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Z250 - Lec30 Outline- Arthropoda V- Chelicerata (2007).
63004
Z250 - Lec30 Outline- Arthropoda V- Chelicerata (2007).
http://www.biology.ualberta.ca/courses.hp/zool250/LecOutl/outl30.htm
very reduced abdomen - typically have 1 pair chelicerae (3-segmented), 1 pair ovigers, 4 pair walking legs, and simple eyes - unusual reproductive biology: males brood embryos on special legs (ovigers); only arthropod group with sole male parental care!
Biology > Biota > Fauna > Arthropoda > Chelicerata
mites and ticks tagmata male parental care abdomen sea spiders living fossils horseshoe crabs compound eyes body form
Jan 1, 2007
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Other links at Biology > Biota > Fauna > Arthropoda > Chelicerata
ANIMAL BYTES - Chelicerata...Find quick information and fun facts about animals.
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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 Cheliceramorpha includes spiders and scorpions, mites and ticks, horseshoe crabs, daddy-longlegs, and extinct "sea-scorpions".
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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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The authors examined the distribution and dispersal histories of Eurypterida in a phylogenetic and palaeogeographic context.
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Chelicerata Fossils Fossil Pictures Fossils of Phylum Arthropoda Subphylum Chelicerata Of related interest: Subphylum Chelicerata Aglaspid Arthropod Class: Merostomata Weeks Formation Millard County, Utah Eurypterus remipes Class Merostomata Upper Silurian Bertie Group, New York Euproops Horse
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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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very reduced abdomen - typically have 1 pair chelicerae (3-segmented), 1 pair ovigers, 4 pair walking legs, and simple eyes - unusual reproductive biology: males brood embryos on special legs (ovigers); only arthropod group with sole male parental care!
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The authors investigated sperm dimorphism as a rare phenomenon in Chelicerata.
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