gracieteoliveira [licensed for non-commercial use only] / Classe Cephalopoda. Cuvier, G. Second Mémoire sur l’organisation et les rapports des animaux à sang blanc, dans lequel on traite de la structure des Mollusques et de leur. Mollusks are divided into seven classes with most species residing in gastropoda . The class Cephalopoda is a remarkable group of mollusks.

Author: Kagar Volrajas
Country: Puerto Rico
Language: English (Spanish)
Genre: Health and Food
Published (Last): 14 September 2018
Pages: 215
PDF File Size: 11.59 Mb
ePub File Size: 18.20 Mb
ISBN: 697-9-59911-494-7
Downloads: 56336
Price: Free* [*Free Regsitration Required]
Uploader: Dushicage

Classes and sub-classes of Phylum Mollusca

This providence is a method for testing monophylies Simone, a. Create lists, bibliographies and reviews: In both scaphopods and bivalves, the visceral sac protrudes into the pallial cavity, forming a bulged sac at the ventral base of the foot. Some points, however, are certainly broached in the discussion. This condition is not the case with bivalves and scaphopods.

Despite the fact that this character clazse divided into two apomorphic states that support Diasoma and Cyrtosoma respectively Fig. Write a review Rate this item: However, based on a different kind of protoconch, this possibility has been rejected Peel, Thinness of both longitudinal muscles equivalent to that of shell wall, gradually becoming slightly thicker anteriorly. Annales des sciences naturelles, t. Representationes Leger Modificar Modificar fonte Vider historia.

These papers also bring comprehensive history of the classification and evolution of both classes that are not reproduced here. Manual of Conchology From south Bahia, Brazil, to classf Argentina Pacific records contested, see below.


Types of Mollusks ( Read ) | Biology | CK Foundation

Mitteilungen der Dautschen Malakologischen Gesellschaft Journal of Zoological Systematics and Evolutionary Researchclaese Large transverse muscle Fig. Digital photos of all steps of the dissection were taken.

Pair of palps described above pallial cavity Fig. Science11 Cruciform-like musculature of integument in postero-ventral region of foot absent. In the case of bivalves, this bilobed condition persists from the larval phase to adulthood, and each lobe secretes each shell valve.

On the primitive significance of the byssus in the Bivalvia and its effect in evolution. Polyschides noronhensis new species Figs. Transactions of the Royal Society of South Australia62 2: The term “lamellibranch” sets the filibranchs and the eulamellibranchs and possibly the septibranchsi.

From Bivalvia, one or two samples of the main branches of basal taxa, i. Find a copy in the library Finding libraries that hold this item The lobed state is something like a horse saddle that mostly covers the dorsal and lateral regions of the animal’s body. More like this Similar Items.

The E-mail Address es field is required. The relationship of the Classes Clawse and Bivalvia has been fluid, and even their monophyly has been questioned in some nom-morphological approaches. The conic state is found in those classes that possess a shell practically restricted to the dorsal region of the body; the cone can be flattened, as in monoplacophores, or deep a bind-sac as in gastropods and cephalopods. Phylogenetic relationships among families of the Scaphopoda Mollusca.

For the other species, the description is comparative and more focused on distinctions, then called “distinctive description”. As explained in the previous character, the characteristic state of scaphopods is to have a cephaolpoda of the mantle lobes during metamorphosis. From the synapomorphies, the interesting ones are: This branch reunites bivalves except Solemyidae, and is supported by four synapomorphies. Comparative morphology and systematics of Brazilian Terebridae Mollusca, Gastropoda, Conoideawith descriptions of three new species.


Is the Aplacophora monophyletic? Family Dentaliidae Genus Coccodentalium Sacco, type: Morphological basis for the phylogeny and classification of Bivalvia. The infaunal mode of life is not the only explanation for this feature, as with several other digging molluscs, such as some aplacophorans and gastropods e.

Arbeiten des Zoologischen Instituts Wien6: The former optimization is shown in Fig. Early evolution of the Mollusca: Le texto es disponibile sub le licentia Creative Commons Attribution-ShareAlike ; additional conditiones pote esser in vigor. The homology between bivalve palps cepbalopoda the scaphopod captacula has been suggestively claasse in previous cepjalopoda analyses Steiner, as large labial appendages, as it is cephalopods corroborated Fig.

Sandy bottoms, about 6 m depth.


Your rating has been recorded. Ubatuba Projeto Integrado; R. Gills posterior end supported by pair of suspensory stalks Figs.

Mouth very small, located at central region between both palps, compressed between foot and anterior portion of visceral mass.