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A chelicerate Wnt gene expression atlas: novel insights into the complexity of arthropod Wnt-patterning
The Wnt genes represent a large family of secreted glycoprotein ligands that date back to early animal evolution. Multiple duplication events...
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The visual pathway in sea spiders (Pycnogonida) displays a simple serial layout with similarities to the median eye pathway in horseshoe crabs
BackgroundPhylogenomic studies over the past two decades have consolidated the major branches of the arthropod tree of life. However, especially...
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Expression of posterior Hox genes and opisthosomal appendage development in a mygalomorph spider
Spiders represent an evolutionary successful group of chelicerate arthropods. The body of spiders is subdivided into two regions (tagmata). The...
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Eggs to long-legs: embryonic staging of the harvestman Phalangium opilio (Opiliones), an emerging model arachnid
BackgroundThe comparative embryology of Chelicerata has greatly advanced in recent years with the integration of classical studies and genetics,...
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Lack of evidence for conserved parasegmental grooves in arthropods
In the arthropod model species Drosophila melanogaster , a dipteran fly, segmentation of the anterior–posterior body axis is under control of a...
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Comparative anatomy of the rostrosoma of Solifugae, Pseudoscorpiones and Acari
We compare the microscopic anatomy of the mouthparts of representative species of Solifugae, Pseudoscorpiones and Parasitiformes (Acari)....
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The Cabrières Biota (France) provides insights into Ordovician polar ecosystems
Early Palaeozoic sites with soft-tissue preservation are predominantly found in Cambrian rocks and tend to capture past tropical and temperate...
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Early segmentation in the mite Archegozetes longisetosus reveals conserved and derived aspects of chelicerate development
The arthropod body plan is comprised of several repeating segments along the anteroposterior body axis. This high degree of conservation, however,...
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A microCT-based atlas of the central nervous system and midgut in sea spiders (Pycnogonida) sheds first light on evolutionary trends at the family level
BackgroundPycnogonida (sea spiders) is the sister group of all other extant chelicerates (spiders, scorpions and relatives) and thus represents an...
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Genomic resources and toolkits for developmental study of whip spiders (Amblypygi) provide insights into arachnid genome evolution and antenniform leg patterning
BackgroundThe resurgence of interest in the comparative developmental study of chelicerates has led to important insights, such as the discovery of a...
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Correction to: Mandibulate convergence in an armoured Cambrian stem chelicerate
The original article [1] had 4 paragraphs which contained erroneous information. In this correction article the correct and incorrect information is...
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Developmental gene expression as a phylogenetic data class: support for the monophyly of Arachnopulmonata
Despite application of genome-scale datasets, the phylogenetic placement of scorpions within arachnids remains contentious between two different...
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Implications of a cheliceral axial duplication in Tetragnatha versicolor (Araneae: Tetragnathidae) for arachnid deuterocerebral appendage development
The homology of the arachnid chelicera with respect to other head appendages in Panarthropoda has long been debated. Gene expression data and the...
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Mandibulate convergence in an armoured Cambrian stem chelicerate
BackgroundChelicerata represents a vast clade of mostly predatory arthropods united by a distinctive body plan throughout the Phanerozoic. Their...
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Laboratory breeding and rearing of cellar spider, Crossopriza lyoni Blackwall
Spiders have emerged as one of the leading model organisms in many research fields due to their compelling biology. Often, scientific investigations...
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Morphology of Ovaries and Oogenesis in Chelicerates
The subphylum Chelicerata represents one of the oldest groups among arthropods and comprises more than a dozen orders. Representatives of particular...
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A chelicerate-specific burst of nonclassical Dscam diversity
BackgroundThe immunoglobulin (Ig) superfamily receptor Down syndrome cell adhesion molecule ( Dscam ) gene can generate tens of thousands of isoforms...
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Genomic insights into mite phylogeny, fitness, development, and reproduction
BackgroundPredatory mites (Acari: Phytoseiidae) are the most important beneficial arthropods used in augmentative biological pest control of...
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On the Origin of Hard Ticks (Parasitiformes, Ixodidae)
AbstractDifferent hypotheses on the origin of hard ticks, vectors of numerous dangerous infectious diseases of humans and animals, are analyzed with...
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Lineage-specific, fast-evolving GATA-like gene regulates zygotic gene activation to promote endoderm specification and pattern formation in the Theridiidae spider
BackgroundThe process of early development varies across the species-rich phylum Arthropoda. Owing to the limited research strategies for dissecting...
