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FIGURE 12 in New Insights Into The Systematics Of Parasitiformes (Acarina) With New Species From South America

FIGURE 12: Gamasiphoides acanthioides n. sp. a – Female Venter; b – Male Chelicera, 10 µm; c – Male Femur, genu, tibia, tarsus of leg II, 52 µm long.

FIGURE 11 in New Insights Into The Systematics Of Parasitiformes (Acarina) With New Species From South America

FIGURE 11: Gamasiphoides acanthioides n. sp. a – Female Tectum, 42 µm wide; b – Deuto-nymph Tectum, 35 µm wide; c – Female Dorsum, 660-670 µm long.

FIGURE 10 in New Insights Into The Systematics Of Parasitiformes (Acarina) With New Species From South America

FIGURE 10: Cladogram of the subgroups of the Margotrichina Karg et Schorlemmer, Synapomorphies 1 – 3, characteristics for the subgroups of the Margotrichina; our present results confirm previous findings:

FIGURE 8 in New Insights Into The Systematics Of Parasitiformes (Acarina) With New Species From South America

FIGURE 8: Dorsum of larval stages in different groups of Margotrichina showing the shifting of setae I3, ancestrally caused by development of a special pygidial shield within the posterior rows of setae; a – Microgyniina, 220 µm; b – Uropodina, 250 – 380 µm; c – Ixodides, 500-600 µm long (after Hirschmann 1961 and Karg & Schorlemmer 2008).

FIGURE 6 in New Insights Into The Systematics Of Parasitiformes (Acarina) With New Species From South America

FIGURE 6:: Holostethus longosetis n. sp. Female. a – Venter; b – Pedipalpus, 245 µm; c – Chelicera, 88 µm long.

FIGURE 9 in New Insights Into The Systematics Of Parasitiformes (Acarina) With New Species From South America

FIGURE 9: Dorsum of larval stages in groups of Parasitiformes showing undisturbed transverse rows of setae which we interpret in accordance with Christian & Karg (2008) as residues of an ancestral body segmentation; a – Gamasina – Ascides, 270 – 290 µm; b – Gamasina – Eugamasides, 130 – 455 µm; c – Antennophorina – Sejides, 290 – 370 µm long. Some groups have developed special shaped setae, which we have to regard as secondary developments (some modified after Karg 1962, 1965 and Hirschmann 1957).

FIGURE 5 in New Insights Into The Systematics Of Parasitiformes (Acarina) With New Species From South America

FIGURE 5: Holostethus longosetis n. sp. Female. a – Dorsum, 957 – 1092 µm long; b – Tectum, 88 µm wide.

FIGURE 7 in New Insights Into The Systematics Of Parasitiformes (Acarina) With New Species From South America

FIGURE 7: Holostethus longosetis n. sp. a – Male Sternum, 350 µm long; b – Female Hypostome, 175 µm long.

FIGURE 4 in New Insights Into The Systematics Of Parasitiformes (Acarina) With New Species From South America

FIGURE 4: Pyrosejus verticis n. sp. Female. a – Venter; b – Tectum, 34 µm wide; c – Chelicera, 35 µm long.

FIGURE 2 in New Insights Into The Systematics Of Parasitiformes (Acarina) With New Species From South America

FIGURE 2: Cladogram of the subgroups of Trigynaspida Camin et Gorirossi, 1955, synapomorphies (1 – 4) and autapomorphies (5 – 9), characteristics for the Super-families of Trigynaspida; our present results confirm previous findings:

FIGURE 1 in New Insights Into The Systematics Of Parasitiformes (Acarina) With New Species From South America

FIGURE 1: Cladogram of the groups of Parasitiformes based on synapomorphies explained by Karg & Schorlemmer (2008); the subgroups of this taxon are added under the Uropodina: Uropodoidea, Polyaspidoidea and Thinozerconoidea.

opencc-zeroSep 2021View details →

Tropical South America Diatom Database (TSADB)

Determining the mechanisms of community assembly forms the foundation of biogeography and community ecology. Studies of the biodiversity and distribution of Neotropical macro-organisms have revealed the roles of environmental, spatial, and historical factors in structuring communities at different spatial and temporal scales, but the role of these factors play for species and communities on microorganisms are still poorly known. Diatoms are a very species-rich group of algae, disperse widely, and sensitive to environmental variation due to their position in the base of aquatic food webs. Here, we present the Tropical South American Diatom Database (TSADB) which contains geographical and ecological information of species across lentic and lotic environments, including predictors that describe local (limnological) and regional (geo-climatic) factors. The database can be used to tackle fundamental questions in macroecology, including metacommunity ecology and biogeography theories that form the foundation for better understanding the rapid environmental change the tropical regions are experiencing. The TSADB includes diatom taxa from 437 samples in 326 sites containing distributed across 26 regions (0 to 5,070 m a.s.l, and between 8°N–35°S; 58–90°W). In addition, long-term, diatom-based paleolimnological records are presented as a complementary tool for identifying regions with available modern and paleo-datasets for a long-term limnological change observatory in the tropical Americas. We describe the TSADB structure and functionality, and R codes for data manipulation and visualization. Each of the 26 study regions is represented by 3 data matrices: sampling site information, environmental variables (limnology, climate, and landscape), and diatom community data (relative abundance or presence/absence). Access to data and future additions is through publicly available repositories and a guide to contributors, respectively, providing opportunities for complementing existing databases on diatoms and allowing optimal usage of TSADB by scientist including diatomists, limnologists, aquatic ecologists, and natural resource managers.

opencc-by-4.0Dec 2010View details →

Fig. 1 in A new genus and species of Heroini (Perciformes: Cichlidae) from the early Eocene of southern South America

Fig. 1. Map of the collecting area (arrow) at Alemanía in northwestern Argentina.

opencc-by-4.0Mar 2023View details →

ENSO influence on water vapor transport and thermodynamics over Northwestern South America

Datasets used, generated and analysed during the study "ENSO influence on water vapor transport and thermodynamics over Northwestern South America"

opencc-by-4.0Apr 2023View details →

Automated Earthquake Catalogues for CHARGE & CHARSME/CSN networks in South America (Pampean Flat Slab)

This repository includes: 1. Gzipped automated catalogues of earthquake locations with P and S arrival times for: <ul> <li>The CHARGE network - charge.data.gz</li> <li>The CHARSME and CSN networks - charsme_csn.data.gz</li> </ul> 2. A README explaining the information in each column

opencc-zeroMay 2023View details →

Data from: Contemporary distribution of non-native Chinook salmon (Oncorhynchus tshawytscha) in South America

The dataset incorporates information on Chinook salmon occurrences by basin in South America, which was obtained from the literature and from unpublished information obtained from research monitoring efforts conducted in Chile, Argentina, and Uruguay. The information was divided into two periods: historical (prior to 2006) and contemporary information (2006 onwards). Year or range of years in which the observation was taken was also included. This dataset was used to construct Fig. 1 of the manuscript "Contemporary distribution of non-native Chinook salmon (Oncorhynchus tshawytscha) in South America".

opencc-by-4.0Dec 2022View details →

Potential distribution dynamics of Araucaria (Araucariaceae) in South America

The distribution dynamics of the genus Araucaria in South America over time was analyzed by obtaining species distribution models for Araucaria angustifolia and A. araucana from the Last Interglacial to present.

opencc-zeroJul 2023View details →

Geographical trends of soil-associated biodiversity changes due to tree plantations in South America: biome and climate constraints revealed through meta-analysis

Aim Evaluate the interaction between climate and biome structure when explaining changes in species richness of soil-associated communities due to tree plantations developed in different biomes. Compare the response of plants, soil invertebrates, and soil microorganisms, and test whether they should be considered sensitive-coupled biotas. Location Continental South America. Time period 1996–2023 Major taxa studied Plants, soil invertebrates and soil microorganisms Methods Through a meta-analysis, the change in species richness (i.e., response ratio) associated with tree plantations was evaluated in 127 points of study across South America, considering soil-associated communities of plants, invertebrates and microorganisms. The influence of biome structure (open vs. closed habitats) on the response ratio and its interaction with the actual evapotranspiration (AET) and temperature seasonality was evaluated. Differentiated responses of different taxa were tested by comparing models with and without an interaction term referring to the taxon studied. The regional agricultural cover and plantation age were considered as anthropogenic variables. Results Models containing the AET were better at explaining the trend of change in species richness than those with temperature seasonality. The response to the change in species richness was oppositely related to the AET in open and closed biomes. Plants presented a higher loss in species richness than soil invertebrates and microorganisms. The three taxa were positively associated with AET, while seasonality was not relevant in any case. Both anthropogenic variables significantly lessened the change in species richness in all models. Main conclusions The structural contrast between the anthropogenic habitat and the biome where it is developed is a key factor influencing the response of soil-associated communities to tree plantations. Nevertheless, its influence must be assessed together with climatic and anthropogenic variables given that their interaction can explain different geographical trends in the change in species richness across regions.

opencc-zeroSep 2023View details →

Brain cortical volume and area from Freesurfer's parcellation in a sample of healthy volunteers from South America

This dataset aims to deepen the analysis of cortical gyral and sulcal asymmetry of the entire cerebral cortex of healthy adult individuals by quantifying the gray matter content of the right and left hemispheres in a reference sample from South America. The subjects were sampled from populations scarcely represented in MRI research, which tends to be biased towards groups of European ancestry from Europe and North America. In contrast, the population under study is an admixture of Native American, European, and African components that contributed to a variable extent to their gene pool. Consequently, this study will add to expanding the diversity in brain morphometric data and the construction of more population-representative references.