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Physokermes Hemicryphus
''Physokermes'' are a genus of scale insects known as the bud scales. They are restricted to the Holarctic, though ''Physokermes hemicryphus'' has been introduced to North America. Some species are plant pests. Morphology Pre-reproductive females are membranous and reddish-brown, once females begin to lay eggs they are globular or kidney-shaped become light to dark brown, and eventually heavily sclerotized. The adult females resemble the bud of their coniferous hosts, hence the name bud scale. ''Physokermes'' are difficult to identify to species, as only pre-reproductive females can be used. Once females begin to oviposit, their bodies become distorted and it is not possible to detect the morphological features necessary to identify them to species. Species There are 13 described species in the genus ''Physokermes'': *''Physokermes coloradensis'' Cockerell 1895 *''Physokermes concolor'' Coleman 1903 - fir bud-scale *'' Physokermes fasciatus''Borchsenius 1957 *'' Physoke ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animal
Animals are multicellular, eukaryotic organisms in the Kingdom (biology), biological kingdom Animalia. With few exceptions, animals Heterotroph, consume organic material, Cellular respiration#Aerobic respiration, breathe oxygen, are Motility, able to move, can Sexual reproduction, reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of Cell (biology), cells, the blastula, during Embryogenesis, embryonic development. Over 1.5 million Extant taxon, living animal species have been Species description, described—of which around 1 million are Insecta, insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have Ecology, complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a Symmetry in biology#Bilate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
