Long-beaked echidna

Long-beaked echidnas[1]
Western long-beaked echidna
(Zaglossus bruijni)
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Monotremata
Family: Tachyglossidae
Genus: Zaglossus
Gill, 1877
Type species
Tachyglossus bruijni
Peters and Doria, 1876
Species

Zaglossus attenboroughi
Zaglossus bartoni
Zaglossus bruijni
†Zaglossus hacketti
†Zaglossus robustus

The long-beaked echidnas (genus Zaglossus) make up one of the two extant genera of echidnas, spiny monotremes that live in New Guinea. There are three living species and two extinct species in this genus. The extinct species were present in Australia. Echidnas are one of the two types of mammals that lay eggs, the other being the platypus. The echidnas are a part of a very small group of surviving descendants of the earliest types of mammals; they retain many reptilian features such as egg-laying but display mammalian features such as fur and lactation. As such they were one of the first surviving mammals to clearly show a snap-shot of macroevolution in action.[2]

All three long-beaked echidna species are listed as Critically Endangered by the IUCN.[3][4][5]

Species

Zaglossus attenboroughi

Zaglossus bartoni

Zaglossus bruijni

†Zaglossus hacketti

Main article: Zaglossus hacketti

†Zaglossus robustus

Main article: Zaglossus robustus

General Information

The long-beaked echidna is larger than the short-beaked and has fewer, shorter spines scattered among its coarse hairs. The snout is two-thirds of the head length and curves slightly downward. There are five digits on both hind and forefeet, but on the former, only the three middle toes are equipped with claws. Males have a spur on each of the hind legs. This echidna is primarily a nocturnal animal that forages for its insect food on the forest floor. The animals are not usually foraging in the daylight. The long-beaked echidna lives in dens and they are commonly found to be in underground burrows.[6] The breeding female has a temporary abdominal brood patch, in which her egg is incubated and in which the newborn young remains in safety, feeding and developing. Since they reproduce by laying eggs and are incubated outside of the mother’s body it is accompanied by the prototherian lactation process show that they are early mammals. The long-beaked echidna has a short weaning period. During this time milk is their only source of nutrition and protection for the hatchlings; they are altricial and immunologically naive.[7] Little is known about the life of this rarely seen animal, but it is believed to have habits similar to those of the short-beaked echidna. The population of echidnas in New Guinea is declining because of forest clearing and overhunting, and the animal is much in need of protection.

See also

References

  1. ↑ Groves, C. P. (2005). "Order Monotremata". In Wilson, D. E.; Reeder, D. M. Mammal Species of the World (3rd ed.). Johns Hopkins University Press. pp. 1–2. ISBN 978-0-8018-8221-0. OCLC 62265494.
  2. ↑ Werneburg, I.; Sánchez-Villagra, M. R. (January 2011). "The early development of the echidna, Tachyglossus aculeatus (Mammalia: Monotremata), and patterns of mammalian development". Acta Zoologica 92: 75–88. doi:10.1111/j.1463-6395.2009.00447.x.
  3. ↑ 3.0 3.1 Leary, T., Seri, L., Flannery, T., Wright, D., Hamilton, S., Helgen, K., Singadan, R., Menzies, J., Allison, A., James, R., Aplin, K., Salas, L. & Dickman, C. (2008). Zaglossus attenboroughi. In: IUCN 2008. IUCN Red List of Threatened Species. Retrieved 28 December 2008. Database entry includes justification for why this species is listed as critically endangered.
  4. ↑ 4.0 4.1 Leary, T., Seri, L., Flannery, T., Wright, D., Hamilton, S., Helgen, K., Singadan, R., Menzies, J., Allison, A., James, R., Aplin, K., Salas, L. & Dickman, C. (2008). Zaglossus bartoni. In: IUCN 2008. IUCN Red List of Threatened Species. Retrieved 28 December 2008. Database entry includes justification for why this species is listed as critically endangered.
  5. ↑ 5.0 5.1 Leary, T., Seri, L., Flannery, T., Wright, D., Hamilton, S., Helgen, K., Singadan, R., Menzies, J., Allison, A., James, R., Aplin, K., Salas, L. & Dickman, C. (2008). Zaglossus bruijnii. In: IUCN 2008. IUCN Red List of Threatened Species. Retrieved 28 December 2008. Database entry includes justification for why this species is listed as critically endangered
  6. ↑ Opiang, M. D. (April 2009). "Home ranges, movement, and den use in long-beaked echidnas, Zaglossus bartoni, from Papua New Guinea". Journal of Mammalogy 90 (2): 340–346. doi:10.1644/08-MAMM-A-108.1.
  7. ↑ Bisana, S.; Kumar, S.; Rismiller, P.; Nicol, S. C.; Lefèvre, C.; Nicholas, K. R.; Sharp, J. A. (2013-01-09). "Identification and Functional Characterization of a Novel Monotreme- Specific Antibacterial Protein Expressed during Lactation". PLoS ONE 8 (1): e53686. doi:10.1371/journal.pone.0053686. PMC 3541144. PMID 23326486.

External links

Wikispecies has information related to: Zaglossus
Wikimedia Commons has media related to Zaglossus.