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Carlos Molineri - One of the best experts on this subject based on the ideXlab platform.
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Description of the final instar larva of Rhionaeschna vigintipunctata (Ris, 1918) (Odonata: Aeshnidae).
Zootaxa, 2014Co-Authors: José Sebastián Rodríguez, Carlos MolineriAbstract:The final instar larva of Rhionaeschna vigintipunctata (Ris) (Odonata, Aeshnidae) is described for the first time. The description is based on a series of mature female larvae collected in Tucuman (NW Argentina) and reared to imago. It shares the U-shaped distal excision of epiproct with other larvae of the Marmaraeschna group (only R. pallipes and R. brevicercia known from this stage); but the minute tubercle at each side of the cleft of ligula is absent. Other characters unique to R. vigintipunctata include: open ligula (vs. closed in other " Marmaraeschna "), and mandibular formula. A table to distinguish the larvae of the three species of " Marmaraeschna " and biological and distributional data of R. vigintipunctata are included.
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Nuevos registros de Odonata y Ephemeroptera para el noroeste de Argentina
Sociedad Entomológica Argentina, 2014Co-Authors: José S. Rodríguez, Daniela Gomez, Carlos MolineriAbstract:Se presentan nuevos registros de 14 especies de Odonata y dos especies de Ephemeroptera, incluyendo dos registros nuevos de Argentina: Nephepeltia leonardina Rácenis (Anisoptera: Libellulidae) y Alloretochus peruanicus (Soldán) (Ephemeroptera: Caenidae). Las distribuciones de Aphylla theodorina (Navás) (Anisoptera: Gomphidae) y Caenis tenella (Navás) (Ephemeroptera: Caenidae) se extienden hasta las Yungas (ambas previamente conocidas para el NE de Argentina). También se presentan nuevos registros geográficos de: Neoneura confundens Wasscher & Van’t Bosch (Coenagrionidae); Anax amazili (Burmeister) (Aeshnidae); Brachymesia furcata (Hagen), Erythemis plebeja (Burmeister), Erythrodiplax melanorubra Borror, E. nigricans (Rambur), Macrothemis imitans imitans Karsch, M. musiva Calvert, Miathyria marcella (Selys) y Micrathyria hesperis Ris (Libellulidae); Progomphus complicatus Selys y Progomphus joergenseni Ris (Gomphidae)
Jessica L. Ware - One of the best experts on this subject based on the ideXlab platform.
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Not going with the flow: a comprehensive time‐calibrated phylogeny of dragonflies (Anisoptera: Odonata: Insecta) provides evidence for the role of lentic habitats on diversification
Molecular ecology, 2016Co-Authors: Harald Letsch, Brigitte Gottsberger, Jessica L. WareAbstract:Ecological diversification of aquatic insects has long been suspected to have been driven by differences in freshwater habitats, which can be classified into flowing (lotic) waters and standing (lentic) waters. The contrasting characteristics of lotic and lentic freshwater systems imply different ecological constraints on their inhabitants. The ephemeral and discontinuous character of most lentic water bodies may encourage dispersal by lentic species in turn reducing geographical isolation among populations. Hence, speciation probability would be lower in lentic species. Here, we assess the impact of habitat use on diversification patterns in dragonflies (Anisoptera: Odonata). Based on the eight nuclear and mitochondrial genes, we inferred species diversification with a model-based evolutionary framework, to account for rate variation through time and among lineages and to estimate the impact of larval habitat on the potentially nonrandom diversification among anisopteran groups. Ancestral state reconstruction revealed lotic fresh water systems as their original primary habitat, while lentic waters have been colonized independently in Aeshnidae, Corduliidae and Libellulidae. Furthermore, our results indicate a positive correlation of speciation and lentic habitat colonization by dragonflies: speciation rates increased in lentic Aeshnidae and Libellulidae, whereas they remain mostly uniform among lotic groups. This contradicts the hypothesis of inherently lower speciation in lentic groups and suggests species with larger ranges are more likely to diversify, perhaps due to higher probability of larger areas being dissected by geographical barriers. Furthermore, larger range sizes may comprise more habitat types, which could also promote speciation by providing additional niches, allowing the coexistence of emerging species.
André Nel - One of the best experts on this subject based on the ideXlab platform.
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The first fossil representative of the Nearctic genus Nasiaeschna in France (Odonata: Aeshnidae)
Palaeoentomology, 2019Co-Authors: Penelope Claisse, Patrick Brisac, André NelAbstract:The Miocene Odonata are rather well documented in France, thanks to many discoveries in the ‘Massif Central’ outcrops of Sainte Reine (latest Miocene, Cantal) and Montagne d’Andance (late Miocene, Ardèche) (Nel et al., 1994, 1996, 1997a,b; Riou & Nel, 1995). Among these, the family Aeshnidae is well-represented by the genera Aeshna Fabricius, 1775, Boyeria MacLachlan, 1896, and Aeschnophlebia Selys, 1883. Thus, it is with great surprise that one of us has found a new well-preserved specimen in the outcrop of Montagne d’Andance, representing a new species that we describe herein.
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First record of hawker dragonflies from Eocene Baltic amber (Odonata: Anisoptera: Gomphaeschnidae)
Zootaxa, 2017Co-Authors: Stefan Pinkert, Günter Bechly, André NelAbstract:Based on three specimens the first record of hawker dragonflies from Baltic amber is described in a new genus with two new species: Elektrogomphaeschna peterthieli gen. et sp. nov. and E. annekeae sp. nov.. They belong to the family Gomphaeschnidae and are tentatively attributed to the extinct subfamily Gomphaeschnaoidinae. The latter was previously only known from Cretaceous fossils and is here shown to have survived the K-Pg mass extinction event. This discovery also confirms the still higher diversity of Gomphaeschnidae during the Paleogene compared to the Neogene that was dominated by the more derived Aeshnidae sensu stricto.
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A new genus and species of darner dragonfl y (Aeshnidae: Odonata) from the lower Eocene of Laguna del Hunco, Patagonia, Argentina
Annales de la Société entomologique de France (N.S.), 2010Co-Authors: Julián F. Petrulevičius, André Nel, Jean-françois VoisinAbstract:Abstract A new genus of Aeshnidae, Huncoaeshna n. gen., based on Huncoaeshna corrugata n. gen., n. sp., is erected from Laguna del Hunco (Ypresian) in Patagonia Argentina. The specimen presents a special kind of preservation with the middle part of the wing wrinkled. The presence of only two fossil specimens of Aeshnidae in South America is surely due to the lack of paleontomologists and collections of fossil insects in the subcontinent.
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A new genus and species of hawker dragonfly (Aeshnidae) from the Lower Cretaceous of southern England
Cretaceous Research, 1996Co-Authors: Edmund A. Jarzembowski, André NelAbstract:A new genus and species of Aeshnidae: Gomphaeschninae related toGomphaeschna, AlloaeschnaandOligoaeschnafrom the Lower Cretaceous of southern England is described and namedCretalloaeschna cliffordae.
Akumar - One of the best experts on this subject based on the ideXlab platform.
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DNA Barcoding of selected dragonfly species (Libellulidae and Aeshnidae) forspecies authentication with phylogenetic assessment
European Journal of Experimental Biology, 2016Co-Authors: Pushparaj Karthika, Chitravel Vadivalagan, Chinnapan Gunasekaran, Shanmugam An, AkumarAbstract:Dragonflies are the bio indicators of the aquatic ecosystem. Knowledge and studies on the diversity of dragonflies in India is very high. Identification by traditional taxonomy often leads to misidentification. Incidence of sexual dimorphism is found to be high particularly in the Libellulidae and Aeshnidae family. In order to resolve the above mentioned problem, the accurate identification of the dragonflies was carried out by DNA barcoding using COI gene. In the present study, selected dragonfly species (Bradinopyga geminata, Crocothemis servilia, Diplacodes trivialis and Anaciaeschna jaspidea) of the family of Libellulidae and Aeshnidae were taken and along with three other evident species (Pantala flavescens, Orthetrum sabina, and Brachythemis contaminata) were retrieved from GenBank. The phylogenetic tree was created using NJ (Neighbour Joining) method to determine the origin and evolutionary relationships of the species. Similarity search was performed and conformed species were submitted to the NCBI and BOLD database for species authentication. The present study concluded that the DNA barcoding is an invaluable tool for the authentication of the species. Storage of this nucleotide information in a database like BOLD would greatly help in the identification up to sub species level.
Natalia Von Ellenrieder - One of the best experts on this subject based on the ideXlab platform.
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A synopsis of the genus Triacanthagyna (Odonata: Aeshnidae)
International Journal of Odonatology, 2003Co-Authors: Natalia Von Ellenrieder, Rosser W. GarrisonAbstract:Abstract This synopsis of adult Triacanthagyna includes the revalidation of two species thought to be synonyms (T. nympha and T. obscuripennis), the description of a new species (T. williamsoni; type locality: Peru, Tingo Maria), keys to both sexes, illustrations of diagnostic characters, and distribution maps of all species. A phylogenetic assessment of the nine species is included, using outgroup comparison and parsimony algorithm. The cladistic analysis shows Triacanthagyna to be partitioned into two monophyletic groups: (1) two species lacking humeral, interpleural and metapleural dark stripes on pterothorax and with male cerci narrowing gradually at tip (T. septima and T. obscuripennis), and (2) six species with male cerci bearing subbasal teeth (T. satyrus, T. caribbea, T. ditzleri, T. williamsoni, T. nympha and T. trifida).
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A phylogenetic analysis of the extant Aeshnidae (Odonata: Anisoptera)
Systematic Entomology, 2002Co-Authors: Natalia Von EllenriederAbstract:Abstract A cladistic analysis of the world Aeshnidae is presented, based on fifty-eight characters of adult and larval anatomy. The ingroup taxa include all the extant genera of Aeshnidae, and the austropetaliid genera Phyllopetalia and Hypopetalia were chosen as the outgroup. The strict consensus tree obtained after successive weighting shows that the subgroups defined traditionally for Aeshnidae are paraphyletic or polyphyletic. The previous reclassification derived from analyses based on wing venation is supported in terms of the monophyly of Aeshnidae, Gomphaeschninae and its sister group comprising the remaining Aeshnidae. Gomphaeschninae is confirmed as sister group of the remaining Aeshnidae (= Aeshnodea Bechly). The sister-group relationships between Gomphaeschna+Sarasaeschna and Linaeschna+Oligoaeschna are corroborated. Within Aeshnodea, three monophyletic groups emerged: Boyeria + (Petaliaeschna+ (Limnetron+Gynacanthaeschna+Periaeschna)) + ((Cephalaeschna+Caliaeschna) + (Allopetalia (Notoaeschna+Spinaeschna))); Dendroaeschna+ (Epiaeschna+ (Aeschnophlebia+ (Nasiaeschna+ (Tetracanthagyna+Brachytron)))); and Polycanthagyna+ (Basiaeschna+ (Amphiaeschna+ (Indaeschna+ (Oplonaeschna+ (Racenaeschna+Plattycantha+Agyrtacantha+Triacanthagyna+ (Subaeschna+Austrogynacantha+Gynacantha) + (Heliaeschna+ (Neuraeschna+Staurophlebia))) + ((Castoraeschna+Coryphaeschna+Remartinia) + (Oreaeschna+ (Aeshna+ (Anaciaeschna+ ((‘A.’isosceles+Andaeshna) + (Anax+Hemianax)))))). Additional informative characters are required to test the relationships suggested here between the main groups of Aeshnodea and some enigmatic basal taxa (Antipodophlebia, Austroaeschna, Acanthaeschna, Telephlebia, Austrophlebia and Planaeschna).
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Revision of the subgenus Marmaraeschna (Odonata: Aeshnidae)
International Journal of Odonatology, 2001Co-Authors: Javier Muzón, Natalia Von EllenriederAbstract:Abstract This revision of the subgenus Marmaraeschna includes the description of three new species: Aeshna (M.) fissifrons, A. (M.) obscura and A. (M.) brevicercia, as well as redescriptions of the previously known species, including the first description of the male of A. (M.) pallipes, a key for males and females and an updated distribution for each species. Useful characters are the presence or absence of black stripes over frontoclypeal and fronto-ocular grooves, T-spot shape, abdominal colour pattern, ventral terga contour and cerci shape.
