Results 81 to 90 of about 159 (101)

Developmental modularity and phenotypic novelty within a biphasic life cycle: morphogenesis of a cone snail venom gland. [PDF]

Proc Biol Sci, 2012
Page LR.
europepmc   +1 more source

At the limits of a successful body plan - 3D microanatomy, histology and evolution of Helminthope (Mollusca: Heterobranchia: Rhodopemorpha), the most worm-like gastropod. [PDF]

Front Zool, 2013
Brenzinger B, Haszprunar G, Schrödl M.
europepmc   +1 more source

Capitella teleta gets left out: possible evolutionary shift causes loss of left tissues rather than increased neural tissue from dominant-negative BMPR1. [PDF]

Neural Dev
Webster NB, Meyer NP.
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Evidence that gastropod torsion is driven by asymmetric cell proliferation activated by TGF-β signalling

Evidence that gastropod torsion is driven by asymmetric cell proliferation activated by TGF-β signalling
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THE ADAPTIVE SIGNIFICANCE OF GASTROPOD TORSION [PDF]

Evolution; International Journal of Organic Evolution, 1966
Unique among mollusks, the Gastropoda are characterized by a curious asymmetry, resulting from a rotation of the visceral hump and shell. Thus in the earlier stages of their embryonic development, gastropods have the same arrangement of parts as other mollusks, with the rudiments of the mantle cavity, gills, coelomic ducts, and associated structures at
Michael T Ghiselin
exaly   +6 more sources

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Gastropod ontogenetic torsion: Developmental remnants of an ancient evolutionary change in body plan

The Journal of Experimental Zoology, 2003
AbstractA dramatic morphogenetic movement (‘ontogenetic torsion’) during the development of gastropods has been proposed as a recapitulation of the original developmental departure that established the novel gastropod body plan. Nevertheless, speculative literature about ontogenetic torsion and its evolutionary significance has far outstripped ...
Louise R Page
exaly   +3 more sources

Larval Muscle Contraction Fails to Produce Torsion in a Trochoidean Gastropod

Biological Bulletin, 2001
The causes and effects of ontogenetic torsion in gastropods have been debated intensely for more than a century (1-19). Occurring rapidly and very early in development, torsion figures prominently in shaping both the larval and adult body plans. We show that mechanical explanations of the ontogenetic event that invoke contraction of larval retractor ...
Carole S Hickman, Michael G Hadfield
exaly   +3 more sources

Gastropod torsion: predation and the opercular imperative

Neues Jahrbuch Fur Geologie Und Palaontologie - Abhandlungen, 1982
exaly   +2 more sources

GARSTANG'S HYPOTHESIS AND GASTROPOD TORSION

Journal of Molluscan Studies, 1987
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Ontogenetic torsion in two basal gastropods occurs without shell attachments for larval retractor muscles

Evolution & Development, 2002
SUMMARY Results of this study on two species of vetigastropods contradict the long‐standing hypothesis, originally proposed by Garstang (1929), that the larval retractor muscles power the morphogenetic movement of ontogenetic torsion in all basal gastropods.
openaire   +2 more sources