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Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Classis: Mammalia
Subclassis: Theria
Infraclassis: Placentalia
Ordo: Primates
Subordo: Strepsirrhini
Infraordo: †Adapiformes
Familia: Notharctidae
Subfamilia: Cercamoniinae
Genus: Darwinius
Species: D. masillae


Franzen et al., 2009


* Jens L. Franzen et al., 2009, Complete Primate Skeleton from the Middle Eocene of Messel in Germany: Morphology and Paleobiology [1]
* [2]

Darwinius is a genus of Adapiformes, a group of basal primates from the Eocene epoch. Its only known species is Darwinius masillae, dated to 47 million years ago (Lutetian stage) based on dating of the fossil site.[1]

The only known fossil, dubbed Ida, was discovered in 1983[2] at the Messel pit. The fossil, divided into a slab and partial counterslab after the amateur excavation and sold separately, was not reassembled until 2007. The fossil is of a juvenile female, approximately 58 cm (23 in) overall length, with the head and body length excluding the tail being about 24 cm (9.4 in). It is estimated that Ida died at about 80–85% of her projected adult body and limb length.[3]

The genus Darwinius was named in commemoration of the bicentenary of the birth of Charles Darwin, and the species name masillae honors Messel where the specimen was found. The creature appeared superficially similar to a modern lemur.[3][4]

The authors of the paper describing Darwinius classified it as a member of the primate family Notharctidae, subfamily Cercamoniinae,[3] suggesting that it has the status of a significant transitional form (a "link") between the prosimian and simian ("anthropoid") primate lineages.[5] Others have disagreed with this placement.[6][7][8]

Concerns have been raised about the claims made about the fossil's relative importance, and the publicising of the fossil before adequate information was available for scrutiny by the academic community.[4]


Franzen et al. (2009) place the Darwinius genus in the Cercamoniinae subfamily of the Notharctidae family within the extinct Adapiformes suborder of early primates.[3]

Darwinius masillae is the third primate species to be discovered at the Messel locality that belongs to the cercamoniine adapiforms, in addition to Europolemur koenigswaldi and Europolemur kelleri. Darwinius masillae is similar but not directly related to Godinotia neglecta from Geiseltal.

The adapiforms are early primates which are known only from the fossil record, and it is unclear whether they form a suborder proper, or a paraphyletic grouping. They are usually grouped under Strepsirrhini—including Lemurs, Aye-ayes and Lorisiformes—and as such would not be ancestral to Haplorrhini which includes tarsiers and simians.[9] Simians are usually called anthropoids, and while this name can be confusing, the paper uses the term anthropoids, as does associated publicity material. Simians (anthropoids) include monkeys and apes, which in turn includes humans.[10]
CT image of the skull of Darwinius

Franzen et al. in their 2009 paper place Darwinius in the "Adapoidea group of early primates representative of early haplorhine diversification". This means that according to these authors, the adapiforms would not be entirely within the Strepsirrhini lineage as hitherto assumed but would qualify as a transitional fossil (a "missing link") between Strepsirrhini and Haplorrhini, and so could be ancestral to humans. They also suggest that tarsiers have been misplaced in the Haplorrhini, and should be considered Strepsirrhini. To support this view, they show that as many as 6 morphological traits found in "Darwinius" are derived characters present only in the Haplorrhini lineage but absent in the Strepsirrhini lineage, which they interpret as synapomorphies. These include, among others, a cranium with a short rostrum, deep mandibular ramus, loss of all grooming claws. They note "that Darwinius masillae, and adapoids contemporary with early tarsioids, could represent a stem group from which later anthropoid primates evolved, but we are not advocating this here, nor do we consider either Darwinius or adapoids to be anthropoids."[3]

Concerns over cladistic analysis

Paleontologists have expressed concern that the cladistic analysis compared only 30 traits, when standard practice is to analyze 200 to 400 traits and to include fossils such as anthropoids from Egypt and the primate genus Eosimias which were not included in the analysis. This contrasts with the motive openly stated by the authors, which was to list 30 anatomical and morphological characteristics "commonly used" to distinguish extant strepsirrhine and haplorrhine primates.[3] Paleontologist Richard Kay of Duke University thought the data could have been cherry-picked, and paleontologist Callum Ross of the University of Chicago considered the claim that Darwinius should be classified as haplorhine was "unsupportable in light of modern methods of classification."[11] The opinion of Chris Beard, curator of vertebrate paleontology at the Carnegie Museum of Natural History, was that Darwinius was not a "missing link" between anthropoids and more primitive primates, but that further study of this remarkably complete specimen would be very informative and could reveal relationships amongst "the earliest and least human-like of all known primates, the Eocene adapiforms."[12] In an interview published on 27 May, Jørn Hurum stated that he had an open mind about the possibility that the fossil might turn out to be a lemur, and that a paper on systematics to be published within about a year would mainly focus on the partial counterslab containing the inner ear and the foot bones.[13]

Most experts hold that the higher primates (simians) evolved from Tarsiidae, branching off the Strepsirrhini before the appearance of the Adapiformes. A smaller group agrees with Franzen et al. that the higher primates descend from Adapiformes (Adapoidea). The view of paleontologist Tim White is that Darwinius is unlikely to end the argument.[14]

Philip D. Gingerich states that the seven superfamilies of Primates are commonly associated in the higher taxonomic groupings of suborders Anthropoidea and Prosimii as an alternative to Haplorhini and Strepsirrhini, depending on the position of Adapoidea and Tarsioidea. He puts forward a phylogeny in which the higher primates evolved from Darwinius, which he groups with other Adapoidea. He shows the Adapoidea together the Tarsioidea as representing early diversification of the suborder Haplorhini, and shows the Strepsirrhini as having branched off directly from the earliest primates.[15] The Revealing the Link website uses this taxonomic grouping, and states that Darwinii is from an early group of primates, just prior to diversification into the anthropoids (monkeys, apes and humans) and the prosimians (lemurs, lorises and tarsiers).[16]

Erik Seiffert and colleagues at Stony Brook University argue that Darwinius is on the branch towards the Strepsirrhini, and is not a 'missing link' in the evolution of the Anthropoidea.[17] A phylogenetic analysis of 360 morphological characters in 117 extinct and modern primates places Darwinius in a now-extinct group of strepsirrhines, along with a newly discovered 37-million-year-old Egyptian primate, Afradapis. Seiffert believes that characteristics that appeared to show a relationship to haplorrhines are due to convergent evolution,[18] and has said that "the PR hype surrounding the Darwinius description was very confusing.”[19]

Type specimen
Counter-slab of the Darwinius masillae holotype fossil (specimen WDC-MG-210 reversed for comparison). Parts 1 and 2 (enclosed in dashed lines) are genuine; remainder of plate B was fabricated during preparation

The type specimen is a 95%-complete fossil, missing only its left rear leg. It has been named Ida[4] after the daughter of Jørn Hurum, the Norwegian vertebrate paleontologist from the Natural History Museum, University of Oslo, who secured one section of the fossil from an anonymous owner, and led the research.[20] In addition to the bones, remains of Ida's soft tissue and fur outline are present, along with remnants of her last meal of fruit and leaves. The animal is about 58 cm (23 in) from nose to tail, or roughly the size of a small, long-tailed cat.

The lemur-like skeleton of the fossil features primate characteristics of grasping hands with opposable thumbs and nails instead of claws. These would have provided a "precision grip" which, for Ida, was useful for climbing and gathering fruit. Ida also has flexible arms and relatively short limbs.[21] The fossil is missing two anatomical features found in modern lemurs: a grooming claw on the foot and a fused row of teeth, a toothcomb, in the bottom jaw.[22]

Digital reconstructions of Ida's teeth reveal that she has unerupted molars in her jaw, indicating by comparison with modern squirrel monkeys that she was 9–10 months old, and would have reached adulthood at 36 months. The shape of Ida's teeth provides clues as to her diet; jagged molars would have allowed her to slice food, suggesting that she was a leaf and seed eater. This is confirmed by the remarkable preservation of her gut content. Furthermore the lack of a baculum (penis bone) found in all lower primates means that the fossil was from a female.[3] X-rays performed on Ida revealed that her right wrist was healing from a fracture, which may have contributed to her death. The scientists speculate whether she was overcome by carbon dioxide fumes while drinking from the Messel lake. Hampered by her broken wrist, she slipped into unconsciousness, was washed into the lake and sank to the bottom, where unique fossilisation conditions preserved her for 47 million years.[21][23]

Discovery and acquisition
Map showing where Darwinius (6) and other primates have been found in the Messel pit

The events regarding the original unearthing of the fossil are not clear, though some facts are known. It was found at the Messel pit in 1983, a disused shale quarry noted for its astonishing fossil preservation, near the village of Messel, about 35 km (22 mi) southeast of Frankfurt am Main in Germany. The fossil came as a slab and partial counter slab, and was expertly prepared by encasing each slab in resin using the transfer technique necessary to conserve Messel fossils. At some point the slab and counter slab went separate ways. The counter slab was incorporated in a composite of fabricated parts to represent a complete specimen, and arrived at a private Wyoming museum in 1991. Analysis by Jens Franzen of the Natural History Museum of Basel, Switzerland revealed the mixed actual and faked nature of this slab.[24] A comparison of the two slabs indicates that the forger had access to the whole fossil.
Radiographs of the Darwinius holotype fossil, revealing the fabricated parts of the counter-slab

The primary slab remained in Germany, in the possession of a private collector who kept it secret for twenty years before deciding to sell it anonymously via a German fossil dealer.[25] Two German museums turned it down as too expensive, then a year later at the Hamburg Fossil and Mineral Fair in December 2006 the dealer asked Norwegian vertebrate palaeontologist Jørn Hurum, who had done some previous deals, to discuss something privately. The dealer showed Hurum three high resolution colour photographs of the fossil, and told him that the asking price was $1 million. Hurum knew that it was a primate, and according to Tudge's book "was fast concluding that the specimen he was looking at could be one of the holy grails of science — the 'missing link' from the crucial time period." He asked for time until after Christmas to organise funding to pay for the specimen and ensure that it had been legally collected, had an export permit and would be legitimately available for study. His first choice was the Natural History Museum of Oslo, but it was beyond their means and he began to think of other museums with sponsors available. He persuaded the Oslo museum to make half the funding available, with the remainder to be paid only after X-ray scans proved conclusively that it was not a fake, a process which took several months. He put together a team including leading German experts on the Messel fossils, ensuring international ownership.[26][27]

After its acquisition it was studied in secret for two years by a team of scientists lead by Hurum; who was joined by primate evolution expert Professor Philip Gingerich of the University of Michigan, and palaeontologists Jens Franzen who had studied the counter slab and Jörg Habersetzer of the Senckenberg Museum's Research Institute.

While studies were in progress, negotiations were put in place for a book and with various broadcasters for documentary programs, all of whom agreed to keep the project secret. A deal went through in the summer of 2008 with The History Channel which has been reported as paying more for this than any other documentary.[28] The team decided to publish their findings online in PLoS ONE, an open access journal of the Public Library of Science. The paper for publication was received by PLoS ONE on March 19, 2009, and accepted on May 12, 2009.[3]

On May 10, 2009, the Daily Mail published reports that the BBC had made a documentary revealing the discovery of what might be a vital ‘missing link’ in human evolution, giving an outline of the study and its intended publication date as well as a brief statement from Gingerich.[29] On 15 May the Wall Street Journal carried a report with interviews with Gingerich and with Tim White, who cautioned that "Lemur advocates will be delighted, but tarsier advocates will be underwhelmed".[30] At about the same time a press release headed "World Renowned Scientists Reveal a Revolutionary Scientific Find That Will Change Everything" announced that the find was "lauded as the most significant scientific discovery of recent times."[31][32]

On May 19, 2009, the team revealed their findings to the world at a press conference, simultaneously with online publication of the paper in PLoS ONE (for naming purposes, the paper was officially published in print on May 21, 2009).[3] The paper included a statement that the authors were not advocating the possibility that the species could be ancestral to later anthropoid primates; Professor John Fleagle, of Stony Brook University in New York state, asserted that he was one of the anonymous scientific reviewers of the paper, and that he had explicitly requested before publication that the authors tone down their original claims that the fossil was on the human evolutionary line.[33] At the press conference, the fossil was described as the "missing link" in human evolution. Hurum said that “This fossil rewrites our understanding of the evolution of primates... It will probably be pictured in all the textbooks for the next 100 years," and compared its importance to the Mona Lisa.[34] He also said that Darwinius was "the closest thing we can get to a direct ancestor" and that finding it was "a dream come true". Team member Jens Franzen said the state of preservation was "like the Eighth Wonder of the World", with information "palaeontologists can normally only dream of", but while he said it bore "a close resemblance to ourselves" in some aspects, other features indicated that it was not a direct ancestor.[4]

Independent experts were quick to question the claims. Henry Gee, a senior editor at Nature, said the term "missing link" was misleading and that the scientific community would need to evaluate its significance, which was unlikely to match that of Homo floresiensis or feathered dinosaurs. Chris Beard, curator of the Carnegie Museum of Natural History, said he "would be absolutely dumbfounded if it turns out to be a potential ancestor to humans."[4]

Publicity and media coverage
Life restoration of Darwinius

Having previously experienced how the blogosphere had picked up on his work, and seen Chinese dinosaur finds the object of bad early descriptions from blogging, Jørn Hurum decided to orchestrate launch of the fossil in a combined scientific and public event. Atlantic Productions, which had cooperated with Hurum on a program on the Predator X, a giant pliosaur from Svalbard, was brought in on the project in order to "take story straight to the masses in a way that would appeal to the average person, especially kids".[35] The press conference and paper on the fossil was accompanied by the launch of a website,[36] the publication of a book which had already been distributed to bookstores, The Link: Uncovering Our Earliest Ancestor by Colin Tudge,[37] and the announcement of a documentary (Uncovering Our Earliest Ancestor: The Link), made by Atlantic Productions in the UK, directed by Tim Walker and produced by Lucie Ridout, to be screened six days later on the History Channel (US), BBC One (UK),[28] and various stations in Germany and Norway. The New York Daily News noted that "The unveiling of the fossil came as part of an orchestrated publicity campaign unusual for scientific discoveries."[38]

One of the paper's co-authors, paleontologist Philip D. Gingerich, expressed dissatisfaction with the media campaign, telling The Wall Street Journal that they had chosen to publish in PLoS ONE as "There was a TV company involved and time pressure" and they had been pushed to finish the study. "It's not how I like to do science," Gingerich concluded.[14] In an interview, Jørn Hurum said that PLoS ONE had been chosen as it was open access and the research had been funded by Norwegian taxpayers who would benefit from free access, it did not restrict the length of manuscript or number of illustrations, and "PLoS ONE is the quickest way to publish a large work in the world!"[35]

At the time its discovery was announced in the scientific[3] and the popular[39] press, the fossil was characterized as the "most complete fossil primate ever discovered"; Sir David Attenborough has described it as "extraordinary".[40] Google commemorated the unveiling with a themed logo on May 20, 2009.[41] During a ceremony at the American Museum of Natural History Hurum said that "This specimen is like finding the Lost Ark for archeologists" and "It is the scientific equivalent of the Holy Grail. This fossil will probably be the one that will be pictured in all textbooks for the next 100 years."[38] Regarding the publicity, Matt Cartmill an anthropologist from Duke University said "The P.R. campaign on this fossil is I think more of a story than the fossil itself".[42]

Independent experts have raised concern about publicity exaggerating the importance of the find before information was available for scrutiny. Chris Beard, curator of the Carnegie Museum of Natural History, was "awestruck" by the publicity machine but concerned that if the hype was exaggerated, it could damage the popularisation of science if the creature was not all that it was hyped up to be.[4] Paleoanthropologist Elwyn Simons of Duke University stated that it is a wonderful specimen but most of the information had been previously known, and paleoanthropologist Peter Brown of the University of New England said that the paper had insufficient evidence that Darwinius was ancestral to the simians.[14] Others have also criticized claims that the fossil represents the "missing link in human evolution", arguing that there is no such thing unless evolution is visualized as a chain as there are an enormous number of missing branches, and that while the fossil is a primate, there is no evidence to suggest that its species is a direct ancestor of humans.[6][43] ScienceBlogger Brian Switek questioned the sensationalist coverage of claims of ancestral relationships made before a full cladistic analysis,[44] and in a column in The Times he stated that a unique opportunity to communicate science had been lost, with press releases forestalling the necessary discovery and debate which should now proceed.[45]

Hurum considered that the risk of buying the fossil had paid off, and said that "You need an icon or two in a museum to drag people in, this is our Mona Lisa and it will be our Mona Lisa for the next 100 years."[25] He has been described as "a modern-era, media-savvy scientist with the right amounts of showmanship, populist sensibility, and disregard for the normal avenues of scientific prestige required to pull this off." The debut in "an astonishingly slick, multi-component media package" required exceptional coordination between networks, museums, producers and scientists while maintaining a level of secrecy which is hard to attain in modern circumstances.[28] In interviews published on 27 May, Hurum stated that it was good that they had got the message out that primates were rooted deep in time, but that some of the slogans were too much and the publicity got completely out of control.[13] He disclosed that he paid nearly $750,000 (£465,000) for the specimen, but felt it was worthwhile to make the fossil available for scientific investigation instead of it being bought by a private collector and hidden away. Others including Chris Beard were concerned that the price and publicity could lead to profiteering by amateur collectors, and make acquisition of specimens for research purposes more difficult.[46]

TV documentary about Ida

The following TV documentary about Ida has been broadcast. The US version is available on DVD.[47]

«Uncovering Our Earliest Ancestor: The Link», BBC, UK, broadcast on 26 May 2009.

«The Link», History Channel, USA, broadcast 25 May 2009.

«Terra X: Die geheime Entdeckung», broadcast multiple times on multiple German TV channels, the last time on 16 January 2011 on ZDF Neo.


1. ^ Mertz, D.F., Renne, P.R. (2005): A numerical age for the Messel fossil deposit (UNESCO World Heritage Site) derived from 40Ar/39Ar dating on a basaltic rock fragment. Courier Forschungsinstitut Senckenberg no 255: pp 7–75.
2. ^ Randerson, James (May 20, 2009). "Deal in Hamburg bar led scientist to Ida fossil, the 'eighth wonder of the world'". London: The Guardian. Retrieved 2009-05-20.
3. ^ a b c d e f g h i j Franzen, J. L.; Gingerich, P. D.; Habersetzer, J.; Hurum, J. H.; Von Koenigswald, W.; Smith, B. H. (2009). J., Hawks. ed. "Complete Primate Skeleton from the Middle Eocene of Messel in Germany: Morphology and Paleobiology" (PDF). PLoS ONE 4 (5): e5723. doi:10.1371/journal.pone.0005723. PMID 19492084. PMC 2683573. edit
4. ^ a b c d e f Christine McGourty (19 May 2009). "Science & Environment; Scientists hail stunning fossil". BBC News. Retrieved 2009-05-20.
5. ^ Wilford, John Noble (May 16, 2009). "Analysis Shows German Fossil to Be Early Primate". New York Times.
6. ^ a b Chris Beard (May 21, 2009). "Why Ida fossil is not the missing link". New Scientist. Reed Business Information. Retrieved 2009-05-22.
7. ^ Fossil primate challenges Ida's place Nature 461, 1040 (2009)
8. ^ | "‘Missing link’ primate isn’t a link after all"
9. ^ Callum Ross, Richard F. Kay, Anthropoid origins: new visions, Springer, 2004, ISBN 9780306481208, p. 100
10. ^ Wilson & Reeder 2005, Simiiformes
11. ^ Ann Gibbons (19 May 2009). ""Revolutionary" Fossil Fails to Dazzle Paleontologists -- Gibbons 2009 (519): 1 -- ScienceNOW". ScienceNOW Daily News. American Association for the Advancement of Science. Retrieved 2009-05-28.
12. ^ Chris Beard. "Why Ida fossil is not the missing link - opinion - 21 May 2009 - New Scientist". Retrieved 2009-05-28.
13. ^ a b Rowan Hooper; Colin Barras (27 May 2009). "Q&A: Jørn Hurum on Ida, media hype and primate evolution - life - 27 May 2009 - New Scientist". Retrieved 2009-05-28.
14. ^ a b c Dayton, Leigh (May 21, 2009). "Scientists divided on Ida as the missing link". The Australian.,25197,25515021-2702,00.html. Retrieved 2009-05-21. [dead link]
15. ^ Philip D. Gingerich (June 2, 2009). "Research on the Origin and Early Evolution of Primates". Retrieved 2009-06-03.
16. ^ "Revealing the Link - Who Is Ida? - From Ida to Us". Retrieved 2009-06-03. [dead link]
17. ^ Seiffert, Erik R.; Jonathan M. G. Perry, Elwyn L. Simons & Doug M. Boyer (22 October 2009). "Convergent evolution of anthropoid-like adaptations in Eocene adapiform primates". Nature (Nature Publishing Group) 461 (7267): 1118–1121. doi:10.1038/nature08429. PMID 19847263.
18. ^ Barras, Colin (21 October 2009). "'Missing link' Ida lacks evolutionary insights". New Scientist. Retrieved 2009-10-21.
19. ^ Henderson, Mark (21 October 2009). "Fossil hailed as Man's ancestor is 'not even close relative'". The Times (London). Retrieved 2009-10-21.
20. ^ "Norske forskere: – Har funnet «the missing link»". Retrieved 2009-05-20.
21. ^ a b ""MISSING LINK" FOUND: New Fossil Links Humans, Lemurs?". National Geographic. May 19, 2009. Retrieved 2009-05-20.
22. ^ "Early Primate Provides Evolution Clues". ABC News. May 19, 2009.
23. ^ Scientists Unveil Missing Link In Evolution An early article on
24. ^ Franzen, J.L. (1994), in Anthropoid Origins (eds Fleagle, J. F. & Kay, R. F.)pp 99-122 (Plenum, New York)
25. ^ a b Fossil Ida: extraordinary find is 'missing link' in human evolution, a 19 May 2009 article from The Guardian
26. ^ James Randerson (19 May 2009). "Fossil Ida: A profile of palaeontologist Jørn Hurum | Science |". London: The Guardian. Retrieved 2009-05-25.
27. ^ Tudge 2009, pp. 11–15
28. ^ a b c Elizabeth Cline (May 22, 2009). "Ida-lized! The Branding of a Fossil § SEEDMAGAZINE.COM". Seed (magazine). Retrieved 2009-05-23.
29. ^ Sharon Churcher (10 May 2009). "Is David Attenborough set to reveal the Missing Link in human evolution? | Mail Online". London: Daily Mail. Retrieved 2009-05-24.
30. ^ Naik, Gautam (2009-05-15). "Fossil Discovery Is Heralded —". The Wall Street Journal. Retrieved 2009-05-24.
31. ^ Brian Switek (May 18, 2009). "A Discovery That Will Change Everything (!!!) ... Or Not : Laelaps". Retrieved 2009-05-24.
32. ^ "Ida the fossil will reveal her secrets slowly | Adam Rutherford | Comment is free |". London: The Guardian. 20 May 2009. Retrieved 2009-05-24.
33. ^ James Randerson (19 May 2009). "Is the Ida fossil a missing evolutionary link? | Science". London: The Guardian. Retrieved 2009-06-06.
34. ^ Jonathan Leake; John Harlow (May 24, 2009). "Origin of the Specious — Times Online". London: The Sunday Times. Retrieved 2009-05-24.
35. ^ a b "Introducing Darwinius masillae « everyONE – the PLoS ONE community blog". Retrieved 2009-05-24.
36. ^ Hurum, Jørn (2009). "". Retrieved 2009-05-20.
37. ^ Tudge, Colin. (2009). The Link: Uncovering Our Earliest Ancestors. Little Brown.
38. ^ a b Samantha Strong and Rich Schapiro (May 19, 2009). "Missing link found? Scientists unveil fossil of 47 million-year-old primate, Darwinius masillae". Retrieved 2009-05-20.
39. ^ A History Channel documentary, The Link, devoted to the discovery is slated to air 25 May 2009.
40. ^ The Implications from
41. ^ "The Missing Link – Google Fossil Logo 2009". Google. May 20, 2009. Retrieved 2009-05-20.
42. ^ "Amid Media Circus, Scientists Doubt 'Ida' Is Your Ancestor". Livescience. May 21, 2009. Retrieved 2009-05-21.
43. ^ Etheridge, Eric (May 20, 2009). "Let's Not Go Ape Over Ida". New York Times. Retrieved 2009-05-20.
44. ^ Brian Switek (May 19, 2009). "Poor, poor Ida, Or: "Overselling an Adapid": Laelaps". Retrieved 2009-05-20.
45. ^ Switek, Brian (26 May 2009). "The dangerous link between science and hype". The Times (London). Retrieved 2009-05-25.
46. ^ Hannah Devlin (May 28, 2009). "Jorn Hurum: I paid $750,000 for Ida the fossil and have no regrets - Times Online". London: The Times. Retrieved 2009-05-28.
47. ^

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