PBDB Taxon

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Petromyzontida

Taxonomy

Petromyzontida is a class.

It was assigned to Petromyzontomorphi by Long (2011); and to Vertebrata by Van Der Laan (2019).

Subtaxa

Atelaspidiformes, Birkeniiformes, Cephalaspidida, Cephalaspidiformes (syn. Osteostraci), Galeaspidiformes, Gilpichthyidae, Pipisciidae, Pituriaspidiformes

Sister taxa

Atelaspidiformes, Birkeniiformes, Cephalaspidida, Cephalaspidiformes (syn. Osteostraci), Galeaspidiformes, Pituriaspidiformes

Synonyms

Monorhina was named as a class.

It was synonymized subjectively with Cyclostomata by Gadow (1898); it was synonymized subjectively with Cyclostomata by Jaekel (1911); it was synonymized subjectively with Cephalaspidomorphi by Long (2011), Nelson et al. (2016).
Cephalaspidomorphi was named by Moy-Thomas and Mile (1971).

It was synonymized subjectively with Petromyzontida by Van Der Laan (2019).

It was assigned to Chordata by Sepkoski (2002); and to Osteostracomorphii by Long (2011), Nelson et al. (2016).

Synonymy list

Year	Name and author
1971	Cephalaspidomorphi Moy-Thomas and Mile
2002	Cephalaspidomorphi Sepkoski
2011	Cephalaspidomorphi Long p. 241
2011	Petromyzontida Long p. 241
2016	Cephalaspidomorphi Nelson et al. p. 33
2019	Petromyzontida Van Der Laan p. 15

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia

Rank	Name	Author
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
class	Petromyzontida
class	Petromyzontida

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Cl. †Petromyzontida

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Fm. †Gilpichthyidae Halstead 1993

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G. †Gilpichthys Bardack and Richardson 1977

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†Gilpichthys greeni Bardack and Richardson 1977

Fm. †Pipisciidae Halstead 1993

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G. †Pipiscius Bardack and Richardson 1977

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†Pipiscius zangerli Bardack and Richardson 1977

Invalid names: Cephalaspidomorphi Moy-Thomas and Mile 1971 [synonym]

Diagnosis

No diagnoses are available