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Double spermatogenesis in Chelicerata.
63013
Double spermatogenesis in Chelicerata.
http://www.ncbi.nlm.nih.gov/pubmed/15549701
The authors investigated sperm dimorphism as a rare phenomenon in Chelicerata.
Biology > Biota > Fauna > Arthropoda > Chelicerata
animals arthropods male phylogeny sexual behavior animal spermatogenesis spermatozoa testis urogenital system
Jan 1, 2005
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Other links at Biology > Biota > Fauna > Arthropoda > Chelicerata
The 75000 species within this subphylum belong to three diverse classes. The Classes Merostomata and Pycnogonida include relatively minor, aquatic organisms, the Class Arachnida comprises the vast majority of species (74000 + ) and includes spiders, scorpions, mites and ticks.
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Comment Citation: Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2006. The Animal Diversity Web (online). Accessed June 07, 2007 at http://animaldiversity.org.
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The arthropod group Chelicerata includes animals as diverse as spiders, scorpions, mites, ticks and horseshoe crabs. In addition to these well-known living animals, it includes important extinct groups such as the eurypterids (sea "scorpions").
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The authors investigated sperm dimorphism as a rare phenomenon in Chelicerata.
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The authors examined the distribution and dispersal histories of Eurypterida in a phylogenetic and palaeogeographic context.
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Cheli. 1 i Subphylum CHELICERATA i Questo subphylum dartropodi i fa parte dei Merostomata i, oggi rappresen- tati da soli tre generi, che vivono in ambienti marini marginali.
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Fossils on display, Geological Museum, University of Oslo, Norway: Chelicerata showcase
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The authors state that arthropods have the capacity of recognizing self from non-self in various defense phenomena including hemolymph clotting, phagocytosis, encapsulation, melanization and clearance of the foreign matter which must be initiated by a first step of molecular recognition.
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This review analyses the mechanisms of neurogenesis, the morphology of serotonergic interneurons, the number of motoneurons, and cellular features and development of the lateral eyes of Chelicerata.
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