Clinal variation, episodic evolution, and possible parapatric speciation: the trilobite Flexicalymene senaria along an Ordovician depth gradient
作者： JOHN L. CISNE , GEORGE O. CHANDLEE , BRUCE D. RABE , JILL A. COHEN
DOI: 10.1111/J.1502-3931.1982.TB01697.X
关键词: Gradient analysis 、 Flexicalymene 、 Trilobite 、 Speciation 、 Transect 、 Paleontology 、 Parapatric speciation 、 Biology 、 Ordovician 、 Cline (biology)
摘要: Pygidial segmentation in the trilobite Flexicalymene senaria changes with time (as measured relation to bentonite beds) and depth along downslopc transects bentomtc beds as by gradient analysis of fossil assemblages) a ‘fossil’ Middle Ordovician Trenton Group central New York State. The pattern strictly temporal change resembles ‘punctuation’ between ‘equilibria’. This evolutionary episode, 106 year interval continuous change, may represent parapatric speciation. clinal is strongest during this episode weak or not apparent outside it. Strictly takes place way cline's shape. □Evolution, geographic variation dines, analysis. Ordovician, morphometry, speciation, Trilobita.
sci-hub.se 参考文章(20)
M. O. Hill, Correspondence Analysis: A Neglected Multivariate Method Applied Statistics. ,vol. 23, pp. 340- 354 ,(1974) , 10.2307/2347127
Donald W. Fisher, Correlation of the Hadrynian, Cambrian and Ordovician rocks in New York State University of the State of New York, State Education Dept.. ,(1977)
Stephen Jay Gould, Niles Eldredge, Punctuated equilibria; the tempo and mode of evolution reconsidered Paleobiology. ,vol. 3, pp. 115- 151 ,(1977) , 10.1017/S0094837300005224
John L. Cisne, Life History of an Ordovican Trilobite Triarthrus Eatoni Ecology. ,vol. 54, pp. 135- 142 ,(1973) , 10.2307/1934382
JOHN L. CISNE, GEORGE O. CHANDLEE, Taconic Foreland Basin graptolites: age zonation, depth zonation, and use in ecostratigraphic correlation Lethaia. ,vol. 15, pp. 343- 363 ,(1982) , 10.1111/J.1502-3931.1982.TB01699.X
JOHN L. CISNE, DANIEL E. KARIG, BRUCE D. RABE, BERNWARD J. HAY, Topography and tectonics of the Taconic outer trench slope as revealed through gradient analysis of fossil assemblages Lethaia. ,vol. 15, pp. 229- 246 ,(1982) , 10.1111/J.1502-3931.1982.TB00647.X
M. O. Hill, Reciprocal Averaging: An Eigenvector Method of Ordination The Journal of Ecology. ,vol. 61, pp. 237- 249 ,(1973) , 10.2307/2258931
H. Wiegand, Pielou, E. C. An introduction to mathematical ecology. Wiley Interscience. John Wiley & Sons, New York 1969. VIII + 286 S., 32 Abb., Preis 140 s Biometrische Zeitschrift. ,vol. 13, pp. 219- 220 ,(1971) , 10.1002/BIMJ.19710130308
BRUCE D. RABE, JOHN L. CISNE, Chronostratigraphic accuracy of Ordovician ecostratigraphic correlation Lethaia. ,vol. 13, pp. 109- 118 ,(1980) , 10.1111/J.1502-3931.1980.TB01039.X
Leigh Van Valen, Variation Genetics of Extinct Animals The American Naturalist. ,vol. 103, pp. 193- 224 ,(1969) , 10.1086/282596