Gastropod pallial siphons and siphonal canals

Siphons and siphonal canals evolved independently several times along the phylogeny of Gastropoda. They can be divided into three categories: 1) a canal lacking a corresponding pallial siphon in the mantle edge, as in some cerithioideans and stromboideans; 2) a canal with a corresponding pallial siphon, as seen in Siphonogastropoda; and 3) same, but almost entirely occluded inside a tubular canal, as seen in some tonnoideans and stenoglossan neogastropods. Siphons originating from the head-foot integument also exist, and can be found in some vetigastropods and basal caenogastropods (ampullarioideans and viviparoideans); in this case, they consist of a pair of structures (incurrent and excurrent) and have no corresponding canal. All this information is explored in a phylogenetic scenario. Other types of siphons are also discussed. DO

[Vous devez être inscrit et connecté pour voir ce lien]

Salut GG


Pb avec ton lien   

Pas de problème pour moi avec le lien mais je suis inscrit sur ResearchGate.
Inscrivez-vous c'est gratuit et c'est une grande plateforme de partage scientifique.

Le lien fonctionne maintenant   Merci