allochronicadj.

Brit.

/ˌaləˈkrɒnɪk/, U.S.

/ˌæləˈkrɑnɪk/

Origin: Formed within English, by compounding. Etymons: allo- comb. form, synchronic adj.

Etymology: < allo- comb. form + -chronic (in synchronic adj.).

Biology.

1. Of species, populations, features, etc.: existing or arising at different periods of geological time.

ΘΚΠ

the world > life > biology > balance of nature > population > [adjective] > existing at different seasons

allochronic1942

1942 E. Mayr Systematics & Origin of Species vii. 153 The delimitation of species which do not belong to the same time level (allochronic species) is difficult.

1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) XII. 572/2 Species which occur together in time, more particularly at the same geological level, are designated as synchronic; those which are separated in time are allochronic.

1993 W. H. Kimbal & L. B. Martin Species, Species Concepts, & Primate Evol. xxi. 548 Under the PSC [= phylogenetic species concept], Homo rudolfensis and Homo habilis, differentiated allochronic taxa,..are accorded the same meaning as Pan troglodytes and Homo sapiens, differentiated synchronic–sympatric taxa.

2. Of speciation: occurring as a result of the development of different breeding seasons in populations which are not geographically separated; (of organisms) breeding or flourishing at different seasons.

ΘΚΠ

the world > life > biology > biological processes > evolution > [adjective] > processes or types of evolution

high?1548

recapitulative1836

retrogressive1853

transmutational1861

ontogenetic1869

convergent1871

phylogenetic1876

correlative1877

ontogenic1878

phylogenetical1879

phytogenetic1882

monotypic1888

phytogenetical1888

polytypic1888

ontogenal1890

phylogenal1890

recapitulatory1890

tachygenetic1893

ontogenetical1894

anagenetic1896

orthogenic1896

orthogenetic1899

macroevolutionary1937

microevolutionary1937

proterogenetic1938

speciational1944

parapatric1953

cladogenetic1957

allochronic1960

stasigenetic1965

stasipatric1967

speciating1970

punctuational1976

tachygenic-

1960 Behavior 17 130 Allochronic speciation in field crickets.

1977 Science 5 Aug. 592/3 Proposed cases of sympatric speciation through seasonal isolation (that is, allochronic speciation) are not as well supported.

1983 R. Thornhill & J. Alcock Evol. Insect Mating Syst. xiii. 409 There are few well-documented cases of nearly identical songs..among allopatric or allochronic (seasonally segregated) species of acoustical insects.

2006 J. T. Costa Other Insect Societies x. 264 Host-associated populations are partially allochronic, with the greatest divergence in timing of eclosion, adult maturation, and time of day of mating.

This entry has been updated (OED Third Edition, September 2012; most recently modified version published online December 2021).

单词	allochronic
释义	allochronicadj. Brit. /ˌaləˈkrɒnɪk/, U.S. /ˌæləˈkrɑnɪk/ Origin: Formed within English, by compounding. Etymons: allo- comb. form, synchronic adj. Etymology: < allo- comb. form + -chronic (in synchronic adj.). Biology. 1. Of species, populations, features, etc.: existing or arising at different periods of geological time. ΘΚΠ the world > life > biology > balance of nature > population > [adjective] > existing at different seasons allochronic1942 1942 E. Mayr Systematics & Origin of Species vii. 153 The delimitation of species which do not belong to the same time level (allochronic species) is difficult. 1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) XII. 572/2 Species which occur together in time, more particularly at the same geological level, are designated as synchronic; those which are separated in time are allochronic. 1993 W. H. Kimbal & L. B. Martin Species, Species Concepts, & Primate Evol. xxi. 548 Under the PSC [= phylogenetic species concept], Homo rudolfensis and Homo habilis, differentiated allochronic taxa,..are accorded the same meaning as Pan troglodytes and Homo sapiens, differentiated synchronic–sympatric taxa. 2. Of speciation: occurring as a result of the development of different breeding seasons in populations which are not geographically separated; (of organisms) breeding or flourishing at different seasons. ΘΚΠ the world > life > biology > biological processes > evolution > [adjective] > processes or types of evolution high?1548 recapitulative1836 retrogressive1853 transmutational1861 ontogenetic1869 convergent1871 phylogenetic1876 correlative1877 ontogenic1878 phylogenetical1879 phytogenetic1882 monotypic1888 phytogenetical1888 polytypic1888 ontogenal1890 phylogenal1890 recapitulatory1890 tachygenetic1893 ontogenetical1894 anagenetic1896 orthogenic1896 orthogenetic1899 macroevolutionary1937 microevolutionary1937 proterogenetic1938 speciational1944 parapatric1953 cladogenetic1957 allochronic1960 stasigenetic1965 stasipatric1967 speciating1970 punctuational1976 tachygenic- 1960 Behavior 17 130 Allochronic speciation in field crickets. 1977 Science 5 Aug. 592/3 Proposed cases of sympatric speciation through seasonal isolation (that is, allochronic speciation) are not as well supported. 1983 R. Thornhill & J. Alcock Evol. Insect Mating Syst. xiii. 409 There are few well-documented cases of nearly identical songs..among allopatric or allochronic (seasonally segregated) species of acoustical insects. 2006 J. T. Costa Other Insect Societies x. 264 Host-associated populations are partially allochronic, with the greatest divergence in timing of eclosion, adult maturation, and time of day of mating. This entry has been updated (OED Third Edition, September 2012; most recently modified version published online December 2021). < adj.1942
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