Though the primary host of white-tailed deer, is found throughout the United States, extending into Canada and Mexico, this parasite is primarily found on the deer that reside in the southern states, such as Mississippi and Texas (Watson and Anderson, 1974). However, this species has also been found in three provinces in Canada, as well as seventeen other states in southern United States (Price and Graham, 1997). (Price and Graham, July 1997; Watson and Anderson, 1975), the
Odocoileus virginianus subspecies (Watson and Anderson, 1975). Odocoileus hemionus, the mule deer, is also a known host (Price and Graham, 1997). These lice prefer deer that reside in relatively warm temperate areas. (Price and Graham, July 1997; Watson and Anderson, 1975)is found on
- Habitat Regions
- Other Habitat Features
Many researchers believe that lice descended from insects in the order Psocoptera, a very similar looking, though not parasitic, group of insects. Unlike their believed ancestor, all lice are adapted to a parasitic lifestyle in their loss of ancestral wings, as well as being dorsoventrally flattened (Plane and Crosskey, 1993). The head of all lice in the suborder Ischnocera is wider than the neck, and all lice in the order Mallophaga have manidbles adapted for chewing. is no exception.
Adults of this species range from 2.5 to 2.75 mm long (Price and Graham, 1997). The basal plate of the male's genitalia extends to the fifth abdominal segment, in contrast to the basal plate of the female's genitalia, which is found only on the last abdominal segment (Price and Graham, 1997).
The antennae are consistent with the rest of the suborder Ischnocera in their filiform (thin and linear) structure. Each antenna is made up of three to five segments, with a style at the tip. The male's antennae are modified as holding structures used during reproduction (Lane and Crosskey, 1993). (Lane and Crosskey, 1993; Price and Graham, July 1997)
- Sexual Dimorphism
- sexes shaped differently
- Range length
- 2.5 to 2.75 mm
- 0.10 to 0.11 in
is a hemimetabolous species, exhibiting three life stages: egg, nymph, and adult. The time it takes the eggs to hatch depends on body temperature of the host, and external environmental conditions. Once the eggs hatch, the nymphs go through approximately three instars (the length and number also depending on external conditions). The mature adult that develops is ready for reproduction.
- Development - Life Cycle
No information is available on the mating system of these lice.
Female lice lay up to 100 eggs throughout their lifetime. Each is stuck to the hair of the host using a special glue secreted directly before secreting the egg, also known as a "nit." Eggs are very resistant to removal, desiccation, or destruction.
- Key Reproductive Features
- seasonal breeding
- gonochoric/gonochoristic/dioecious (sexes separate)
- Breeding season
- Most breeding takes place in the winter months, between November and April
Female lice provide nutrients to their eggs before they are laid, and then they abandon them.
- Parental Investment
No information is available on the lifespan of these lice.
is very host specific. Once on a host, unless the host dies or is in close contact with another animal, these lice tend to stay within one species, and almost always on one host (Kocan, 2001).
Communication and Perception
Lice have short antennae with chemoreceptors and tactile hairs. No information is available on how these lice communicate with one another.
Tricholipeurus parallelus, occupy the same host as . Watson and Anderson therefore came to the conclusion that "the temporal separation in abundance of these two species may (be) the result of competition or regulatory environmental factors..." (1975). (Watson and Anderson, 1975)may compete with other deer parasites for resources on the host. Between May and October, when populations of are very low, the adults of another species of louse,
- Ecosystem Impact
- deer in the genus Odocoileus
Economic Importance for Humans: Negative
These lice, as well as most of the parasites on these deer, are not easily transmitted to domestic animals, and don't tend to survive well. However, in the rare case that they do,does not harm its new host (Kocan, 2001). is therefore not a vector for any pathogen transmittable to humans.
Many studies which have followed white-tailed deer and their parasites have noted that these parasites in particular, unless densely inhabiting the host, do not cause serious damage, if any at all (Demarais et al., 1987; Davidson et al., 1981). In fact, normal healthy white-tailed deer in Canada were noted to each have between 14,000 and 70,000 chewing lice on their bodies (Price and Graham 1997). (Davidson, et al., 1981; Demarais, et al., 1987; Kocan, 2001; Price and Graham, July 1997)
Allison Poor (editor), University of Michigan-Ann Arbor.
Gayle Soskolne (author), University of Michigan-Ann Arbor, Barry OConnor (editor), University of Michigan-Ann Arbor.
living in the Nearctic biogeographic province, the northern part of the New World. This includes Greenland, the Canadian Arctic islands, and all of the North American as far south as the highlands of central Mexico.
living in landscapes dominated by human agriculture.
- bilateral symmetry
having body symmetry such that the animal can be divided in one plane into two mirror-image halves. Animals with bilateral symmetry have dorsal and ventral sides, as well as anterior and posterior ends. Synapomorphy of the Bilateria.
Found in coastal areas between 30 and 40 degrees latitude, in areas with a Mediterranean climate. Vegetation is dominated by stands of dense, spiny shrubs with tough (hard or waxy) evergreen leaves. May be maintained by periodic fire. In South America it includes the scrub ecotone between forest and paramo.
uses smells or other chemicals to communicate
animals which must use heat acquired from the environment and behavioral adaptations to regulate body temperature
forest biomes are dominated by trees, otherwise forest biomes can vary widely in amount of precipitation and seasonality.
having a body temperature that fluctuates with that of the immediate environment; having no mechanism or a poorly developed mechanism for regulating internal body temperature.
offspring are produced in more than one group (litters, clutches, etc.) and across multiple seasons (or other periods hospitable to reproduction). Iteroparous animals must, by definition, survive over multiple seasons (or periodic condition changes).
A large change in the shape or structure of an animal that happens as the animal grows. In insects, "incomplete metamorphosis" is when young animals are similar to adults and change gradually into the adult form, and "complete metamorphosis" is when there is a profound change between larval and adult forms. Butterflies have complete metamorphosis, grasshoppers have incomplete metamorphosis.
having the capacity to move from one place to another.
- native range
the area in which the animal is naturally found, the region in which it is endemic.
reproduction in which eggs are released by the female; development of offspring occurs outside the mother's body.
an organism that obtains nutrients from other organisms in a harmful way that doesn't cause immediate death
- scrub forest
scrub forests develop in areas that experience dry seasons.
- seasonal breeding
breeding is confined to a particular season
uses touch to communicate
that region of the Earth between 23.5 degrees North and 60 degrees North (between the Tropic of Cancer and the Arctic Circle) and between 23.5 degrees South and 60 degrees South (between the Tropic of Capricorn and the Antarctic Circle).
Burgess, N., G. Cowan. 1993. A Colour Atlas of Medical Entomology. London, UK: Chapman & Hall Medical.
Davidson, W., F. Hayes, V. Nettles, F. Kellogg. 1981. Disease and Parasites of White-Tailed Deer. Tallahassee, Florida: Tall Timbers Research Station.
Demarais, S., H. Jacobson, D. Guynn. 1987. Effects of season and area on ectoparasites of white-tailed deer (Odeocoileus virginianus) in Mississippi. Journal of Wildlife Diseases, 23(2): 261-266.
Kocan, A. 2001. Parasitic and infectious diseases of white-tailed deer in Oklahoma. Journal of Veterinary Medicine, 13(1): 23-30.
Lane, R., R. Crosskey. 1993. Medical Insects and Arachnids. London, UK: Chapman & Hall.
Price, M., O. Graham. July 1997. Chewing and sucking lice as parasites of mammals and birds. United States Department of Agricultrue, Technical Bulletin #1849.
Watson, T., R. Anderson. 1975. Seasonal changes in louse populations on white-tailed deer (Odocoileus virginianus). Canadian Journal of Zoology, 53: 1047-1054.
Webster, W., R. Stewart. 1964. Tricholipeurus lipeuroides from a white-tailed deer in Quebec. Canadian Journal of Zoology, 42: 323.