Results 131 to 140 of about 205,581 (146)

Ontogenetic Torsion and Protoconch Form in the Archaeogastropod Haliotis kamtschatkana: Evolutionary Implications

, 1997
Ontogenetic torsion in archaeogastropods has strongly influenced theories about early gastropod evolution, but the seminal studies by Crofts (1937, 1955) remain the major source of information about tissue movements during this developmental process ...
L. Page
semanticscholar   +1 more source

Torsion in Patella caerulea (Mollusca, Patellogastropoda): ontogenetic process, timing, and mechanisms

, 2005
. Torsion is a process in gastropod ontogenesis where the visceral body portion rotates 180° relative to the head/foot region. We investigated this process in the limpet Patella caerulea by using light microscopy of living larvae, as well as scanning ...
A. Wanninger, B. Ruthensteiner, G. Haszprunar   +2 more
semanticscholar   +1 more source

Intermediate Stages in the Embryonic Development of the Gastropod Ilyanassa obsoleta: a Scanning Electron Microscope Study

, 1987
Summary Scanning electron microscopy was used to study embryonic development of the mud snail, Ilyanassa obsoleta, from the fourth to the seventh day of development (70 to 165 hr post-trefoil at 20° C).
Sarah Tomlinson
semanticscholar   +1 more source

Development of asymmetry in the caenogastropods Amphissa columbiana and Euspira lewisii

, 2005
. The asymmetry displayed by the body plan of gastropods has been directly or indirectly attributed to an evolutionary process called torsion. Torsion is defined as a rotation of 180° between the cephalopodium (head and foot) and visceropallium (visceral
Carin A. Bondar, L. Page
semanticscholar   +1 more source

Torsion of Thin-Walled Structures

Torsion of Thin Walled Structures, 2022
K. Rajagopalan
semanticscholar   +1 more source

Stability Analysis of Thin-Walled Structures in Torsion

Torsion of Thin Walled Structures, 2022
K. Rajagopalan
semanticscholar   +1 more source

Theories of Torsion

Torsion of Thin Walled Structures, 2022
K. Rajagopalan
semanticscholar   +1 more source

St. Venant Torsion

Torsion of Thin Walled Structures, 2022
K. Rajagopalan
semanticscholar   +1 more source

Early differentiating neuron in larval abalone (Haliotis kamtschatkana) reveals the relationship between ontogenetic torsion and crossing of the pleurovisceral nerve cords

Evolution & Development, 2006
L. Page
semanticscholar   +1 more source

Studies on the ontogeny of Tritonia hombergi cuvier (gastropoda opisthobranchia)

Philosophical transactions of the Royal Society of London. Series B, Biological sciences, 1962
T. E. Thompson
semanticscholar   +1 more source