Annelida

NOUN
  1. segmented worms: earthworms; lugworms; leeches
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How To Use Annelida In A Sentence

  • 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
  • Cell lineage analyses, mainly conducted on annelidan. and molluscan embryos, suggested that the ultimate fates of blastomeres are tremendously conserved.
  • 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.
  • 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
  • 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
  • One of the two vascular hemoglobins possesses a hexagonal-bilayer hemoglobin (HBL-Hb) quaternary structure, which is only found in the Annelida and Vestimentifera.
  • As a rule, annelidan segments are generated from a posterior growth zone, arising and developing sequentially, from anterior to posterior.
  • 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.
  • 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
  • At first glance, the animals in the annelidan and molluskan groups look like they have little in common.
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