22 publications

Evolution of salinity tolerance in the diving beetle tribe Hygrotini (Coleoptera, Dytiscidae)

Evolution of salinity tolerance in the diving beetle tribe Hygrotini (Coleoptera, Dytiscidae)

Geographic variation in acclimation responses of thermal tolerance in South African diving beetles (Dytiscidae: Coleoptera)

The Phylogeny and Classification of Predaceous Diving Beetles (Coleoptera: Dytiscidae)

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