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27 results for “Sympetrum”
Fig. 2 in Confirmación de la emergencia de Sympetrum sinaiticum Dumont, 1977 (Odonata: Libellulidae) y entomofauna termófila acompañante en la provincia de Córdoba (España).
Fig. 2.- Olivar de la campiña cordobesa. a.- Canal de riego colonizado por macrófitos (quemados intencionadamente). b.- A la derecha, se aprecia infraestructura instalada en el terreno con el fin de captar agua de una poza cercana al canal de riego. (Fotos: M.A. Vega-Maqueda).
Fig. 3 in Nuevos datos sobre la distribución de Sympetrum flaveolum (Linnaeus, 1758) (Odonata: Libellulidae) en la provincia de León (Norte de España).
Fig. 3.- Sympetrum flaveolum, en Valle de Valmujín, Valsemana, Palacio de Valdellorma, 09.07.2019. Fotografía: Tomás Sanz.
Fig. 5 in Nuevos datos sobre la distribución de Sympetrum flaveolum (Linnaeus, 1758) (Odonata: Libellulidae) en la provincia de León (Norte de España).
Fig. 5.- Distribución actual de Sympetrum flaveolum en la provincia de León: - Círculos: datos procedentes de Biodiversidad Virtual. - Triángulos: datos procedentes del Atlas y Libro Rojo de los Invertebrados Amenazados de España. - Cuadrados: Datos inéditos aportados en el presente trabajo.
Risks for overwintering eggs of the dragonfly Sympetrum vicinum in aquatic and terrestrial environments
<p>Risk-spreading behaviour is often exhibited by animals as a response to unpredictably variable environments. Using field and laboratory studies, we tested the hypothesis that Sympetrum vicinum dragonflies spread the risks of winter environments by laying eggs across a terrestrial–aquatic gradient. Sympetrum vicinum eggs that overwintered in terrestrial and benthic-limnetic habitats had significantly higher hatching success compared with eggs that overwintered in littoral sites. Low success may have been caused by hypoxia due to excess sediment in the littoral samples in the lab. While hypoxia experienced under winter conditions (4°C) had no negative effect on hatching success, hatching in hypoxic and anoxic water significantly decreased hatching success. Opportunistic egg predation by a winter-active caddisfly significantly decreased egg hatching success. Because S. vicinum eggs have a relatively low supercooling point (− 26.25°C), freezing may not be a significant source of mortality in terrestrial or aquatic sites. By ovipositing in both terrestrial and aquatic environments, female dragonflies may be balancing the unpredictable risks of both the failure to inundate the eggs and egg predation. Our research highlights the potential for biotic interactions during winter to shape the behaviour and life-history of aquatic invertebrates.</p>
Fig. 1 in Primera cita de Sympetrum striolatum (Charpentier, 1840) (Odonata: Libellulidae) en la isla de Capri (Italia).
Fig. 1.- Acantilado en Capri (Italia), con Sympetrum striolatum en el centro. T
Fig. 1 in Nuevos datos sobre la distribución de Sympetrum flaveolum (Linnaeus, 1758) (Odonata: Libellulidae) en la provincia de León (Norte de España).
Fig. 1.- Sympetrum flaveolum, en Fresnedo de Valdellorma, 26.07.2016. Fotografía: Tomás Sanz.
Fig. 4 in Nuevos datos sobre la distribución de Sympetrum flaveolum (Linnaeus, 1758) (Odonata: Libellulidae) en la provincia de León (Norte de España).
Fig. 4.- Sympetrum flaveolum, en el Puerto de Panderrueda, 14.07.2019. Fotografía: Marian Pomeda.
Fig. 2 in Nuevos datos sobre la distribución de Sympetrum flaveolum (Linnaeus, 1758) (Odonata: Libellulidae) en la provincia de León (Norte de España).
Fig. 2.- Sympetrum flaveolum, en el Puerto de Panderrueda, 02.08.2018. Fotografía: Marian Pomeda.
Risks for overwintering eggs of the dragonfly Sympetrum vicinum in aquatic and terrestrial environments
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FIGURES 13–16 in Description of an endemic and endangered new Sympetrum species (Odonata: Libellulidae) from the subtropical area of Taiwan
FIGURES 13–16. Penes of Sympetrum. 13–15, lateral, upside down, 16 ventral. 13, S. hypomelas; 14, S. orientale; 15–16, S. b. baccha.
FIGURES 1–6. Sympetrum nantouensis. 1 in Description of an endemic and endangered new Sympetrum species (Odonata: Libellulidae) from the subtropical area of Taiwan
FIGURES 1–6. Sympetrum nantouensis. 1, holotype, male, lateral; 2, holotype, male, dorsal; 3, paratype female, dorsal; 4, paratype female, lateral; 5, Color patterns on the anterior side of pterothorax; 6, The main habitat of S. nantouensis in Yuchih, Nantou County, Taiwan.
FIGURES 7–12 in Description of an endemic and endangered new Sympetrum species (Odonata: Libellulidae) from the subtropical area of Taiwan
FIGURES 7–12. Male reproductive structures in Sympetrum. 7–11, S. nantouensis, 12, S. risi. 7, cerci, lateral; 8, male hamule, lateral, upside down; 9, penis, lateral, upside down; 10, penis, ventral; 11, penis, posterolateroventral; 12, penis, lateral.
Fig. 4 in Phylogeny of the dragonfly genus Sympetrum (Odonata: Libellulidae)
Fig. 4 Lateral views of representative Sympetrum male genitalia to identify coded morphological characters: a S. rubicundulum; b S. danae; c S. gracile. Labeled structures: CL central lobe; cor cornua;
Fig. 3 in Phylogeny of the dragonfly genus Sympetrum (Odonata: Libellulidae)
Fig. 3 Comparison of penis morphology across the Sympetrum species groups. a Danae group, S. uniforme; b flaveolum group, S. rubicundulum; c fonscolombii group, S. corruptum; d infuscatum group, S. risi; e pedemontanum group, S. pedemontanum; f vulgatum group, S. striolatum
FIGURE 3 in The genus Sympetrum Newman, 1833 in Thailand, with description of S. thailandensis sp. nov. (Odonata: Libellulidae)
FIGURE 3. General morphology of Sympetrum hypomelas, ♀; (a) habitus in lateral view; (b) head in dorsal view; (c) synthorax in lateral view; (d) anal appendages in lateral view; (e) anal appendages in dorsal view; (f) valvula vulvae (white outline) in ventral view.
FIGURE 9 in The genus Sympetrum Newman, 1833 in Thailand, with description of S. thailandensis sp. nov. (Odonata: Libellulidae)
FIGURE 9. Distribution map of Sympetrum spp. in Thailand; S. hypomelas (yellow triangle); S. thailandensis sp. nov. (purple circle).
FIGURE 2 in The genus Sympetrum Newman, 1833 in Thailand, with description of S. thailandensis sp. nov. (Odonata: Libellulidae)
FIGURE 2. General morphology of Sympetrum hypomelas, ♁; (a) secondary genitalia in lateral view; (b) vesica spermalis in lateral view; (c) vesica spermalis in oblique ventral view; (d) anal appendages in lateral view; (e) anal appendages in dorsal view; (f) anal appendages in ventral view.
FIGURE 8 in The genus Sympetrum Newman, 1833 in Thailand, with description of S. thailandensis sp. nov. (Odonata: Libellulidae)
FIGURE 8. Sympetrum thailandensis sp. nov. in life, males (a–b), females (c–d); (a) Hin Tung, Muang, Nakhon Nayok province, Thailand, 3-xi-2018 (photo by Noppadon Makbun); (b) same locality, 24-x-2018 (photo by Dennis Farrell); (c) same locality, 24-x-2018 (photo by Dennis Farrell); (d) same locality, 3-xi-2018 (photo by Noppadon Makbun).
FIGURE 5 in The genus Sympetrum Newman, 1833 in Thailand, with description of S. thailandensis sp. nov. (Odonata: Libellulidae)
FIGURE 5. General morphology of Sympetrum thailandensis sp. nov., holotype ♁; (a) secondary genitalia in lateral view; (b) vesica spermalis in lateral view; (c) vesica spermalis in ventral view; (d) anal appendages in lateral view; (e) anal appendages in dorsal view; (f) anal appendages in ventral view.
FIGURE 7 in The genus Sympetrum Newman, 1833 in Thailand, with description of S. thailandensis sp. nov. (Odonata: Libellulidae)
FIGURE 7. Sympetrum hypomelas in life, males (a–b), females (c–d); (a) Hin Tung, Muang, Nakhon Nayok province, Thailand, 26–vii–2020 (photo by Dennis Farrell); (b) same locality, 3–xi–2018 (photo by Noppadon Makbun); (c) same locality, 24–x–2018 (photo by Dennis Farrell); (d) same locality, 24–x–2018 (photo by Dennis Farrell).
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