Evidence map›Paper›PMID 16777754›Full record

ArticleProceedings. Biological sciences2006

Living males of the 'ancient asexual' Darwinulidae (Ostracoda: Crustacea).

Robin J Smith, Takahiro Kamiya, David J Horne

Open access · greenAbstract read
In one paragraph

Article in Proceedings. Biological sciences, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
13.2field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

19 citing papers in PubMed, 96 citations in OpenAlex.

  1. Loss, persistence and reversal of phenotypic traits.Biological reviews of the Cambridge Philosophical Society · 2026
    Review
  2. OnZooKeys · 2026
    Article
  3. "Jack-of-all-trades" is parthenogenetic.Ecology and evolution · 2022
    Article
  4. Article
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  7. Sex and the Imperfect Fungi.Microbiology spectrum · 2017
    Review
  8. Article
  9. Spermatozoa Production by Triploid Males in the New Zealand Freshwater SnailBiological journal of the Linnean Society. Linnean Society of London · 2013
    Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Review
  16. Article
  17. Article
  18. Reevolution of sexuality breaks Dollo's law.Proceedings of the National Academy of Sciences of the United States of America · 2007
    Article
  19. Brood care in a Silurian ostracod.Proceedings. Biological sciences · 2007
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 3 institutions in 2 countries.

Robin J SmithLake Biwa Museum, 1091 Oroshimo, Kusatsu, Shiga 525-0001, Japan. smith@lbm.go.jp
Takahiro Kamiya
David J Horne
Kanazawa University · JPLake Biwa Museum · JPNatural History Museum · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Three living male darwinulid ostracods of a new species of the genus Vestalenula have been found in Yakushima, Japan. This is the first report of living darwinulid males for over 100 years and their morphology casts doubt on the two previous records from the late 1800' s. The presence of male darwinulids also calls into question the hypothesis that the family Darwinulidae is an exclusively ancient asexual group, reproducing without sex for over 200 million years (Myr). Male carapaces are of similar size and shape to A-1 juvenile females of the same species, suggesting that males may have been dismissed as A-1 juveniles in other living and fossil species. The antennae and fifth limbs are sexually dimorphic: the male antennae have six segments compared with five in the female and a series of putative chemical receptors originating at the extra segment boundary, while the male fifth limbs have well-developed grasping hooks, as in males of many ostracod groups. The lack of Zenker's Organ and of complex internal structures within the hemipenis contradicts previous hypotheses of the phylogenetic position of darwinulids.

Indexed as

Reproduction, AsexualAnimalsCrustaceaFemaleJapanMalePhylogenySex CharacteristicsSpecies Specificity

Identifiers

PMID16777754
PMCPMC1560310
OpenAlexW2132058330

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.