ESPICULAS DE ESPONJAS PDF

ESPICULAS DE ESPONJAS PDF

O Paleolago Cemitério, Catalão, Goiás, é um depósito lacustre rico em espículas de esponjas continentais. Essas espículas, que estão presentes em três. This Pin was discovered by Joelma Martins Fonseca. Discover (and save!) your own Pins on Pinterest. A sustentação das células das esponjas é feita por lamentos calcários chamados de espículas. Nas esponjas também não há sistemas responsáveis pelas.

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Trans Am Microsc Soc 2: Corvospongilla seckti Bonetto and Ezcurra de Drago Spongilla navicella Carter Rev Bras Paleontol 10 1: Corvoheteromeyenia australis Bonetto and Ezcurra de Drago Figs.

The gemmules, which are the asexual reproduction structures, have been crucial in the occupation of continental environments and ensure the survival of the species in seasonal habitats, being also important structures for the dispersion of the animals within aquatic microenvironments Volkmer-Ribeiro In addition, we interpret a strong lotic influence at the beginning of the paleolake’s history, as indicated by the species C.

Eunapius fragilis Leidy Fig.

History and classification of the know species of Spongilla. The authors concluded that, during this time period, the weather conditions were probably on average better for the development of forests, but these developments were regularly interrupted by fire since the presence of C.

They espiculqs concluded that the sequence of spicules observed in both profiles indicated a global climate change, with stages of retraction and expansion of forests during the last espnjas, years, which is supported by pollen and geochemical analysis.

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Spongofacies with spicules of M. This interpretation is supported by the stratigraphy at Section 1 whose the basal section is dominated by coarse particle sizes suggesting deposition in a strong uni-directional flow. Roberto Iannuzzi espicjlas Dr. Rev Bras Paleontol 12 2: Rev Bras Paleontol 9 3: Eunapius fragilis Penney and Racek When the drainage is reduced and the production of the sponge is voluminous, the accumulation of these spicules in sediments can produce biosiliceous mineral deposits known as spongillites Volkmer-RibeiroVolkmer-Ribeiro and Motta Springer-Verlag, Tokyo, Japan, p.

Rev Bras Zool 20 2: The waters of Merom: The results presented herein correspond to an unpublished component of the Master’s thesis of the senior author. Proc Acad Nat Sci Phila 5: The presence of spicules in different rocks was visually evaluated and qualified by OM permanent slides and in the rock fragments Stereoscopic Microscope – magnifying glass as: Spongillidae from a esoiculas core of a Colorado semidrainage mountain lake.

On Metania spinata Carter, and Metania kiliani n.

Corvomeyenia australis Bonetto and Ezcurra de Drago The specific identification of continental sponges is based on the set of spicules of each species.

Few spicules of E. The ages obtained by N.

Inventary of the Sponge Fauna of the cemitério Paleolake, Catalão, Goiás, Brazil

Spongillidae from Western Canada: Few spicules, differing from that of Layer 1 by the absence of E. New fresh-water sponges from Es;iculas waters. Spongofacies with spicules of D. Few spicules of M. The accumulation espoonjas humic substances, which resulted from a natural process of eutrophication caused by the production of macrophyte vegetation in the basin, would contribute to the accelaration of an erosive karstic process that leads to subsidence at the bottom of lakes.

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How to cite this article.

Volkmer-Ribeiro and Motta Sociedade Brasileira de Zoologia, n. Services on Demand Journal. Continental espiculzs Phylum Porifera are animals that can be found in any, permanent or temporary, body of fresh water under natural conditions, e.

Espícula (esponja)

Three slides were prepared for each horizon subsample. Samples were collected from the three sites from top to esponias, with 21, 19 and 13 collected layers at Sites 1, 2 and 3, respectively Figs. Tubella spinata Carter The conditions of lotic environments may have contributed to espojas volumes of water and, consequently, to increased physical and chemical weathering at the bottom of the lake, which is typical of karstic lakes.

Trochospongilla variabilis Bonetto and Ezcurra de Drago Oncosclera navicella Carter Fig. Radiospongilla amazonensis Volkmer-Ribeiro and Maciel Figs.