PHORORHACOS

This article appears in Volume V21, Page 474 of the Encyclopedia Britannica.

Encyclopedia Britannica - Main :: PER-PIG

PHORORHACOS , the best-known genus of the

extinct

EXTINCT

Patagonian Stereornithes (see BIRD: Fossil). Among the bones found in the strata of the Santa Cruz formation (now considered as mainly of mid-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. Mus. de la Plata, i. 24). In 1891 (Rev. Argent. Hist. Nat. i. 225)
(From

life

LIFE

-size model in Brit. Mus. Nat. Hist.)
Skull of Phororhacos, longissimus.
he amended the name and recognized the bone as that of a bird, Phororhacos, which with Brontornis and others constituted the family Phororhacidae. About six species of the type genus are now known, the most 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 Ratitae, or at least related to them, until C. W. Andrews, after much of the interesting material had been acquired by the British Museum, showed the gruiform affinities of Phororhacos (

Ibis

IBIS

, 1896, pp. 1-12), a conclusion which he was able to further corroborate after the clearing of the adherent stony 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

LONG, GEORGE (1800-1879)
LONG, JOHN DAVIS (1838– )

and to in. high; that of Ph. inflatus is 13 in.

long

LONG, GEORGE (1800-1879)
LONG, JOHN DAVIS (1838– )

, and this creature is supposed to have stood only 3 ft. high at the middle of the back. The under jaw is slightly curved upwards and it contains a large foramen as for instance in Psophia and in Mycteria. The strongly hooked upper

beak

BEAK (early forms beke and becke, from Fr. bec, late Lat. beccus, supposed to be a Gaulish word; the Celtic bec and beq, however, are taken from the
English
- ENGLISH
)

is very high, and very much compressed laterally. The

palate

PALATE (Lat. palatum, possibly from the root of pascere, to feed)

is imperfectly desmognathous, as in Dicholophus, with an inconspicuous vomer. The quadrate has a

double

knob for its articulation with the skull, and basipterygoid processes are absent. What little is known of the

shoulder

SHOULDER (in O.E. sculder, cognate with Ger. Schulter, Dutch schouder, Swed. skuldra, &c; the root is unknown)

girdle

GIRDLE (O. Eng. gyrdel, from gyrdan, to gird; cf. Ger. Gurtel, Dutch gordel, from giirten and gorden; "gird" and its doublet " girth " together with the other Teutonic cognates have been referred by some to the root ghar—to seize, enclose, seen in Gr. )(s

(breastbone still unknown) points to a flightless bird, and so do the short wing bones, although these are stout. The pelvis has an ischiadic foramen. The hind limbs are distinctly slender, the tibia of Ph. inflatus being between 15 and 16 in. in length.
For further detail see F. Ameghino, " Sur 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 Argentina, An. Mus. La Plata (1891; with 21 plates). (H. F. G.)

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