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About this Attention Score

  • In the top 5% of all research outputs scored by Altmetric
  • High Attention Score compared to outputs of the same age (99th percentile)
  • High Attention Score compared to outputs of the same age and source (91st percentile)

Mentioned by

33 news outlets
8 blogs
179 tweeters
12 Facebook pages
41 Wikipedia pages
6 Google+ users
3 Redditors
4 video uploaders


112 Dimensions

Readers on

263 Mendeley
1 CiteULike
A Middle Triassic stem-turtle and the evolution of the turtle body plan
Published in
Nature, June 2015
DOI 10.1038/nature14472
Pubmed ID

Rainer R. Schoch, Hans-Dieter Sues


The origin and early evolution of turtles have long been major contentious issues in vertebrate zoology. This is due to conflicting character evidence from molecules and morphology and a lack of transitional fossils from the critical time interval. The ∼220-million-year-old stem-turtle Odontochelys from China has a partly formed shell and many turtle-like features in its postcranial skeleton. Unlike the 214-million-year-old Proganochelys from Germany and Thailand, it retains marginal teeth and lacks a carapace. Odontochelys is separated by a large temporal gap from the ∼260-million-year-old Eunotosaurus from South Africa, which has been hypothesized as the earliest stem-turtle. Here we report a new reptile, Pappochelys, that is structurally and chronologically intermediate between Eunotosaurus and Odontochelys and dates from the Middle Triassic period (∼240 million years ago). The three taxa share anteroposteriorly broad trunk ribs that are T-shaped in cross-section and bear sculpturing, elongate dorsal vertebrae, and modified limb girdles. Pappochelys closely resembles Odontochelys in various features of the limb girdles. Unlike Odontochelys, it has a cuirass of robust paired gastralia in place of a plastron. Pappochelys provides new evidence that the plastron partly formed through serial fusion of gastralia. Its skull has small upper and ventrally open lower temporal fenestrae, supporting the hypothesis of diapsid affinities of turtles.

Twitter Demographics

The data shown below were collected from the profiles of 179 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 263 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Germany 5 2%
Brazil 4 2%
United States 3 1%
United Kingdom 2 <1%
Japan 2 <1%
Argentina 2 <1%
Italy 1 <1%
Canada 1 <1%
Serbia 1 <1%
Other 0 0%
Unknown 242 92%

Demographic breakdown

Readers by professional status Count As %
Student > Bachelor 55 21%
Student > Ph. D. Student 46 17%
Researcher 39 15%
Student > Master 33 13%
Student > Doctoral Student 14 5%
Other 44 17%
Unknown 32 12%
Readers by discipline Count As %
Agricultural and Biological Sciences 111 42%
Earth and Planetary Sciences 53 20%
Biochemistry, Genetics and Molecular Biology 23 9%
Environmental Science 13 5%
Computer Science 4 2%
Other 15 6%
Unknown 44 17%

Attention Score in Context

This research output has an Altmetric Attention Score of 447. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 23 March 2023.
All research outputs
of 23,420,064 outputs
Outputs from Nature
of 92,291 outputs
Outputs of similar age
of 265,348 outputs
Outputs of similar age from Nature
of 999 outputs
Altmetric has tracked 23,420,064 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 99th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 92,291 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 100.3. This one has done particularly well, scoring higher than 95% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 265,348 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 99% of its contemporaries.
We're also able to compare this research output to 999 others from the same source and published within six weeks on either side of this one. This one has done particularly well, scoring higher than 91% of its contemporaries.