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553 results for “damselflies”
FIGURES 5–6 in Matrona taoi spec. nov., a new damselfly species from northern Vietnam (Odonata: Calopterygidae)
FIGURES 5–6. Matrona taoi sp. nov. 5) wings of paratype male; 6) wings of paratype female.
FIGURE 2 in A re-description of the fossil damselfly Eolestes syntheticus Cockerell, 1940 (Odonata: Zygoptera: Eolestidae n. fam.) with description of new taxa from the Eocene of North America
FIGURE 2. Head and thorax of Eolestes syntheticus (holotype UCM 19170). Scale bar = 5 mm.
FIGURE 171 in New species of the damselfly genus Argia from Mexico, Central America and Ecuador with an emphasis on Costa Rica (Insecta: Odonata: Coenagrionidae)
FIGURE 171. Distribution of other species.
FIGURES 165–166 in New species of the damselfly genus Argia from Mexico, Central America and Ecuador with an emphasis on Costa Rica (Insecta: Odonata: Coenagrionidae)
FIGURES 165–166. Distribution of metallic species.
FIGURES 169–170 in New species of the damselfly genus Argia from Mexico, Central America and Ecuador with an emphasis on Costa Rica (Insecta: Odonata: Coenagrionidae)
FIGURES 169–170. Distribution of other species.
FIGURES 167–168 in New species of the damselfly genus Argia from Mexico, Central America and Ecuador with an emphasis on Costa Rica (Insecta: Odonata: Coenagrionidae)
FIGURES 167–168. Distribution of extranea-group species.
FIGURES 124–125 in New species of the damselfly genus Argia from Mexico, Central America and Ecuador with an emphasis on Costa Rica (Insecta: Odonata: Coenagrionidae)
FIGURES 124–125. Male wings, right pair.
FIGURES 73–79 in New species of the damselfly genus Argia from Mexico, Central America and Ecuador with an emphasis on Costa Rica (Insecta: Odonata: Coenagrionidae)
FIGURES 73–79. Color pattern of male S7–10 of other species, lateral view.
FIGURES 89–95 in New species of the damselfly genus Argia from Mexico, Central America and Ecuador with an emphasis on Costa Rica (Insecta: Odonata: Coenagrionidae)
FIGURES 89–95. Color pattern of female S7–10 of extranea-group species, lateral view.
FIGURES 53–62 in New species of the damselfly genus Argia from Mexico, Central America and Ecuador with an emphasis on Costa Rica (Insecta: Odonata: Coenagrionidae)
FIGURES 53–62. Color pattern of male S7–10 of metallic species, lateral view.
FIGURES 63–72 in New species of the damselfly genus Argia from Mexico, Central America and Ecuador with an emphasis on Costa Rica (Insecta: Odonata: Coenagrionidae)
FIGURES 63–72. Color pattern of male S7–10 of extranea-group species, lateral view.
Restricted X chromosome introgression and support for Haldane's rule in hybridizing damselflies
<p>Contemporary hybrid zones act as natural laboratories for the investigation of species boundaries and allow to shed light on the little understood roles of sex chromosomes in species divergence. Sex chromosomes are considered to function as a hotspot of genetic divergence between species; indicated by less genomic introgression compared to autosomes during hybridisation. Moreover, they are thought to contribute to Haldane's rule which states that hybrids of the heterogametic sex are more likely to be inviable or sterile. To test these hypotheses, we used contemporary hybrid zones of <i>Ischnura elegans</i>, a damselfly species that has been expanding its range into the northern and western regions of Spain, leading to chronic hybridization with its sister species <i>Ischnura graellsii</i>. We analysed genome-wide SNPs in the Spanish <i>I. elegans</i> and <i>I. graellsii</i> hybrid zone and found (i) that the X chromosome shows less genomic introgression compared to autosomes and (ii) that males are underrepresented among admixed individuals as predicted by Haldane's rule. This is the first study in Odonata that suggests a role of the X chromosome in reproductive isolation. Moreover, our data adds to the few studies on species with X0 sex determination system and contradicts the hypothesis that the absence of a Y chromosome causes exceptions to Haldane's rule.</p>
Negative body size-dependent resource allocation underlies conspicuous sexual ornaments in a territorial damselfly
<p><span><span><span><span><span><span><span><span><span><span><span>Sexual ornaments, signaling individual quality to choosing females or rival males, often show steeper body size scaling compared to non-sexually selected traits. Theory posits such steeper body size scaling is the result of differential resource allocation, reflecting trade-offs between different components of fitness. Yet the process of resource allocation towards body size-dependent sexual ornaments has been rarely understood empirically. Using the Neotropical territorial damselfly <i>Megaloprepus caerulatus</i>, whose males and females carry wax-based, sex-specific white wing bands and white wing tips respectively, we investigated nutrition sensitivity and body size scaling of both traits by manipulating larval food availability and directly quantified both the fat allocated to wing ornaments and the fat reserve from which allocations are made. Both color traits exhibited sensitivity to food availability during larval development and steeper body size scaling compared to control traits. Although the absolute amount of fat invested in developing the color ornaments increased with body size, the proportion of total fat allocated to the ornaments decreased with body size, making exaggerated ornaments less affordable for smaller individuals. Our data demonstrate that knowledge of affordability of exaggeration for resource-based sexual ornament, which requires measuring the resource pool from which ornaments are derived is essential for understanding the maintenance of honesty of sexual signals. </span></span></span></span></span></span></span></span></span></span></span></p>
Fig. 18 in A revision of the systematics and distribution of the damselfly genus Prodasineura Cowley, 1934 (Odonata: Zygoptera: Platycnemididae) in Vietnam with description of two new species
Fig. 18. Distribution map of Prodasineura Cowley, 1934 spp. in Vietnam (orange group species). (●) P. croconota Ris, 1916. (●) P. verticalis Selys, 1860. (●) Prodasineura kong sp. nov. (●) P. lancastrei sp. nov.
Fig. 16 in A revision of the systematics and distribution of the damselfly genus Prodasineura Cowley, 1934 (Odonata: Zygoptera: Platycnemididae) in Vietnam with description of two new species
Fig. 16. Habitat of Prodasineura Cowley, 1934 spp. in Vietnam. A. Gia Trang stream in Chu Mom Ray National Park, home of P. doisuthepensis Hoess, 2007 and P. verticalis Selys, 1860. B. Typical stream where P. lancastrei sp. nov., P. autumnalis (Fraser, 1922) and P. croconota Ris, 1916 occur, in Pu Mat National Park. C. Open limestone stream in Tan Hoa Commune, Minh Hoa District of Quang Binh Province with three species: P. autumnalis, P. kong sp. nov. and P. coerulescens (Fraser, 1932) coexisting. D. Habitat of P. hoffmanni Kosterin, 2015 and P. autumnalis in Mang Canh, Kon Plong District of Kon Tum Province.
Fig. 11. Prodasineura Cowley, 1934 spp., female paratypes. A, C, E. P in A revision of the systematics and distribution of the damselfly genus Prodasineura Cowley, 1934 (Odonata: Zygoptera: Platycnemididae) in Vietnam with description of two new species
Fig. 11. Prodasineura Cowley, 1934 spp., female paratypes. A, C, E. P. kong sp. nov., ZCDTU 2019071817-ODO. B, D, F. P. lancastrei sp. nov., ZCDTU 2019051217-ODO. A–B = head and thorax, lateral view; C–D = abdominal tip, dorsal view; E–F = abdominal tip, lateral view. Images not to scale.
FIGURE 8 in The damselfly genus Megaloprepus (Odonata: Pseudostigmatidae): Revalidation and delimitation of species-level taxa including the description of one new species
FIGURE 8. Lateral views of the male caudal appendices. The scale bar indicates 0.1 cm.
FIGURE 1. Fossil locality. A in A new calopterygid damselfly (Odonata, Zygoptera) from the Oligocene Ningming Basin, Guangxi, South China
FIGURE 1. Fossil locality. A, Map of fossil locality. B, Photograph of fossil collecting.
Figure 6 from: Kipping J, Clausnitzer V, Elizalde SRF, Dijkstra K-DB (2017) The dragonflies and damselflies (Odonata) of Angola. African Invertebrates 58(1): 65-91. https://doi.org/10.3897/AfrInvertebr.58.11382
Figure 6 - Photographs of Angola's endemic a Angola Dancing Jewel (Platycypha angolensis) and b Angola Micmac (Micromacromia flava) (K.D. Dijkstra).
Figure 5 from: Kipping J, Clausnitzer V, Elizalde SRF, Dijkstra K-DB (2017) The dragonflies and damselflies (Odonata) of Angola. African Invertebrates 58(1): 65-91. https://doi.org/10.3897/AfrInvertebr.58.11382
Figure 5 - Photographs of some of Angola's (near) endemic dragonflies and damselflies. a Angola Sparklewing (Umma femina) b Highland Blue Jewel (Platycypha bamptoni) c Angola Blue Jewel (Platycypha crocea) d Blue Wisp (Agriocnemis angolensis) e Sarep Sprite (Pseudagrion sarepi) f Estes's Sprite (Pseudagrion estesi) g Angola Sprite (Pseudagrion angolense) h Sunrise Firebelly (Eleuthemis eogaster) (a S. Fernandes Elizalde b–f J. Kipping g W. Tarboton, h K.D. Dijkstra).
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.