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1,009 results for “water beetles”
Fig. 10 in Endemic and sub-endemic water beetles of Mongolia and their distribution ranges
Fig. 10. Similarities of endemic beetle fauna among the sub-basins of Mongolia.
Fig. 11. A in Endemic and sub-endemic water beetles of Mongolia and their distribution ranges
Fig. 11. A dendrogram of water beetle faunal similarity of Mongolia and adjacent territories.
Fig. 1 in Hydrophilus harpe sp. nov., a remarkable new species of giant water scavenger beetle from Brazil (Coleoptera: Hydrophilidae)
Fig. 1. Hydrophilus (D.) harpe sp. nov., male paratype; dorsal and ventral habitus.
Irreversible habitat specialization does not constrain diversification in hypersaline water beetles
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Water, not carbon, drives drought-constraints on stem terpene defense against simulated bark beetle attack in Pinus edulis
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FIGURES 6A–C in Taxonomy of Venezuelan water beetles in the genus Hydrochus Leach, 1817, and an analysis of male genitalia morphology (Coleoptera: Hydrochidae)
FIGURES 6A–C. (A) Male genitalia of H. ducalis Knisch, with parameres spread, showing shape of aedeagus; (B) Male genitalia of H. variabilis Knisch and (C) H. n. sp. from Peru, showing the articulation point of the paramere dorsal basal lobe with the aedeagus dorsal basal lobe.
FIGURE 5 in Taxonomy of Venezuelan water beetles in the genus Hydrochus Leach, 1817, and an analysis of male genitalia morphology (Coleoptera: Hydrochidae)
FIGURE 5. Examples of morphological, species specific, variation in the form of the aedeagus basal dorsal lobe (adbl) of Venezuelan Hydrochus species.
FIGURES 4A–B in Taxonomy of Venezuelan water beetles in the genus Hydrochus Leach, 1817, and an analysis of male genitalia morphology (Coleoptera: Hydrochidae)
FIGURES 4A–B. Male genitalia characters of (A) H. pseudosecretus Oliva (ventral); (B) H. sagittarius n. sp. (ventral; diagrammatical, showing locations of muscles).
FIGURES 7–10 in Suphisellus grossoi sp. n., a new burrowing water beetle from South America and notes on S. flavolineatus (Régimbart, 1889) and S. grammicus (Sharp, 1882) (Coleoptera: Noteridae)
FIGURES 7–10. Male genitalia of Suphisellus grossoi sp. n.: (7) Apex of segment IX, right lateral aspect; (8) Left lateral lobe, right lateral aspect; (9) Right lateral lobe, right lateral aspect; (10) Median lobe, right lateral aspect. Scale bars = 0.05 mm for Fig. 7 and 0.25 mm for Figs 8–10.
FIGURES 18–21 in Suphisellus grossoi sp. n., a new burrowing water beetle from South America and notes on S. flavolineatus (Régimbart, 1889) and S. grammicus (Sharp, 1882) (Coleoptera: Noteridae)
FIGURES 18–21. Male genitalia of S. flavolineatus, lectotype of S. melzeri Zimmermann, 1925. (18) Segment IX, right lateral aspect; (19) Left lateral lobe, right lateral aspect; (20) Right lateral lobe, right lateral aspect; (21) Median lobe, right lateral aspect. Scale bar = 0.5 mm. Photographs provided by Ditta Amran Balke, ZSM.
FIGURES 4–6 in Suphisellus grossoi sp. n., a new burrowing water beetle from South America and notes on S. flavolineatus (Régimbart, 1889) and S. grammicus (Sharp, 1882) (Coleoptera: Noteridae)
FIGURES 4–6. Prosternum of male of Suphisellus species, ventral aspect: (4) S. grossoi sp. n.; (5) S. grammicus; (6) S. flavolineatus. Scale bar = 0.5 mm.
FIGURE 19 in Three new species and DNA sequence data of the rare South American water beetle genus Adelphydraena Perkins, 1989 (Coleoptera: Hydraenidae)
FIGURE 19. Phylogenetic tree obtained with IQ-TREE. Numbers in nodes, ultrafast bootstrap / SH-like aLRT support.
FIGURES 14–15. 14 in Three new species and DNA sequence data of the rare South American water beetle genus Adelphydraena Perkins, 1989 (Coleoptera: Hydraenidae)
FIGURES 14–15. 14. Geographical distribution of Adelphydraena species. 15. Type locality of Adelphydraena spinosa, in Guyana. Photo. by A. Short.
FIGURES 16–18 in Three new species and DNA sequence data of the rare South American water beetle genus Adelphydraena Perkins, 1989 (Coleoptera: Hydraenidae)
FIGURES 16–18. Habitats of Adelphydraena species. 16–17. Collecting locality of Adelphydraena orchymonti, in Venezuela, Amazonas prov., Cerro Cuau env. 18. Collecting locality of Adelphydraena spangleri, in Venezuela, Bolívar prov., La Gran Sabana, Yaro Parú. Photos. by F. Čiampor.
FIGURES 11–12. 11. Adelphydraena spinosa n in Three new species and DNA sequence data of the rare South American water beetle genus Adelphydraena Perkins, 1989 (Coleoptera: Hydraenidae)
FIGURES 11–12. 11. Adelphydraena spinosa n. sp., spermatheca and terminal abdominal segments. 12. Adelphydraena surinamensis n. sp., spermatheca and terminal abdominal segments.
FIGURES 5–6. 5 in Three new species and DNA sequence data of the rare South American water beetle genus Adelphydraena Perkins, 1989 (Coleoptera: Hydraenidae)
FIGURES 5–6. 5. Adelphydraena spangleri Perkins, non-type aedeagus and last tergites. 6. Adelphydraena surinamensis n. sp., holotype aedeagus and last tergite.
FIGURES 9–10. 9. Adelphydraenaspinosa n in Three new species and DNA sequence data of the rare South American water beetle genus Adelphydraena Perkins, 1989 (Coleoptera: Hydraenidae)
FIGURES 9–10. 9. Adelphydraenaspinosa n. sp., holotypeaedeagus. 10. Adelphydraenaorchymonti Perkins, non-type, aedeagus.
Data from: Environmental niche divergence between genetically distant lineages of an endangered water beetle
Historically, there has been considerable disagreement between researchers about the criteria used to discriminate among species. Decisions based on traditional morphological and genetic data alone can be potentially problematic, especially if the hypotheses are contradictory. Today, taxonomy is integrating new methods from different disciplines that study species' limits and evolution; this diverse range of evidence aids researchers in the recognition of species. Differences in niche characteristics could become a new and useful criterion in helping to decide the status of conflicting taxonomical entities. Ochthebius glaber (family Hydraenidae) is an endangered water beetle typical from southeast Iberian hypersaline streams that shows three clear discrete genetic units within its distribution range. However, there is no evidence to date that these lineages of O. glaber exhibit any adaptive morphological or ecological divergence. Using a modelling approach directed to generate niche representation from distributional data, we found a significant environmental niche divergence for allopatric lineages of O. glaber that followed an aridity gradient. Although we can not conclude firmly at present that the separate populations of O. glaber studied represent separate, reproductively isolated species, this study complements and supports previous phylogeographic analyses through the inclusion of measures of another form of evolutionary change; in this case, ecological diversification. Despite the existence of some methodological limitations, also discussed in this work, we emphasise the importance of recent conceptual advances that allow taxonomy to improve species delimitation practices through the integration of theory and methods from disciplines that study the origin and evolution of species.
FIGURES 2–3. Limnebius acupunctus. —2 in Limnebius acupunctus, a new species of water beetle from Australia and Papua New Guinea (Coleoptera: Hydraenidae)
FIGURES 2–3. Limnebius acupunctus. —2. Aedeagus of holotype. —3. Aedeagus of specimen from Northern Territory, Adelaide River at Daly River Road crossing.
FIGURES 14–17. Gymnanthelius aedeagi. —14. G in A revision of the Australian endemic water beetle genus Gymnanthelius Perkins (Coleoptera: Hydraenidae)
FIGURES 14–17. Gymnanthelius aedeagi. —14. G. hieroglyphicus (specimen from NSW, Khancoban). —15. G. po rc h i (holotype). —16. G. tu nic u s (holotype). —17. G. maxipunctus (holotype).
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Allen Brain Atlas
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