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(greek: εὖ [eu], well + μετά [metá])
(after + ζῷον [zóon], animal)
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*”eumetazoa” is a ‘clade’ comprising all major animal groups except [‘sponges’ / ‘placozoa’ / ‘several other obscure or extinct life forms (such as ‘dickinsonia)’*
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(characteristics of “eumetazoans” include ‘true tissues’ organized into ‘germ layers’, the presence of ‘neurons’, and an ’embryo’ that goes through a ‘gastrula stage’)
(the clade is usually held to contain at least ‘Ctenophora’, ‘Cnidaria’, and ‘Bilateria’)
(whether ‘mesozoans’ belong is in dispute)
(‘ctenophora’ now appear ‘basal eumetazoa’, and ‘placozoa’ also appear to have emerged in ‘eumetazoa’)
(some ‘phylogenists’ have speculated the ‘sponges’ and ‘eumetazoans’ evolved separately from single-celled organisms, which would mean that the ‘animal kingdom’ does not form a ‘clade’ (a “complete grouping of all organisms descended from a common ancestor”))
(however, genetic studies and some morphological characteristics, like the common presence of ‘choanocytes’, support a ‘common origin’)
(‘eumetazoans’ are a major group of animals in the Five Kingdoms classification of ‘Lynn Margulis’ and ‘K. V. Schwartz’, comprising the ‘Radiata’ and ‘Bilateria’ — all ‘animals’ except the ‘sponges’, ‘placozoans’, and ‘mesozoans’)
(when treated as a formal taxon ‘Eumetazoa’ is typically ranked as a ‘subkingdom’)
(the name metazoa has also been used to refer to this group, but more often refers to the ‘animalia’ as a whole)
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(many classification schemes do not include a subkingdom ‘eumetazoa’)
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👈👈👈☜*“THE ANIMAL KINGDOM”* ☞ 👉👉👉
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💕💝💖💓🖤💙🖤💙🖤💙🖤❤️💚💛🧡❣️💞💔💘❣️🧡💛💚❤️🖤💜🖤💙🖤💙🖤💗💖💝💘
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*🌈✨ *TABLE OF CONTENTS* ✨🌷*
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🔥🔥🔥🔥🔥🔥*we won the war* 🔥🔥🔥🔥🔥🔥