Patency of apertural barriers in clausiliids with different reproductive strategies
More details
Hide details
Department of Invertebrate Zoology and Hydrobiology, Faculty of Biology and Environmental Protection, University of Łódź
X-ray Microtomography Lab, Department of Biomedical Computer Systems, University of Silesia
Submission date: 2018-07-31
Final revision date: 2018-08-28
Acceptance date: 2018-09-20
Publication date: 2018-09-29
Corresponding author
Anna Sulikowska-Drozd   

Department of Invertebrate Zoology and Hydrobiology, Faculty of Biology and Environmental Protection, University of Łódź, Łódź, Poland
Folia Malacol. 2018;26(3):149-153
We adopted X-ray microtomography images and the specially designed algorithm that mimics the movement of spherical object in the shell channel to compare apertural barriers of two closely related clausiliid species with well documented reproductive strategies. For oviparous Laciniaria plicata, the patency of the shell channel was 0.60 mm (SD 0.09) at the ultimate whorl; 18.0% in relation to shell width. For viviparous Alinda biplicata, the patency of the shell channel was 1.24 mm (SD 0.06) at the ultimate whorl; 31.8% in relation to shell width. In the studied species, the patency of the shell channel differs significantly at the ultimate whorl, while at the penultimate whorl it is in both cases close to 43%. The technique applied in this study can be useful for analysing apertural patency in any gastropod species that develops a complex protective shell armature.
Maltz T. K., Sulikowska-Drozd A. 2008. Life cycles of clausiliids of Poland – knowns and unknowns. Annales Zoologici 58: 857–880.
Maltz T. K., Sulikowska-Drozd A. 2012. Life history of Alinda biplicata (Montagu, 1803) (Gastropoda: Pulmonata: Clausiliidae) based on five-year laboratory observations. Annales Zoologici 62: 789–807.
Moorsel C. H. M. von, Dijkstra E. G. M., Gittenberger E. 2000. Molecular evidence for repetitive parallel evolution of shell structure in Clausiliidae (Gastropoda, Pulmonata). Molecular Phylogenetics and Evolution 17: 200–208.
Nordsieck H. 2007. Worldwide door snails (Clausiliidae), recent and fossil. ConchBooks, Hackenheim.
Nordsieck H. 2008. Alinda biplicata (Montagu) and Laciniaria plicata (Draparnaud), diversity in comparison, with the description of new subspecies. (Gastropoda: Stylommatophora: Clausiliidae). Archiv für Molluskenkunde 137: 133–157.
Ruxton G. D. 2006. The unequal variance t-test is an underused alternative to Student’s test and the Mann-Whitney U test. Behavioral Ecology 17: 688–690.
Pokryszko B. M. 1997. Land snail apertural barriers – adaptation or hindrance? (Gastropoda: Pulmonata). Malakologische Abhandlungen des Staatlichen Museums für Tierkunde Dresden 18: 239–248.
Sulikowska-Drozd A., Walczak M., Binkowski M. 2014. Evolution of shell apertural barriers in viviparous land snails (Gastropoda: Pulmonata: Clausiliidae). Canadian Journal of Zoology 92: 205–213.
Walczak M., Binkowski M., Sulikowska-Drozd A., Wróbel Z. 2015. Maximum sphere method for shell patency measurements in viviparous land snails based on X-ray microcomputed tomography imaging. Computers in Biology and Medicine 64: 187–196.
Journals System - logo
Scroll to top