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  1. Levendbarende alikruik - Wikipedia

    Littorina arcana Hannaford-Ellis, 1978 (en) World Register of Marine Species: Portaal Biologie: De levendbarende alikruik (Littorina saxatilis) is een slakkensoort uit de familie van de Littorinidae. De wetenschappelijke naam van de soort werd in 1978 voor het eerst geldig gepubliceerd door C. J. Hannaford-Ellis.

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    Littorina arcana extends down from the upper shore to mid shore, where it overlaps with L. compressa. Not all shores support both species and L. compressa has a rather local distribution on moderately exposed to very exposed shores. The shell is distinctively ridged, light coloured and often patterned with dark spiral lines within the grooves.
    This species is reproductively adapted to dry conditions by retaining the eggs in a brood pouch until they hatch into tiny crawling snails. Littorina arcana extends down from the upper shore to mid shore, where it overlaps with L. compressa.
    In this experiment, Hollander and colleagues examined two ecomorphs of one species of snail, Littorina saxatilis and another species, L. littorea ( Hollander et al., 2006 ). L. saxatilis is polymorphic in shell traits; its morphs differ in shell, thickness, and aperture area.
    Despite being cryptic, based on external morphology, Littorina arcana and Littorina saxatilis differ in their mode of female reproduction (egg-laying versus brooding), which may generate a strong post-zygotic barrier. We show that egg-laying and brooding snails are closely related, but genetically distinct.
  3. Littorina arcana - Wikipedia

  4. Web13 jul. 2020 · The relationship between L. saxatilis and its proposed sister species Littorina arcana provides a stark contrast to ecotype …

    • Auteur: Sean Stankowski, Anja M Westram, Zuzanna B Zagrodzka, Isobel Eyres, Thomas Broquet, Kerstin Johannes...
    • Publish Year: 2020
  5. Gewone alikruik - Wikipedia

  6. The genetic basis of a recent transition to live-bearing in marine ...

  7. Macrobenthos of the North Sea - Mollusca: Littorina arcana

  8. (PDF) A potential species-specific molecular marker suggests ...