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28 results for “Discocyrtus”
FIGURE 5 in Geographical distribution of Discocyrtus prospicuus (Arachnida: Opiliones: Gonyleptidae): Is there a pattern?
FIGURE 5. Predicted distribution of Discocyrtus prospicuus: overlay of models obtained with BIOCLIM (green; true-false, full extension) and MAXENT (light blue; binary), showing the overlapping areas (dark blue). Records: yellow dots. Selected localities (or groups of localities) are referenced as follows: 1. Yala, 2. San Lorenzo and road to Yacones, 3. San Pedro de Colalao, 4. Sierra de San Javier (road to San Javier and Villa Nougués), 5. Sierras Chicas area, 6. Calamuchita area, 7. Villa Nueva, 8. Yapeyú, 9. Concordia, 10. Colón and Banco Pelay, 11. Fray Bentos, 12. Baradero, 13. Villa Argentina, 14 Parque Sierra Minas, 15. Las Toninas and Costa Chica, 16. Villa Gesell, 17. Sierra de los Padres. References for localities in the RLP area: see Fig. 2.
FIGURE 4 in Geographical distribution of Discocyrtus prospicuus (Arachnida: Opiliones: Gonyleptidae): Is there a pattern?
FIGURE 4. Records set of D. prospicuus plotted for cumulative relative frequency for the six most relevant bc variables, as determined by their contribution to the MAXENT models and the jackknife analysis.
FIGURE 9 in Geographical distribution of Discocyrtus prospicuus (Arachnida: Opiliones: Gonyleptidae): Is there a pattern?
FIGURE 9. Distribution models built with selected records removed, detail of predictions in province of Tucumán. A–B: without all 7 points from NW Argentina (A using BIOCLIM, B using MAXENT); C: without 7 points of NW and 14 points from sierras of Córdoba (MAXENT). Blue dots: actual records of the species.
FIGURE 8 in Geographical distribution of Discocyrtus prospicuus (Arachnida: Opiliones: Gonyleptidae): Is there a pattern?
FIGURE 8. Results of the jackknife test performed to determine the relative importance of the 11 bc variables employed in MAXENT. Red bar: regularized training gain with all variables (2.9892). Light blue bars: training gain with variable excluded (less gain, probable higher importance; variables are ordered following this value); dark blue bars: training gain with variable alone.
FIGURE 1 in Geographical distribution of Discocyrtus prospicuus (Arachnida: Opiliones: Gonyleptidae): Is there a pattern?
FIGURE 1. Locality records of Discocyrtus prospicuus (red dots), displayed over selected ecoregions in central-northern Argentina and Uruguay. Rectangles indicate the main portions of the species range: 1. Core area, including: lower Uruguay River banks (UrRiv), lower Paraná delta (ellipse), RLP (Rio de la Plata banks), Atlantic coast (AC); 2. Northwestern Argentina (NWA), comprising provinces of Jujuy, Salta and Tucumán; 3. Central sierras (CS) in province of Córdoba; 3a. Isolated population at Villa Nueva (VN). White small dots: records of Discocyrtus testudineus. Yellow dots in province of Misiones (MIS): records formerly assigned to D. prospicuus, now excluded (hereby referred to as Discocyrtus bucki). Ecoregions (acronyms underlined) delineated by Olson et al. (2001): yungas (Yu); dry (sub-xeric) Chaco (Ch); humid Chaco (hCh); espinal scrubland (Esp); humid Pampean steppe (PS); Uruguayan savanna (UrS); alto Paraná atlantic forests (Paranense forests) (APF); light blue: Paraná flooded savanna. Inset: location of depicted area in South America.
FIGURE 7 in Geographical distribution of Discocyrtus prospicuus (Arachnida: Opiliones: Gonyleptidae): Is there a pattern?
FIGURE 7. Overlay of 10 replicates of the MAXENT model, using the subsample procedure, with 25% of the data set used for test (random seed activated; beta multiplier = 0.5). Dark blue: predicted in all 10 runs; medium blue: predicted in 6–9 runs; light blue: predicted in 1–5 runs. White dots: presence records.
FIG. 2 in Review of Paradiscocyrtus Mello-Leitão, 1927 (Gonyleptidae, Opiliones), with the transfer of Paradiscocyrtus cerayanus Roewer, 1929 to Discocyrtus Holmberg, 1878 and a new interpretation of its type locality
FIG. 2. — The most frequent tree (k-values = 5, 6, 10, 15 and 20; 311 steps, consistency index = 52, retention index = 72) obtained by the protocol applied. Clade support values are indicated above the branches (absolute Bremer support values/absolute symmetric frequencies). Clade stability is indicated below the branches by the sensitivity plots ('Navajo rugs'), which indicate different concavity values (k) tested (black squares indicate monophyly; white squares indicate non-monophyly). Main groups have colored branches: Pachylinae s. str. (magenta), Roeweriinae (green), Neopachylinae (red), Mitobatinae (blue) and Discocyrtus s. str. (orange). The unmarked groups are not members of either DRMN or Pachylinae s. str. Shaded taxa names (in grey) evidence the representants of Paradiscocyrtus Mello-Leitão, 1927 status quo 2020.
FIGURE 2 in Geographical distribution of Discocyrtus prospicuus (Arachnida: Opiliones: Gonyleptidae): Is there a pattern?
FIGURE 2. Detail of records of D. prospicuus on the lower Paraná delta and inner Río de la Plata. Colors indicate elevation above present sea level, as follows: 0–2 m (blue), 2–6 m (grey, together with the former represents surfaces under sea level at the maximal transgression 6,000 yr BP), 6–12 m (green), 12–20 (yellow), 20–30 m, 30–100 m, above 100 m (different brown levels).
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