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223 results for “Libellulidae”
Figures 10–17 in Morphological variability and evaluation of taxonomic characters in the genus Erythemis Hagen, 1861 (Odonata: Libellulidae: Sympetrinae)
Figures 10–17. Discrete characters of vulvar lamina, abdominal appendages, thorax, and femur. Numbers represent the following species: 10) E. peruviana female; 11) E. plebeja female; 12) E. simplicicollis male; 13) E. mithroides male; 14) E. vesiculosa male; 15) E. peruviana female; 16) E. vesiculosa female, 17) E. attala male. Abbreviations indicate the following characters, S 8 -S 9: Abdominal segments 8-9; LV: Vulvar lamina; Pb: Posterior border; Vt: Teeth ventral; Ai: Inferior appendage; As: Antehumeral stripe.
Figures 4–9. Morphometric characters. 4 in Morphological variability and evaluation of taxonomic characters in the genus Erythemis Hagen, 1861 (Odonata: Libellulidae: Sympetrinae)
Figures 4–9. Morphometric characters. 4) S1-3 of E. carmelita male, 5-6) E. simplicicollis male; 7) E. peruviana female; 8) FW of E. vesiculosa male; 9) E. simplicicollis male. Abbreviations indicate the following characters, LFW, LHW: FW or HW length; Lnpt: Nodus-pterostigma length; Antr: Triangle width; Lar: Arculus-second antenodal length; Lba: wing base-arculus length; Lban: Wing base-nodus length; Anpt: Pterostigma width; Lopt: Pterostigma length; Ansbt: Subtriangle width; Acd: HW discoidal field posterior border width; Anb: HW base width; Lasa-ca: Supplementary anal vein-Cu-A crossvein, Lab: Abdomen length; Las: Cercus length; Ddas: reach of teeth on ventral region of cercus; Anas: Anterolateral width of cercus; S: Abdominal segment 3; LclS3: Lateral carina length; LcaS3: 3 Apical carina length; Lecv: Ventral carina length; Lecv-clS3: Basal area between ventral-lateral carinae on S3; Wm: Width medial region of the abdominal segment; S 8: Abdominal segment 8; S 9: Abdominal segment 9; Lal: Female lamina length from base of basal lobe to apex.
Figures 18–25 in Morphological variability and evaluation of taxonomic characters in the genus Erythemis Hagen, 1861 (Odonata: Libellulidae: Sympetrinae)
Figures 18–25. Discrete characters of vesica spermalis. Numbers represent the following species: 18) E. mithroides, dorsal view; 19) E. carmelita, left side view; 20) E. vesiculosa, left side view; 21) E. peruviana, left side view; 22) E. credula, dorsal wiew; 23) E. haematogastra, right side view; 24) E. credula, finger-shaped structures, dorsal view; 25) E. plebeja, dorsal view. Abbreviations indicate the following characters, C: Cornua; L: Lateral lobe; H: Hook; Pb: Posterior border; M: Medial lobe; P: Posterior lobe; NH: Hook not bilobed.
What you sample is what you get: ecomorphological variation in Trithemis (Odonata, Libellulidae) dragonfly wings reconsidered
Abstract Background The phylogenetic ecology of the Afro-Asian dragonfly genus Trithemis has been investigated previously by Damm et al. (in Mol Phylogenet Evol 54:870–882, 2010) and wing ecomorphology by Outomuro et al. (in J Evol Biol 26:1866–1874, 2013). However, the latter investigation employed a somewhat coarse sampling of forewing and hindwing outlines and reported results that were at odds in some ways with expectations given the mapping of landscape and water-body preference over the Trithemis cladogram produced by Damm et al. (in Mol Phylogenet Evol 54:870–882, 2010). To further explore the link between species-specific wing shape variation and habitat we studied a new sample of 27 Trithemis species employing a more robust statistical test for phylogenetic covariation, more comprehensive representations of Trithemis wing morphology and a wider range of morphometric data-analysis procedures. Results Contrary to the Outomuro et al. (in J Evol Biol 26:1866–1874, 2013) report, our results indicate that no statistically significant pattern of phylogenetic covariation exists in our Trithemis forewing and hindwing data and that both male and female wing datasets exhibit substantial shape differences between species that inhabit open and forested landscapes and species that hunt over temporary/standing or running water bodies. Among the morphometric analyses performed, landmark data and geometric morphometric data-analysis methods yielded the worst performance in identifying ecomorphometric shape distinctions between Trithemis habitat guilds. Direct analysis of wing images using an embedded convolution (deep learning) neural network delivered the best performance. Bootstrap and jackknife tests of group separations and discriminant-function stability confirm that our results are not artifacts of overtrained discriminant systems or the "curse of dimensionality" despite the modest size of our sample. Conclusion Our results suggest that Trithemis wing morphology reflects the environment's "push" to a much greater extent than phylogeny's "pull". In addition, they indicate that close attention should be paid to the manner in which morphologies are sampled for morphometric analysis and, if no prior information is available to guide sampling strategy, the sample that most comprehensively represents the morphologies of interest should be obtained. In many cases this will be digital images (2D) or scans (3D) of the entire morphology or morphological feature rather than sparse sets of landmark/semilandmark point locations.
Abb. 7. Entwicklung der Orthetrum coerulescens-Population des Chuderriets von 2010 bis 2019 in Als Larvenhabitate von Orthetrum coerulescens (Odonata: Libellulidae) im Hinblick auf sporadische Sommertrockenheit optimierte Flachmoorgräben
Abb. 7. Entwicklung der Orthetrum coerulescens-Population des Chuderriets von 2010 bis 2019. Ausgezählt wurden die Grabenabschnitte (Strecken) 1–5 bei insgesamt 113 Kontrollgängen (K) jeweils während der Schlupf- und Flugperiode. BS = Anzahl besiedelte Grabenstrecken, RS =Anzahl Grabenstrecken mit Reproduktionsnachweisen, M × ⅒ = Anzahl territoriale Männchen mal 10–1.
Abb. 5. Grabenabschnitt 2 unterhalb Stau S2 in Als Larvenhabitate von Orthetrum coerulescens (Odonata: Libellulidae) im Hinblick auf sporadische Sommertrockenheit optimierte Flachmoorgräben
Abb. 5. Grabenabschnitt 2 unterhalb Stau S2 mit leicht fliessendem Wasser über steinigem Grund. 26.08.2019. Links: Oberflächenwasser abfliessend (Normalzustand). Rechts: oberflächlich trocken (Ausnahmezustand). 18.07.2018. (Fotos Hansruedi Wildermuth)
Abb. 2 in Als Larvenhabitate von Orthetrum coerulescens (Odonata: Libellulidae) im Hinblick auf sporadische Sommertrockenheit optimierte Flachmoorgräben
Abb. 2. Zwei Typen von Stauwehren in den Gräben des Chuderriets. Links: Stauwehr S4. Einfache Holzkonstruktion mit rundem Plastikpfropf zum Wasserablass. Rechts: Stauwehr S3. Metallkonstruktion mit demontierbarer Platte. Steine unter dem Wehr verhindern die Auskolkung des Gewässergrundes bei verstärktem Wasserabfluss. Die Rostfarbe beruht auf natürlichen Eisenausfällungen im Wasser. 30.03.2017. (Fotos Hansruedi Wildermuth)
Abb. 3. Grabenabschnitt 3 in Als Larvenhabitate von Orthetrum coerulescens (Odonata: Libellulidae) im Hinblick auf sporadische Sommertrockenheit optimierte Flachmoorgräben
Abb. 3. Grabenabschnitt 3, Sommeraspekt, Ufer einseitig gemäht. Links: wassergefüllt (Normalzustand). 05.07.2019. Rechts: ohne Oberflächenwasser, mit vertrockneter Chara-Schicht über feuchtem Bodensatz (Ausnahmezustand). 18.7.2018. (Fotos Hansruedi Wildermuth)
Abb. 1 in Als Larvenhabitate von Orthetrum coerulescens (Odonata: Libellulidae) im Hinblick auf sporadische Sommertrockenheit optimierte Flachmoorgräben
Abb. 1. Chuderriet mit Grabensystem (blaue Linien) bestehend aus den Abschnitten 1–6. S1–S5 bezeichnen die Stellen mit Stauwehr. Abschnitt (6) unterscheidet sich strukturell von den übrigen Gräben und wurde nicht in die Untersuchung einbezogen. (Luftbild: swisstopo / GIS-ZH)
Abb. 6 in Als Larvenhabitate von Orthetrum coerulescens (Odonata: Libellulidae) im Hinblick auf sporadische Sommertrockenheit optimierte Flachmoorgräben
Abb. 6. Libellen der kurzen Fliesswasserstellen im Grabensystem des Chuderriets. Links: Ein Männchen von Calopteryx virgo wartet über dem Rinnsal auf Weibchen. 02.06.2016. Rechts: Ein Männchen von Cordulegaster boltonii hat sich nach Patrouillenflug entlang einer Grabenstrecke an deren Rand gesetzt. 23.07.2019. (Fotos Hansruedi Wildermuth)
Fig. 5 in Nannophya koreana sp. nov. (Odonata: Libellulidae): A new dragonfly species previously recognized in Korea as the endangered pygmy dragonfly Nannophya pygmaea Rambur
Fig. 5. Phylogenetic tree based on 32 mitochondrial COI gene sequences of the Nannophya pygmaea species group from nine regions in Northeast and Southeast Asia. Sequences generated by the present study are shown in bold. Branch values indicate neighbor-joining (NJ) and maximum likelihood (ML) bootstrap support values, respectively. Tree topology and branch lengths reflect the results of NJ analysis. Asterisks (*) indicate branches not supported by ML analysis, and dashes (-) indicate support values of less than 50.
Fig. 3 in Nannophya koreana sp. nov. (Odonata: Libellulidae): A new dragonfly species previously recognized in Korea as the endangered pygmy dragonfly Nannophya pygmaea Rambur
Fig. 3. Nannophya koreana habitat in Mungyeong, Gyeongsangbuk-do, Korea (A-E): A. landscape of abandoned rice field; B. habitat with abundant aquatic plants (Persicaria thunbergii); C. male adult at habitat; D. female adult at habitat; E. immature male adult at habitat; F. nymph (from Muuido, Incheon, Korea).
Fig. 2 in Nannophya koreana sp. nov. (Odonata: Libellulidae): A new dragonfly species previously recognized in Korea as the endangered pygmy dragonfly Nannophya pygmaea Rambur
Fig. 2. Nannophya pygmaea: A. male adult, dorsal; B. male adult, lateral; C. female adult, dorsal; D. female adult, dorsolateral; E. male anal appendages, dorsal; F. male anal appendages, dorsolateral; G. male anal appendages, lateral. A, B: bar = 10 mm; E-G: bar = 0.5 mm; aap = anal appendage; sat = superior apical teeth; slst = synthorax lateral stripe.
Fig. 1 in Nannophya koreana sp. nov. (Odonata: Libellulidae): A new dragonfly species previously recognized in Korea as the endangered pygmy dragonfly Nannophya pygmaea Rambur
Fig. 1. Nannophya koreana: A. male adult, dorsal; B. male adult, lateral; C. female adult, dorsal; D. female adult, lateral; E. male anal appendages, dorsal; F. male anal appendages, lateral. A-D: bar = 10 mm; E, F: bar = 0.3 mm; aap = anal appendage; iat = inferior apical teeth; sat = superior apical teeth; slst = synthorax lateral stripe.
What you sample is what you get: ecomorphological variation in Trithemis (Odonata, Libellulidae) dragonfly wings reconsidered
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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. 2 in First records of Trithemis kirbyi Selys, 1891 in the Maltese Islands (Odonata: Libellulidae)
Fig. 2 – The reservoir at Imselliet Valley where the first Trithemis kirbyi in Malta was sighted.
Fig. 3 in Pantala flavescens successfully breeding for the second time in Malta (Maltese Archipelago) (Odonata: Libellulidae)
Fig. 3 – Two teneral specimens of Pantala flavescens.
Fig. 3 in An exceptional influx and successful breeding of Pantala flavescens on the Island of Malta (Maltese Archipelago) (Odonata: Libellulidae)
Fig. 3 – The Fiddien puddle in early October, 2020 (from where nearly all exuviae were collected).
Fig. 1 in An exceptional influx and successful breeding of Pantala flavescens on the Island of Malta (Maltese Archipelago) (Odonata: Libellulidae)
Fig. 1 – The main reservoir at Chadwick Lakes in late September, 2020.
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