NOMEN: Haemataria Haeckel 1874: 50 [E. Haeckel. Die Gastrea-Theorie, die phylogenetische Classification des Tierreichs und die Homologie der Keimblatter. – Jenaische Zeitschrift fur Naturwissenschaft, 1874, 8: 1-55]
ORIGINAL LISTED MEMBERSHIP (Haeckel 1874): Nemathelminthes + Bryozoa + Tunicata + Rhynchocoela + Gephyrea + Rotatoria + Annelida + Brachiopoda + Otocardia + Echinoderma + Arthropoda + Vertebrata
OBJECTIVE SYNONYM:
= Pentablasteria Haeckel
1874
JUNIOR
CIRCUMSCRIPTIONAL SYNONYMS:
= Coelomaria
Haeckel 1889
= Eubilateria Ax 1987
TYPIFIED NAME IN BASIC
FORMAT: Araneus/fg
(sine Fasciola, Medusa; incl. Gordius, Ascaris, Rotifer,
Lineus)
TYPIFIED
NAMES IN USE:
MODERN
STATUS: 
the valid, the oldest name for a taxon which is most probaly
holophyletic.
COMMENT. Originally (Haeckel 1874), the name "Haemataria" was connected with a statement that these animals primarily have a body cavity filled with liquid (either blood or coelomic liquid); the other name – "Pentablasteria" was connected with a statement that they primarily have 5 embryonic cell layers. Probably, the both characters are wrong, being not initial for this taxon. But holophyly of this taxon is supported by a real autapomorphy – initial presence of anus. The name Haemataria is the oldest one and, thus, should be valid, in spite of the fact that id does not reflect true character.