Archaeogastropoda


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Archaeogastropoda

[‚ärk·ē·ə‚gas′träp·ə·də]
(invertebrate zoology)
An order of gastropod mollusks that includes the most primitive snails.
References in periodicals archive ?
In present study, gastropods belonging toorder Archaeogastropoda, Caenogastropoda, Chitonida, Cycloneritimorpha, Littorinimorpha, Neogastropoda, Nudibranchia and Patellogastropodawere recorded.
In present study, gastropods belonging to order Archaeogastropoda, Caenogastropoda, Chitonida, Cycloneritimorpha, Littorinimorpha, Neogastropoda, Nudibranchia and Patellogastropoda were recorded.
La subclase Archaeogastropoda, el segundo grupo mas primitivo de los moluscos gasteropodos, aparecio por primera vez en el periodo Cambrico Inferior y dentro de ellos, el orden Mesogastropoda posee especies de gran tamano, sobre todo los que pertenecen a la familia Strombidae.
Archaeogastropoda (Aspidobranchia) from the Estuarine Region.
According to the work of Fretter and Graham (1962), Archaeogastropoda, which are one of the most primitive prosobranchs--such as Scissurellidae (Vetigastropoda), Neritidae (Neritimorpha).
The slit bearing nacreous Archaeogastropoda of the Triassic tropical reefs in the St Cassian Formation with evaluation of the taxonomic value of the selenizone.
In the order Archaeogastropoda, which includes the Turbinidae family, the haploid chromosome number varies widely from 9-21 (Nakamura 1986).
Gilinsky (1981) suggested a pattern similar to this after finding that Paleozoic gastropod genera classified in the Archaeogastropoda became increasingly confined to a moderately high-spired ("trochiform") region in morphospace.
testudinalis broadens the base of knowledge and provides new morphological characters for use in phylogenetic analysis of the Archaeogastropoda.