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461 results for “harvestmen”
Fig. 8 in On harvestmen from the Soutpansberg, South Africa, with description of a new species of Monomontia (Arachnida: Opiliones)
Fig. 8. Monomontia, ơ palps: (A, B) M. aquilonaris, Lajuma; (C–H) M. versicolor: (C, D) Lajuma, (E, F) Mariepskop, (G, H) Makhado; (I, K) M. neglecta sp. n., Makhado. (A, B, I) palpus, (C–H, K) femur of palp; (B, D, F, H, K) lateral view, (A, I) medial view, (C, E, G) ventral view. Scale bar = 0.5 mm.
Fig. 10 in On harvestmen from the Soutpansberg, South Africa, with description of a new species of Monomontia (Arachnida: Opiliones)
Fig. 10. Monomontia, glans penes: (A–F) M. versicolor: (A, B) Makhado, (C, D) Lajuma, (E, F) Mariepskop; (G, H) M. aquilonaris, Lajuma; (I, K) M. neglecta sp. n., Makhado. (A, C, E, G, I) lateral and (B, D, F, H, K) dorsal views. Scale bar = 0.1 mm.
Fig. 3 in On harvestmen from the Soutpansberg, South Africa, with description of a new species of Monomontia (Arachnida: Opiliones)
Fig. 3. General habitus of harvestmen from Lajuma: (A, B) Metabiantes leighi ^and ơ; (C, D) Graemontia bicornigera ^; (A, D) lateral aspect; (B, C) dorsal aspect. Scale bars = 1.0 mm.
Fig. 6 in On harvestmen from the Soutpansberg, South Africa, with description of a new species of Monomontia (Arachnida: Opiliones)
Fig. 6. Monomontia, ơ headcaps, lateral view: (A–D) M. versicolor: (A, B) Mariepskop, holotype and paratype, (C) Lajuma, (D) Makhado; (E–H) M. aquilonaris, Lajuma, different individuals; (I) M. neglecta sp. n., Makhado. Scale bars = 0.2 mm, bottom left for A–D; at H for E–H; at I for I.
Fig. 4 in On harvestmen from the Soutpansberg, South Africa, with description of a new species of Monomontia (Arachnida: Opiliones)
Fig. 4. Graemontia bicornigera ^, Lajuma (A–E, G, H) and holotype, Mariepskop (F); (A) medial and (B–E) lateral aspects: (A, B) chelicerae; (C) ocularium, scale bar 0.1 mm; (D) palpus; (E) leg I; (F) penis, ventrolateral view, scale bar 0.2 mm. Scale bars: top left 0.2 mm, for A, B; bottom right 0.2 mm for D, E.
Fig. 5 in On harvestmen from the Soutpansberg, South Africa, with description of a new species of Monomontia (Arachnida: Opiliones)
Fig. 5. Monomontia, general habitus, dorsal (A, B, D–F, H) and lateral (C, G, I) views: (A–D) M. aquilonaris, Lajuma: (A) ơ, (C, D) ^; (E–G) M. versicolor ơ: (E) holotype, Mariespskop, (F, G) Lajuma; (H, I) M. neglecta sp. n., Makhado. Scale bars = 1.0 mm; scale bar top left for A, B, E, F; at H for H and I.
Fig. 1 in On harvestmen from the Soutpansberg, South Africa, with description of a new species of Monomontia (Arachnida: Opiliones)
Fig. 1. Collecting sites, Soutpansberg mountain range, Limpopo Province, South Africa: (A) Farm Lajuma, (B) Hanglip Forest north of Makhado (Louis Trichardt), (C) Entabeni Forest near Entabeni, 30 km east of Makhado.
Fig. 2 in On harvestmen from the Soutpansberg, South Africa, with description of a new species of Monomontia (Arachnida: Opiliones)
Fig. 2. Metabiantes leighi ơ, Lajuma: (A) chelicerae, (B) palpus, (C) penis, (D–G) glans penis, (F, G) expanded view. (A, B, E, F) lateral aspect, (C, D, G) dorsal aspect. Scale bars: top left 0.2 mm for A, B; bottom left 0.2 mm for C; bottom right 0.1 mm for D–G.
Individual and species variation in mixed-species aggregations of harvestmen
<p>This dataset is associated with the published paper Escalante, I, M Domínguez, D Gómez-Ruiz, and G Machado. Benefits and costs of multi-specific aggregations in harvestmen (Arachnida: Opiliones). Frontiers in Ecology and Evolution (DOI 10.3389/fevo.2021.766323). Please refer to the paper for the extensive explanations on the collection, analysis, presentation, and analyses of the data. </p> <p>We provide the first description of mixed-species roosting aggregations of seven species of the genus <em>Prionostemma </em>from Costa Rica. We surveyed several plants (trees and palms) for the presence of harvestmen of seven different species across time (14 days). These harvestmen are frequently found in aggregations. Hence, we also counted the number of individuals in each aggregation. Additionally, we counted the number of legs in each harvestmen, as well as the number of parasitic mite larvae found in the harvestmen's bodies. With all of this information, we were able to explore the effects of the roosting status (solitary/aggregated), the aggregation size, and the species composition of the aggregations (single- or multi-species aggregations) with potential benefits (less damage, i.e., individuals with all of their legs) and costs (a higher parasitic infection).</p>
Temperature and mating in harvestmen
<p>Temperature impacts a wide range of mating behaviours, particularly in ectothermic organisms that tend to havebody temperatures similar to ambient thermal conditions. Here, we test the effects of thermal variation on precopulatory and copulatory behaviour in the harvester <em>Leiobunum politum</em> Weed 1889, which belongs to the group commonly known as daddy longlegs. We ran single choice mating trials across temperatures commonly experienced in the field during the mating season (18 - 34 °C) across two years. We tested how temperature affected the likelihood to move, attempt to mate, and successfully mate, as well as the duration of copulation. Mating was highest at low to intermediate temperatures, and the temperature at which peak mating rates occurred varied across years. The wide range of temperatures across which <em>L. politum</em> are found to mate reflect thermal variability in the field and the flexibility in mating behaviour in this fascinating animal.</p>
Temperature and mating in harvestmen
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Data from: Population genomics and geographical parthenogenesis in Japanese harvestmen (Opiliones, Sclerosomatidae, Leiobunum)
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Individual and species variation in mixed-species aggregations of harvestmen
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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.).
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