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1

Rapid repair of traumatic injury by an Ordovician trilobite

Journal:

Year:

1977

Language:

english

File:

PDF, 775 KB

english, 1977

2

Biogeographic Control of Trilobite Mass Extinction at an Upper Cambrian "Biomere" Boundary

Stephen R. Westrop and Rolf Ludvigsen

Journal:

Year:

1987

Language:

english

File:

PDF, 1.77 MB

english, 1987

3

Ordovician Pterygometopidae (Trilobita) of North America

Ludvigsen, Rolf, Chatterton, Brian D. E.

Journal:

Canadian Journal of Earth Sciences

Year:

1982

Language:

english

File:

PDF, 4.24 MB

english, 1982

4

Late Early Devonian Dacryoconarid Tentaculites, Northern Yukon Territory

Ludvigsen, Rolf

Journal:

Canadian Journal of Earth Sciences

Year:

1972

Language:

english

File:

PDF, 2.60 MB

english, 1972

5

New cheirurinid trilobites from the lower Whittaker Formation (Ordovician), southern Mackenzie Mountains

Ludvigsen, Rolf

Journal:

Canadian Journal of Earth Sciences

Year:

1976

Language:

english

File:

PDF, 1.54 MB

english, 1976

6

Lower Ordovician trilobites of the Oxford Formation, eastern Ontario

Ludvigsen, Rolf

Journal:

Canadian Journal of Earth Sciences

Year:

1979

Language:

english

File:

PDF, 1.02 MB

english, 1979

7

Classification and conodont-based age of the Ordovician trilobite Ellsaspis (middle Arenigian, Ville Guay, Quebec)

Landing, Ed, Ludvigsen, Rolf

Journal:

Canadian Journal of Earth Sciences

Year:

1984

Language:

english

File:

PDF, 1.33 MB

english, 1984

8

Classification of the Late Cambrian trilobite Idiomesus Raymond

Ludvigsen, Rolf, Westrop, Stephen R.

Journal:

Canadian Journal of Earth Sciences

Year:

1986

Language:

english

File:

PDF, 1000 KB

english, 1986

9

The peculiar Ordovician trilobite Hypodicranotus from the Whittaker Formation, District of Mackenzie

Ludvigsen, Rolf, Chatterton, Brian D. E.

Journal:

Canadian Journal of Earth Sciences

Year:

1991

Language:

english

File:

PDF, 1.09 MB

english, 1991

10

Reef trilobites from the Formosa Limestone (Lower Devonian) of southern Ontario

Ludvigsen, Rolf

Journal:

Canadian Journal of Earth Sciences

Year:

1987

Language:

english

File:

PDF, 2.05 MB

english, 1987

11

Ordovician Formations and Faunas, Southern Mackenzie Mountains

Ludvigsen, Rolf

Journal:

Canadian Journal of Earth Sciences

Year:

1975

Language:

english

File:

PDF, 4.32 MB

english, 1975

12

Development of the caudal exoskeleton of the pliomerid trilobite Hintzeia plicamarginis new species

Andrew G. Simpson, Nigel C. Hughes, David C. Kopaska-Merkel, Rolf Ludvigsen

Journal:

Evolution & Development

Year:

2005

Language:

english

File:

PDF, 1.09 MB

english, 2005

13

The preferential dopamine D3 receptor agonist cis-8-OH-PBZI induces limbic Fos expression in rat brain

Mark A Scheideler, Joel Martin, Rolf Hohlweg, Jesper S Rasmussen, Lars Nærum, Thomas S Ludvigsen, Philip J Larsen, Niels Korsgaard, A.Micheal Crider, Debasis Ghosh, Sharon F Cruse, Anders Fink-Jensen

Journal:

European Journal of Pharmacology

Year:

1997

Language:

english

File:

PDF, 728 KB

english, 1997

14

Stratigraphy: Foundations and Concepts

Ludvigsen, Rolf

Journal:

Eos Transactions American Geophysical Union

Year:

1985

Language:

english

File:

PDF, 312 KB

english, 1985

15

Marjuman (Cambrian) Agnostoid Trilobites of the Cow Head Group, Western Newfoundland

Stephen R. Westrop, Rolf Ludvigsen and Cecil H. Kindle

Journal:

Journal of Paleontology

Year:

1996

Language:

english

File:

PDF, 2.62 MB

english, 1996

16

Supplement to Vol. 72, no. 2 of the Journal of Paleontology || Upper Steptoean (Upper Cambrian) Trilobites from the McKay Group of Southeastern British Columbia, Canada

Brian D. E. Chatterton and Rolf Ludvigsen

Journal:

Memoir (The Paleontological Society)

Year:

1998

Language:

english

File:

PDF, 9.52 MB

english, 1998

17

Trilobite biofacies of the Cambrian-Ordovician boundary interval in northern North America

Ludvigsen, Rolf, Westrop, Stephen R.

Journal:

Alcheringa An Australasian Journal of Palaeontology

Year:

1983

Language:

english

File:

PDF, 1.46 MB

english, 1983

18

THE LATE CAMBRIAN (MARJUMAN) TRILOBITE GENUS HYSTEROPLEURA RAYMOND FROM THE COW HEAD GROUP, WESTERN NEWFOUNDLAND

WESTROP, STEPHEN R., LUDVIGSEN, ROLF

Journal:

Journal of Paleontology

Year:

2000

Language:

english

File:

PDF, 963 KB

english, 2000

19

The Ordovician Trilobite Ceraurinus Barton in North America

Journal:

Journal of Paleontology

Year:

1977

Language:

english

File:

PDF, 1.02 MB

english, 1977

20

Revision of Acheilus and Theodenisia (Late Cambrian, Trilobita)

Journal:

Journal of Paleontology

Year:

1986

Language:

english

File:

PDF, 601 KB

english, 1986

21

The Late Cambrian (Marjuman) Trilobite Genus Hysteropleura Raymond from the Cow Head Group, Western Newfoundland

Stephen R. Westrop and Rolf Ludvigsen

Journal:

Journal of Paleontology

Year:

2000

Language:

english

File:

PDF, 1.37 MB

english, 2000

22

Carinagypa, a New Genus of Pentameracean Brachiopod from the Devonian of Western North America

J. G. Johnson and Rolf Ludvigsen

Journal:

Journal of Paleontology

Year:

1972

Language:

english

File:

PDF, 328 KB

english, 1972

23

Type Species of the Basal Ibexian Trilobite Corbinia Walcott, 1924

Stephen R. Westrop and Rolf Ludvigsen

Journal:

Journal of Paleontology

Year:

1986

Language:

english

File:

PDF, 715 KB

english, 1986

24

Three new Upper Cambrian stages for North America

Ludvigsen, Rolf, Westrop, Stephen R.

Journal:

Year:

1985

Language:

english

File:

PDF, 290 KB

english, 1985

25

Comments and Replies on “Three new Upper Cambrian stages for North America”

Ludvigsen, Rolf, Westrop, Stephen R.

Journal:

Year:

1985

Language:

english

File:

PDF, 368 KB

english, 1985

26

Marjuman (Cambrian) agnostoid trilobites of the Cow Head Group, western Newfoundland

Westrop, Stephen R., Ludvigsen, Rolf, Kindle, Cecil H.

Journal:

Journal of Paleontology

Year:

1996

Language:

english

File:

PDF, 15.35 MB

english, 1996

27

Type species of the basal Ibexian trilobite Corbinia Walcott, 1924

Westrop, Stephen R., Ludvigsen, Rolf

Journal:

Journal of Paleontology

Year:

1986

Language:

english

File:

PDF, 5.54 MB

english, 1986

28

Revision of Acheilus and Theodenisia (Late Cambrian, Trilobita)

Ludvigsen, Rolf

Journal:

Journal of Paleontology

Year:

1986

Language:

english

File:

PDF, 4.90 MB

english, 1986

29

Reflections and looking ahead for CSCL: digital infrastructures, digital tools, and collaborative learning

Ludvigsen, Sten, Steier, Rolf

Journal:

International Journal of Computer-Supported Collaborative Learning

Year:

2019

File:

PDF, 233 KB

2019

30

The Late Cambrian (Marjuman) trilobite genus Hysteropleura Raymond from the Cow Head Group, western Newfoundland

Westrop, Stephen R., Ludvigsen, Rolf

Journal:

Journal of Paleontology

Year:

2000

File:

PDF, 9.20 MB

2000

31

Upper Steptoean (Upper Cambrian) Trilobites from the Mckay Group of Southeastern British Columbia, Canada

Chatterton, Brian D. E., Ludvigsen, Rolf

Journal:

Journal of Paleontology

Year:

1998

File:

PDF, 77.26 MB

1998