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196 results for “cuticular”
FIGURES 5–7 in Two new species of Eupholus Boisduval (Coleoptera, Curculionidae, Entiminae), with observations on coloured cuticular exudates in weevils
FIGURES 5–7. Head and rostrum of Eupholus spp.: (5) E. euphrosyne; (6) E. sedlaceki; (7) E. mimicus.
FIGURES 23–31 in Two new species of Eupholus Boisduval (Coleoptera, Curculionidae, Entiminae), with observations on coloured cuticular exudates in weevils
FIGURES 23–31. Female genitalia of Eupholus spp.: (23–25) sternite VIII; (26–28) tergite VIII; (29–31) spermatheca. (23, 26, 30) E. euphrosyne; (24, 27, 31) E. sedlaceki; (25, 28, 29) E. mimicus.
FIGURES 1–4 in Two new species of Eupholus Boisduval (Coleoptera, Curculionidae, Entiminae), with observations on coloured cuticular exudates in weevils
FIGURES 1–4. Habitus of Eupholus spp.: (1) E. mimicus, holotype (2) E. sedlaceki, holotype; (3) E. euphrosyne, female (Aseki); (4) E. sedlaceki, female (Wau).
FIGURES 8–10 in Two new species of Eupholus Boisduval (Coleoptera, Curculionidae, Entiminae), with observations on coloured cuticular exudates in weevils
FIGURES 8–10. Male genitalia of Eupholus euphrosyne: (8) aedeagus in lateral aspect; (9) aedeagus in dorsal aspect; (10) detail of transfer apparatus.
FIGURES 14–22 in Two new species of Eupholus Boisduval (Coleoptera, Curculionidae, Entiminae), with observations on coloured cuticular exudates in weevils
FIGURES 14–22. Female genitalia of Eupholus spp., upper row: overview in ventral aspect; middle row: vagina, bursa copulatrix and base of hemisternites in ventral aspect; lower row: left hemisternite. (14, 17, 20) E. euphrosyne; (15, 18, 21) E. sedlaceki; (16, 19, 22) E. mimicus.
FIGURES 32–37 in Two new species of Eupholus Boisduval (Coleoptera, Curculionidae, Entiminae), with observations on coloured cuticular exudates in weevils
FIGURES 32–37. Base of left elytron of Eupholini with yellow coloration; overview (left); detail (right): (32–33) Eupholus mimicus; note yellow scales; (34–35) Eupholus euphrosyne; note cream-coloured setae holding yellow particles; (36–37) Rhinoscapha cf. thomsoni; note incrustation of yellow substance.
Kin recognition in Drosophila: Rearing environment and relatedness can modulate gut microbiota and cuticular hydrocarbon odour profiles
<p>From inbreeding avoidance to kin-selected cooperation, social behaviours are frequently reliant on kin recognition. However, kin recognition mechanisms are costly to evolve and currently not very well understood. Recent evidence suggests that, by altering their host's odour, gut and other host-associated microorganisms may provide a promising avenue for understanding kin recognition. In Drosophila melanogaster, kin recognition can mediate mate choice, sexual conflict and larval competition/cooperation, underscoring its important functional role. As is commonly the case, kin recognition in this species depends on both familiarity (i.e. shared rearing environment) and relatedness, and seems to rely mainly on body odours determined by cuticular hydrocarbons. Here, we investigated the degree to which larval rearing environment and relatedness (full-sibs vs. unrelated) determine co-variation between gut microbiota and cuticular hydrocarbons in D. melanogaster. We found that rearing environment strongly determined both microbiota and cuticular hydrocarbon composition, but that these effects were independent from each other. In contrast, relatedness did not influence microbiota composition, but had a strong influence on microbiota diversity, which in turn covaried significantly with cuticular hydrocarbon composition. Our results show that, in D. melanogaster, odours may convey information about both familiarity and relatedness via an interaction between: a) direct effects of the rearing environment on cuticular hydrocarbons and b) indirect effects of relatedness on cuticular hydrocarbons via gut microbiota diversity.</p>
Insect cuticular hydrocarbon composition influences their interaction with spider capture threads - Raw data
<p>Raw data of the manuscript entitled "Insect cuticular hydrocarbon composition influences their interaction with spider capture threads", published in the Journal of Experimental Biology</p>
FIGURE 11 in A new Hyalella species (Crustacea: Amphipoda: Hyalellidae) from South American Highlands (Argentina) with comments on its cuticular ultrastructure
FIGURE 11. Types of microtrichs, pores and denticles as observed under SEM. A pores and denticles from labrum apex of male H. fatimae n. sp. B P2 pores on peduncle of uropod 3 from female H. fossamancinii C T1a denticles on basis of gnathopod 1 from male H. fatimae n. sp. D detail of coxal plate margin of male H.fatimae n.sp. E detail of ornamentation of carpus of gnathopod 1 from female H. fatimae n. sp. F Ie microtrich on coxal plate from female H. fatimae n.sp., arrow indicates the filament G Ia microtrich on margin of coxal plate from female H. fatimae n. sp.
FIGURE 8. Hyalella fatimae n in A new Hyalella species (Crustacea: Amphipoda: Hyalellidae) from South American Highlands (Argentina) with comments on its cuticular ultrastructure
FIGURE 8. Hyalella fatimae n. sp., male holotype. A pleopod 3 B uropod 1 C uropod 2 (Ur2 I: left uropod 2; Ur2 D, IR: right uropod 2, inner ramus) D uropod 3 E telson F telson of male paratype. Scale bars: 0.1mm.
FIGURE 7. Hyalella fatimae n in A new Hyalella species (Crustacea: Amphipoda: Hyalellidae) from South American Highlands (Argentina) with comments on its cuticular ultrastructure
FIGURE 7. Hyalella fatimae n. sp., male holotype. A pereiopod 3 B pereiopod 4 C pereiopod 5 D pereiopod 6 E pereiopod 7.
FIGURE 4. Hyalella fatimae n in A new Hyalella species (Crustacea: Amphipoda: Hyalellidae) from South American Highlands (Argentina) with comments on its cuticular ultrastructure
FIGURE 4. Hyalella fatimae n. sp., male holotype. A epimeral plates B antenna 1, arrow indicates detail of the two distal articles C antenna 2 D labrum E right mandible, arrow indicates detail of incisor F left mandible. Scale bars: 0. 1 mm.
FIGURE 10 in A new Hyalella species (Crustacea: Amphipoda: Hyalellidae) from South American Highlands (Argentina) with comments on its cuticular ultrastructure
FIGURE 10. Types of setae, pores and denticles as observed under SEM A uropod 2 (apex of ramus) of female H. fossamancinii, arrow indicates the "mobile socket" on B3 seta B uropod 1 (apex of ramus) of female H. fatimae n.sp., arrow indicates the B4-like seta C F3 seta from inner surface of propodus of gnathopod 1 of male H. fatimae n.sp. D details of inner plate of maxilla 2 from male H. fossamancinii, arrow indicates one E3 seta E outer plate of maxilla 1 of male H. fatimae n.sp., arrow indicates the F4 seta F setae and denticles from palm of female gnathopod 1 from H. fatimae n.sp. G pleopods from female H. fossamancinii H knobbed pores from coxal plate of male H. fossamancinii I details of inner margin of maxilla 2 from male H. fossamancinii J setae on peduncle of antenna 1 from female H. fossamancinii K pores on coxal plate from H. fatimae n.sp., arrow indicates the pore
FIGURE 1 in A new Hyalella species (Crustacea: Amphipoda: Hyalellidae) from South American Highlands (Argentina) with comments on its cuticular ultrastructure
FIGURE 1. Map showing distribution of Hyalella kochi, H. fossamancinii, H. puna and H. fatimae n. sp. in northwestern Argentina within a biogeographic scheme.
FIGURE 9 in A new Hyalella species (Crustacea: Amphipoda: Hyalellidae) from South American Highlands (Argentina) with comments on its cuticular ultrastructure
FIGURE 9. Types of setae as observed under SEM. A A1 and D1 setae from peduncle of antenna 2 of female H. fossamancinii, white box indicates the area enlarged in (B) B A1 seta C A1 seta from apex of antenna 2 of female H. fatimae n.sp., white box indicates the area enlarged in (D) D detail of lamellated shaft E A1 seta and T1 denticle from propodus of gnathopod 1 of male H. fatimae n.sp., white box indicates the area enlarged in (F) F A1 seta G seta and denticle on last segment of maxilliped palp from female H. fossamancinii H A1 seta from apex of uropod 3 of female H. fossamancinii I A 10 seta from coxal plate of male H. fatimae n.sp. J B2 seta from uropod 1 of female H. fatimae n.sp.
FIGURE 6. Hyalella fatimae n in A new Hyalella species (Crustacea: Amphipoda: Hyalellidae) from South American Highlands (Argentina) with comments on its cuticular ultrastructure
FIGURE 6. Hyalella fatimae n. sp., male holotype and female paratype. A male gnathopod 1 B male gnathopod 2 C female propodus of gnathopod 1 D female gnathopod 2. Scale bars: 0. 1 mm
Identification and characterization of epicuticular proteins of nematodes sharing motifs with cuticular proteins of arthropods
Specific collagens and insoluble proteins called cuticlins are major constituents of the nematode cuticles. The epicuticle, which forms the outermost electron-dense layer of the cuticle, is composed of another category of insoluble proteins called epicuticlins. It is distinct from the insoluble cuticlins localized in the cortical layer and the fibrous ribbon underneath lateral alae. Our objective was to identify and characterize genes and their encoded proteins forming the epicuticle. The combination between previously obtained laboratory results and recently made available data through the whole-genome shotgun contigs (WGS) and the transcriptome Shotgun Assembly (TSA) sequencing projects of Ascaris suum allowed us to identify the first epicuticlin gene, Asu-epic-1, on the chromosome VI. This gene is formed of exon1 (55 bp) and exon2 (1067 bp), separated by an intron of 1593 bp. Exon 2 is formed of tandem repeats (TR) whose number varies in different cDNA and genomic clones of Asu-epic-1. These variations could be due to slippage of the polymerases during DNA replication and RNA transcription leading to insertions and deletions (Indels). The deduced protein, Asu-EPIC-1, consists of a signal peptide of 20 amino acids followed by 353 amino acids composed of seven TR of 49 or 51 amino acids each. Three highly conserved tyrosine motifs characterize each repeat. The GYR motif is the Pfam motif PF02756 present in several cuticular proteins of arthropods. Asu-EPIC-1 is an intrinsically disordered protein (IDP) containing seven predicted molecular recognition features (MoRFs). This type of protein undergoes a disorder-to-order transition upon binding protein partners. Three epicuticular sequences have been identified in A. suum, Ascaris lumbricoides, and Toxocara canis. Homologous epicuticular proteins were identified in over 50 other nematode species. The potential of this new category of proteins in forming the nematode cuticle through covalent interactions with other cuticular components, particularly with collagens, is discussed. Their localization in the outermost layer of the nematode body and their unique structure render them crucial candidates for biochemical and molecular interaction studies and targets for new biotechnological and biomedical applications.
Data from: Ontogeny can provide insight into the roles of natural and sexual selection in cricket cuticular hydrocarbon evolution
<p>The often complex cocktails of hydrocarbon compounds found on the cuticles of insects can serve both naturally and sexually selected functions, contributing to an individual's ability to withstand water loss and attract mating partners. However, whether natural and sexual selection act synergistically or antagonistically on a species' cuticular hydrocarbon (CHC) profile remains unclear. Here we examined the ontogeny of the CHC profile in a species of cricket Teleogryllus oceanicus while manipulating humidity during development. We predicted that juvenile crickets should produce only those compounds that contribute to desiccation resistance, while those compounds contributing specifically to male attractiveness should be produced only at sexual maturity. Further, if attractive CHCs come at a cost to desiccation resistance as predicted by some models of sexual selection, then males reared under low humidity should be constrained to invest less in attractive CHCs. Crickets reared under low humidity produced more long chained methyl branched alkanes, alkenes and alkadienes than did crickets reared under high humidity. The abundance of n-alkanes was unaffected by humidity treatment. Sexual dimorphism in the CHC profile was not apparent until adult emergence and became exaggerated 10 days after emergence when crickets were sexually mature. Males produced more of the same compounds that were increased in both sexes under low humidity, but the humidity treatment did not interact with sex in determining CHC abundance. The data suggest that CHC profiles which protect crickets from desiccation might have synergistic effects on male attractiveness, as there was no evidence to suggest males trade-off a CHC profile produced in response to low humidity for one associated with sexual signalling.</p>
Fig. 1 in Cuticular Hydrocarbon Profile Analyses Help Clarify the Species Identity of Dry-Mounted Cuckoo Wasps (Hymenoptera: Chrysididae), Including Type Material, and Reveal Evidence for a Cryptic Species
Fig. 1. Adult female paratype of the cuckoo wasp Chrysis parabrevitarsis n. sp. (Germany, Rhineland-Palatinate, Bellheim, 10 June 2012; voucher ID: ZFMK-TIS-36479), Photograph: O. Niehuis.
Fig. 4 in Cuticular Hydrocarbon Profile Analyses Help Clarify the Species Identity of Dry-Mounted Cuckoo Wasps (Hymenoptera: Chrysididae), Including Type Material, and Reveal Evidence for a Cryptic Species
Fig. 4. Exemplar chromatograms showing diagnostic differences (specified inTables 1 and 2) between the cuticular hydrocarbon profiles of Chrysis parabrevitarsis n. sp. and Chrysis pseudobrevitarsis in the female (A) and male (B) sex. The x-axis represents the retention time shown in form of Kovats retention indices (Kováts 1958), the y-axis shows the total intensity of ions (TIC). Diagnostic alkenes are indicated with their Kovats retention index (Kováts 1958) in parentheses to differentiate them from alkenes with the same chain length but differing in the location of their double bond.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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