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The First Arthropods.
62869
The First Arthropods.
http://www.cals.ncsu.edu/course/ent425/text02/arthropods.html
A variety of marine worms (Annelida and Protoannelida) lived in the ocean sediments during the Cambrian period. These creatures were bilaterally symmetrical, soft-bodied, and multisegmented. They had no distinct head capsule and lacked both eyes and antennae.
Biology > Biota > Fauna > Arthropoda
arthropods myriapods mouthparts centipedes horseshoe crabs appendages polyphyletic millipedes exoskeleton body segment
Jan 1, 2007
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Other links at Biology > Biota > Fauna > Arthropoda
Many arthropods have adopted the parasitic way of life. Depending on your definition of parasitism, something between 15 and 50% of insect species are either parasitic or have parasitic stages in their life cycle. Some groups of parasitic arthropods are more economically important than others.
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3. Arthropoda.
The arthropods are far and away the dominant form of life on earth today, and presumably were so in the past as well. Most lack a mineralized skeleton, which probably accounts for their typically poor fossil record. There are, however, taxa within the Arthropoda with fair to quite good records.
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Stunning insect macrophotography combined with informative descriptions. Browse through the database and develop a respect and appreciation for these extraordinary animals.
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Educator, Lisa Schwartz, ToL Learning Materials Editor; Entomologist Carl Olson, Associate Curator for the University of Arizona Department of Entomology and Entomologist Kim Franklin, PhD student in the Interdisciplinary Program in Insect Science.
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Photographs and movies of insects and the damage they cause. From Iowa State University Entomology.
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C lassification of A rthropods/ I nsects Dr. Adams Entomology Biology 1224 Phylum Arthropoda Arthropods Subphylum Trilobita Trilobites (extinct) Subphylum Chelicerata Chelicerates Class Merostomata Horseshoe Crabs Class Arachnida Spiders, Scorpions, Ticks, Chiggers, Mites Class
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Annelids and Arthropods Phylum Annelida Class Polychaeta Ex: Nereis sp. Class Oligochaeta Ex: Earthworm Class Hirundinea Ex: leech Phylum Arthropoda
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10. Insects and More
