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Table 2 Embryological sources of mesoderm in spiraliansa,b.

From: A comprehensive fate map by intracellular injection of identified blastomeres in the marine polychaete Capitella teleta

  Species Ectomesoderm Endomesoderm Reference
Nemertean Cerebratulus 3a, 3b 4d [26]
Polyclad tubellarian Hoploplana 2b 4d [9, 24]
  Chaetopleura None 3D [8]
Mollusk Patella 3a, 3b 3D [25]
  Ilyanassa 2b, 2c, 3d,
3A, 3B, 3C
4d [28]
  Crepidula 2c, 3a, 3b 4d [10]
Annelid Helobdella 1a (a'), 1b (b'), 1c (c'), 1d (d'), 3a (a'''), 3c (c'''), 3d (dm')
4d (DM'')
None [27, 32]
  Platynereis 1A, 1B, 1C, 1D 4d [12]
  Capitella 2a?, 2c?, 3a, 3b?, 3c, 3d, 4d none This report
  1. aExamples included are taken from fate maps determined through use of intracellular lineage tracers injected into embryos at the 8-64 cell stage.
  2. bOnly blastomeres with confirmed mesoderm descendants are included.