PHORORHACOS , the best-known genus of the
See also:extinct Patagonian Stereornithes (see
See also:BIRD: Fossil) . Among the bones found in the strata of the
See also:Santa Cruz formation (now considered as mainly of
See also:Miocene date) was the piece of a mandible which F . Ameghino described in 1887 as that of an edentate mammal, under the name of Phorysrhacos longissimus (Bolet .
See also:Mus. de la
See also:Plata, i . 24) . In 1891 (Rev . Argent . Hist . Nat. i . 225) (From
See also:model in Brit . Mus . Nat .
See also:Skull of Phororhacos, longissimus . he amended the name and recognized the
See also:bone as that of a bird, Phororhacos, which with Brontornis and others constituted the
See also:family Phororhacidae . About six
See also:species of the type genus are now known, the most
See also:complete being Ph. infiatus, with skull, mandible, pelvis, limbs and some of the vertebrae . These birds were at first considered as either belonging to the
See also:Ratitae, or at least related to them, until C . W . Andrews, after much of the interesting material had been acquired by the
See also:British Museum, showed the gruiform
See also:affinities of Phororhacos (
See also:Ibis, 1896, pp . 1-12), a conclusion which he was able to further corroborate after the clearing of the adherent stony
See also:matrix from the skulls (Tr . Z . S . 19ox, xv. pp . 55-86, pls . 14-17) .
The skull of Ph. longissimus is about 2 ft.long and to in. high; that of Ph. inflatus is 13 in. long, and this creature is supposed to have stood only 3 ft. high at the
See also:middle of the back . The under
See also:jaw is slightly curved upwards and it contains a large foramen as for instance in Psophia and in Mycteria . The strongly hooked upper
See also:beak is very high, and very much compressed laterally . The palate is imperfectly desmognathous, as in Dicholophus, with an inconspicuous vomer . The quadrate has a
See also:double knob for its articulation with the skull, and basipterygoid processes are absent . What little is known of the
See also:girdle (breastbone still unknown) points to a flightless bird, and so do the
See also:short wing bones, although these are stout . The pelvis has an ischiadic foramen . The
See also:hind limbs are distinctly slender, the
See also:tibia of Ph. inflatus being between 15 and 16 in. in length . For further detail see F . Ameghino, " Sur
See also:les oiseaux fossiles de la Patagonie," Bolet. inst. geogr. argentino, xv., chs . II and 12 (1895); F . P .
Moreno and A . Mercerat, Catdlogo de los pdjaros f6siles de la Republica
See also:Argentina, An . Mus . La Plata (1891; with 21 plates) . (H . F .
There are no comments yet for this article.
Do not copy, download, transfer, or otherwise replicate the site content in whole or in part.
Links to articles and home page are encouraged.