The PEDIGREE of
Phylum Hemichordata (Acorn worns and pterobranchs)

     (Pterobranchia was once considered a separate species)

 "Child(ren)":       Enteropneusta (acorn worms)   ;   Pterobranchia   ;   Planctosphaeroidea (single species)   ;   Graptolithina (extinct)   ;   100 extant species
________________________________________________________________________________________________________ 
/-- (NN), a Nucleated Cell   +====> [ 53]
/-- Domain of Eukaryotes
/  \-- Pre-Mitochondrion Bacteria   +====> [ 50]
/-- Superempire Unikonta
/-- Empire of Opisthokonts (Fungi & Animals)
/-- Superkingdom Holozoa
/-- Kingdom of Animals
/-- Subkingdom of Metazoa (Multicellular Animals)
/-- Superbranch Eumetazoa
/-- Superphylum Planulozoa
/-- Clade of Bilateria and Placozoa
/   | (skip this generation?)
/-- Branch Bilateria
/-- Infrakingdom (Grade) of Coelomates  (570 M BC)
/   | or: prob. Clade Nephrozoa
/-- Superphylum Deuterostomia (Chordates, Echinoderms, & kin)
/-- Clade Ambulacraria
/-- Clade Coelomopora
/  
- Phylum Hemichordata (Acorn worns and pterobranchs)
 

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FabPed Genealogy Vers. 83   ©   Jamie, 1997-2017