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57 results for “army ants”
Figures 5–6 in Aenictus seletarius, a New Species of Hypogaeic Army Ant from Singapore, with an Updated Key to the Aenictus minutulus Species Group (Hymenoptera: Formicidae: Dorylinae) from Southeast Asia
Figures 5–6. Aenictus seletarius (holotype, ANTWEB1009000, LKCNHM) from Singapore. (5) Full-face view; (6) head view focusing on mandibles.
Figures 2–4 in Aenictus seletarius, a New Species of Hypogaeic Army Ant from Singapore, with an Updated Key to the Aenictus minutulus Species Group (Hymenoptera: Formicidae: Dorylinae) from Southeast Asia
Figures 2–4. Aenictus seletarius (holotype, ANTWEB1009000, LKCNHM) from Singapore. (2) Profile view; (3) dorsal view; (4) profile view focusing
Figure 1 in Aenictus seletarius, a New Species of Hypogaeic Army Ant from Singapore, with an Updated Key to the Aenictus minutulus Species Group (Hymenoptera: Formicidae: Dorylinae) from Southeast Asia
Figure 1. Left side map: Known global distribution of Aenictus species (modified from antmaps.org). Right side box: Distribution of A. minutulus group species in Southeast Asia with the inclusion of A. seletarius from Singapore (modified after Jaitrong and Hashimoto 2012, Jaitrong 2015).
FIGURE 10 in Taxonomy of the African army ant Dorylus gribodoi Emery, 1892 (Hymenoptera, Formicidae) — new insights from DNA sequence data and morphology
FIGURE 10. Dorsal view of the petiole of a large D. emeryi worker (HW 3.74 mm) from Taï, Ivory Coast.
FIGURE 9 in Taxonomy of the African army ant Dorylus gribodoi Emery, 1892 (Hymenoptera, Formicidae) — new insights from DNA sequence data and morphology
FIGURE 9. Dorsal view of the petiole of a large D. gribodoi worker (HW 2.85 mm) from Taï, Ivory Coast.
Convergent evolution of the army ant syndrome and congruence in big-data phylogenetics
<p>Data for project entitled "Convergent evolution of the army ant syndrome and congruence in big-data phylogenetics" by Marek L. Borowiec</p>
Data from: Early and dynamic colonization of Central America drives speciation in Neotropical army ants
The emergence of the Isthmus of Panama is one of the most important events in recent geological history, yet its timing and role in fundamental evolutionary processes remain controversial. While the formation of the isthmus was complete around 3 million years ago (Ma), recent studies have suggested prior intercontinental biotic exchange. In particular, the possibility of early intermittent land bridges facilitating colonization constitutes a potential mechanism for speciation and colonization before full closure of the isthmus. To test this hypothesis, we employed genomic methods to study the biogeography of the army ant genus Eciton, a group of keystone arthropod predators in Neotropical rainforests. Army ant colonies are unable to disperse across water and are therefore ideally suited to study the biogeographic impact of land bridge formation. Using a reduced representation genome sequencing approach, we show that all strictly Central American lineages of Eciton diverged from their respective South American sister lineage between 4 and 7 Ma, significantly prior to the complete closure of the isthmus. Furthermore, three of the lineage pairs form extensive and coincident secondary contact zones in Costa Rica and Nicaragua, with no evidence of gene flow. Such a discrete and repeated biogeographic pattern indicates at least two waves of army ant dispersal into Central America that were separated by significant genetic divergence times. Thus, by integrating phylogenomic, population genomic and geographic evidence, we show that early colonization of Central America across the emerging Isthmus of Panamá drove parallel speciation in Eciton army ants.
Data from: Cryptic diversity, high host specificity and reproductive synchronization in army ant-associated Vatesus beetles
Army ants and their arthropod symbionts represent one of the most species-rich animal associations on Earth, and constitute a fascinating example of diverse host-symbiont interaction networks. However, despite decades of research, our knowledge of army ant symbionts remains fragmentary due to taxonomic ambiguity and the inability to study army ants in the lab. Here we present an integrative approach that allows us to reliably determine species boundaries, assess biodiversity, match different developmental stages and sexes, and to study the life cycles of army ant symbionts. This approach is based on a combination of community sampling, DNA barcoding, morphology and physiology. As a test case, we applied this approach to the staphylinid beetle genus Vatesus and its different Eciton army ant host species at La Selva Biological Station, Costa Rica. DNA barcoding led to the discovery of cryptic biodiversity and, in combination with extensive community sampling, revealed strict host partitioning with no overlap in host range. Using DNA barcoding, we were also able to match the larval stages of all focal Vatesus species. In combination with studies of female reproductive physiology, this allowed us to reconstruct almost the complete life cycles of the different beetle species. We show that Vatesus beetles are highly adapted to the symbiosis with army ants, in that their reproduction and larval development are synchronized with the stereotypical reproductive and behavioral cycles of their host colonies. Our approach can now be used to study army ant-symbiont communities more broadly, and to obtain novel insights into co-evolutionary and ecological dynamics in species-rich host-symbiont systems.
Fig. 2 in Taxonomic Review and Natural History Notes of the Army Ant-Associated Beetle Genus Ecclisister Reichensperger (Coleoptera: Histeridae: Haeteriinae)
Fig. 2. Collection sites and phylogenetic tree of barcoded Ecclisister costaericae populations. A) Map of Central and South America depicting the collection sites of studied Ecclisister specimens, B) RAxML tree of COI sequence data (658bp) depicting genetic divergence of E. costaericae from different populations. Bootstrap support (1,000 replications) is given at branches of interest. The scale bar represents expected substitutions per site as inferred by the RAxML algorithm. The haeteriine species Cheilister lucidulus Reichensperger (GenBank accession number: KX420342; von Beeren and Tishechkin, 2017) and Clientister henrici Reichensperger (GenBank accession number: KX420343; von Beeren and Tishechkin, 2017), both members of the tribe Nymphistrini, served as outgroups. Sample names are given at tips (for more information, see Table 1).
Fig. 1. Ecclisister species. E in Taxonomic Review and Natural History Notes of the Army Ant-Associated Beetle Genus Ecclisister Reichensperger (Coleoptera: Histeridae: Haeteriinae)
Fig. 1. Ecclisister species. E. bickhardti lectotype: a) dorsal view, b) lateral view, c) ventral view, d) frontal head, e) aedeagus, dorsal view, f) aedeagus, lateral view; E. costaericae lectotype: g) dorsal view, h) lateral view, i) ventral view, j) frontal head, k) aedeagus, dorsal view, l) aedeagus, lateral view. Scale bars: a–c, g–i = 1 mm; d and j = 0.2 mm. Dorsal and lateral views of aedeagi are at the same scale.
Raw FTIR Data for retraction of: An Eocene army ant
<p><span>This dataset is related to a retraction of a published Biology Letters article, Sosiak et al. 2022, entitled "An Eocene Army Ant" (<a href="https://doi.org/10.1098/rsbl.2022.0398">https://doi.org/10.1098/rsbl.2022.0398</a></span><span>). Shortly after publication of Sosiak et al. (2022), we received reports from two readers of historical collections </span><span>comprising specimens similar in appearance to the one we reported in our initial article. These historic collections were originally mislabeled and were more recently revealed to be much younger sub-fossil resins (copal); both of these collections were also established roughly around the same timeframe (1920–1930s) associated with the museum specimen from Sosiak et al. (2022). This prompted us to investigate the provenance of the specimen reported in Sosiak et al. (2022) via FTIR spectroscopy. Our spectroscopic analysis did not recover a unique characteristic signature of Baltic amber and confirms that </span><span>the specimen we initially reported is not Baltic amber but instead most probably sub-fossil copal. These data comprise the raw FTIR spectroscopic data we used to generate Figure 1 in the retraction as well as the R code underpinning that figure. </span></p>
Data from: Early and dynamic colonization of Central America drives speciation in Neotropical army ants
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Data from: Strict monandry in the ponerine army ant genus Simopelta suggests that colony size and complexity drive mating system evolution in social insects
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Data from: Microhabitat and body size effects on heat tolerance: implications for responses to climate change (army ants: Formicidae, Ecitoninae)
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Higher probability of tick infestation reveals a hidden cost of army ant-following in Amazonian birds
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Data from: Genetic evidence for landscape effects on dispersal in the army ant Eciton burchellii
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Data from: Cryptic diversity, high host specificity and reproductive synchronization in army ant-associated Vatesus beetles
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Raw FTIR Data for retraction of: An Eocene army ant
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Data from: Species-level predation network uncovers high prey specificity in a Neotropical army ant community
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Data from: Plastic collective endothermy in a complex animal society (army ant bivouacs: Eciton burchellii parvispinum)
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.