Final instar larva of Acanthagrion truncatum Selys, 1876 (Zygoptera: Coenagrionidae)

Vilela, Diogo Silva; Venâncio, Henrique; Santos, Jean Carlos

doi:10.11646/zootaxa.4881.2.12

Cited by 736 publications

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“…With the increment of inventories and updates of vulnerability statuses in the future, many species restricted to a single habitat or that have been recently discovered will be included in some risk of extinction. For example, E. ana, a species restricted to preserved palm swamps (Guillermo-Ferreira et al 2016, Vilela et al 2020b), is Uberlândia, Minas Gerais, in addition to the taxonomic description of the female of Forcepsioneura machadorum, and the description of the larvae of Acanthagrion truncatum (Vilela et al 2020c). Altogether, we found 101 odonate species in the municipality, representing approximately 32% and 11% of the total richness in Minas Gerais and Brazil, respectively.…”

Section: Discussionmentioning

confidence: 57%

Dragonflies and Damselflies in a region of the Triângulo Mineiro, Minas Gerais: checklist and taxonomic additions

et al. 2021

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Remaining freshwater systems are historically under threat mainly due to human activities such as agriculture and urbanization. The consequences of such activities are innumerous, and among them there is a decrease of suitable habitats for threatened fauna. In the Brazilian Cerrado, the odonatofauna of palm swamps and riparian forests are still poorly explored, a fact that difficult conservation efforts of the group. Thus, we performed an inventory in several urban and rural sites containing these phytophysiognomies in Uberlândia, Triângulo Mineiro region, western Minas Gerais state. In total, we found 101 Odonata species, seven families and 46 genera in the municipality, with 76 and 66 species, respectively, belonging to palm swamp and forest sites. From this diversity, eight species were first records in the state of Minas Gerais: Neuraeschna claviforcipata Martin, 1909, Phyllocycla cf. medusaBelle, 1988, Diastatops intensa Montgomery, 1940, Oligoclada pachystigma Karsch, 1890, O. xanthopleura Borror, 1931, Angelagrion nathaliaeLencioni, 2008, Telebasis sanguinalis Calvert, 1909 and Telebasis simulacrum (Calvert, 1909). We also sampled Erythrodiplax anaGuillermo-Ferreira & Vilela 2016, a species listed as endangered (EN) by the IUCN red list. Additionally, we include some taxonomic notes of Forcepsioneura machadorum females, a newly discovered species in the region. Our results contribute to the Odonata database in Brazil and highlights the importance inventories in poorly explored aquatic ecosystems.

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Section: Discussionmentioning

confidence: 57%

Dragonflies and Damselflies in a region of the Triângulo Mineiro, Minas Gerais: checklist and taxonomic additions

et al. 2021

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“…Three inventories in this municipality found more than 60 species of adult dragonflies in degraded areas (Vilela et al 2016, Barbosa et al 2019, Vilela et al 2020a). Thus, it is necessary to carry out more inventories that include urban areas, which are poorly inventoried in the region.…”

Section: Introductionmentioning

confidence: 94%

Effects of urbanization on the diversity, life-history traits and fluctuating asymmetry of odonates (Odonata: Zygoptera and Anisoptera)

Silva¹

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Urbanization has grown progressively and changing drastically and rapidly natural habitats, threatening the viability of sensitive groups. Little is known about the diversity and taxonomy of dragonflies from urban areas of the Cerrado, although some studies show that this environment can contribute to filling Linnean and Wallacean gaps. In addition, studies on the plastic responses of odonates under urbanization and extreme climate events are still emerging and rare in the Neotropical region. In this thesis, we investigated how urbanization can affect diversity and plastic responses of odonates, both for local urban conditions and future climate events. To achieve these objectives, we first performed an extensive inventory of the group in various ecosystems and phytophysiognomies of the Cerrado in urban and non-urban areas between 2018 and 2020 in Uberlândia, Minas Gerais. This inventory composed the first chapter. From these samples we separated two damselflies species (Acanthagrion truncatum Selys, 1876 and Argia reclusa Selys, 1865), representing different ecosystems, and that are abundant among urbanization gradients and within urban areas. These samples were part of the second chapter, which aimed to evaluate the morphometric and stress responses (evaluated by fluctuating asymmetry) of the group's wings in under urbanization, more specifically to fragmentation, and local preservation of urban fragments. Finally, in the third chapter, we conducted an experiment with larvae to verify the effect of future heat waves on A. truncatum life history traits, sampled in urban pons. In the first chapter, we described the female of Forcepioneura machadorum Vilela, Venâncio & Santos, 2020 (Coenagrionidae: Protoneurinae) and sampled 101 species in urban and non-urban areas of Uberlândia, eight of these were new records for Minas Gerais. In the second chapter, we helped to fill knowledge gaps about the effects of urbanization on morphological traits and asymmetry of damselflies along urbanization gradients. For A. truncatum, we observed a negative effect on wing size, while the preservation of urban fragments proved to be an important factor for the size and shape of this trait for A. reclusa. Finally, we demonstrate in the third chapter that exposure of larvae to heat waves results in phenological advance and reduction in the size of urban adults of A. truncatum, a pattern that can affect the future viability of this species in this type of land use. Thus, the results of this thesis showed that we still know little about how urbanization can affect diversity and plastic and ontogenetic responses of odonates. Especially in the Neotropical region, where urbanization and climate change come too much and quickly growing, there is the urgency of further studies of the group.

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The F-0 larva of Angelagrion nathaliae Lencioni, 2008 from Southern Minas Gerais state, Brazil (Odonata: Coenagrionidae)

FERREIRA,

OLIVEIRA,

SOUZA

et al. 2024

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In this study, we described the last instar larva of Angelagrion nathaliae Lencioni, 2008, the first one described for this genus, collected in Inconfidentes and Uberlândia municipalities, Minas Gerais state, Brazil. We compared the diagnostic characters of A. nathaliae with some species of Telebasis Selys, 1865. Despite some similarities with Telebasis larvae, the larva of A. nathaliae can be distinguished from the family by a combination of characters of the mouthparts and gills.

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Final instar larva of Acanthagrion truncatum Selys, 1876 (Zygoptera: Coenagrionidae)

Cited by 736 publications

References 0 publications

Dragonflies and Damselflies in a region of the Triângulo Mineiro, Minas Gerais: checklist and taxonomic additions

Dragonflies and Damselflies in a region of the Triângulo Mineiro, Minas Gerais: checklist and taxonomic additions

Effects of urbanization on the diversity, life-history traits and fluctuating asymmetry of odonates (Odonata: Zygoptera and Anisoptera)

The F-0 larva of Angelagrion nathaliae Lencioni, 2008 from Southern Minas Gerais state, Brazil (Odonata: Coenagrionidae)

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