Thylamys sponsorius (Thomas 1921)

Like other small mammals, Thylamys sponsorius is likely well adapted to avoiding predators by being nocturnal and inconspicuous. No records of known predators are available.

Anti-predator Adaptations: cryptic

Like other members of its genus, Thylamys sponsorius is notable for its incrassate (fattened) tail. The size of the tail varies by season in accordance with food availability. Although this species is a marsupial, females do not have a pouch. This species is tricolored, with darker dorsal fur, paler lateral fur, and a grayish ventral region. This species is very similar in morphology to its sister species Thylamys venustus, though it tends to be slightly larger. Like Thylamys venustus, this species has a relatively long tail that is considerably longer than its body. Giarla et al. (2010) report head + body lengths that range from 86 to 119 mm (average 99 mm) and tail lengths that range from 125 to 154 mm long (average 138 mm).

Range length: 211 to 273 mm.

Average length: 237 mm.

Other Physical Features: endothermic ; bilateral symmetry

No records of this species' lifespan are available.

Thylamys sponsorius primarily inhabits mid-level montane forests and seasonally dry forests between 515 and 3750 meters above sea level in the eastern Andes. This species overlaps in distribution with Thylamys venustus and Thylamys pallidior.

Range elevation: 515 to 3750 m.

Habitat Regions: tropical

Terrestrial Biomes: forest ; mountains

Thylamys sponsorius is distributed in the eastern foothills of the Andes, extending from southern Bolivia into northern Argentina.

Biogeographic Regions: neotropical (Native )

Little is known about the food habits of this species. Like other Thylamys species, Thylamys sponsorius likely consumes insects and perhaps occasionally eats small vertebrates, leaves, fruit, seeds, and carrion (Palma 1997).

Primary Diet: carnivore (Insectivore )

Thylamys sponsorius likely acts as an important predator to many arthropod species and perhaps some small vertebrates. It is likely prey to both bird and medium-sized mammals, such as owls and foxes. It is also likely host to many ecto- and endoparasites. More specific information about the ecosystem role of Thylamys sponsorius is not presently available.

There are no known positive impacts of Thylamys sponsorius on humans.

There are no known negative impacts of Thylamys sponsorius.

This species is listed by the IUCN as "Least Concern".

IUCN Red List of Threatened Species: least concern

Because this species is small and nocturnal, communication between individuals is likely primarily olfactory in nature. Palma (1997) reports that the olfactory and visual regions of another Thylamys species' brain are especially well developed.

Communication Channels: visual ; tactile ; acoustic ; chemical

Perception Channels: visual ; tactile ; acoustic ; vibrations ; chemical

Little is known about the mating system in Thylamys sponsorius.

Little is known about the general reproductive behavior of Thylamys sponsorius.

Key Reproductive Features: gonochoric/gonochoristic/dioecious (sexes separate); sexual ; viviparous

Little is known about parental investment in Thylamys sponsorius. Like all marsupials, females nurse their highly altricial young. However, because members of the genus Thylamys lack a pouch (marsupium), the young must cling to their mother's venter.

Parental Investment: altricial ; female parental care ; pre-fertilization (Protecting: Female); pre-hatching/birth (Provisioning: Female, Protecting: Female); pre-weaning/fledging (Provisioning: Female, Protecting: Female)

La marmosa de l'Argentina (Thylamys sponsorius) és una espècie d'opòssum de la família dels didèlfids. Viu als vessants orientals dels Andes al nord de l'Argentina i el sud de Bolívia.

L-Opossum ġurdien ta' denbu oħxon tal-Arġentina jew opossum ta' denbu oħxon tal-Arġentina, magħruf xjentifikament bħala Thylamys sponsorius, huwa mammiferu marsupjal tat-tribù Thylamyini, fil-familja Didelphidae (didelfidu), fl-ordni Didelphimorphia (didelfimorfju) u huwa wieħed mill-opossumi ġrieden ta' denbhom oħxon nattiv tal-kontinent tal-Amerika t'Isfel.

Dan l-opossum ġurdien ta' denbu oħxon huwa marsupjal kemm arborju (jgħix fis-siġar) kif ukoll terrestri (jgħix mal-art), b'abitudni notturna (attiv bil-lejl). Id-dieta tiegħu hija primarjament insettivora, għalkemm frott, bajd tal-għasafar u annimali vertebrati żgħar bħal gremxul u ġrieden huma inklużi fid-dieta tiegħu.

Thylamys sponsorius huwa speċi b'distribuzjoni fil-kontinent tal-Amerika t'Isfel, mifruxa mal-Arġentina u endemika ta' dan il-pajjiż.

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Thylamys sponsorius Thylamys generoko animalia da. Didelphimorphia ordenaren barruko ugaztuna da. Didelphinae azpifamilia eta Didelphidae familian sailkatuta dago.

Thylamys sponsorius is een zoogdier uit de familie van de Didelphidae. De wetenschappelijke naam van de soort werd voor het eerst geldig gepubliceerd door Thomas in 1921.

Thylamys sponsorius är en pungdjursart som först beskrevs av Thomas 1921. Thylamys sponsorius ingår i släktet Thylamys och familjen pungråttor. IUCN kategoriserar arten globalt som livskraftig. Inga underarter finns listade.

Pungdjuret förekommer i norra Argentina och angränsande delar av Bolivia. Arten vistas där i mera torra områden som är täckta av gräs och buskar. Thylamys sponsorius lever i Andernas östra delar mellan 515 och 3750 meter över havet.

Arten blir 86 till 119 mm lång (huvud och bål) och har en 125 till 154 mm lång svans. Pälsen är nästan svart på ryggen, något ljusare vid sidorna och grå på undersidan. Liksom andra medlemmar av samma släkte har arten en svans som kan lagra fett. Den kan vara smal eller tjock beroende på årstid. Thylamys sponsorius tillhör pungdjuren men honor saknar pung (marsupium).

Födan utgörs av insekter och små ryggradsdjur. När honan inte är brunstig antas individerna leva ensam. Denna pungråtta är främst nattaktiv. För övrigt antas levnadssättet vara lika som hos andra arter av släktet Thylamys.

Thylamys sponsorius là một loài động vật có vú trong họ Didelphidae, bộ Didelphimorphia. Loài này được Thomas mô tả năm 1902.