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Post by another specialist on Jun 6, 2005 15:09:21 GMT
Aidemedia chascax
Olson & James 1991
Holocene of Oahu, Hawaiian Islands
Primary materials: Holotype: mandibula
Secondary materials: Paratypes: maxilla
Storrs L. Olson & Helen F. James,
Descriptions of thirty-two new species of birds from the Hawaiian Islands: Part II. Passeriformes
Ornithological Monographs 46 (1991)
The American Ornithologists' Union, Washington D.C.
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Post by Melanie on Jun 6, 2005 21:41:59 GMT
The Icterids are a large group of strong-billed birds limited in distribution to the New World. The group includes the orioles.
This is a newly described species which is part of the new Genus Aidemedia. The Aidemedia species are characterized as being Drepanidine birds with sturdy ,straight or decurved, very elongate bills, with extremely long retroarticular processes on the mandibles.
This Oahu specied was described from bones discovered at Barbers Point in July /August 1977 by Aki Sinoto and others.Additional Pleistocene fossils discovered at Ulupau Head on Oahu might also belong to this species.
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Post by another specialist on Jun 7, 2005 6:12:15 GMT
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Post by another specialist on Nov 8, 2005 7:55:50 GMT
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Post by another specialist on Nov 8, 2005 7:56:43 GMT
commonly called O'ahu Icterid-like Gaper
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Post by another specialist on Jul 22, 2006 10:21:22 GMT
Aidemedia chascax, new species
(Figs. 28H, I, J, 29B, 30B)
"Icterid-like gaper, Oahu" Olson and James, 1982b:41, 45; 1984:771.
Holotype: Mandible with slightly damaged symphysis, lacking the right articular
end and part of the right ramus (middle part), BBM-X 155523 (Figs. 29B, 30B).
Collected July or August 1977 by Aki Sinoto and others.
Type locality: Site 50-Oa-B6-100b, Barbers Point, Oahu, Hawaiian Islands.
Distribution: Oahu: Barbers Point. It is as yet uncertain whether fragmentary
Pleistocene fossils assigned to Aidemedia ("icterid-like gaper" James 1987:225)
from Ulupau Head on Oahu also belong to this species.
Etymology: Greek, chaskax, a gaper; from the adaptation of the bill for gaping.
The name is a masculine noun in apposition.
Measurements of holotype: See Table 11.
Paratypes: Maxilla lacking posterior portion, BBM-X 155844 (Fig. 28H, I, J);
two nearly intact mandibular symphyses, USNM 445814 and BBM-X 154918;
fragment of left side of mandible, USNM 255564; tip of mandibular symphysis,
USNM 255125.
Measurements ofparatypes: See Table 11.
Diagnosis: The very straight, sturdy bill resembles that of Aidemedia lutetiae,
but is longer and has the dorsal surface of the maxilla less flattened. Also, the
retroarticular process is deeper and is displaced ventrally, and the mandibular
ramus (middle part) is not angled downward as strongly. The mandible is broader
and less decurved than in A. zanclops.
Remarks: See the following species. |
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Post by another specialist on Jul 22, 2006 10:23:10 GMT
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Post by another specialist on Jul 22, 2006 10:30:42 GMT
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Post by another specialist on Jul 22, 2006 10:30:57 GMT
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