CYLINDROCAPSA: CELL DIVISION AND PHYLOGENETIC AFFINITIES
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چکیده
منابع مشابه
The phylogenetic affinities of the extinct glyptodonts
Among the fossils of hitherto unknown mammals that Darwin collected in South America between 1832 and 1833 during the Beagle expedition were examples of the large, heavily armored herbivores later known as glyptodonts. Ever since, glyptodonts have fascinated evolutionary biologists because of their remarkable skeletal adaptations and seemingly isolated phylogenetic position even within their na...
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Cell division in Cylindrocapsa geminella, in particular the mode of septum membrane biogenesis, has been studied with the transmission electron microscope. Septum formation takes place in a narrow layer of cytoplasm separating post-mitotic nuclei. First, each daughter nucleus develops a wide cytoplasmic pocket (invagination) containing numerous strands of rough endoplasmic reticulum (ER). Next,...
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The chaetognaths, or arrowworms, constitute a small and enigmatic phylum of marine invertebrates whose phylogenetic affinities have long been uncertain. A popular hypothesis is that the chaetognaths are the sister group of the major deuterostome phyla: chordates, hemichordates, and echinoderms. Here we attempt to determine the affinities of the chaetognaths by using molecular sequence data. We ...
متن کاملMolecular phylogenetic affinities of the simakobu monkey (Simias concolor).
The simakobu (Simias concolor), or pig-tailed snubnosed langur, is one of four endemic primate species on the Mentawai Islands oV the west coast of Sumatra, Indonesia, and is currently considered a monotypic genus (BrandonJones et al., 2004; Miller, 1903). This species, like many other colobines, is a specialized folivore found in tropical rainforests. The simakobu monkey is a member of the “od...
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ژورنال
عنوان ژورنال: New Phytologist
سال: 1975
ISSN: 0028-646X,1469-8137
DOI: 10.1111/j.1469-8137.1975.tb02611.x