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Post by sebbe67 on May 16, 2005 17:18:49 GMT
St Helena Rail Porzana astrictocarpus is only known from fossils from St Helena (to UK). It was driven to extinction by introduced predators soon after the island was discovered in 1502.
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Post by another specialist on Jun 6, 2005 5:54:31 GMT
Porzana astrictocarpus
Olson 1973
Late Holocene (extinction after 1502 AD) of St. Helena, s Atlantic Ocean
Primary materials: Holotype: nearly complete skeleton
Storrs L. Olson,
Evolution of the rails of the south Atlantic Islands (Aves: Rallidae)
Smithsonian Contributions to Zoology 152 (1973): 1-53
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Post by another specialist on Jun 8, 2005 9:57:51 GMT
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Deleted
Deleted Member
Posts: 0
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Post by Deleted on Nov 1, 2005 18:29:34 GMT
Hi ! Saint Helena Crake:  Bye Alex |
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Post by another specialist on Nov 2, 2005 14:58:16 GMT
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Post by Melanie on Nov 22, 2006 3:35:55 GMT
Porzana astrictocarpus
Previous to my visit, there had been no indication
of a second species of rail in the fossil record
of St. Helena. However, I found bones of a species
much smaller than Atlantisia podarces to be relatively
common at Prosperous Bay, Sandy Bay Site
A, and Dry Gut. This bird was also quite flightless
and was a short-billed crake of the genus Porzana
that I have named P. astrictocarpus (Olson, 1973),
owing to the peculiar shape of the carpometacarpus.
Porzana astrictocarpus appears to be a derivative
of the widespread species Porzana pusilla, which
occurs in Africa, Europe, Asia (including Japan),
and the Australian region (including New Zealand).
I consider Porzana ("Porzanula") palmeri of
Laysan Island in the Pacific to be another flightless
derivative of P. pusilla. Thus it appears that a single
mainland species has given rise to two flightless
species on islands on opposite sides of the world.
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Post by Melanie on Nov 22, 2006 3:38:26 GMT
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Post by Melanie on Nov 22, 2006 5:24:13 GMT
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Post by Melanie on Nov 22, 2006 5:57:04 GMT
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Post by another specialist on Apr 5, 2008 20:40:42 GMT
Re: Evolution of Rails in the South Atlantic Islands |
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Post by another specialist on Apr 5, 2008 21:09:06 GMT
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Post by another specialist on Jun 20, 2008 14:57:10 GMT
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Post by surroundx on Mar 25, 2015 12:43:58 GMT
The species name is spelled incorrectly in the thread name: should read astrictocarpus.
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