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from article Piciformes
Red-headed woodpecker (Melanerpes erythrocephalus) in Desoto National Wildlife Refuge, Iowa. (Photo by Dave Menke/U.S. Fish and Wildlife Service)
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from article Otter
North American river otter (Lontra canadensis). (Credit: Alan and Sandy Carey/Getty Images)
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from article Otter
Sea otter (Enhydra lutris) in the water off the coast of Moss Landing, California. (Credit: Lilian Carswell/U.S. Fish and Wildlife Service)
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from article Pain
Neurophysiology of incoming pain. Sensation from peripheral receptors travels along specific pain nerves, and is modulated throughout the spinal cord and brain. (Copyright © McGraw-Hill Education)
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from article Echiura
Echiuran anatomy. (a) External anatomy, ventral view. (b) Internal anatomy, dorsal view. A, anus; AV, anal vesicles; G, gut (middle section removed for clarity); M, mouth; N, nephridia (egg and sperm storage organs); S, setae; VNC, ventral nerve…
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from article Schizomida
Schizomus sawadai. (After K. Sekiguchi and T. Yamasaki, A redescription of “Trithyreus sawadi” (Uropygi: Schizomidae) from the Bonin Islands, Acta Arachnol., 24(2):73–81, 1972)
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from article Virus, defective
Image
from article Virus, defective
Electron micrographs of virion and defective interfering particles of vesicular stomatitis virus. (a) Defective interfering particle with a 50% deleted RNA. (b) Defective interfering particle with an 85% deleted RNA. (c, d, f) Defective interfering…
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from article Notomyotida
Some diagnostic features of representative Notomyotida. (a) Paxillae and one pectinate pedicellariae of Cheiraster richardsoni. (b) Benthopecten pentacanthus.
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from article Jerboa
Jerboa. (Credit: Pekka Fågel)
