Bold ranks show taxa that will be shown in taxoboxes
because rank is principal or always_display=yes.

Ancestral taxa
Domain: Eukaryota /displayed  [Taxonomy; edit]
Clade: Amorphea  [Taxonomy; edit]
Clade: Obazoa  [Taxonomy; edit]
(unranked): Opisthokonta  [Taxonomy; edit]
(unranked): Holozoa  [Taxonomy; edit]
(unranked): Filozoa  [Taxonomy; edit]
Clade: Choanozoa  [Taxonomy; edit]
Kingdom: Animalia  [Taxonomy; edit]
Subkingdom: Eumetazoa  [Taxonomy; edit]
Clade: ParaHoxozoa  [Taxonomy; edit]
Clade: Bilateria  [Taxonomy; edit]
Clade: Nephrozoa  [Taxonomy; edit]
Superphylum: Deuterostomia  [Taxonomy; edit]
Phylum: Chordata  [Taxonomy; edit]
Clade: Olfactores  [Taxonomy; edit]
Subphylum: Vertebrata  [Taxonomy; edit]
Infraphylum: Gnathostomata  [Taxonomy; edit]
Clade: Eugnathostomata  [Taxonomy; edit]
Class: Chondrichthyes  [Taxonomy; edit]
Subclass: Euchondrocephali  [Taxonomy; edit]
Family: Gregoriidae  [Taxonomy; edit]


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Parent: Euchondrocephali [Taxonomy; edit]
Rank: familia (displays as Family)
Link: Gregoriidae
Extinct: yes
Always displayed: yes (major rank)
Taxonomic references: R. Lund and E. Grogan. 2004. Five new euchondrocephalan Chondrichthyes from the Bear Gulch Limestone (Serpukhovian, Namurian E2b) of Montana, USA. Recent Advances in the Origin and Early Radiation of Vertebrates 505-531
Parent's taxonomic references: Eileen D. Grogan & Richard Lund (2000). "Debeerius ellefseni (fam. nov., gen. nov., spec. nov.), an autodiastylic chondrichthyan from the Mississippian Bear Gulch Limestone of Montana (USA), the relationships of the chondrichthyes, and comments on gnathostome evolution". Journal of Morphology. 243 (3): 219–245. doi:10.1002/(SICI)1097-4687(200003)243:3<219::AID-JMOR1>3.0.CO;2-1. PMID 10681469.