Little information is available regarding communication and perception of seven-banded armadillos, but their close relative nine-banded armadillos have poor eyesight and therefore rely on their keen sense of smell. This sense of smell allows them to efficiently forage under leaf and grass litter. Olfactory senses are also used for mate selection and sibling recognition.
Other Communication Modes: scent marks
Perception Channels: visual ; tactile ; chemical
Seven-banded armadillos are listed on the IUCN Red List as least concern
US Federal List: no special status
CITES: appendix i
IUCN Red List of Threatened Species: least concern
Seven-banded armadillos may burrow underneath manmade structures causing supporting soils to become instable.
Negative Impacts: household pest
Seven-banded armadillos consume vast amounts of termites and other insects considered as pests to humans. They are also used as subjects for leprosy medical research.
Positive Impacts: source of medicine or drug ; controls pest population
Seven-banded armadillos are scavengers, consuming a wide variety of invertebrates as well as carrion and occasionally plants. Primarily insectivorous, seven-banded armadillos control insect populations.
Seven-banded armadillos are generally considered insectivores, although they could also be considered slightly omnivorous as they occasionally eat plants and other types of animal foods. Their diet mainly consists of insects such as ants, beetles, wasps, caterpillars, roaches, termites, and larvae. They may also eat other organisms such as small reptiles, amphibians, and even bird carcasses.
Animal Foods: birds; mammals; amphibians; reptiles; carrion ; insects; terrestrial non-insect arthropods
Primary Diet: carnivore (Insectivore ); omnivore
The distribution of seven-banded armadillos Dasypus septemcinctus is limited to the South American Continent. Their geographical range in the neotropical region extends from the lower Amazonian Basin of Brazil to the Gran Chaco of Bolivia, Paraguay and northern provinces of Argentina: Salta, Formosa, and Chaco.
Biogeographic Regions: neotropical (Native )
Seven-banded armidillos inhabit grasslands, with the exception of southeastern Brazil, where they can be found in the gallery forests.
Habitat Regions: terrestrial
Terrestrial Biomes: savanna or grassland
Other Habitat Features: riparian
The maximum lifespan reported for one specimen of seven-banded armadillos in captivity was observed to be 16.8 years. Other information is limited in availability.
Range lifespan
Status: captivity: 16.8 (high) years.
The most distinct physical characteristic of armadillos, Dasypodidae, is the carapace that resembles gray or brown armor. The carapace is made of ossified dermal plates that resemble a thick hardened skin. The majority of an armadillo's body is covered with the carapace, with the exception of the abdomen region. Seven-banded armadillos have thick-skinned abdomens with hair yellow and/or white in appearance. The carapace itself is divided into three sections: a scapular shield, a pelvic shield, and a series of bands around the midsection. Seven-banded armadillos have 6 to 8 bands located in the midsection of the carapace. Nine-banded armadillos, Dasypus novemcinctus, a close relative to the seven-banded armadillo, have 7 to 11 bands.
Nine-banded armadillos, are similar in appearance to seven-banded armadillos, though nine-banded armadillos are larger in body size and typically have two more bands in the midsection of the carapace. Seven-banded armadillos are the smallest of g. Dasypus with an average mass of 1.63 kg. Head and body length averages 269 mm while the tail measures an additional 147 mm. Seven-banded armadillos have 4 digits on their forefeet and 5 digits on their hind feet. The ears are about half the size of their head, and they have a long flattened snout used to forage for insects.
Average mass: 1.47 kg.
Average length: 416 mm.
Sexual Dimorphism: sexes alike
Other Physical Features: endothermic ; bilateral symmetry
Little information is available regarding predation of seven-banded armadillos. When pursued, seven-banded armadillos usually run and wedge themselves in a burrow ensuring their abdomen region is protected from predation. Seven-banded armadillos are not hunted by humans as heavily as nine-banded armadillos because of their small size.
Known Predators:
Little information is available regarding mating systems of seven-banded armadillos. However, their close relatives, nine-banded armadillos, exhibit a polygynous mating system where the male mates with more than one female. The male entices the female for courtship by marking an area with urine. The female then responds by lying on her back to initiate copulation. The male and female may briefly share a den after copulation.
Mating System: polygynous
Little information for the breeding season of seven-banded armadillos is available, though it is likely similar to that of close relatives nine-banded armadillos. Nine-banded armadillos begin breeding in July and in rare occurrences extend the breeding season until December. Female seven-banded armadillos reach sexual maturity around 274 days of age. The gestation period for seven-banded armadillos is reported to be 132 days and varies little to the gestation period of 135 days for nine-banded armadillos. While gestation periods for seven-banded and nine-banded armadillos may last a little over 130 days, the pregnancy may last for an additional 120 days due to females' ability to delay implantation. Delayed implantation occurs in all members of g. Dasypus and results from the blastocyst remaining unattached in the uterus while allowing oxygen and nutrition to be released from uterine secretions. Delayed implantation usually occurs for three months after fertilization and may result from environmental stress. Davis and Schmimidly (1997) state that delayed implantation may help the young of g. Dasypus avoid stressful conditions and increase their chances of survival. When implantation occurs in seven-banded armadillos, the blastocyst divides to form 6 to 8 distinct embryonic growth centers, which attach to the uterus by a shared placenta. This process is called polyembryony and results in a litter of 6 to 8 identical offspring. Seven-banded armadillos frequently have litter sizes of 6-8 young, even though all members of g. Dasypus have four teats. Litter sizes are smaller for nine-banded armadillos as they consistently have a litter of four identical quadruplets to complement the number of teats. After implantation occurs for nine-banded armadillos, a litter is born fully formed with eyes opening in approximately 4 months. The young can begin to walk within hours of birth and forage with their mother within a few weeks. They are reported to wean within 2 months but may remain with their mother for a few more months. The young are then capable of breeding in the early summer of the following year.
Breeding interval: Breeding patterns of seven-banded armadillos are likely similar to that of nine banded armadillos, which breed yearly.
Breeding season: Breeding patterns of seven-banded armadillos are likely similar to that of nine banded armadillos, which breed during early summer.
Range number of offspring: 4 to 12.
Average number of offspring: 4 to 6.
Average gestation period: 132 days.
Average age at sexual or reproductive maturity (female): 274 days.
Key Reproductive Features: seasonal breeding ; gonochoric/gonochoristic/dioecious (sexes separate); sexual ; delayed implantation
Little information is available regarding parental investment of seven-banded armadillos.
Parental Investment: pre-hatching/birth (Provisioning: Female, Protecting: Female); pre-weaning/fledging (Provisioning: Female)
The seven-banded armadillo (Dasypus septemcinctus), also known as the Brazilian lesser long-nosed armadillo,[1] is a species of armadillo from South America found in Paraguay, Argentina, Bolivia and Brazil. It is a solitary nocturnal, terrestrial animal, living mostly in dry habitats, outside of rainforest regions.
Long-nosed armadillos have a broad, depressed body, an obtusely pointed rostrum, long, pointed ears and short legs. The carapace consists of two immobile plates, separated by six or seven movable bands, which are connected to each other by a fold of hairless skin. The carapace is mostly blackish, hairless and with the scales of the anterior edge of the movable bands not notably different in colour from the rest of the dorsum. Lateral scutes have dark blackish-pink centres only slightly discernible from the rest of the carapace, but never as obviously pale as in the nine-banded armadillo. Scutes on the movable bands are triangular in shape, but those on the main plates are rounded. The number of scutes present on the fourth movable band varies from 44 to 52, with a mean of 48.4.[2]
Females give birth to seven to nine genetically identical offspring.[3]
The seven-banded armadillo (Dasypus septemcinctus), also known as the Brazilian lesser long-nosed armadillo, is a species of armadillo from South America found in Paraguay, Argentina, Bolivia and Brazil. It is a solitary nocturnal, terrestrial animal, living mostly in dry habitats, outside of rainforest regions.
