Cited by 178Evolution and Paleontology StudiesPaleontology and Evolutionary BiologyMarine animal studies overview

The DOI matches its Crossref record; 48 of the 50 references it cites were found in a registry or an index.

From land to water: The origin of whales, dolphins and porpoises

Open access
Thewissen, J. G. M., Cooper, Lisa Noelle, George, John C., Bajpai, Sunil·2009·Evolution: Education and Outreach

Abstract

Cetaceans (whales, dolphins, and porpoises) are an order of mammals that originated about 50 million years ago in the Eocene epoch. Even though all modern cetaceans are obligate aquatic mammals, early cetaceans were amphibious, and their ancestors were terrestrial artiodactyls, similar to small deer. The transition from land to water is documented by a series of intermediate fossils, many of which are known from India and Pakistan. We review raoellid artiodactyls, as well as the earliest families of cetaceans: pakicetids, ambulocetids, remingtonocetids, protocetids, and basilosaurids. We focus on the evolution of cetacean organ systems, as these document the transition from land to water in detail.

Overview

Integrity signals

Registry

Crossref · 10.1007/s12052-009-0135-2

Cites

48 of 48 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Verification

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Smaller local successions in the fossil record include intermediate fossils of amphibians, birds, whales, horses, and humans.

    “Smaller local successions are also observable in the fossil record; such as the beautiful strings of intermediate fossils that include amphibians (Kustchera and Elliot, 2013), birds, whales (Thewissen, 2009), horses, and humans.”

    From Science and evolution. (2019) · cites this paper as Thewissen, 2009

Citations

Cites

Flagged first, then by citations

2 of the 50 references couldn’t be matched to a known paper.

Research works printed but not linked: 4

  1. Aslan A, Thewissen JGM. Preliminary evaluation of Kuldana paleosols and implications for interpreting vertebrate fossil assemblages, Kuldana Formation, Northern Pakistan. Palaeovert. 1997;25:261–77.
  2. Fordyce E, Muizon Cd. Evolutionary history of cetaceans: a review. In: Mazin J-M, Buffrénil VD, editors. Secondary adaptation of tetrapods to life in water. 1st ed. Munich: Verlag Friedrich Pfeil; 2001. p. 169–233.
  3. Gingerich PD, Arif M, Bhatti MA, Anwar M, Sanders WJ. Basilosaurus drazindai and Basiloterus hussaini, new Archaeoceti (Mammalia, Cetacea) from the middle Eocene Drazinda Formation, with a revised interpretation of ages of whale-bearing strata in the Khirthar Group of the Sulaiman Range, Punjab (Pakistan). Contr Mus Pal Univ Michigan. 1997;30:55–81.
  4. Gingerich PD, Ul-Haq M, Khan IH, Zalmout I. Eocene stratigraphy and archaeocete whales (Mammalia, Cetacea) of Drug Lahar in the eastern Sulaiman Range, Balochistan (Pakistan). Contr Mus Pal Univ Michigan. 2001a;30:269–319.

Cited by

Sorted by citations

Metadata

Authors
Thewissen, J. G. M., Cooper, L. N., George, J. C., & Bajpai, S.
Affiliations
  • Northeast Ohio Medical University (US)
  • Kent State University (US)
  • North Slope Borough (US)
  • Indian Institute of Technology Roorkee (IN)
Corresponding author
Thewissen, J. G. M.
Venue
Evolution: Education and Outreach
Published
2009-04-16
Volume
2
Issue
2
Pages
272-288
ISSN
  • 1936-6426 (ISSN-L)
  • 1936-6434
OpenAlex
W2143466974
Cited by
178
References
50
Citations by year
2026: 5 · 2025: 6 · 2024: 18 · 2023: 15 · 2022: 15 · 2021: 19 · 2020: 17 · 2019: 15 · 2018: 4 · 2017: 8 · 2016: 7 · 2015: 11 · 2014: 16 · 2013: 11 · 2012: 6
FWCI
2.87
Type
journal article
Language
en
Open access
Locations
Evolution Education and Outreach (publishedVersion, cc-by)
Funders
National Science Foundation
Topics
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Evolution and Paleontology Studies
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Evolutionary Biology
  • Physical Sciences › Environmental Science › Ecology › Marine animal studies overview
Keywords
cetacean evolution, dolphins, porpoises, Artiodactyla, Protocetidae, Basilosauridae, Eocene, fossil cetaceans

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review