phylembryon.

Brit.

/fʌɪˈlɛmbrɪəʊ/, U.S.

/faɪˈlɛmbriˌoʊ/

Origin: Formed within English, by compounding. Etymons: phylo- comb. form, embryo n.

Etymology: < phylo- comb. form + embryo n., after earlier terms coined by A. Hyatt (phylogerontic adj., phylonepionic adj. at phylo- comb. form , etc., and metembryo n., neoembryo n., protembryo n., typembryo n., etc.). With phylembryonic adj. at Derivatives compare metembryonic adj., neoembryonic adj. at neoembryo n. Derivatives, protembryonic adj. at protembryo n. Derivatives.

Zoology. Now disused.

In the evolutionary theory of A. Hyatt and others: the final stage in development of an animal embryo, in which the characteristics specific to the major group to which it belongs are fully established, regarded as representing an ancestral form; (also) the ancestral form itself, whether theoretical or identified with an extant or fossil species. Cf. neoembryo n., typembryo n.

ΘΚΠ

the world > life > biology > biological processes > evolution > [noun] > evolutionary ancestor

progenerator1692

ancestorc1760

monad1826

progenitor1855

protomorph1876

promorph1889

phylembryo1890

protolife1964

1890 R. T. Jackson in Mem. Boston Soc. Nat. Hist. 4 289 I have shown that the veliger stage of molluscs is referable to the class or phylum to which the embryo really belongs. As it is a period most distinct and important, I suggest for it the name phylembryo.

1899 Appletons' Pop. Sci. Monthly Aug. 464 The ancestral form of this group, the phylembryo, has been found in Paterina, whose adult represents the youngest stage, the beak of the shell, of other Brachiopods.

1920 Philos. Trans. (Royal Soc.) B. 209 380 Bothriocidaris is not merely the oldest Echinoid known but morphologically it approximates remarkably to the theoretical phylembryo of the class.

Derivatives

phylembryˈonic adj.

ΘΚΠ

the world > life > biology > biological processes > evolution > [adjective] > evolutionary ancestor

primitive1846

ancestral1851

protomorphic1855

phylembryonic1890

1890 R. T. Jackson in Mem. Boston Soc. Nat. Hist. 4 289 The phylembryonic mollusc is an early period in development.

1902 Amer. Naturalist 36 920 The umbilicus..is well marked in Fulgur at the end of the protoconch (phylembryonic) stage, before the velum is fully developed.

This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022).

单词	phylembryo
释义	phylembryon. Brit. /fʌɪˈlɛmbrɪəʊ/, U.S. /faɪˈlɛmbriˌoʊ/ Origin: Formed within English, by compounding. Etymons: phylo- comb. form, embryo n. Etymology: < phylo- comb. form + embryo n., after earlier terms coined by A. Hyatt (phylogerontic adj., phylonepionic adj. at phylo- comb. form , etc., and metembryo n., neoembryo n., protembryo n., typembryo n., etc.). With phylembryonic adj. at Derivatives compare metembryonic adj., neoembryonic adj. at neoembryo n. Derivatives, protembryonic adj. at protembryo n. Derivatives. Zoology. Now disused. In the evolutionary theory of A. Hyatt and others: the final stage in development of an animal embryo, in which the characteristics specific to the major group to which it belongs are fully established, regarded as representing an ancestral form; (also) the ancestral form itself, whether theoretical or identified with an extant or fossil species. Cf. neoembryo n., typembryo n. ΘΚΠ the world > life > biology > biological processes > evolution > [noun] > evolutionary ancestor progenerator1692 ancestorc1760 monad1826 progenitor1855 protomorph1876 promorph1889 phylembryo1890 protolife1964 1890 R. T. Jackson in Mem. Boston Soc. Nat. Hist. 4 289 I have shown that the veliger stage of molluscs is referable to the class or phylum to which the embryo really belongs. As it is a period most distinct and important, I suggest for it the name phylembryo. 1899 Appletons' Pop. Sci. Monthly Aug. 464 The ancestral form of this group, the phylembryo, has been found in Paterina, whose adult represents the youngest stage, the beak of the shell, of other Brachiopods. 1920 Philos. Trans. (Royal Soc.) B. 209 380 Bothriocidaris is not merely the oldest Echinoid known but morphologically it approximates remarkably to the theoretical phylembryo of the class. Derivatives phylembryˈonic adj. ΘΚΠ the world > life > biology > biological processes > evolution > [adjective] > evolutionary ancestor primitive1846 ancestral1851 protomorphic1855 phylembryonic1890 1890 R. T. Jackson in Mem. Boston Soc. Nat. Hist. 4 289 The phylembryonic mollusc is an early period in development. 1902 Amer. Naturalist 36 920 The umbilicus..is well marked in Fulgur at the end of the protoconch (phylembryonic) stage, before the velum is fully developed. This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022). < n.1890
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