DOI: 10.1017/s0094837300013646. Tempo and mode of morphologic evolution near the origin of the radiolarian lineage <i>Pterocanium prismatium</i>

Tempo and mode of morphologic evolution near the origin of the radiolarian lineage Pterocanium prismatium

10.1017/s0094837300013646

Crossref journal-article

Cambridge University Press (CUP)

Paleobiology (56)

Abstract

Morphometric examination of cladogenesis and phyletic evolution in two late Neogene sister lineages of marine microfossils (Pterocanium prismatium and P. charybdeum, Radiolaria) from two equatorial Pacific sediment cores was undertaken to better understand the rate of cladogenesis and its relation to subsequent phyletic change. The origin of P. prismatium from P. charybdeum ∼4 ma ago has been estimated to take place over an interval of ∼500,000 yr. Results show that the speciation event consists of two distinct phases. The first phase, cladogenesis, occurred relatively rapidly (on the order of 50,000 yr). A second phase of relatively rapid divergent phyletic evolution away from the common ancestral state followed in both descendant branches and continued for at least 500,000 yr after completion of the cladogenetic event. Net evolutionary rates over the next 2 ma appear to be much lower. Individual characters change by as much as 2 population standard deviations during cladogenesis, and by a total of approximately 3 standard deviations over 2.5 ma of phyletic evolution. Up to 5 population standard deviations of change during ≦ 50,000 yr of cladogenesis, and 7 additional standard deviations of phyletic change over 500,000 yr are observed in multivariate (discriminant function) indices of morphologic difference. The measured pattern does not appear to be either strictly “punctuated” or strictly “gradual,” but instead shows features of both hypotheses.

Bibliography

Lazarus, D. (1986). Tempo and mode of morphologic evolution near the origin of the radiolarian lineage Pterocanium prismatium. Paleobiology, 12(2), 175â189.

Authors 1

David Lazarus (first)

References 23 Referenced 57

10.2113/gsjfr.12.1.1
{'key': 'S0094837300013646_ref12', 'first-page': '196', 'article-title': 'Character displacement and phyletic change in the evolution of the radiolarian subfamily Artiscinae', 'volume': '26', 'author': 'Kellogg', 'year': '1980', 'journal-title': 'Micro-paleontology.'} / Micro-paleontology. / Character displacement and phyletic change in the evolution of the radiolarian subfamily Artiscinae by Kellogg (1980)
10.1017/S0022336000043110
10.1146/annurev.es.14.110183.000535
{'key': 'S0094837300013646_ref4', 'first-page': '191', 'volume-title': 'Lecture Notes in Biomathematics', 'volume': '24', 'author': 'Bookstein', 'year': '1978'} / Lecture Notes in Biomathematics by Bookstein (1978)
10.1130/0016-7606(1985)96<1407:CG>2.0.CO;2
{'key': 'S0094837300013646_ref17', 'first-page': '183', 'article-title': 'Evolution of the radiolarian species-complex Pterocanium: a preliminary survey', 'volume': '59', 'author': 'Lazarus', 'year': '1985', 'journal-title': 'J. Paleontol.'} / J. Paleontol. / Evolution of the radiolarian species-complex Pterocanium: a preliminary survey by Lazarus (1985)
10.1017/S0094837300005224
10.1017/S0094837300007855
{'key': 'S0094837300013646_ref2', 'first-page': '905', 'volume-title': 'Initial Reports of the Deep Sea Drilling Project', 'author': 'Barron', 'year': '1985'} / Initial Reports of the Deep Sea Drilling Project by Barron (1985)
10.1017/S0094837300004000
10.1017/S0094837300002347
10.1017/S0094837300007806
{'key': 'S0094837300013646_ref23', 'first-page': '332', 'volume-title': 'Macroevolution: Pattern and Process', 'author': 'Stanley', 'year': '1979'} / Macroevolution: Pattern and Process by Stanley (1979)
10.1111/j.1558-5646.1975.tb00868.x
10.1017/S009483730000782X
{'key': 'S0094837300013646_ref7', 'first-page': '246', 'volume-title': 'Monogr. Pop. Biol.', 'volume': '10', 'author': 'Endler', 'year': '1977'} / Monogr. Pop. Biol. by Endler (1977)
{'key': 'S0094837300013646_ref5', 'first-page': '550', 'volume-title': 'Statistics and Data Analysis in Geology', 'author': 'Davis', 'year': '1973'} / Statistics and Data Analysis in Geology by Davis (1973)
10.1130/MEM126-p185
10.1017/S0094837300007843
{'key': 'S0094837300013646_ref21', 'first-page': '904', 'article-title': 'A method of randomly distributing grains for microscopic examination', 'volume': '43', 'author': 'Moore', 'year': '1973', 'journal-title': 'J. Sed. Petrol.'} / J. Sed. Petrol. / A method of randomly distributing grains for microscopic examination by Moore (1973)
{'key': 'S0094837300013646_ref6', 'first-page': '82', 'volume-title': 'Models in Paleobiology', 'author': 'Eldredge', 'year': '1972'} / Models in Paleobiology by Eldredge (1972)
10.1017/S0094837300002669

Dates

Type	When
Created	9 years, 1 month ago (July 27, 2016, 1:55 a.m.)
Deposited	6 years, 3 months ago (May 22, 2019, 3:39 p.m.)
Indexed	3 months, 1 week ago (May 21, 2025, 5:28 a.m.)
Issued	39 years, 8 months ago (Jan. 1, 1986)
Published	39 years, 8 months ago (Jan. 1, 1986)
Published Online	9 years, 4 months ago (April 8, 2016)
Published Print	39 years, 8 months ago (Jan. 1, 1986)

Funders 0

None

BibTeX

@article{Lazarus_1986, title={Tempo and mode of morphologic evolution near the origin of the radiolarian lineage Pterocanium prismatium}, volume={12}, ISSN={1938-5331}, url={http://dx.doi.org/10.1017/s0094837300013646}, DOI={10.1017/s0094837300013646}, number={2}, journal={Paleobiology}, publisher={Cambridge University Press (CUP)}, author={Lazarus, David}, year={1986}, pages={175–189} }

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