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Trichodectes canis
''Trichodectes canis'', also known as canine chewing louse, is a chewing louse found on domesticated dogs and wild canids throughout the world. ''T. canis'' is a well-known vector for the dog tapeworm, ''Dipylidium caninum''. ''T. canis'' usually does not present any major problems to the host, however, can be very irritating in heavy infestations. In North America and most developed countries, ''T. canis'' infestation of domesticated dogs is very uncommon as long as they are properly cared for and healthy. Poorly taken care of dogs are more prone to getting a lice infestation.
== Description ==
''Trichodectes canis'' is a louse of the suborder Mallophaga, or chewing lice. ''T. canis'' is a small, flat-bodied louse. Males are typically smaller than females, with body lengths ranging from 1.60 to 1.68 mm in males and 1.75 to 1.82 mm in females. Females also differ from males in the fact that they possess a special organ that is located from underneath the end of the abdomen. This organ, when seen from above, resembles two bowed appendages on either side of the genital region. This organ serves two purposes – in helping to glue the eggs to hosts’ fur, and to grasp fur in order to remain on the host. As a member of the genus ''Trichodectes'', ''T. canis'' usually have antennae with three segments and a single claw at each tarsus. The mouthparts of the ''T. canis'' include a pair of mandibles lacking the maxillary palps. In addition, ''T. canis'' possess a pair of degenerate eyes and hair-like appendages from their antennae that function for perception. Other physical features include being ectothermic, possessing bilateral symmetry, and polymorphic.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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