How To Use Annelida In A Sentence
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Having established this primary principle, Semper has little difficulty in showing that the main organs of the body lie to one another in the same relative positions in Annelida, Arthropoda, and Vertebrata; and this, together with the metameric segmentation common to them all, constitutes his first great argument in favour of their genetic relationship.
Form and Function A Contribution to the History of Animal Morphology
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Cell lineage analyses, mainly conducted on annelidan. and molluscan embryos, suggested that the ultimate fates of blastomeres are tremendously conserved.
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Both the frenulate pogonophoran clade and the vestimentiferan clade have been referred to as phyla, classes within the Annelida, classes within the Pogonophora, and subclasses within class Pogonophora within the Annelida.
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Geoffroy's principle of the unity of plan and composition to the three great metameric groups, the Annelida, Arthropoda, and Vertebrata.
Form and Function A Contribution to the History of Animal Morphology
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The main assumption was that the neural or blastoporal surface must be homologous throughout the Metazoa, though it was dorsal in the Chordata, ventral in the Annelida and Arthropoda.
Form and Function A Contribution to the History of Animal Morphology
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One of the two vascular hemoglobins possesses a hexagonal-bilayer hemoglobin (HBL-Hb) quaternary structure, which is only found in the Annelida and Vestimentifera.
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As a rule, annelidan segments are generated from a posterior growth zone, arising and developing sequentially, from anterior to posterior.
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One widely-mooted suggestion is that planktotrophic larvae, typified by the annelidan trochophore and echinoid pluteus, existed long before the metazoan radiations evident in the Cambrian fossil record.
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Of the phyla you haven't seen alive, I have seen: Chaetognatha, Nematomorpha, Nemertea, Sipuncula, Echiura which is really a subgroup of Annelida, Phoronida and Brachiopoda.
So many phyla so little time
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At first glance, the animals in the annelidan and molluskan groups look like they have little in common.
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Maybe five year olds, the ones troweling up dirt, practicing the long-forgotten art of making mud pies, daring each other to snort an earthworm for that Annelida high.
Archive 2010-03-01
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Megascolides australis phylum Annelida is truly a giant among terrestrial invertebrates; according to this document lengths of adults average under 1 m.
Archive 2006-01-01
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The main assumption was that the neural or blastoporal surface must be homologous throughout the Metazoa, though it was dorsal in the Chordata, ventral in the Annelida and Arthropoda.
Form and Function A Contribution to the History of Animal Morphology
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In fact, there are so many species of beetles that there are more species of beetles than the total number of species currently living in the Phyla Echinodermata, Mollusca, Annelida, Platyhelminthes, Cnidaria, and Porifera combined!
Species richness
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The high degree of diversity of the annelidan nervous system may seem to weaken the power of the ropeladder-like nervous system to act as an apomorphic characteristic for a taxon comprising Annelida and Arthropoda.
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Of the phyla you haven't seen alive, I have seen: Chaetognatha, Nematomorpha, Nemertea, Sipuncula, Echiura which is really a subgroup of Annelida, Phoronida and Brachiopoda.
So many phyla so little time
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At this time he considered _Balanoglossus_ -- by reason of its gill-slits (its notochord he did not know) -- to be the nearest living representative of the ancestral form of Vertebrates and Annelida.
Form and Function A Contribution to the History of Animal Morphology
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One widely-mooted suggestion is that planktotrophic larvae, typified by the annelidan trochophore and echinoid pluteus, existed long before the metazoan radiations evident in the Cambrian fossil record.
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The annelidan affinities of the Echiura are further strengthened by recent work demonstrating a metameric or segmented arrangement of their nervous system as is typical of the annelids.
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Arthropoda for 150 years were believed to originate from Annelida, but now they are derived from Nematoda.
On Thursday, the Legg report will be published along with...
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Vertebrates and yet show no particular annelidan affinities?
Form and Function A Contribution to the History of Animal Morphology
