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5,053 results for “Arachnidae”
Morphometry of the pedipalp patella provides new characters for species-level taxonomy in whip spiders (Arachnida, Amblypygi): A test case with description of a new species of Phrynus
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qPCR results from design and partial validation of three novel eDNA qPCR assays for several common North American tick (Arachnida: Ixodida) species
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Data from: A stable phylogenomic classification of Travunioidea (Arachnida, Opiliones, Laniatores) based on sequence capture of ultraconserved elements
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Arachnida species (spiders) abundance: Trophic Structure: Insect Species Diversity, Abundance and Body Size
The goal of this study was to examine the populations of insects in prairies and savannas. Most of the prairies had developed after being abandoned from agriculture, but none of the savannas had been cultivated. The history of burning varied between sites. The main sampling for this study was conducted in 1992 by the lead investigators: John Haarstad, Evan Siemann, and David Tilman. Insects were sampled via sweep-net sampling, pitfalls and ant scent plates throughout the growing season in each of 49 grassland fields and savannas. In total, 89,596 individuals of 1,167 species were captured and enumerated. Body size was measured for a subset of grasshoppers collected. In 2004, John Haarstad conducted two similar studies by identifying and enumerating all insects collected in sweepnet samples taken in old fields (prairies) as part of E014 grasshopper studies and from sweepnet samples taken in savannas.
FIGURE 1 in Checklist of the false scorpions (Arachnida: Pseudoscorpiones) of Colombia, with new records and a key to the identification of the families
FIGURE 1. Dorsal habitus of the new records and range extension of false-scorpions from Colombia. A. Beierolpium venezuelense. B. Geogarypus amazonicus. C. Paratemnoides nidificator. D. Parachernes melonopygus. E. Sathrochthonius venezuelanus. F. Semeiochernes armiger. Scale bars = 500 µm.
FIGURE 7 in Qorimayus, a new genus of relictual, high-altitude harvestmen from western Argentina (Arachnida, Opiliones, Gonyleptidae) reveals trans-Andean phylogenetic links
FIGURE 7. Records of Qorimayus alticola (blue dots) in Sierra de Famatina, La Rioja Province, western Argentina, together with known localities of the Chilean genera Nanophareus (red dots) and Metabalta (yellow dots). Regional divisions in Chile: Coquimbo (COQ); Valparaíso (VAL); Región Metropolitana de Santiago (MET); Libertador General Bernardo O'Higgins (OHI); Maule (MAU); Ñuble (ÑUB); Bío-Bío (BIO). Inset: position of the represented area in South America; La Rioja Province indicated in gray.
FIGURE 6 in Qorimayus, a new genus of relictual, high-altitude harvestmen from western Argentina (Arachnida, Opiliones, Gonyleptidae) reveals trans-Andean phylogenetic links
FIGURE 6. Distal end of penis, lateral views. A: Metabalta efformata Roewer, 1929, syntype ♂ (SMF), B–C: Detail of stylus and ventral process of stylus (VPS); C is slightly rotated dorsolaterally to see the subapical spines on the VPS shaft. D: Nanophareus bosqenublado Hara et al., 2012 (AMNH), E: Detail of stylus and VPS, F: Nanophareus palpalis Roewer, 1929, ♂ lectotype (SMF 986/1). Scales: 0.1 mm.
FIGURE 4 in Qorimayus, a new genus of relictual, high-altitude harvestmen from western Argentina (Arachnida, Opiliones, Gonyleptidae) reveals trans-Andean phylogenetic links
FIGURE 4. Right pedipalps, lateral view; all drawings at the same scale. A: Qorimayus alticola (Ringuelet, 1962) comb. nov., holotype ♂ (MACN). B: Metabalta efformata Roewer, 1929, syntype ♂ (SMF). C: Metabalta geniculata Roewer, 1929, syntype ♂ (SMF) D: Nanophareus bosqenublado Hara et al., 2012 (AMNH). Scale bars: 1 mm.
FIGURE 1 in Qorimayus, a new genus of relictual, high-altitude harvestmen from western Argentina (Arachnida, Opiliones, Gonyleptidae) reveals trans-Andean phylogenetic links
FIGURE 1. Cladistic relationships of Qorimayus gen. nov.: single most parsimonious tree obtained with implied weights (IW), k=6 (Ci: 0.37, Ri: 0.60, tree length: 376 steps). Character optimization: solid circles depict non-homoplasious states, open circles are homoplasious states. Small numbers on a circle indicate the character number (above the circle) and its state (below); larger numbers under relevant branches display values of bootstrap, jackknife and symmetric resample (B-J-SR), high support values in bold. Abbreviations for major clades (underlined): G: Gonyleptidae; PsG: Pachyloides-group; PG: Pachylus-group; PG+Eu: Pachylus-group plus Eusarcus spp.; MG: Metabalta-group; M+Na(+): Metabalta+Na(+); M: genus Metabalta; Na(+): Nanophareus, plus N+T; Na: genus Nanophareus; e-s: "eyes-separate" clade.
FIGURE 2 in Qorimayus, a new genus of relictual, high-altitude harvestmen from western Argentina (Arachnida, Opiliones, Gonyleptidae) reveals trans-Andean phylogenetic links
FIGURE 2. Qorimayus alticola (Ringuelet, 1962) comb. nov., holotype ♂ (MACN). A: Dorsal view (scutum, free tergites, che- licerae, base of right pedipalp and legs I–III, and right leg IV, from coxa to tibia). B: Ventral view (coxae IV, stigmatic segment, free sternites, right trochanter, femur and patella I). C–D: Ocular mound, C: right lateral view with front hump, D: posterior view. Scale bars: 1 mm.
FIGURE 5 in Qorimayus, a new genus of relictual, high-altitude harvestmen from western Argentina (Arachnida, Opiliones, Gonyleptidae) reveals trans-Andean phylogenetic links
FIGURE 5. Qorimayus alticola (Ringuelet, 1962) comb. nov., holotype ♂, distal end of penis. A: Dorsal view. B: Lateral view. C: Detail of stylus and ventral process of stylus (VPS). Macrosetae series are labelled as MS A, MS B, MS C, MS D and MS E, following the nomenclature of Kury & Villarreal (2015). Scales: 0.1 mm.
FIGURE 8 in Qorimayus, a new genus of relictual, high-altitude harvestmen from western Argentina (Arachnida, Opiliones, Gonyleptidae) reveals trans-Andean phylogenetic links
FIGURE 8. Habitat of Qorimayus alticola in the Río Oro canyon (La Rioja Province, Argentina). A: General view of the valley at ca. 2400 m a.s.l. B: Scrubland bordering the track to Mina El Oro, at one collecting site (2450 m a.s.l.).
FIGURES 13‒17 in Spelaeobochica mahnerti, a new cave-dwelling pseudoscorpion from Brazil (Arachnida: Pseudoscorpiones: Bochicidae), with comments on the troglomorphism of the Brazilian bochicid species
FIGURES 13‒17. Type locality and habitat of Spelaeobochica mahnerti sp. n. 13, topographical map of Brazil, with Minas Gerais state highlighted, showing placement of the Bambuí Group (in blue); 14, topographical map of Minas Gerais state, with municipality of Monjolos indicated in red; 15, external landscape, showing region of the cave entrance (arrow); 16, map of Gruta Velha Nova, showing distribution of the specimens (red stars) observed during sampling; 17, inner portion of cave, the site where one of the specimens of S. mahnerti sp. n. was found (arrow).
FIGURES 5‒9 in Spelaeobochica mahnerti, a new cave-dwelling pseudoscorpion from Brazil (Arachnida: Pseudoscorpiones: Bochicidae), with comments on the troglomorphism of the Brazilian bochicid species
FIGURES 5‒9. Spelaeobochica mahnerti sp. n. 5, left chela of paratype, showing trichobothrial pattern, nodus ramosus, with some teeth amplified (holotype), antiaxial view, scale bar 1 mm; 6, distal marginal teeth of the fixed finger amplified, scale bar 0.1875 mm; 7, distal marginal teeth of the movable finger amplified, scale bar 0.1875 mm; 8, marginal and antiaxial accessory teeth at the proximal region of the fixed finger amplified, scale bar 0.1875 mm; 9, left palp, minus chela, of holotype, dorsal view, scale bar 1 mm.
FIGURE 18 in Spelaeobochica mahnerti, a new cave-dwelling pseudoscorpion from Brazil (Arachnida: Pseudoscorpiones: Bochicidae), with comments on the troglomorphism of the Brazilian bochicid species
FIGURE 18. Spelaeobochica mahnerti sp. n. and troglomorphisms in Spelaeobochica species. On the left, the male specimen (paratype) of S. mahnerti sp. n.; in the middle, a map of Brazil showing the different speleological units (red stars represent the locality of each species); on the right, from top to bottom, S. allodentatus, S. iuiu, S. goliath and S. muchmorei, respectively. Observe the increment in the degree of troglomorphism shown by Spelaeobochica species (greater appendage elongation) from northern to southern regions.
FIGURE 5 in A new Miopsalis from Mindanao supports a biogeographic umbilicus between Borneo and the southern Philippines (Arachnida: Opiliones: Cyphophthalmi: Stylocellidae)
FIGURE 5. Left: Schematic of complete phylogeny inferred from maximum likelihood analysis of four molecular loci (lnL = -41177.18), showing major groups of Opiliones. Right: Detail of phylogenetic relationships and geographical origins of Miopsalis specimens. Numbers on nodes indicate ultrafast bootstrap resampling frequencies.
FIGURE 4 in A new Miopsalis from Mindanao supports a biogeographic umbilicus between Borneo and the southern Philippines (Arachnida: Opiliones: Cyphophthalmi: Stylocellidae)
FIGURE 4. Miopsalis dilly sp. nov. (A) Spermatopositor, dorsal view. (B) Same, ventral view. (C) Detail of the gonopore complex. Scale bars as indicated.
FIGURE 2 in A new Miopsalis from Mindanao supports a biogeographic umbilicus between Borneo and the southern Philippines (Arachnida: Opiliones: Cyphophthalmi: Stylocellidae)
FIGURE 2. Miopsalis dilly sp. nov. (A) Male paratype, ventral view of prosomal complex. (B) Female paratype, same. (C) Male paratype, ventral view of posterior part of opisthosoma. (D) Female paratype, same. Scale bars: 500 µm.
FIGURE 1 in A new Miopsalis from Mindanao supports a biogeographic umbilicus between Borneo and the southern Philippines (Arachnida: Opiliones: Cyphophthalmi: Stylocellidae)
FIGURE 1. Miopsalis dillyi sp. nov. (A) Habitus of male holotype, dorsal view. (B) Same, ventral view. (C) Same, lateral view. (D) Habitus of female paratype, doral view. (E) Same, ventral view. (F) Same, lateral view. Scale bars as indicated.
FIGURE 3 in A new Miopsalis from Mindanao supports a biogeographic umbilicus between Borneo and the southern Philippines (Arachnida: Opiliones: Cyphophthalmi: Stylocellidae)
FIGURE 3. Miopsalis dilly sp. nov., details of limbs in retrolateral view. (A) Left chelicera of male paratype. (B) Right palp of male paratype. (C) Left leg I of male paratype. (D) Tarsus I of male paratype. (E) Right leg II of male paratype. (F) Left leg III of male paratype. (G) Right leg IV of male paratype. (H) Left leg IV of female paratype. (I) Tarsus IV of male paratype. (J) Tarsus I of female paratype (tarsal claw damaged during preparation). (K) Tarsus IV of female paratype. Scale bars: 500 µm.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
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