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The ‘Tully monster’ is a vertebrate

Overview of attention for article published in Nature, March 2016
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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 (99th percentile)

Mentioned by

news
185 news outlets
blogs
14 blogs
twitter
682 tweeters
facebook
17 Facebook pages
wikipedia
2 Wikipedia pages
googleplus
31 Google+ users
reddit
3 Redditors
video
2 video uploaders

Readers on

mendeley
74 Mendeley
citeulike
1 CiteULike
Title
The ‘Tully monster’ is a vertebrate
Published in
Nature, March 2016
DOI 10.1038/nature16992
Pubmed ID
Authors

Victoria E. McCoy, Erin E. Saupe, James C. Lamsdell, Lidya G. Tarhan, Sean McMahon, Scott Lidgard, Paul Mayer, Christopher D. Whalen, Carmen Soriano, Lydia Finney, Stefan Vogt, Elizabeth G. Clark, Ross P. Anderson, Holger Petermann, Emma R. Locatelli, Derek E. G. Briggs, McCoy, Victoria E, Saupe, Erin E, Lamsdell, James C, Tarhan, Lidya G, McMahon, Sean, Lidgard, Scott, Mayer, Paul, Whalen, Christopher D, Soriano, Carmen, Finney, Lydia, Vogt, Stefan, Clark, Elizabeth G, Anderson, Ross P, Petermann, Holger, Locatelli, Emma R, Briggs, Derek E G

Abstract

Problematic fossils, extinct taxa of enigmatic morphology that cannot be assigned to a known major group, were once a major issue in palaeontology. A long-favoured solution to the 'problem of the problematica', particularly the 'weird wonders' of the Cambrian Burgess Shale, was to consider them representatives of extinct phyla. A combination of new evidence and modern approaches to phylogenetic analysis has now resolved the affinities of most of these forms. Perhaps the most notable exception is Tullimonstrum gregarium, popularly known as the Tully monster, a large soft-bodied organism from the late Carboniferous Mazon Creek biota (approximately 309-307 million years ago) of Illinois, USA, which was designated the official state fossil of Illinois in 1989. Its phylogenetic position has remained uncertain and it has been compared with nemerteans, polychaetes, gastropods, conodonts, and the stem arthropod Opabinia. Here we review the morphology of Tullimonstrum based on an analysis of more than 1,200 specimens. We find that the anterior proboscis ends in a buccal apparatus containing teeth, the eyes project laterally on a long rigid bar, and the elongate segmented body bears a caudal fin with dorsal and ventral lobes. We describe new evidence for a notochord, cartilaginous arcualia, gill pouches, articulations within the proboscis, and multiple tooth rows adjacent to the mouth. This combination of characters, supported by phylogenetic analysis, identifies Tullimonstrum as a vertebrate, and places it on the stem lineage to lampreys (Petromyzontida). In addition to increasing the known morphological disparity of extinct lampreys, a chordate affinity for T. gregarium resolves the nature of a soft-bodied fossil which has been debated for more than 50 years.

Twitter Demographics

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Mendeley readers

The data shown below were compiled from readership statistics for 74 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
United Kingdom 4 5%
United States 4 5%
Japan 2 3%
Sweden 2 3%
Germany 1 1%
Portugal 1 1%
Switzerland 1 1%
France 1 1%
Finland 1 1%
Other 3 4%
Unknown 54 73%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 22 30%
Researcher 22 30%
Student > Bachelor 10 14%
Student > Master 7 9%
Professor 3 4%
Other 10 14%
Readers by discipline Count As %
Agricultural and Biological Sciences 38 51%
Earth and Planetary Sciences 18 24%
Environmental Science 4 5%
Biochemistry, Genetics and Molecular Biology 4 5%
Chemistry 3 4%
Other 7 9%

Attention Score in Context

This research output has an Altmetric Attention Score of 1952. 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 22 February 2017.
All research outputs
#277
of 7,821,773 outputs
Outputs from Nature
#77
of 46,456 outputs
Outputs of similar age
#31
of 278,837 outputs
Outputs of similar age from Nature
#6
of 1,051 outputs
Altmetric has tracked 7,821,773 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 46,456 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 71.6. This one has done particularly well, scoring higher than 99% 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 278,837 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 1,051 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 99% of its contemporaries.