Abstract The beetle series S taphyliniformia exhibits extraordinary taxonomic, ecological and morphological diversity. To gain further insight into staphyliniform relationships evolution, we reconstructed the phylogeny of using DNA sequences from nuclear 28S rDNA protein‐coding gene CAD for 282 species representing all living families most subfamilies, a representative sample carabaeiformia serving as near outgroup, three additional beetles more distant outgroups. Under both B ayesian...

Abstract The phylogeny and evolutionary history of the water scavenger beetles ( C oleoptera: H ydrophilidae) are inferred from comprehensive analyses DNA sequence data mitochondrial genes COI , COII 16S nuclear 18S 28S arginine kinase . Bayesian maximum parsimony included 151 taxa, representing all subfamilies, tribes subtribes that have ever been proposed in family, as well representatives hydrophiloid families elophoridae, ydrochidae, S percheidae, E pimetopidae G eorissidae. resulting...

Recently, McKenna et al., 2015 (MCK15 hereafter) investigated the higher level phylogenetic relationships of beetles (Insecta, Coleoptera) using most comprehensive molecular dataset to date, and inferred absolute ages major groups multiple fossil calibrations across beetle tree life. Based on result their dating analysis, diverged from Strepsiptera in Early Permian c. 278.33 Ma with a 95% credibility interval (95% CI) 288.28 271.89 Ma, crown age Coleoptera was estimated for Late 252.89 CI:...

The Neotropical water scavenger beetle genus Globulosis García, 2001 is revised. Originally described from a single male specimen southeastern Venezuela, the has since been found in localities across Guiana Shield region and beyond, including Colombia, Suriname, Guyana, Brazil. redescribed. Morphological characters genetic data mitochondrial gene COI ten populations its range provide support for two distinct species, corresponding loosely to geography. type G. hemisphericus redescribed newly...

New World species assigned to the Helochares subgenus Hydrobaticus MacLeay are reviewed based on adult morphology and DNA sequence data. Nine recognized, including five here described as new: (Hydrobaticus) laevis n. sp. (Mexico), H. nexus (Ecuador, Panama, Venezuela), politus (Guatemala), trujillo (Venezuela), zamora (Ecuador). records provided for three previously species: championi Sharp, 1882 (Costa Rica, Guatemala, Nicaragua), maculicollis Mulsant, 1844 (United States), normatus...

Notomicrus petrareptans sp. n. is described from an inselberg seepage in southwestern Suriname. This species diagnosable by a combination of its weakly punctate elytra, respective shapes the pro- and mesotarsal claws (males), long slender median lobe aedeagus. first member subfamily Notomicrinae to be hygropetric seep habitats only second known seep-dwelling family Noteridae. Diagnostic characters are illustrated habitat images provided.

Nine new species of the water scavenger beetle genus Oocyclus Sharp, 1882 are described from Brazilian Shield: O. ecolab sp. n., espinhacu giganteus humboldti lacia ovalis sulcatus thrixdiastematus and thysanus n. New locality records provided for four previously known Brazil: rotundus Clarkson Short, 2012, pilosus Jordo, Clarkon Ferreira-Jr, 2018, xanthus 2012 yubai 2012. All associated with rock-face seepages such as wet rocks, waterfalls, seepages. An updated key to is provided.

Abstract The beetle suborder A dephaga has been the subject of many phylogenetic reconstructions utilizing a variety data sources and inference methods. However, no strong consensus yet emerged on relationships among major adephagan lineages. Ultraconserved elements ( UCEs ) have proved useful for inferring difficult or unresolved phylogenies at varying timescales in vertebrates, arachnids H ymenoptera. Recently, UCE bait set was developed C oleoptera using polyphagan genomes member order S...

With more than 13 000 described species (Fig. 1, Table 1), water beetles are one of the most globally abundant groups aquatic insects. Among insect orders, only Diptera has taxa (though just as larvae) Coleoptera, and two largest beetle families, Dytiscidae Hydrophilidae, each have either Ephemeroptera or Plecoptera. This rich diversity is not result a single invasion, but rather repeated macroecological shifts from terrestrial habitats throughout 300 Ma evolutionary history (Toussaint et...

Hydaticus aequalis sp. n. is described from Brazil, where it was recently discovered in the central lowlands region of Amazon forest. The new species differs all other Neotropical congeners by its uniformly brown dorsal surface and shape medial lobe. habitus male genitalia are illustrated, a distribution map provided. habitat, small stream associated forest pool, illustrated described. In addition, record H. devexus Trémouilles, 1996, previously known single specimen, reported highlands...

Hamadiana chapadensis gen. n. and sp. is described based on a single male specimen collected in Central Brazil. The new species belongs to the diving beetle tribe Laccophilini but could not be assigned any existing genera, therefore genus accommodate it. unique among having hind margin of metacoxal process deeply incised medially slightly protruded backwards. In addition, it differs from other genera by antennomeres simple, expanded, lines straight, metatibiae with two simple apical spurs....

The water scavenger beetle genus Protistolophus Short contains a single species, P. spangleri Short, 2010, known from southern Venezuela. was hitherto only partly-incomplete male specimen, making it one of the rarest and most poorly aquatic hydrophilid genera in world. Only other New World genus, Ecuadorian cave endemic Troglochares Spangler, is specimen or locality. In phylogenetic analysis Hydrophilini based on adult morphology, resolved as sister taxon to remaining tribe, implying an...

The Neotropical water scavenger beetle genus Chasmogenus Sharp, 1882 is a diverse lineage with 34 described species. Here, three new species from the southwestern margin of Guiana Shield are using an integrative approach combining adult morphology and molecular data: clinatus sp. n. (Brazil: Amazonas, Venezuela: Amazonas), C. gironae (Venezuela: inpa Amazonas). Examination male genitalia essential for confident identifications thus unassociated females may prove extremely difficult to...

Explaining the disparity of species richness across tree life is one great challenges in evolutionary biology. Some lineages are exceptionally rich, while others relatively poor. One explanation for heterogeneity among clade that older clades more rich because they have had time to accrue diversity than younger clades. Alternatively, may be due among-lineage diversification rate variation. Here we investigate water scavenger beetles (Hydrophilidae), which vary major by as much 20 fold. Using...

ABSTRACT Adephaga is the second largest suborder of beetles (Coleoptera) and they serve as important arthropod predators in both aquatic terrestrial ecosystems. The divided into Geadephaga comprising families Hydradephaga for lineages. Despite numerous studies, phylogenetic relationships among adephagan monophyly itself remain question. Here we conduct a comprehensive phylogenomic analysis using ultraconserved elements (UCEs). This study presents first vitro test newly developed UCE probe...

Aquatic beetles often have been regarded as mobile transients among water bodies, but recent studies suggest strong environmental influences on distribution and thus the potential for using bioindicators of habitat quality. We related aquatic beetle assemblage structure to characteristics at 9 sites within a 0.5-km2 landscape in northern Delaware, USA. sampled 6 temporary ponds (3 closed-canopy with short hydroperiods 3 open-canopy longer hydroperiods) permanent pond beaver pond. To evaluate...

Abstract Aim We tested the hypothesis that ancient vicariance in giant water scavenger beetles shaped their current distribution. Location Worldwide except Antarctica. Methods inferred a molecular phylogenetic for tribe Hydrophilini using probabilistic methods based on broad geographical and taxonomic sampling. used fossil‐based dating likelihood model‐based ancestral range estimation to reconstruct biogeography of this clade. Results Our results suggest originated Cretaceous about 120 Ma...

Abstract Meruidae, or comb-clawed cascade beetles, are a recently discovered monotypic family of Adephaga endemic to Venezuela. The larvae Meruidae described for the first time, based on material Meru phyllisaeSpangler & Steiner, 2005, collected together with adults in southern External morphological features, including chaetotaxy, reported mature larva and an assessment made polarity larval characters phylogenetic utility Adephaga. Larvae possess mixture primitive derived character...

The origin of biodiversity in the Neotropics predominantly stems either from Gondwana breakup or late dispersal events Nearctic region. Here, we investigate biogeography a diving beetle clade whose distribution encompasses parts Oriental region, Indo‐Australian archipelago (IAA) and Neotropics. We reconstructed dated molecular phylogeny, inferred diversification dynamics estimated ancestral areas under different biogeographic assumptions. For region IAA, reveal repeated complex colonization...