Contributions to Zoology, 86 (4) – 2017

An unexpected twist: Sperm cells coil to the right in land snails and to the left in song birds

Menno Schilthuizen1, Rob Langelaan2, Nicola Hemmings3, Wesley van Oostenbrugge4, Stefan Visser5

1.  Naturalis Biodiversity Center, Darwinweg 2, 2333CR Leiden, the Netherlands. Institute Biology Leiden, Leiden University, Sylviusweg 72, 2333BE Leiden, the Netherlands. Corresponding author: menno.schilthuizen@naturalis.nl

2.  Naturalis Biodiversity Center, Darwinweg 2, 2333CR Leiden, the Netherlands

3.  Department of Animal and Plant Sciences, University of Sheffield, Western Bank,Sheffield S10 2TN, UK

4.  Naturalis Biodiversity Center, Darwinweg 2, 2333CR Leiden, the Netherlands. Forensic Science Dept., Amsterdam University of Applied Sciences, Weesperzijde 190, 1097 DZ Amsterdam, the Netherlands

5.  Naturalis Biodiversity Center, Darwinweg 2, 2333CR Leiden, the Netherlands. Forensic Science Dept., Amsterdam University of Applied Sciences, Weesperzijde 190, 1097 DZ Amsterdam, the Netherlands

Keywords: Gastropoda,Passeriformes,spermatozoa,chirality,dextral,sinistral