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Query: keyword: "Mollusca"

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51   Article: I made use of the known dates of reclamation (and of afforestations) in the IJsselmeerpolders in The Netherlands to assess evolutionary adaptation in Cepaea nemoralis. At 12 localities (three in each polder), I sampled a total of 4390 adult individuals in paired open and shaded habitats, on average 233m apart, and scored these for genetic shell colour polymorphisms. The results show (highly) significant differentiation at most localities, although the genes involved differed per locality. Overall, though, populations in shaded habitats had evolved towards darker shells than those in adjacent open habitats, whereas a 'Cain & Sheppard' diagram (proportion yellow shells plotted against ‘effectively unbanded’ shells) failed to reveal a clear pattern. This might suggest that thermal selection is more important than visual selection in generating this pattern. Trait differentiation, regardless of whether they were plotted against polder age or habitat age, showed a linear increase of differentiation with time, corresponding to a mean rate of trait evolution of 15–31 kilodarwin. In conclusion, C. nemoralis is capable of rapid and considerable evolutionary differentiation over 1–25 snail generations, though equilibrium may be reached only at longer time scales
M. Schilthuizen, in: Heredity, Vol. 110 (2013), p. 247-252
52   Article: Holoplanktonic Mollusca (Gastropoda: Pterotracheoidea, Janthinoidea, Thecosomata and Gymnosomata) from the Pliocene of Pangasinan (Luzon, Philippines)
A.W. Janssen, in: Scripta Geologica, Vol. 135 (2007), p. 29-178
53   Article: Heliconoides linneensis sp. nov., a new holoplanktonic gastropod (Mollusca, Thecosomata) from the Late Oligocene of the Aquitaine Basin (France, Landes)
A.W. Janssen, in: Zoologische Mededelingen, Vol. 82 (2008), p. 69-72
54   Article: Gymnodoris pattani, a new dorid nudibranch from Pattani Bay, Gulf of Thailand (Gastropoda, Nudibranchia)
C. Swennen, in: Bulletin Zoologisch Museum, Vol. 15 (1996), p. 41-47
55   Article: Gulella johannae spec. nov. (Gastropoda, Pulmonata, Streptaxidae), a new land snail from the Drakensberg range in Limpopo Province, South Africa, with notes on G. johannesburgensis (M. & P.)
A.C. van Bruggen, in: Zoologische Mededelingen, Vol. 80 (2006), p. 63-72
56   Article: Gastropod skeletal defences: land, freshwater, and sea compared
Geerat J. Vermeij, in: Vita Malacologica, Vol. 13 (2015), p. 1-25
57   Article: Flying high: on the airborne dispersal of aquatic organisms as illustrated by the distribution histories of the gastropod genera Tryonia and Planorbarius
F.P. Wesselingh, G.C. Cadée, W. Renema, in: Geologie en Mijnbouw, Vol. 78 (1999), p. 165-174
58   Article: Eine Neue, Unterirdisch Lebende Zonitiden-art (Gastropoda: Stylommatophora) aus Südwestanatolien, Türkei
W. Rähle, A. Riedel, in: Zoologische Mededelingen, Vol. 61 (1987), p. 203-207
59   Chapter: Een slakje in het grondwater
W. Kuijper, in: Passie voor kleine beestjes, 33,3 jaar Stichting EIS-Nederland (2008), p. 58-59
60   Article: Die Aciculidae (Mollusca: Gastropoda Prosobranchia)
H.D. Boeters, E. Gittenberger, P. Subai, in: Zoologische Verhandelingen, Vol. 252 (1989), p. 1-230