Results 161 to 170 of about 4,700 (201)
Molecular Phylogenetics and Evolution, 2012 The current morphological classification of the Demospongiae G4 clade was tested using large subunit ribosomal RNA (LSU rRNA) sequences from 119 taxa. Fifty-three mitochondrial cytochrome oxidase 1 (CO1) barcoding sequences were also analysed to test whether the 28S phylogeny could be recovered using an independent gene.
Christine Maggs +2 more
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Structural studies on Demospongiae sponges from Gökçeada Island in the Northern Aegean Sea
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 2018 The Demospongiae is the largest Class in the phylum Porifera (sponges). Most sponge species in. the Class Demospongiae have a skeleton of siliceous spicules and/or protein spongin or both.
Bülent TOPALOĞLU +2 more
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Sterol composition and the classification of the demospongiae
Biochemical Systematics and Ecology, 1980Abstract The Demospongiae (Porifera) have yielded a wide range of novel and conventional sterols; a sample of 55 species screened and reported on have yielded 45 distinct sterol structures. The taxonomic relevance of the occurrence of particular sterols or overall sterol complement is evaluated and has proved to be informative in the case of the ...
Patricia R Bergquist
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Reproductive strategies of Mycalecontarenii (Porifera: Demospongiae)
Marine Biology, 1998The sexual and asexual phases of the reproductive cycle of the sponge Mycalecontarenii (Martens, 1824) were studied from samples collected over a period of 2 years (June 1994 to May 1996) in a Mediterranean coastal basin (Porto Cesareo, southwestern Apulia). The species is viviparous; year round it shows a discontinuous oocyte production. No males were
Corriero G. +3 more
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THE GENUS PLACOSPONGIA (DEMOSPONGIAE: CLIONAIDA) FROM THE COLOMBIAN CARIBBEAN
Zootaxa, 2023The genus Placospongia Gray, 1867 is a group of sponges widely distributed in the world. It currently has 11 valid species, where five of those, Placospongia caribica Rützler et al., 2014, P. cristata Boury-Esnault, 1973, P. intermedia Sollas, 1888, P. ruetzleri van Soest, 2017 and P. giseleae Mácola & Menegola, 2021, are distributed in the Central
JESÚS DAVID-COLÓN +2 more
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Notes for a Short Course: Studies in Geology, 1983
Demospongia have persisted as a major class of sponges since inception of the record of the phylum in the Cambrian. The class includes about 95% of all sponges in modern seas and all of the known freshwater forms, as well. These sponges occupy environments that range from warm, shallow subtidal, high energy to quiet, cold oceanic deeps.
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Demospongia have persisted as a major class of sponges since inception of the record of the phylum in the Cambrian. The class includes about 95% of all sponges in modern seas and all of the known freshwater forms, as well. These sponges occupy environments that range from warm, shallow subtidal, high energy to quiet, cold oceanic deeps.
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Molecular Phylogenetics and Evolution, 2021
The sponge class Demospongiae is the most speciose and morphologically diverse in the phylum Porifera, and the species within it are vital components of a range of ecosystems worldwide. Despite their ubiquity, a number of recalcitrant problems still remain to be solved regarding their phylogenetic inter-relationships, the timing of their appearance ...
Plese, Bruna +7 more
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The sponge class Demospongiae is the most speciose and morphologically diverse in the phylum Porifera, and the species within it are vital components of a range of ecosystems worldwide. Despite their ubiquity, a number of recalcitrant problems still remain to be solved regarding their phylogenetic inter-relationships, the timing of their appearance ...
Plese, Bruna +7 more
openaire +4 more sources
Sponges of the family Axinellidae (Porifera: Demospongiae) in Indonesia
Zootaxa, 2016Nine species in five genera of the family Axinellidae, including three new species, Axinella badungensis sp. nov., A. balinensis sp. nov. and Phycopsis pesgalli sp. nov. are recorded from Indonesian waters within the limits of the Western Coral Triangle province. Descriptions and discussion of those species are presented here.
Alvarez, Belinda +2 more
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The aquiferous systems of three marine demospongiae
Journal of Morphology, 1975AbstractThe aquiferous systems of three common, coastal, marine Demospongiae, Halichondria panicea (Pallas), Haliclona permollis (Bowerbank) and Microciona Prolifera (Ellis and Solander), are analyzed by measurements of cross‐sectional areas of conducting elements. The patterns in demosponges of extremely different organizational morphologies are found
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