. Annals of the New York Academy of Sciences. Science; Science -- New York (State). MATTHEW, CLIMATE AND EVOLUTION 241 ^VETIODACTYLA The great and diverse order of artiodactyla can fairly be regarded as of Holarctic origin as a whole. Its distribution can most readily be con- sidered group by group. Pigs and Peccaries.—These two groups are characteristic of the Old and Xew World respectively. The pigs are now chiefly Ethiopian and Oriental, the peccaries Neotropical in distribution. The peccaries first reached South America in the Pleistocene and ranged throughout the ances Tertiaru of peccari
. Annals of the New York Academy of Sciences. Science; Science -- New York (State). MATTHEW, CLIMATE AND EVOLUTION 241 ^VETIODACTYLA The great and diverse order of artiodactyla can fairly be regarded as of Holarctic origin as a whole. Its distribution can most readily be con- sidered group by group. Pigs and Peccaries.—These two groups are characteristic of the Old and Xew World respectively. The pigs are now chiefly Ethiopian and Oriental, the peccaries Neotropical in distribution. The peccaries first reached South America in the Pleistocene and ranged throughout the ances Tertiaru of peccariesi. No peccaries Ltnti'/ 'Plei'stocei-ie. ?l77tro£^ucec( ?y Fig. 21.—Distribution of pigs and peccaries In Old World, broken shading Siis only ; full shading, other genera. In New World, full shading Dicotyies. The dispersal center of Dicotylidse was Nearctic, of SuidiP Palae- arctic. The living South American genus is more primitive than the Pleistocene genera of North America, Platiifjoniis and Mylohyus (the Pleistocene North American species referred to Ditotyles are all lliilohyiis). United States from the Oligocene to as late as the Pleistocene. Pigs Avere common in the Oligocene and later Tertiary in Europe and were present in India in the Miocene, probably earlier. The Tertiary ancestry of the pigs in Europe can be traced back to a common ancestral group in the Eocene^ and the same is true of the peccaries in the western United Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York Academy of Sciences; Casey, Thos. L. (Thomas Lincoln), 1857-1925; Van Ingen, Gilbert, 1869-; Poor, Charles Lane, 1866-; Hovey, Edmund Otis, 1862-1924; Tower, Ralph W. (Ralph Winfred), 1870-1926. New York, New York Academy of Sciences
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