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Post by another specialist on Dec 31, 2006 12:52:50 GMT
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Post by another specialist on Dec 31, 2006 13:27:50 GMT
Apart from the 1-3 extinctions in more recent times, 2 species have gone extinct as a consequnce of early human settlement: Hodgen's Waterhen (Gallinula hodgenorum) of New Zealand, and the undescribed Viti Levu Gallinule of Fiji which would either be separated in Pareudiastes if that genus is considered valid, or may be a completely new genus. Similarly, the undescribed Mangaia "Swamphen" which is currently tentatively assigned to Porphyrio may belong to Gallinula/Pareudiastes. en.wikipedia.org/wiki/Moorhen |
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Post by another specialist on Jul 31, 2007 8:53:32 GMT
Hodgen's Rail = Gallinula Hodgeni a flightless moorhen which had a short wide bill. been found on both North and South Islands in Maori kitchen middens. It was named after Messrs J. and R. Hodgen, owners of Pyramid valley swamp, where some of the bones were found.
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Post by another specialist on Nov 25, 2008 7:26:06 GMT
In his latest paper, " A Review of the Extinct Rails of the New Zealand Region (Aves: Rallidae) " - National Museum of New Zealand Records Vol. 1, No. 3, November 27 1975, my friend Storrs Olson places the rail I described originally as Rallus hodgeni and subsequently as Capellirallus hodgeni as a Tribonyx. It is now Gallinula (Tribonyx) hodgeni. This follows Storrs Olson's discovery of the bill of this bird, an element which was lacking in the material with wihch I was working, in the National Museum. He showed it to me, and I am in thorough agreement with him on this point. www.notornis.org.nz/free_issues/Notornis_23-1976/Notornis_23_1.pdft. The subfossil rail Rallus hodgeni, which in the past has been referred to its own genus (Pyramida) and also to Capellirallus, is shown to be a flightless derivative of the Australian galhnules of the sub- genus Tribonyx and becomes Gallínula (Tribonyx) hodgeni si-pddr.si.edu/dspace/bitstream/10088/1737/1/NZ_rails.pdf |
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Post by another specialist on Nov 25, 2008 7:31:35 GMT
2. Gallirallus hartreei is considered to be a synonym of Gallínula (Tribonyx) hodgeni si-pddr.si.edu/dspace/bitstream/10088/1737/1/NZ_rails.pdf However, I disagree strongly with Olson when he regards Gallirallus hartreei as a synonym of hodgeni. I have re-examined the material, and still maintain that hartreei is related to the Weka, and is not a Tribonyx. The fact that some of the bones of Tribonyx hodgeni and Gallirallus hartreei have similarities in size and shape does not mean that they are identical. There are subtle differences, apparent to the eye, but not always susceptible to measurement, that distinguish the two. After all close resemblance between certain limb bones is not uncommon in birds of different species: e.g. the tibio-tarsi of the upper range f Emeus crassus and lower range of Euryapteryx gravis strongly resemble each other, as do those of the upper range of gravis and the lower range of Pachyornis elephantopus. The femora of Tadorna variegata and Euryanas finschi also bear a very strong resemblance to one another, but not even Storrs would regard them as the one species. This seems an appropriate place to place on record another discovery of Gallirallus hartreei. On 11 November 1975 Christopher Wiffen and I found a right humerus, and a right ulna which I also tentatively assign to hartreei, among bones which had weathered from a Moahunter Maori midden in the dunes of Ocean Beach, Hawkes Bay. The measurements in centimetres are: ' Humerus: L. 4.210: P. 0.890: M. 0.3 D. 0.6 Ulna: L. 3.15: P. 0.4: M. 0.2 D. 0.4 The ulna is more curved than in hodgeni. This extends the time range of Gallirallus hartreei considerably, as the new bones are unlikely to be more than 5 or 6 hundred years old, if that. I must leave the rest of Storrs Olson's stimulating paper for later comment. RON SCARLETT Osteologist, Canterbury Museum 19 December 1975 Dr Olson has replied as follows: In response to Mr Scarlett's letter I would point y t that the lengths he gives for the two new elements attributed to Gallirallus hartreei " fall well within the range of variation of Gallinula (Tribonyx) hodgeni (see Olson, Nut. Mus. N.Z. Recs. 1 (3) : 66, table 1). Beyond this we are told that only certain unspecified " subtle differences " distinguish these two species. Yet Mr Scarlett places them in different genera ! To accept Gallirallus hartreei as a valid species would appear to require faith; in this instance I do not count myself among the faithful. STORRS L. OLSON Smithsonian Institution Washington, D.C., U.S.A. 12 March 1976 www.notornis.org.nz/free_issues/Notornis_23-1976/Notornis_23_1.pdf |
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Post by another specialist on Nov 25, 2008 8:16:28 GMT
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Post by another specialist on Nov 25, 2008 8:17:47 GMT
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Post by another specialist on Nov 25, 2008 8:18:38 GMT
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Post by Peter on Oct 16, 2013 7:53:59 GMT
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Post by Peter on Oct 16, 2013 8:19:32 GMT
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Post by Peter on Oct 16, 2013 8:24:54 GMT
Reference of its first description: Scarlett, R.C. (1955). A new rail from South Island swamps In New Zealand. Records Canterbury Mus. 6: 265-266.
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Post by surroundx on Dec 2, 2013 5:04:09 GMT
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Post by surroundx on Dec 2, 2013 6:05:39 GMT
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Post by Melanie on Oct 25, 2014 8:13:16 GMT
Now in the genus Tribonyx, similar to its relative, the Tasmanian Native Hen.
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Post by surroundx on Nov 14, 2016 10:00:25 GMT
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Post by surroundx on Nov 14, 2016 12:23:09 GMT
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Post by Sebbe on Oct 27, 2024 8:09:12 GMT
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