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437 results for “morphological variability”
Figure 3 in Morphological variability of the megalopa of Liocarcinus depurator (Brachyura: Portunidae) in Mediterranean and Atlantic populations
Figure 3. Liocarcinus depurator, megalopa. Maxilla. Scale bar: 0.2 mm.
Figure 4 in Morphological variability of the megalopa of Liocarcinus depurator (Brachyura: Portunidae) in Mediterranean and Atlantic populations
Figure 4. Liocarcinus depurator, megalopa. First maxilliped. Scale bar: 0.2 mm.
Figure 6 in Morphological variability of the megalopa of Liocarcinus depurator (Brachyura: Portunidae) in Mediterranean and Atlantic populations
Figure 6. Liocarcinus depurator, megalopa. Third maxilliped. Scale bar: 0.2 mm.
Figure 38 in Morphological variability and evaluation of taxonomic characters in the genus Erythemis Hagen, 1861 (Odonata: Libellulidae: Sympetrinae)
Figure 38. Erythemis vesiculosa distribution map.
Figure 29 in Morphological variability and evaluation of taxonomic characters in the genus Erythemis Hagen, 1861 (Odonata: Libellulidae: Sympetrinae)
Figure 29. Erythemis attala distribution map.
Figure 33 in Morphological variability and evaluation of taxonomic characters in the genus Erythemis Hagen, 1861 (Odonata: Libellulidae: Sympetrinae)
Figure 33. Erythemis haematogastra distribution map.
Figure 34 in Morphological variability and evaluation of taxonomic characters in the genus Erythemis Hagen, 1861 (Odonata: Libellulidae: Sympetrinae)
Figure 34. Erythemis mithroides distribution map.
Figure 37 in Morphological variability and evaluation of taxonomic characters in the genus Erythemis Hagen, 1861 (Odonata: Libellulidae: Sympetrinae)
Figure 37. Erythemis simplicicollis distribution map.
Figure 36 in Morphological variability and evaluation of taxonomic characters in the genus Erythemis Hagen, 1861 (Odonata: Libellulidae: Sympetrinae)
Figure 36. Erythemis plebeja distribution map.
Figure 35 in Morphological variability and evaluation of taxonomic characters in the genus Erythemis Hagen, 1861 (Odonata: Libellulidae: Sympetrinae)
Figure 35. Erythemis peruviana distribution map.
Figure 31 in Morphological variability and evaluation of taxonomic characters in the genus Erythemis Hagen, 1861 (Odonata: Libellulidae: Sympetrinae)
Figure 31. Erythemis collocata distribution map.
Figure 30 in Morphological variability and evaluation of taxonomic characters in the genus Erythemis Hagen, 1861 (Odonata: Libellulidae: Sympetrinae)
Figure 30. Erythemis carmelita distribution map.
Perl et al 2022 Substantial variability in morphological scaling among bumblebee colonies
<p>Data and R code for the submitted manuscript Perl et al 2021 Substantial variability in morphological scaling among bumblebee colonies</p>
Fig. 1 in Brooding behaviour of the centipede Otostigmus spinosus Porat, 1876 (Chilopoda: Scolopendromorpha: Scolopendridae) and its morphological variability in Thailand
Fig. 1. Distribution of Otostigmus spinosus Porat, 1876 in southern Thailand.
Fig. 4 in Brooding behaviour of the centipede Otostigmus spinosus Porat, 1876 (Chilopoda: Scolopendromorpha: Scolopendridae) and its morphological variability in Thailand
Fig. 4. Schematic of brooding behaviour of Otostigmus spinosus.
Data from: Phylogeography and classification of Dusty Miller (Spyridium parvifolium; Rhamnaceae): a morphologically variable shrub from south-east Australia
<p class="Paragraph"><em><span>Spyridium parvifolium</span></em><span> is a widespread and morphologically variable shrub from south-eastern Australia. Several varieties have been recognised and there is disagreement on the accepted taxonomy between Australian states. This study investigated the phylogeography of the species and assessed genetic distinctiveness of its morphological variants. Nuclear ribosomal DNA and complete chloroplast genomes from seventy-three samples of <em>S. parvifolium</em> and seven samples from closely related species were sequenced and analysed using</span> <span>both Bayesian and Maximum Likelihood phylogenetic methods. The results showed incongruence in the placement of several associated taxa (<em>S. cinereum</em>, <em>S. obcordatum </em>and <em>S. daltonii</em>), plausibly due to long-branch attraction, introgression or incomplete lineage sorting. <em>Spyridium parvifolium</em> was resolved as paraphyletic in both phylogenies, with accessions from west of the Murray Darling Depression divergent from those east of the Depression. We found evidence of isolation within <em>S. parvifolium</em> on the inland side of the Great Dividing Range, and recent gene-flow across Bass Strait. The variants of <em>S. parvifolium</em> were not supported as genetically distinct and, with the prevalence of several variants at single sites and morphological intergrades between variants, we conclude that the taxon is a single, morphologically variable species and that no infraspecific classification is warranted.</span></p>
FIG. 2 in Oospore features among morphologically similar and closely related charophyte species: consistency and variability
FIG. 2. — Oospore parameters. Abbreviations: see Material and methods. Scale bar: 200 µm.
FIG. 1 in Oospore features among morphologically similar and closely related charophyte species: consistency and variability
FIG. 1. — Localities investigated in this study. Abbreviations: see Material and methods.
Morphological variability decreases in populations living in less suitable environments and close to the range edges
<p><strong>Aim:</strong> Geographic range expansion depends on ecological and evolutionary processes that may hamper local adaptations in populations living at range edges by constraining phenotypic variability. This study investigates the spatial patterns of the intraspecific variability of skull traits throughout the geographic range of a marsupial from the Brazilian Atlantic Forest. We aimed to answer whether the distance from the range edge and the environmental suitability explain the geographic variation of morphological variability of the species.</p> <p><strong>Location:</strong> Atlantic Forest, Brazil.</p> <p><strong>Taxon:</strong> <em>Marmosops incanus</em> (Didelphimorphia, Didelphidae).</p> <p><strong>Methods:</strong> We analysed adult specimens deposited in the main biological collections in southeastern Brazil. The morphological variability extent and integration within populations were characterised by 13 linear measures of the skull, using a multivariate approach. Environmental suitability for the species' occurrence was estimated by Ecological Niche Models, using climatic and vegetation productivity as predictors and three different modelling methods. Distance from the range edge was calculated based on the minimum linear distance between populations and the closest range limit. We fitted linear regressions and selected the best models that explained the spatial variation of morphological variability based on the Akaike information criterion.</p> <p><strong>Results:</strong> The extent of morphological variability of <em>M. incanus</em> is positively correlated with morphological integration and increases with local environmental suitability and distance from the range edges. However, the relationship between morphological variability and environmental suitability depends on the niche modelling method.</p> <p><strong>Main conclusions: </strong>Unfavourable environmental conditions constrain morphological variability within populations of the Gray slender opossum and may hamper local adaptation in peripheral populations living in less suitable environments. In addition to environmental conditions, geographic location of populations also plays an important role in phenotypic variability among populations. We stress the boundary effect of the species range on the local adaptation of peripheral populations and its possible consequences for the range expansion dynamics.</p>
Supplementary data for Contribution of reproductive developmental gene diversity to the morphological variability of panicle in African rice
<p> </p> <p>African rice, <em>Oryza glaberrima</em> Steud., is a crop closely related to Asian rice (Oryza sativa L.) and represents a valuable resource for enhancing biotic and abiotic resistance properties in rice cultivation. Despite extensive research on the genetic basis of panicle architecture in O. sativa, our understanding of the molecular genetic factors governing this essential trait in <em>O. glaberrima</em> remains limited. Furthermore, there is a significant knowledge gap regarding the intra- and inter-specific diversity of panicle development and architecture in relation to the domestication of rice species. To bridge these gaps, our study employed a comprehensive approach, including in silico analyses, candidate gene-based association analysis, genome-wide association analysis, and analysis of structural variants (SVs) present in GWAS sites. The findings of this study significantly contribute to our understanding of the molecular genetic factors underlying rice panicle development and architecture. Furthermore, they provide promising targets for future efforts to improve the panicle morphological traits of this essential crop.</p>
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Allen Brain Atlas
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