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1,694 results for “Weevil”
FIGURES 1–6. Plumolepilius andersoni. Male. 1, Dorsal habitus. 2, Lateral habitus. 3, Frontal view. 4, Abdominal ventrites I–V. 5, Aedeagus dorsal view. 5 in Taxonomy of the weevil genus Plumolepilius Barrios-Izás & Anderson (Coleoptera Curculionidae: Molytinae: Conotrachelini): new species from Central America
FIGURES 1–6. Plumolepilius andersoni. Male. 1, Dorsal habitus. 2, Lateral habitus. 3, Frontal view. 4, Abdominal ventrites I–V. 5, Aedeagus dorsal view. 5, Aedeagus lateral view.
FIGURE 4 in Allaeotes niger, a weevil introduced to Cuba and the only known New World Stromboscerini (Coleoptera: Curculionidae: Dryophthorinae)
FIGURE 4. Phylogram of Stromboscerini weevils, with map showing their native distribution in South-East Asia, plus two exterritorial records in Cuba (also enlarged) and Uganda. Digits at internodes are bootstrap values. Terminal names consist of BOLD sample ID (its last four digits correspond to specimen number), followed by the most detailed taxonomic name, country of origin and BIN number. Habitus image illustrates Cuban specimen 9972 of fully winged and likely volant A. niger. Black and red branches are those of Dryophthorini and Stromboscerini; red branches and terminals are those of non-monophyletic genus Allaeotes.
FIGURE 2 in Allaeotes niger, a weevil introduced to Cuba and the only known New World Stromboscerini (Coleoptera: Curculionidae: Dryophthorinae)
FIGURE 2. Specimens of Allaeotes niger intercepted at US ports of entry. A: from China; B: from the Dominican Republic. Images and copyright: Lourdes Chamorro.
Data from: Comparative genetic structure and demographic history in endemic Galápagos weevils
The challenge of maintaining genetic diversity within populations can be exacerbated for island endemics if they display population dynamics and behavioral attributes that expose them to genetic drift without the benefits of gene-flow. We assess patterns of genetic structure and demographic history in twenty seven populations of nine species of flightless endemic Galápagos weevils from nine of the islands and one winged introduced close relative. Analysis of mitochondrial DNA reveals significant population structure and moderately variable, though demographically stable, populations for lowland endemics (Fst= 0.094 to 0.541; π: 0.014 to 0.042; Mismatch p=0.003 to 0.026 and D (Tajima)=-0.601to1.203), in contrast to signals of past contractions and expansions in highland specialists on two islands (Mismatch p=0.003 to 0.026 and D (Tajima)=-0.601to1.203). We interpret this series of variable and highly structured population groups as a system of long-established independently founded island units, where structuring could be a signal of micro-allopatric differentiation due to patchy host plant distribution and poor dispersal abilities. We suggest that the severe reduction and subsequent increase of suitably moist habitat that accompanied past climatic variation could have contributed to the observed population fluctuations in highland specialists. We propose the future exploration of hybridization between the introduced and highland endemic species on Santa Cruz, especially given the expansion of the introduced species into the highlands, the sensitivity to past climatic variation detected in highland populations and the potentially threatened state of single-island endemics.
Transgressing Wallace´s Line brings hyperdiverse weevils down to earth
<p>Wallace´s Line, located in the heart of the Indo-Australian archipelago, has historically been hypothesized to strongly inhibit dispersal. Taxa crossing this barrier are confronted with different biota of Asian or Australian origin, respectively, but the extent to which these conditions have affected the evolution of the colonizing lineages remains largely unknown. We examined the potential correlations of body size, lifestyle and biogeographical distribution in the weevil genus Trigonopterus. These beetles are highly diverse both on foliage and in litter east of Wallace´s Line but occur exclusively in leaf litter in the west. Based on a comprehensive, dated phylogeny of 303 species, we inferred nine crossing events of Wallace´s Line, all from east to west. Five previously foliage-dwelling lineages changed their lifestyle to leaf litter habitats after crossing this barrier. Our results indicate that dispersal is not more likely in edaphic lineages, but rather that, abiotic and/or biotic factors may be responsible for the exclusive leaf litter habitat of Trigonopterus in Sundaland. This includes differences in climate, and the different predatory faunas of Australia-New Guinea, Wallacea, and Sundaland. A mimicry complex in New Guinea with Trigonopterus species as presumable model may be of relevance in this context.</p>
Data from: The gut microbiota of the pine weevil is similar across Europe and resembles that of other conifer-feeding beetles
The pine weevil (Hylobius abietis, Coleoptera: Curculionidae) is an important pest of conifer seedlings in Europe. Despite its economic importance, little is known about the composition of its gut microbial community and the role it plays in mediating the weevil's ability to utilize conifers as a food source. Here, we characterized the gut bacterial communities of different populations of H. abietis across Europe and compared them to those of other beetles that occupy similar ecological niches. We demonstrate that the microbial community of H. abietis is similar at higher taxonomic levels (family and genus) across locations in Europe, with Wolbachia as the dominant microbe, followed by Enterobacteria and Firmicutes. Despite this similarity, we observed consistent differences between countries and locations, but not sexes. Our meta-analysis demonstrates that the gut bacterial community of the pine weevil is very similar to that of bark beetles that also exploit conifers as a food source. The Enterobacteriaceae symbionts of both host taxa are especially closely related phylogenetically. Conversely, the microbiota of H. abietis is distinct from that of closely related weevils feeding on non-conifer food sources, suggesting that the microbial community of the pine weevil is determined by the environment and may be relevant to host ecology. Furthermore, several H. abietis-associated members of the Enterobacteriaceae family are known to contain genes involved in terpenoid degradation. As such, we hypothesize that the gut microbial community is important for the utilization of conifer seedlings as a food source, either through the detoxification of plant secondary metabolites or supplementation of essential nutrients.
FIGURES 25 in Baezia vulcania sp. n., an endogeous weevil from La Palma I. (Canary Is.) (Coleoptera: Curculionidae: Molytinae)
FIGURES 25. Baezia vulcania sp. n. 2: Penis, dorsal and side view. 3: Tegmen, dorsal view. 4. Ovipositor, dorsal view. 5. Spiculum ventrale, ventral view. Scale: 23: 100 m; 45: 47 m.
FIGURES 1–6 in Eugnamptine weevils of La Selva, Costa Rica (Coleoptera: Rhynchitidae)
FIGURES 1–6. Male genitalia, Eugnamptine spp., line = 1 mm. a) Tegmen, dorsal view, b) Median lobe with endophallic sac and TA in repose, ventral view: 1) H. obliteratus 2) E. sulcicollis 3) E. laticeps 4) E. rostralis 5) E. pusillus 6) E. herediensis
FIGURES 7–12 in Eugnamptine weevils of La Selva, Costa Rica (Coleoptera: Rhynchitidae)
FIGURES 7–12. Male genitalia, Eugnamptine spp., line = 1 mm. a) Tegmen, dorsal view, b) Median lobe with endophallic sac and TA in repose, ventral view: 7) E. longiusculus 8) E. bellus 9) E. sarapiquensis 10) E. balius 11) E. suturalis 12) E. basalis
FIGURES 1–3 in A new species of the weevil genus Ceutorhynchus Germar from Eastern Mediterranean Turkey (Coleoptera: Curculionidae)
FIGURES 1–3. Ceutorhynchus doganlari Gültekin, sp. n. (1–2; holotype) and C. karamani Müller (3): 1 — body outline; 2–3 — aedeagus. Scale bar: 0,25 mm.
FIGURES 2–8 in Eurycleonus talamellii n. sp. of Cleonine weevil from the Moroccan desert (Coleoptera: Curculionidae: Lixinae: Cleonini)
FIGURES 2–8. Eurycleonus talamellii, holotypus: aedeagus, apex (3) and lateral view (4); rostrum in lateral view (7). E. talamellii, paratypus Ψ: antenna (2); sternum VIII (5); spermatheca (6). E. gigas, Tunisia: rostrum in lateral view (8); bar: figs 3, 6: 1 mm; figs 2, 5: 2 mm; fig. 4: 3 mm; figs 7, 8: 4 mm.
FIGURE 9 in Eurycleonus talamellii n. sp. of Cleonine weevil from the Moroccan desert (Coleoptera: Curculionidae: Lixinae: Cleonini)
FIGURE 9. Eurycleonus talamellii, distribution (maps taken from Encarta World Atlas 2000 (Microsoft Corporation), elaborated with Photoshop 7.0 (Adobe Systems Incorporated)).
FIGURES 7–10 in A new species of Emersonella (Hymenoptera: Eulophidae), parasitoid on weevil eggs (Coleoptera: Curculionidae), from Costa Rica
FIGURES 7–10. Juvenile stages of Emersonella curculiovora sp. nov. 7. Host egg case (arrow) on stem of Cinnamomum cinnamomifolium. 8. Mature larva (arrow) in situ (host's cementenclosure partially removed). 9. Dorsal view of a female pupa (note meconium around the ovipositor). 10. Mature pupa (arrow) in situ (host's cementenclosure cement partially removed).
FIGURES 1–4 in A new species of Emersonella (Hymenoptera: Eulophidae), parasitoid on weevil eggs (Coleoptera: Curculionidae), from Costa Rica
FIGURES 1–4. Emersonella curculiovora sp.nov. 1. Head frontal, female. 2. Head and pronotum dorsal, female. 3. Mesosoma dorsal, female. 4. Apical gastral tergite dorsal, female.
FIGURES 1–7 in A new species of the weevil genus Larinus Dejean from Turkey and Syria (Coleoptera: Curculionidae: Lixinae)
FIGURES 1–7. Larinus perrinae Gültekin, sp. n. (1, 2, 4; holotype; 3; paratype), Larinus lejeunei Capiomont (5–6) and Larinus remissus Faust (7): 1, body outline; 2, rostrum (male); 3, rostrum (female); 4, aedeagus; 5, body outline (female, from Algeria, compared with type); 6, aedeagus; 7, aedeagus (from Nahcivan, compared with type). Scale bar: 1 mm.
FIGURES 2–5 in A synopsis of the orchid weevil genus Orchidophilus Buchanan (Curculionidae, Baridinae), with taxonomic rectifications and description of one new species
FIGURES 2–5. Habitus of Orchidophilus species, dorsal and lateral aspects. 2, O. aterrimus; 3, O. ran; 4, O. eburifer; 5, O. insidiosus. Scale bar 1 mm.
FIGURES 6–9 in A synopsis of the orchid weevil genus Orchidophilus Buchanan (Curculionidae, Baridinae), with taxonomic rectifications and description of one new species
FIGURES 6–9. Form of distal ventrites of Orchidophilus species. 6, O. aterrimus, large male; 7, O. epidendri, male; 8, O. peregrinator, male; 9, O. aterrimus, O. epidendri, O. peregrinator, O. ran, female. Schematic.
FIGURE 1 in A synopsis of the orchid weevil genus Orchidophilus Buchanan (Curculionidae, Baridinae), with taxonomic rectifications and description of one new species
FIGURE 1. Map showing natural occurrences (bullets) and inadvertent introductions (stars) of Orchidophilus species.
FIGURE 11 in A preliminar overview of species composition and geographical distribution of Malvinian weevils (Insecta: Coleoptera: Curculionidae)
FIGURE 11. Dorsal and lateral views of Morronia brevirostris (A–B) and Antarctobius malvinensis (C–D).
FIGURE 14 in A preliminar overview of species composition and geographical distribution of Malvinian weevils (Insecta: Coleoptera: Curculionidae)
FIGURE 14. Map of Islas Malvinas showing distribution of Puranius scaber (circles); P. championi (squares); and P. exsculpticollis (triangles).
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
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