hyracotheriumn.

/ˌhʌɪərəkə(ʊ)ˈθɪərɪəm/

Forms: Also Hyracotherium.

Etymology: modern Latin, < hyraci- comb. form + Greek θηρίον wild beast.

An extinct mammal of the genus so called; a primitive type of horse.

ΘΚΠ

the world > animals > mammals > group Ungulata (hoofed) > family Equidae (general equines) > [noun] > extinct or prehistoric equines

opeagha1776

hyracotherium1840

hipparion1856

Protohippus1870

Miohippus1874

Pliohippus1874

Mesohippus1875

Orohippus1877

Eohippus1879

1840 R. Owen in Proc. Geol. Soc. 3 163 The resemblance of the molar division..in the new genus, for which the name of Hyracotherium is proposed, and the Chæropotamus, is sufficiently close.

1840 R. Owen in Proc. Geol. Soc. 3 163 The incisor teeth with the ossa intermaxillaria are wanting in the specimen of the Hyracotherium.

1851 G. F. Richardson Introd. Geol. (1855) 324 Hyracotherium, so named in consequence of its structural affinities in the size of the orbits, &c., with the Hyrax, was found in the London clay and the lacustrine eocene sand at Kyson.

1904 Daily Chron. 4 Jan. 9/1 Illustrations were given of a four and a five-toed horse, the extinct hyracotherium, no bigger than a Newfoundland dog.

1931 Discovery 12 32/1 The evolution of the horse from the little hyracotherium of the Eocene period—a creature not much larger than a cat—is admirably shown.

1955 Sci. News Let. 12 Feb. 104/1 The ancient horse, Hyracotherium, was not very much of a horse by modern standards. It was about the size of a shepherd dog and, unlike modern horses, it had four functional toes.

Derivatives

hyracotherian adj.

/ˌhaɪərəkə(ʊ)ˈθɪərɪən/ (also hyracotheriine

/ˌhaɪərəkə(ʊ)ˈθɪərɪaɪn/) belonging to the genus Hyracotherium.

ΘΚΠ

the world > animals > mammals > group Ungulata (hoofed) > order Perissodactyla (odd-toed ungulates) > [adjective] > relating to extinct or fossil types

palaeotheriodont1874

hyracotherian1887

rhinocerotid1916

1887 E. D. Cope in Amer. Naturalist Nov. 994 It has been from the Hyracotheriine sub-family that the horse line was derived.

This entry has not yet been fully updated (first published 1976; most recently modified version published online December 2020).

单词	hyracotherium
释义	hyracotheriumn. /ˌhʌɪərəkə(ʊ)ˈθɪərɪəm/ Forms: Also Hyracotherium. Etymology: modern Latin, < hyraci- comb. form + Greek θηρίον wild beast. An extinct mammal of the genus so called; a primitive type of horse. ΘΚΠ the world > animals > mammals > group Ungulata (hoofed) > family Equidae (general equines) > [noun] > extinct or prehistoric equines opeagha1776 hyracotherium1840 hipparion1856 Protohippus1870 Miohippus1874 Pliohippus1874 Mesohippus1875 Orohippus1877 Eohippus1879 1840 R. Owen in Proc. Geol. Soc. 3 163 The resemblance of the molar division..in the new genus, for which the name of Hyracotherium is proposed, and the Chæropotamus, is sufficiently close. 1840 R. Owen in Proc. Geol. Soc. 3 163 The incisor teeth with the ossa intermaxillaria are wanting in the specimen of the Hyracotherium. 1851 G. F. Richardson Introd. Geol. (1855) 324 Hyracotherium, so named in consequence of its structural affinities in the size of the orbits, &c., with the Hyrax, was found in the London clay and the lacustrine eocene sand at Kyson. 1904 Daily Chron. 4 Jan. 9/1 Illustrations were given of a four and a five-toed horse, the extinct hyracotherium, no bigger than a Newfoundland dog. 1931 Discovery 12 32/1 The evolution of the horse from the little hyracotherium of the Eocene period—a creature not much larger than a cat—is admirably shown. 1955 Sci. News Let. 12 Feb. 104/1 The ancient horse, Hyracotherium, was not very much of a horse by modern standards. It was about the size of a shepherd dog and, unlike modern horses, it had four functional toes. Derivatives hyracotherian adj. /ˌhaɪərəkə(ʊ)ˈθɪərɪən/ (also hyracotheriine /ˌhaɪərəkə(ʊ)ˈθɪərɪaɪn/) belonging to the genus Hyracotherium. ΘΚΠ the world > animals > mammals > group Ungulata (hoofed) > order Perissodactyla (odd-toed ungulates) > [adjective] > relating to extinct or fossil types palaeotheriodont1874 hyracotherian1887 rhinocerotid1916 1887 E. D. Cope in Amer. Naturalist Nov. 994 It has been from the Hyracotheriine sub-family that the horse line was derived. This entry has not yet been fully updated (first published 1976; most recently modified version published online December 2020). < n.1840
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