- Habitat Regions
are large bugs, up to 34 mm in length. They have concave wings on top of the abdomen and are reddish-brown in color. have a long narrow head with slender four-segmented antennae, compound eyes, and two ocelli present behind the eyes. The clypeus at the front of the head is broad at the top. have sucking mouthparts which fold back beneath the head and thorax when at rest. The mouthparts consist of long stylets that include a short labrum with a long tubular labium that contains the mandibles and the maxillae. The maxillae enclose a food canal for sucking fluid, and a salivary canal that injects saliva while biting a host.
- Sexual Dimorphism
- female larger
- Range length
- 34 (high) mm
- 1.34 (high) in
Nymph development occurs across five instars. The first, second, and third instars are non-feeding. During the fourth instar, nymphs begin to feed on blood from host tissues and assume adult behavior. (Ampleford and Davey, 1989; Roberts and Janovy, 2000)
- Development - Life Cycle
Males detect the presense of a nearby female by her fecal deposits. Mating often involves a complex behavioral pattern with many steps, including male vigilance, female advancement, gyration, copulation, and separation. (Ampleford and Davey, 1989; Roberts and Janovy, 2000)
are ectoparasitic solenophages that feed primarily on the blood of mammals and birds. have sucking mouthparts which fold back beneath the head and thorax when at rest. The mouthparts consist of long stylets that include a short labrum with a long tubular labium that contains the mandibles and the maxillae. The maxillae enclose a food canal for sucking fluid, and a salivary canal that injects saliva to help digest host tissue.
The saliva contains some anticoagulants, and the painless bites ofare usually around the eyes and mouth of the host, where they can suck blood for several minutes. Endosymbiotic bacteria help to digest the blood ingested by . The bacteria are contained in epithelial cells of the triatomine gut and are found among many of its tissues throughout its growth and maturation.
- Animal Foods
Economic Importance for Humans: Positive
There are no known economic benefits derived from.
Economic Importance for Humans: Negative
Trypanosoma cruzi, the agent of Chagas' disease, in northern South America. is also a vector for Trypanosoma (Herpetosoma) rangeli, which causes a common disease in dogs, cats and humans in Central America. The method of transmission is through feeding of, and fecal contamination by as it excretes its waste on the host while feeding. Millions of dollars are spent annually to eradicate Chagas' disease by improving unsanitary living conditions and screening all blood donors. (Garcia and Azambuja, 1991; Lange, et al., 1989; Tobie, 1965)are vectors for human disease. are the principle vector for
This species requires no special status and is not endangered.
Sara Diamond (editor), Animal Diversity Web.
Ramy Kurdi (author), University of Michigan-Ann Arbor, Teresa Friedrich (editor), University of Michigan-Ann Arbor.
living in the southern part of the New World. In other words, Central and South America.
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.
an animal that mainly eats meat
- causes disease in humans
an animal which directly causes disease in humans. For example, diseases caused by infection of filarial nematodes (elephantiasis and river blindness).
- causes or carries domestic animal disease
either directly causes, or indirectly transmits, a disease to a domestic animal
animals which must use heat acquired from the environment and behavioral adaptations to regulate body temperature
union of egg and spermatozoan
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.
- internal fertilization
fertilization takes place within the female's body
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.
active during the night
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
rainforests, both temperate and tropical, are dominated by trees often forming a closed canopy with little light reaching the ground. Epiphytes and climbing plants are also abundant. Precipitation is typically not limiting, but may be somewhat seasonal.
an animal that mainly eats blood
- scrub forest
scrub forests develop in areas that experience dry seasons.
reproduction that includes combining the genetic contribution of two individuals, a male and a female
living in residential areas on the outskirts of large cities or towns.
the region of the earth that surrounds the equator, from 23.5 degrees north to 23.5 degrees south.
- tropical savanna and grassland
A terrestrial biome. Savannas are grasslands with scattered individual trees that do not form a closed canopy. Extensive savannas are found in parts of subtropical and tropical Africa and South America, and in Australia.
A grassland with scattered trees or scattered clumps of trees, a type of community intermediate between grassland and forest. See also Tropical savanna and grassland biome.
- temperate grassland
A terrestrial biome found in temperate latitudes (>23.5° N or S latitude). Vegetation is made up mostly of grasses, the height and species diversity of which depend largely on the amount of moisture available. Fire and grazing are important in the long-term maintenance of grasslands.
living in cities and large towns, landscapes dominated by human structures and activity.
Ampleford, E., K. Davey. 1989. Egg laying in the insect Rhodnius prolixus is timed in a circadian fashion.. J. Insect Physiology, 35: 183-188.
Garcia, E., P. Azambuja. 1991. Development and interactions of Trypanosoma cruzi in insect vector.. Parasitology Today, 7: 240-244.
Lange, A., I. Orchard, F. Barrett. 1989. Changes in the hemolymph serotonin levels associated with feeding in the blood-sucking bug, Rhodnius prolixus.. J. Insect Physiology, 35: 393-400.
Roberts, L., J. Janovy. 2000. Foundations of Parasitology 6th edition. New York: McGraw-Hill.
Tobie, E. 1965. Biological factors influencing transmission of Trypanosoma rangeli by Rhodnius Prolixus.. J. Parasitology, 51: 837-841.