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X Demographics
Mendeley readers
Attention Score in Context
| Title |
Molecular evidence that echiurans and pogonophorans are derived annelids
|
|---|---|
| Published in |
Proceedings of the National Academy of Sciences of the United States of America, July 1997
|
| DOI | 10.1073/pnas.94.15.8006 |
| Pubmed ID | |
| Authors |
Damhnait McHugh |
| Abstract |
The Annelida, which includes the polychaetes and the clitellates, has long held the taxonomic rank of phylum. The unsegmented, mud-dwelling echiuran spoon worms and the gutless, deep-sea pogonophoran tube worms (including vestimentiferans) share several embryological and morphological features with annelids, but each group also has been considered as a separate metazoan phylum based on the unique characters each group displays. Phylogenetic analyses of DNA sequences from the nuclear gene elongation factor-1alpha place echiurans and pogonophorans within the Annelida. This result, indicating the derived loss of segmentation in echiurans, has profound implications for our understanding of the evolution of metazoan body plans and challenges the traditional view of the phylum-level diversity and evolutionary relationships of protostome worms. |
X Demographics
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Italy | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Scientists | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 165 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 5 | 3% |
| Germany | 4 | 2% |
| Brazil | 4 | 2% |
| Mexico | 3 | 2% |
| Malaysia | 2 | 1% |
| France | 1 | <1% |
| United Kingdom | 1 | <1% |
| Russia | 1 | <1% |
| Portugal | 1 | <1% |
| Other | 2 | 1% |
| Unknown | 141 | 85% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 49 | 30% |
| Student > Ph. D. Student | 27 | 16% |
| Student > Master | 16 | 10% |
| Professor | 15 | 9% |
| Professor > Associate Professor | 14 | 8% |
| Other | 29 | 18% |
| Unknown | 15 | 9% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 117 | 71% |
| Environmental Science | 15 | 9% |
| Biochemistry, Genetics and Molecular Biology | 6 | 4% |
| Earth and Planetary Sciences | 6 | 4% |
| Arts and Humanities | 1 | <1% |
| Other | 4 | 2% |
| Unknown | 16 | 10% |
Attention Score in Context
This research output has an Altmetric Attention Score of 4. 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 11 November 2022.
All research outputs
#7,080,750
of 24,625,114 outputs
Outputs from Proceedings of the National Academy of Sciences of the United States of America
#59,831
of 101,438 outputs
Outputs of similar age
#9,083
of 30,219 outputs
Outputs of similar age from Proceedings of the National Academy of Sciences of the United States of America
#241
of 463 outputs
Altmetric has tracked 24,625,114 research outputs across all sources so far. This one has received more attention than most of these and is in the 69th percentile.
So far Altmetric has tracked 101,438 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 38.8. This one is in the 39th percentile – i.e., 39% of its peers scored the same or lower than it.
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 30,219 tracked outputs that were published within six weeks on either side of this one in any source. This one has gotten more attention than average, scoring higher than 69% of its contemporaries.
We're also able to compare this research output to 463 others from the same source and published within six weeks on either side of this one. This one is in the 47th percentile – i.e., 47% of its contemporaries scored the same or lower than it.