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7 results for “Palpimanoidea”
FIGURE 2. Seppo koponeni n. gen. & n in The first fossil spider (Araneae: Palpimanoidea) from the Lower Jurassic (Grimmen, Germany)
FIGURE 2. Seppo koponeni n. gen. & n. sp. Holotype and only known specimen MB.A 2966. Explanatory drawing to accompany Figure 1. Scale bar = 1 mm.
FIGURE 1. Seppo koponeni n. gen. & n in The first fossil spider (Araneae: Palpimanoidea) from the Lower Jurassic (Grimmen, Germany)
FIGURE 1. Seppo koponeni n. gen. & n. sp. Holotype and only known specimen MB.A 2966. A, photograph of dry specimen in low-angle light, ventral. B, photograph under 70% ethanol and cross-polarized light. Scale bars = 1 mm.
FIGURE 3. Seppo koponeni n. gen. & n in The first fossil spider (Araneae: Palpimanoidea) from the Lower Jurassic (Grimmen, Germany)
FIGURE 3. Seppo koponeni n. gen. & n. sp. Holotype and only known specimen MB.A 2966. A, cheliceral furrow showing base of fang and row of?promarginal peg teeth. B, distal end of metatarsus I, retrolateral, showing bristle-like macrosetae and trichobothrium, and pedipalp tarsus showing toothed terminal claw. C, metatarsus of right leg IV, prolateral, showing rows of bristles and distal pair of curved bristles. All photographs taken under 70% ethanol and in cross-polarized light.
Dataset for: Burma terrane amber fauna shows connections to Gondwana and transported Gondwanan lineages to the northern hemisphere (Araneae: Palpimanoidea)
<p class="MsoNormal">Burmese amber is a significant source of fossils that documents the mid-Cretaceous biota. This deposit was formed around 99 Ma on the Burma Terrane, which broke away from Gondwana and later collided with Asia, although the timing is disputed. Palpimanoidea is a dispersal-limited group that was a dominant element of the Mesozoic spider fauna, and has an extensive fossil record, particularly from Burmese amber. Using morphological and molecular data, evolutionary relationships of living and fossil Palpimanoidea are examined. Divergence dating with fossils as terminal tips, followed by ancestral range estimations, shows timing of diversification is contemporaneous with continental break-up and that widespread ancestral ranges divide into lineages that inherit different Pangean fragments, consistent with vicariance. Our results suggest that the Burmese amber fauna has ties to Gondwana due to a historical connection in the Early Cretaceous, and that the Burma Terrane facilitated biotic exchange by transporting lineages from Gondwana into the Holarctic in the Cretaceous.</p>
Dataset for: Burma terrane amber fauna shows connections to Gondwana and transported Gondwanan lineages to the northern hemisphere (Araneae: Palpimanoidea)
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Data from: Next-generation museum genomics: phylogenetic relationships among palpimanoid spiders using sequence capture techniques (Araneae: Palpimanoidea)
Historical museum specimens are invaluable for morphological and taxonomic research, but typically the DNA is degraded making traditional sequencing techniques difficult to impossible for many specimens. Recent advances in Next-Generation Sequencing, specifically target capture, makes use of short fragment sizes typical of degraded DNA, opening up the possibilities for gathering genomic data from museum specimens. This study uses museum specimens and recent target capture sequencing techniques to sequence both Ultra-Conserved Elements (UCE) and exonic regions for lineages that span the modern spiders, Araneomorphae, with a focus on Palpimanoidea. While many previous studies have used target capture techniques on dried museum specimens (for example, skins, pinned insects), this study includes specimens that were collected over the last two decades and stored in 70% ethanol at room temperature. Our findings support the utility of target capture methods for examining deep relationships within Araneomorphae: sequences from both UCE and exonic loci were important for resolving relationships; a monophyletic Palpimanoidea was recovered in many analyses and there was strong support for family and generic-level palpimanoid relationships. Ancestral character state reconstructions reveal that the highly modified carapace observed in mecysmaucheniids and archaeids has evolved independently.
Data from: Next-generation museum genomics: phylogenetic relationships among palpimanoid spiders using sequence capture techniques (Araneae: Palpimanoidea)
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