Arfak Mountain Ringtail Possums (Pseudochirulus schlegeli) of the Vogelkop Peninsula, New Guinea

Scientists strongly associate Arfak ringtail possums with:

• The Arfak Mountains, which accounts for the above-mentioned common name;  
• The Vogelkop Peninsula, which explains the alternate common name Vogelkop ringtail possum.

The colonial Dutch influence on western New Guinea continues in the common name Schlegels koeskoes (Schlegel’s ringtail possum). The designation kuskus ekor kait Arfak functions as one of the nocturnal marsupial’s local names. The list of names also includes the binomial (“two-name”) taxonomic identification Pseudochirulus schlegeli. The current classification is the culmination of 130 years of examination, interpretation, and revision. The genus name Pseudochirulus memorializes the Arfak ringtail’s human-like “false hands” and feet whose respective thumbs and big toes are graspingly opposable to the other digits.

The species commemorates Hermann Schlegel (June 10, 1804 - January 17, 1884), as:

• Altenburg-born amphibian and reptile expert, 1824-;
• National Museum of Natural History (Rijksmuseum van Natuurlijke Historie) director, 1858-;
• Notes from the Leyden Museum journal founder, 1862-.

Its first official taxonomic description dates back to 1884, from Wymbritseradiel-born Fredericus Anna Jentink (August 20, 1844 – November 4, 1913) as:

• Dutch bat, marsupial, and rodent expert, 1874-;
• Hermann’s successor journal editor and museum director, 1884-.

The Jentink description and all subsequent research draw upon a paucity of:

• Fewer than 5 known localities;
• Less than 10 museum specimens;
• Questionable information sources in agro-industrialists as stakeholders in reconfiguring ringtail habitats and villagers as stakeholders relieving ringtails of flesh and fur.  

In the absence of paper trails and protracted interactions, scientists indeed are vulnerable to confusing, inaccurate or non-existent data. For example, science historians and trivia buffs can point to initially misleading implications of investigations conducted in 1930 by London-born Captain John Guy Dollman (September 4, 1886 – March 21, 1942), as:

• British Museum (Natural History) mammalogist;
• Travel writer with London-born banker, baron, politician, and zoologist Lionel Walter Rothschild (February 8, 1868 – August 27, 1937).

The Dollman descriptions originally encourage separate classification as Pseudocheiros forbesi lewisi in the trinomial (“three-name”) taxonomic system. But in reality, the Dollman specimens function as color variants whose bio-geographical niches and morphological (“structural”) characteristics may be eligible for subspecies membership but resist species status.

Arfak ringtails are not the Arfak Mountains’ only ringtail possums. They claim niches at altitudes 2,460.63 - 6,233.59 feet (750 – 1,900 meters) above sea level. D’Albertis’ (Pseudochirops albertisii) and reclusive (Pseudochirops coronatus) ringtails cluster in habitats respectively at 3,280.84 – 6,233.59 feet (1,000 – 1,900 feet) and 3,280.84 – 6,561.68 feet (1,000 – 2,000 meters) above sea level. But Arfak ringtails distinguish themselves with:

• Big, dark, rounded eyes, dark whiskers, light snout, and small, tufted ears beautifying an orange-brown face;
• Black stripe demarcating the body’s upper middle, from the snout backwards;
• Dark- and orange-brown, grey and white grizzling upper-sides;
• Dark-brown, white and yellow mottling under-sides;
• Graspingly prehensile tail tapering from a furry base to a hairless, ring-curled tip and slip-resistant under-side.

Fine-tuned senses, pro-active behaviors, and super-specialized diets act to supplement the head start that camouflage-friendly body coloring gives Arfak ringtails on the road to population sustainability and species well-being. For example, Arfak ringtails count upon dark-adapted vision and super-sharp senses of hearing, smell, taste and touch. They counter the threats of predatory raptors and reptiles by:

• Awakening regularly to check day-time sights, smells and sounds;
• Changing shape while sleeping by tucking extremities chest-wards and using the tail as a blanket and disguise;
• Dwelling within moss-covered trees;
• Favoring arboreal nocturnalism and conflict-avoidance regarding access to resources and control over territories.

They give priority to coprophagous (“feces-eating”), folivorous (“leaf-eating”) regimes occasionally varied with samplings of:

• Bark;
• Flowers;
• Fruits;
• Sap.

Plant-based diets benefit from upper and lower jaws respectively grinding food with:

• 6 incisors, 2 canines, 6 premolars, and 8 molars;
• 4 incisors, 6 premolars, and 8 molars.

Diet contributes to physical and sexual maturity’s:

• Ear lengths: 0.62 – 0.76 inches (15.7 – 19.2 millimeters);
• Head-and-body lengths: 8.27 – 9.06 inches (210 – 230 millimeters);
• Rear-limb lengths: 1.15 – 1.29 inches (29.3 – 33 millimeters);
• Tail lengths: 8.27 – 9.84 inches (210 – 250 millimeters);
• Weights: 8.61 – 10.76 ounces.

Vegetarianism discourages predatory and rival encounters in:

• Limestone, sandstone, volcanic surface geology;
• Moist, montane, mossy, primary forests of New Guinea cypress (Papuacedrus papuana var. arfakensis) and white oak (Castanopsis acuminatissima), Southern/Antarctic beech (Nothofagus stylosa, womersleyi), and podocarps (Dacrydium novo-guineense; Dacrycarpus cinctus, compactus, expansus, imbricatus; Podocarpus spathoides).

Life cycles demand of Arfak ringtails:

• Jellybean-sized newborns crawling from birth canals to maternal pouches;
• Moving-classroom instruction from mother’s backs and nests;
• Survival in the Arfak Mountain, Tamrau Selatan, and Tamrau Utara Strict Nature Reserves.

Arfak ringtail natural histories evidence obligate environmentalism as:

• Pest-controllers;
• Resource-recyclers;
• Sanitation-engineers;
• Seed-spreaders;
• Vegetation-monitors;
• Water-conservers.

Survival hinges on masterfully but quietly, unobtrusively traversing sylvan habitats shared with likewise endemic (exclusive to the Arfak Mountains):

• Arfak astrapias (Astrapia nigra) and honeyeaters (Melipotes gymnops);
• Arfak green birdwings (Ornithoptera priamus aureus);
• Arfak Mountain burr orchids (Cadetia arfakensis).

But sustainability is answerable to:

• Forest-logging saw-millers;
• Land-reconfiguring agro-industrialists;
• Meat-and-pelt-seeking villagers;
• Philanthropic-minded eco-tourists;
• Protected areas;
• Research-funded scientists.

So like Arfak ringtail habitat preferences, it remains “up in the air.”

My special thanks to talented artists and photographers/concerned organizations who make their fine images available on the internet.

Distribution data from IUCN Red List: Chermundy/IUCN Red List of Threatened Species, species assessors and the authors of the spatial data, CC BY SA 3.0, via Wikimedia Commons @ https://en.wikipedia.org/wiki/File:Vogelkop_Ringtail_Possum_area.png

lithograph by Dutch lithographer and paleontological and scientific illustrator A.J. (Abraham Jacobus) Wendel (October 31, 1826-September 23, 1915)
Dr. F.A. Jentink, Notes from the Leyden Museum, Vol. VI (1884), frontispiece: Not in copyright, via Biodiversity Heritage Library @ https://www.biodiversitylibrary.org/page/9635522

Wilhelm Peters and Giacomo Doria, Enumerazione dei mammiferi (1881), Tav. XI: Public Domain, via Biodiversity Heritage Library @ https://www.biodiversitylibrary.org/page/14843598

Wilhelm Peters and Giacomo Doria, Enumerazione dei mammiferi (1881), Tav. XII: Public Domain, via Biodiversity Heritage Library @ https://www.biodiversitylibrary.org/page/14843600

Bird's Head (Indonesian: Kepala Burung, Dutch: Vogelkop) Peninsula, northwestern New Guinea: NASA World Wind, Public Domain, via Wikimedia Commons @ https://en.wikipedia.org/wiki/File:Birds_Head_Peninsula_NASA.jpg

P.L. Sclater, "Characters of new Species of Birds discovered in New Guinea by Signor d'Albertis (Plates LII.-LVII.)," 690-698.
Proceedings of Scientific Meetings of Zoological Society of London for the Year 1873 (Nov. 4), Plate LVI, between pages 690-691: Public Domain, via Biodiversity Heritage Library @ http://biodiversitylibrary.org/page/28504976

The Birds of New Guinea and the Adjacent Papuan islands (1875-1888), vol. I: Biodiversity Heritage Library (BioDivLibrary), Public Domain, via Flickr @ https://www.flickr.com/photos/biodivlibrary/48766094732/; Public Domain, via Biodiversity Heritage Library @ https://www.biodiversitylibrary.org/page/53841881; Public Domain, via Wikimedia Commons @ https://commons.wikimedia.org/wiki/File:Vogelkop_Bowerbird.jpg?uselang=fr

Friedrich Ratzel's (Aug. 30, 1844-Aug. 9, 1904) pile house came from "Maison aérienne à Mémiaoua," by Paul-Eugène Mesplès (July 7, 1849-Sep. 2, 1924), for Achille Raffray's (Oct. 17, 1844-Sep. 25, 1923) New Guinea articles (Tour de Monde, 1879).

"House in the Arfak village of Memiwa, New Guinea. (After Raffray.)"; F. Ratzel, The History of Mankind, vol. I (1896), page 263: No known copyright restrictions, via Internet Archive @ https://archive.org/details/cu31924092538184/page/263/mode/1up

"Arfak Mountains." Papua Expeditions: Birding Hotspots. Retrieved on April 4, 2014.

• Available at: http://www.bird-watching-papua-adventure-travel.com/birdinghotspots/arfakmountains.html

Bassarova, M.; Archer, M.; and Hand, S.J. 20 December 2001. “New Oligo-Miocene Pseudocheirids (Marsupialia) of the Genus Paljara from Riversleigh, Northwestern Queensland.”Memoirs of the Association of Australasian Palaeontologists 25:61-75.

Bisby F.A.; Roskov Y.R.; Orrell T.M.; Nicolson D.; Paglinawan L.E.; Bailly N.; Kirk P.M.; Bourgoin T.; Baillargeon G.; Ouvrard D. (red.). 2011. Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist. Species 2000: Reading, UK. Retrieved on April 4, 2014.

• Available at: http://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=709428

Boelens, Bo; Watkins, Michael; and Grayson, Michael. 2009. The Eponym Dictionary of Mammals. JHU Press.

Boudet, Ch. 10 January 2009. "Species Sheet: Arfak Ringtail." Mammals' Planet: Vs n°4, 04/2010. Retrieved on April 4, 2014.

• Available at: http://www.planet-mammiferes.org/drupal/en/node/38?indice=Pseudochirulus+schlegeli

Conn, Barry J.; and Damas, Kipiro Q. 2005. Guide to Trees of Papua New Guinea: Tree Descriptions. National Herbarium of New South Wales and Papua New Guinea National Herbarium. Retrieved on April 4, 2014.

• Available at: http://www.pngplants.org/PNGtrees/

Duff, Andrew; and Lawson, Ann. 2004. Mammals of the World: A Checklist. Yale University Press. 

Earle, Christopher J. (Editor). The Gymnosperm Database. Retrieved on April 4, 2014. 

• Available at: http://www.conifers.org/index.php

Flannery, Timothy F. 1994. Possums of the World: A Monograph of the Phalangeroidea. Chastwood, Australia: GEO Productions in association with the Australian Museum.

The Food and Agriculture Organization of the United Nations and the United Nations Environment Programme. 1984. “Part II Country Briefs: Papua New Guinea.” Tropical Forest Resources Assessment Project (in the framework of the Global Environment Monitoring System – GEMS) – Forest Resources of Tropical Asia. UN 32/6.1301-78-04 Technical Report 3. Rome, Italy: Publications Division, Food and Agriculture Organization of the United Nations, first printing 1981, second printing 1984. Retrieved on April 4, 2014. 

• Available at: http://www.fao.org/docrep/007/ad908e/ad908e00.htm
• Available at: http://www.fao.org/docrep/007/ad908e/AD908E22.htm

Food and Agriculture Organization Forest Harvesting, Trade and Marketing Branch. 1998. “Appendix 1. List of Tree Species.” Forest Harvesting Case-Study 15: Forest Harvesting Operations in Papua New Guinea, The PNG Logging Code of Practice. Rome, Italy: Publishing and Multimedia Service, Information Division, Food and Agriculture Organization of the United Nations. Retrieved on April 4, 2014. 

• Available at: http://www.fao.org/docrep/004/Y2711E/y2711e00.htm#TopOfPage
• Available at: http://www.fao.org/docrep/004/Y2711E/y2711e12.htm

Gansloßer, Udo. 2004. "Arfak Ringtail: Pseudocheirus schlegeli." P. 122 in Grzimek's Animal Life Encyclopedia, Second Edition. Volume 13: Mammals II, edited by Michael Hutchins, Devra G. Kleiman, Valerius Geist, and Melissa C. McDade. Farmington Hills, MI: Gale Group, Inc., division of Thomson Learning Inc.

Gibbs, L.S. July 1917. Dutch N.W. New Guinea: A Contribution to the Phytogeography and Flora of the Arfak Mountains (Read before the Newcastle Meeting of the British Association for the Advancement of Science, September 1916). London: Taylor and Francis. Retrieved on April 4, 2014.

• Available via Internet Archive at: https://archive.org/stream/mobot31753000302528#page/iv/mode/2up

• Available via Botanicus.org at: http://www.botanicus.org/title/b11815000

Gould, John. 1863. Mammals of Australia. Volume I. London: John Gould.

Helgen, K.; Dickman, C.; and Salas, L. 2008. "Pseudochirulus schlegeli." In: IUCN 2013. International Union for Conservation of Nature and Natural Resources Red List of Threatened Species. Version 2013.2.. Retrieved on April 4, 2014.

• Available at: http://www.iucnredlist.org/details/40641/0

Hoffman, Carl. Savage Harvest: A Tale of Cannibals, Colonialism, and Michael Rockefeller's Tragic Quest for Primitive Art. New York: HarperCollins Publishers, 2014.

Hume, Ian D. 1999. Marsupial Nutrition. Melbourne, Australia: Cambridge University Press.

Jentink, Dr. F.A. (Fredericus Anna). 1884. Notes from the Leyden Museum. Leyden: E.J. Brill.

• Available via Biodiversity Heritage Library at: http://biodiversitylibrary.org/page/9635519

Kennedy, Michael (Editor). 1992. Australasian Marsupials and Monotremes: An Action Plan for Their Conservation. International Union for Conservation of Nature and Natural Resources.

Kerle, Jean Anne. 2001. Possums: The Brushtails, Ringtails and Greater Glider. Sydney: University of New South Wales Australian Natural History Series. Retrieved on April 4, 2014. 

• Available at: http://books.google.com/books?id=YDM0hjAwchUC&lpg=PT65&dq=Petropseudes%20dahli&pg=PT66#v=onepage&q=Petropseudes%20dahli&f=false

Menkhorst, Peter; and Knight, Frank. 2001. A Field Guide to the Mammals of Australia. South Melbourne: Oxford University Press. 

Menzies, James. 5 June 2011. A Handbook of New Guinea’s Marsupials and Monotremes. University of Papua New Guinea Press.

Meredith, Robert W.; Mendoza, Miguel A.; Roberts, Karen K.; Westerman, Michael; and Springer, Mark S. 2 March 2010. “A Phylogeny and Timescale for the Evolution of Pseudocheiridae (Marsupialia: Diprotodontia) in Australia and New Guinea.” Journal of Mammalian Evolution17(2):75-99. Retrieved on April 4, 2014.

• Available at: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2987229/

Nowak, Ronald M. 1999. Walker's Mammals of the World, Sixth Edition. Volume I. Baltimore: Johns Hopkins University Press. 

Nowak, Ronald M. 2005. Walker's Marsupials of the World. Baltimore: Johns Hopkins University Press. 

"Papuan Montane Forest." Biome Explorer: Azonal Biomes>Montane Forests. Retrieved on April 4, 2014.

• Available at: http://www.biome-explorer.net/Montane%20Forest/Papuan%20Montane%20Forest.html

Peters, Wilhelm; and Giacomo Doria. Enumerazione dei mammiferi raccolti da O. Beccari, L.M. d'Albertis ed A.A. Bruijn nella Nuova Guinea. (Estratto dagli Ann. del Mus. Civ. di St. Nat. di Gen., Vol. XVI [29-31 marzo 1881]: 665 - 707.) Genova: Tipografia del Regio Istituto dei Sordo-Muti, 1881. Retrieved on April 4, 2014.

• Available via Biodiversity Heritage Library at: http://biodiversitylibrary.org/page/14843569

Peters, Wilhelm; and Giacomo Doria. "Enumerazione dei mammiferi raccolti da O. Beccari, L.M. d'Albertis ed A.A. Bruijn nella Nuova Guinea." Annali dei Museo Civico di Storia Naturale di Genova, Vol. XVI [29 marzo 1881]: 665 - 707. Retrieved on April 4, 2014.

• Available via Biodiversity Heritage Library at: http://biodiversitylibrary.org/page/29845102

Petocz, Ronald G. 1 October 1989. Conservation and Development in Irian Jaya: A Strategy for Rational Resource Utilization. Brill Academic Publishers.

"Pseudochirops schlegeli: Vogelkop Ringtail." Encyclopedia of Life. Retrieved on April 4, 2014.

• Available at: http://eol.org/pages/1038011/details

"Pseudochirulus schlegeli." The Marine Laboratory Universal Biology Indexer and Organizer: uBio Biodiversity Heritage Library Namebank ID 7140145. Retrieved on April 4, 2014.

• Available at: http://www.ubio.org/browser/details.php?namebankID=7140145

"Pseudochirulus schlegeli." Smithsonian National Museum of Natural History: Research & Collections>Vertebrate Zoology>Mammals>Databases>MSW>Taxonomic Browser, 2011. Retrieved on April 4, 2014.

• Available at: http://www.vertebrates.si.edu/msw/mswcfapp/msw/taxon_browser.cfm?msw_id=522

"Pseudochirulus schlegeli (Arfak Ringtail)." Zipcode Zoo: Species Identifier 1026173. Retrieved on April 4, 2014.

• Available at: http://zipcodezoo.com/Animals/P/Pseudochirulus_schlegeli/

Raffay, Aquiles. "Casa aérea en Memiaoua." <em>Viaje á Nueva Guinea</em>: opposite page 42. Traduccion y arreglo del Dr. Moreno [Vicente Moreno de la Tejera]. Juan Vidal, ed., Edicion de Gran Lujo. Madrid [Spain]: Biblioteca de Viajes, 1881.

• Available via British Library at: http://access.bl.uk/item/viewer/ark:/81055/vdc_000000015E16#?c=0&m=0&s=0&cv=62&xywh=-1227%2C-1%2C4855%2C3250

Raffray, Achille. "Voyage en Nouvelle-Guinée: Maison aérienne à Mémiaoua." <em>Le Tour du Monde</em>, vingtième année (1879), vol. XXXVII, livraison 955, pp. 265.

• Available via HathiTrust at: https://hdl.handle.net/2027/uc1.c2744097?urlappend=%3Bseq=277%3Bownerid=13510798902613797-311

Raffray, Achille. "Voyage en Nouvelle-Guinée." <em>Le Tour du Monde</em>, vingtième année (1879), vol. XXXVII, livraison 953, pp. 225-240.

• Available via HathiTrust at: https://hdl.handle.net/2027/uc1.c2744097?urlappend=%3Bseq=237%3Bownerid=13510798902613797-261

Raffray, Achille. "Voyage en Nouvelle-Guinée." <em>Le Tour du Monde</em>, vingtième année (1879), vol. XXXVII, livraison 954, pp. 241-256.

• Available via HathiTrust at: https://hdl.handle.net/2027/uc1.c2744097?urlappend=%3Bseq=253%3Bownerid=13510798902613797-277

Raffray, Achille. "Voyage en Nouvelle-Guinée." <em>Le Tour du Monde</em>, vingtième année (1879), vol. XXXVII, livraison 955, pp. 257-272.

• Available via HathiTrust at: https://hdl.handle.net/2027/uc1.c2744097?urlappend=%3Bseq=269%3Bownerid=13510798902613797-303

Raffray, Achille. "Voyage en Nouvelle-Guinée." <em>Le Tour du Monde</em>, vingtième année (1879), vol. XXXVII, livraison 956, pp. 273-288.

• Available via HathiTrust at: https://hdl.handle.net/2027/uc1.c2744097?urlappend=%3Bseq=285%3Bownerid=13510798902613797-319

Ratzel, Friedrich. "House in the Arfak village of Memiwa, New Guinea. "After Raffray.)." The History of Mankind, vol. I (1896), p. 263. Translated from German into English by A.J. Butler. London: Macmillan and Co., Ltd.; New York: The Macmillan Co., 1896.

• Available via Internet Archive at: https://archive.org/details/cu31924092538184/page/263/mode/1up

Ratzel, Friedrich. The History of Mankind, vol. I. Translated from German into English by A.J. Butler. London: Macmillan and Co., Ltd.; New York: The Macmillan Co., 1896.

• Available via Internet Archive at @ https://archive.org/details/cu31924092538184/

Ride, W.D.L. 1970. A Guide to the Native Mammals of Australia. Melbourne: Oxford University Press. 

Schaefer, Albrecht G. “New Guinea Forests: Still the Tropical Paradise.” World Wildlife Global>What We Do>Priority Places>New Guinea>The Area>Ecosystems>Forests. Retrieved on April 9, 2014.

• Available at: http://wwf.panda.org/what_we_do/where_we_work/new_guinea_forests/area_forests_new_guinea/new_guinea_forests_ecosystems/forests_new_guinea/

Sclater, P.L. 1873. "Character of New Species of Birds Discovered in New Guinea by Signor d'Albertis." Pages 690 -698. Proceedings of the Scientific Meetings of the Zoological Society of London for the Year 1873. London: Longmans, Green, Reader, and Dyer.

• Available via Biodiversity Heritage Library at: http://biodiversitylibrary.org/page/28504967

Sillitoe, Paul. 2013. Managing Animals in New Guinea: Preying the Game in The Highlands. Routledge: Studies in Environmental Anthropology.

Sillitoe, Professor Paul; and Pointet, Dr. Abram. 2009. Was Valley Anthropological Archives. Retrieved on April 4, 2014.

• Available at: http://www.wolaland.org/page/

Strahan, Ronald; and Conder, Pamela. 2007. Dictionary of Australian and New Guinean Mammals. CSIRO Publishing.

Surhone, Lambert M.; Timpledon, Miriam T.; and Marseken, Susan F. 29 June 2010. Vogelkop Ringtail Possum. Betascript Publishing: High Quality Content by WIKIPEDIA articles.  

Tyndale-Biscoe, Hugh. 2005. Life of Marsupials. Collingwood, Victoria, Australia: CSIRO Publishing.

Wilson, Don E.; and Reeder, DeeAnn M. (editors). 2005. Mammal Species
of the World: A Taxonomic and Geographic Reference (3rd ed), Johns Hopkins University Press.

World Wildlife Fund (edited by Conservation Biology, Biodiversity, Ecology Topic Editor Mark McGinley. 18 November 2008 updated 13 October 3011. "Vogelkop Montane Rain Forests." The Encyclopedia of Earth. Retrieved on April 4, 2014.

• Available at: http://www.eoearth.org/view/article/156863/

Wrobel, Murray (Editor). 2007. Elsevier's Dictionary of Mammals: Latin English German French Italian. Oxford, U.K.: Elsevier B.V.