Talk:Diprotodon

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Pronunciation[edit]

How does one pronounce this? I always read it as dip-ro-TO-don, before I knew much about it, but now knowing the etymology of the word, I guess perhaps it is di-PRO-to-don? -postglock 05:49, 1 November 2006 (UTC)

The link to "diprotodon.com" seems to be a spam link.

It is indeed pronouced di-PRO-to-don. T.carnifex (talk) 04:50, 2 May 2008 (UTC)

Australis[edit]

Is it Diprotodon australis or Diprotodon optatum? Are these two different species? If they're the same, when did the naming change and why? T.carnifex (talk) 04:51, 2 May 2008 (UTC)

I think they're two different species (there is also D. minor)--Mr Fink (talk) 05:45, 2 May 2008 (UTC)

D. annextans[edit]

Would anyone know what the source is for this rather peculiar name? A search on Google Books turns up one reference in Prehistoric mammals of Australia and New Guinea ([1]) mentioning McCoy (1861). McCoy apparently did name at least one (putative?) species of Diprotodon, D. longiceps, but I didn't find anything more about D. annextans. The name does bear some resemblance with Trachodon annectens. Iblardi (talk) 00:08, 5 June 2008 (UTC)

Diprotodon annextans was erected on the basis of a broken mandible from a mature large-form individual collected from near Colac, Victoria. The original description was presented at a meeting to the Royal Society of Victoria (Anonymous, 1861).although the original paper was subsequently lost(McCoy, 1865). However, an abstract was later published regarding that specimen, but with a new name,D. longiceps (McCoy, 1865), and a holotype was subsequently described (McCoy, 1876). the dentary and associated dentition of D. annextans/longiceps is morphologically similar to and falls within the range of variation of specimens from all major Diprotodon assemblages. (see Price 2008)Vrkunkel(talk) —Preceding undated comment added 00:58, 18 October 2009 (UTC).

Mass[edit]

If it's only know from fossils, how can they come up with a mass of 2,786 kg? Most of the mass would be flesh, so how can the mass be known to such precision? I suppose it's a conversion thing, but 6,142 pounds is not a round number either. This source, BBC states "Weight: males 2000 to 2500kg; females 1000kg", which makes more sense, but it's smaller than 2786 kg, so I'm not sure which is correct. AtikuX (talk) 03:25, 27 June 2008 (UTC)

Body-size metrics to estimate fossil body volume are used. Basically these are logarithmic equations based on the craniodental data and the product of the lengths of the three major body axes (anteroposterior, transverse, and dorsoventral) of fossils if the morphology is similar to a living animal (in this case the Wombat), but while very accurate for placentals it was found it did not work for marsupials (This is due to Marsupials needing 20% less food than placentals of equal body mass) and is where the "2000 to 2500kg" came from. Since 2003, proximal limb-bone circumferences are also used for marsupials. If a 3.7 mtr Diprotodon was a placental it would weigh around 1,900 kg (the weight of a 3.7mtr Hippopotamus) but the marsupial specific measurement now gives a result of 2,786 kg with 95% accuracy (consistent with the difference between modern placentals and marsupials of similar size). The 2786 kg is the estimate for the Diprotodon displayed in the Australian Museum which is considered to be of average size. According to latest research the average male weight is now estimated at between 2272 kg and 3417 kg. Wayne (talk) 13:07, 6 July 2008 (UTC)
BTW..Results of calculations are not rounded to the nearest "neat" number which is why exact numbers are shown. Though it says 2786 it means the range for that particular specimen is around 2640 to 2940kg. Wayne (talk) 13:14, 6 July 2008 (UTC)