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553 results for “damselflies”
FIGURE 2 in The damselfly genus Mecistogaster (Odonata: Pseudostigmatidae) from the Brazilian Atlantic Forest with a description of three new species and a neotype designation for M. amalia (Burmeister, 1839)
FIGURE 2. Distribution map of species of Mecistogaster recorded in the Brazilian Atlantic Forest. Abbreviations for Brazilian States: Alagoas (AL), Bahia (BA), Espírito Santo (ES), Minas Gerais (MG), Paraná (PR), Paraíba (PB), Pernambuco (PE), Rio de Janeiro (RJ), Rio Grande do Sul (RS), Santa Catarina (SC), São Paulo (SP).
FIGURE 1 in The damselfly genus Mecistogaster (Odonata: Pseudostigmatidae) from the Brazilian Atlantic Forest with a description of three new species and a neotype designation for M. amalia (Burmeister, 1839)
FIGURE 1. Penis of Mecistogaster (neotype M. amalia) in lateral view: aif—apex of inner fold; f—flagellum; pll—plate-like lateral lobe; s—spine; tf—terminal fold.
FIGURES 4–7 in The damselfly genus Mecistogaster (Odonata: Pseudostigmatidae) from the Brazilian Atlantic Forest with a description of three new species and a neotype designation for M. amalia (Burmeister, 1839)
FIGURES 4–7. Males of Atlantic Forest species of Mecistogaster. (4) Mecistogaster amalia, specimen compared with neotype: head in dorso-anterior view; (5–6) Mecistogaster mielkei sp. nov., holotype: (5) prothorax in dorsal view; paratype: (6) pterothorax in ventral view; Mecistogaster kesselringi sp. nov., paratype: (7) pterothorax in ventral view.
FIGURES 19–22 in The damselfly genus Mecistogaster (Odonata: Pseudostigmatidae) from the Brazilian Atlantic Forest with a description of three new species and a neotype designation for M. amalia (Burmeister, 1839)
FIGURES 19–22. Males of Atlantic Forest species of Mecistogaster. (19–20) Mecistogaster mielkei sp. nov., paratype: (19) penis in ectal view, (20) penis in lateral view [with flagellum broken]; (21–22) Mecistogaster kesselringi sp. nov., paratype: (21) penis in ectal view, (22) penis in lateral view [part of flagellum cut to fit the image].
FIGURES 11–16 in The damselfly genus Mecistogaster (Odonata: Pseudostigmatidae) from the Brazilian Atlantic Forest with a description of three new species and a neotype designation for M. amalia (Burmeister, 1839)
FIGURES 11–16. Atlantic Forest species of Mecistogaster. (11–14) Mecistogaster kesselringi sp. nov., holotype ♁: (11) forew- ing, (12) hindwing; paratype ♀: (13) forewing, (14) hindwing; (15–16) Mecistogaster amalia, first described ♀: (15) forewing, (16) hindwing.
Fig. 1 a–d in Africa's smallest damselfly-a new Agriocnemis from Namibia (Odonata: Coenagrionidae)
Fig. 1 a–d Agriocnemis bumhilli sp. n.—holotype male. a Prothorax and thorax, lateral view. b Distal portion of abdomen, dorsal view. c Appendages, posterior view. d Distal portion of abdomen, lateral view. Drawings by Ole Müller
Fig. 9 in Phylogeny, classification and taxonomy of European dragonflies and damselflies (Odonata): a review
Fig. 9 Phylogeny of Sympetrum, based on Pilgrim (2006, 2012) and Pilgrim and von Dohlen (2008). Norwegian S. nigrescens and Himalayan S. commixtum are included with S. striolatum following Pilgrim and von Dohlen (2007); Japanese S. frequens with S. depressiusculum following Sawabe et al. (2004). Monophyletic non-European groups not given in detail; three larger groups are detailed on right. The taxa occur in the Eastern Palaearctic and adjacent Oriental Region (EP), Nearctic (NA), Neotropics (NT), entire Palaearctic (PA), Palaeotropics (PT) or Western Palaearctic (WP). Bold species occur in Europe; species classified in subgenus Tarnetrum (* type species) are indicated
Fig. 7 in Phylogeny, classification and taxonomy of European dragonflies and damselflies (Odonata): a review
Fig. 7 Phylogeny of Libellula (sensu lato), based on molecular data (a, after Artiss et al. 2001; Kambhampati and Charlton 1999) and morphology (b, after Carle and Kjer 2002). B. (Belonia), Eu. (Eurothemis), La. (Ladona), Li. (Libellula sensu stricto) and N. (Neotetrum) are
Fig. 4 in Phylogeny, classification and taxonomy of European dragonflies and damselflies (Odonata): a review
Fig. 4 Inferred phylogeny of global families (a; line thickness is indicative of species diversity; European taxa in bold font) and European genera of Anisoptera (b; see Fig. 6 for details of Libellulidae), based principally on Bybee et al. (2008), as well as Fleck et al. (2008b),
Fig. 3 in Phylogeny, classification and taxonomy of European dragonflies and damselflies (Odonata): a review
Fig. 3 Inferred phylogeny of Ischnura (I.), Enallagma (E.) and associated genera based on preliminary genetic data (Chippindale et al. 1999; Turgeon et al. 2005; Hovmöller 2006; Dumont et al. 2009). Unresolved potentially paraphyletic groups are indicated with broad lines, and known numbers of species in each group are given. The taxa occur in the Nearctic (NA), Neotropics (NT), Palaearctic (PA and bold font) or Palaeotropics (PT). Sampling is very incomplete in Ischnura and the presented hypothesis is therefore tentative. The relationships of numerous (especially Neotropical) ischnurines are unknown, although Hovmöller (2006) found his selection to form the sister group of the assemblage presented here
Fig. 1 in Phylogeny, classification and taxonomy of European dragonflies and damselflies (Odonata): a review
Fig. 1 Inferred phylogeny of global families (a, line thickness is indicative of species diversity, European taxa in bold font) and European genera of Zygoptera (b), based on Bybee et al. (2008), Carle et al. (2008), Dumont et al. (2009) and other sources cited in the text. These
Fig. 2 in Phylogeny, classification and taxonomy of European dragonflies and damselflies (Odonata): a review
Fig. 2 Phylogeny of European Lestidae, based on molecular data (Dumont et al. 2009; Gyulavári et al. 2011), S. paedisca is placed by default, being the only other European Sympecma species. C. (Chalcolestes), L. (Lestes) and S. (Sympecma) are abbreviations of genera
Fig. 5 in Phylogeny, classification and taxonomy of European dragonflies and damselflies (Odonata): a review
Fig. 5 Phylogeny of Aeshna, Anax and associated genera based on morphology (after von Ellenrieder 2002, 2003). Only bold genera were recognised before the 1990s, the remainder of species being retained in Aeshna (sensu lato). Unresolved paraphyletic groups are indicated with broad lines, and approximate numbers of species in each group are given. The taxa occur in the Afrotropics (AT), Australia (AU), Nearctic (NA), Neotropics (NT), Palaearctic (PA) or Palaeotropics (PT)
Data from: Cannibalism and activity rate in larval damselflies increase along a latitudinal gradient as a consequence of time constraints
Background: Predation is ubiquitous in nature. One form of predation is cannibalism, which is affected by many factors such as size structure and resource density. However, cannibalism may also be influenced by abiotic factors such as seasonal time constraints. Since time constraints are greater at high latitudes, cannibalism could be stronger at such latitudes, but we know next to nothing about latitudinal variation in cannibalism. In this study, we examined cannibalism and activity in larvae of the damselfly Lestes sponsa along a latitudinal gradient across Europe. We did this by raising larvae from the egg stage at different temperatures and photoperiods corresponding to different latitudes. Results: We found that the more seasonally time-constrained populations in northern latitudes and individuals subjected to greater seasonal time constraints exhibited a higher level of cannibalism. We also found that activity was higher at north latitude conditions, and thus correlated with cannibalism, suggesting that this behaviour mediates higher levels of cannibalism in time-constrained animals. Conclusions: Our results go counter to the classical latitude-predation pattern which predicts higher predation at lower latitudes, since we found that predation was stronger at higher latitudes. The differences in cannibalism might have implications for population dynamics along the latitudinal gradients, but further experiments are needed to explore this.
Phenotypic variation in male Calopteryx splendens damselflies: The role of wing pigmentation and body size in thermoregulation
<p class="ListParagraph1">For an ectothermic insect, its color and size are important determinants of body temperature: dark colors absorb heat more efficiently, while larger bodies require more heat to reach a certain temperature. These dark colors are expressed using melanin, which has been intimately linked with an insect's thermoregulatory capabilities. Melanin is also linked with immune defense and is often used as a secondary sexual character in insects. There is a potential trade-off situation between thermoregulatory capabilities, immune defence and secondary sexual characters, all of which use melanin. Some <i>Calopteryx</i> damselflies, such as <i>Calopteryx splendens</i>, have melanin-based wing pigmentation that is sexually selected and drives intra- and interspecific territorial aggressions. Our goal was to experimentally study how the wing pigmentation and body size of <i>C. splendens</i> males affect their thermoregulation and especially their ability to become active after being cooled down. Our results are in line with our hypotheses showing that (<i>i</i>) individuals with larger wing spots had significantly faster activation times than those with smaller wing spots, and (<i>ii</i>) individuals with larger body size had significantly slower activation times than those with smaller body size. Both variables showed an interaction and thus are important in damselfly warm up and activation. We discuss the role wing pigmentation and thermoregulation can have on the behavioral patterns observed in <i>Calopteryx</i> species.</p>
FIGURE 5 in Behavioural impacts on the taphonomy of dragonflies and damselflies (Odonata) from the Lower Cretaceous Crato Formation, Brazil
FIGURE 5. Pie charts showing abdominal completeness of Crato Formation Odonate versus other insect orders. A, Pie chart showing the number and percentage of odonate insect fossils examined with varying levels of abdomen preservation. The percentage is of odonates only, not the entire collection examined. B, Pie chart showing the number and percentage of non-odonate insect fossils examined with varying levels of abdomen preservation. The percentage is of non-odonates only, not the entire collection examined.
FIGURE 4 in Behavioural impacts on the taphonomy of dragonflies and damselflies (Odonata) from the Lower Cretaceous Crato Formation, Brazil
FIGURE 4. Principal coordinate analyses of the collection studies. Odonate specimens are connected with a red overlay. Nonodonate specimens are connected with a blue overlay. A, Including both anterior and posterior abdomen characters. B, With the anterior and posterior abdomen characters combined into a single abdomen character. C, Including both anterior and posterior abdomen characters, however three odonate and six non-odonate outliers are excluded in the overlain colours. D, With the anterior and posterior abdomen characters combined into a single abdomen character however two odonate and six non-odonate outliers are excluded in the overlain colours. All analyses use Gower similarity coefficient. Red = Odonata; blue = Blattodea; green = Orthoptera; light blue = Coleoptera; purple = Diptera; light green = Ephemeroptera; black = Hemiptera; yellow = Hymenoptera; orange = Neuroptera; pink = Raphidioptera; grey = Unknown.
FIGURE 2 in Behavioural impacts on the taphonomy of dragonflies and damselflies (Odonata) from the Lower Cretaceous Crato Formation, Brazil
FIGURE 2. Principal coordinate analyses of Crato Formation fossil insect collections studied, clustering specimens based on their completeness. A, Principal coordinate analysis of the collections studied, including both anterior and posterior abdomen characters. B, Principal coordinate analysis of the collections studied, with the anterior and posterior abdomen characters combined into a single abdomen character. Both use Gower similarity coefficient. Red = Odonata; blue = Blattodea; green = Orthoptera; light blue = Coleoptera; purple = Diptera; light green = Ephemeroptera; black = Hemiptera; yellow = Hymenoptera; orange = Neuroptera; pink = Raphidioptera; grey = Unknown.
FIGURE 2 in First argiolestid damselfly (Odonata: Zygoptera) from the late Palaeocene of Northwest Argentina
FIGURE 2. Details of the wing of Librelula maradoniana gen. et sp. nov., Holotype MLP 29425 from El Fuerte (Jujuy, Argentina); late Palaeocene. A, Arculus. B, Emergence of CuP+AA. C, Nodus. D, Pterostigma.
FIGURE 3 in A new species of the ʻprotozygopteranʼ damselfly (Odonata: Permagrionidae) from the Lower-Middle Permian of Russia
FIGURE 3. Epilestes rasnitsyni sp. nov., holotype GGM-1844-02/BP-12885. Tracing of right forewing; Scale bar = 5 mm.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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