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Plagiostomi

Chondrichthyes - Plagiostomi

Taxonomy
Plagiostomi was named by Cuvier.

It was reranked as the order Plagiostomi by Owen (1859), Leidy (1873) and Gadow (1898); it was reranked as the subclass Plagiostomata by Hay (1902); it was reranked as the class Plagiostomi by Gunnell (1933); it was reranked as the subclass Plagiostomi by Rapp (1946).

It was assigned to Elasmobranchii by Gadow (1898); to Elasmobranchii by Leidy (1873) and Hay (1902); to Vertebrata by Owen (1859) and Gunnell (1933); and to Chrondroterygia by Rapp (1946).

Sister taxa
Raiae

Synonymy list
YearName and author
1859Plagiostomi Owen p. 116
1873Plagiostomi Leidy p. 351
1898Plagiostomi Gadow p. 5
1902Plagiostomata Hay p. 263
1933Plagiostomi Gunnell
1946Plagiostomi Rapp p. 510

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
RankNameAuthor
superclassGnathostomata
classChondrichthyes
subclassElasmobranchiiBonaparte 1838
orderPlagiostomi(Cuvier)
orderPlagiostomi(Cuvier)

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.

Or. †Plagiostomi Cuvier
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G. †Rhaibodus Bohm 1926
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Rhaibodus rapax Bohm 1926
G. †Narcopterus Agassiz 1835
Invalid names: Eulamiidae [empty], Hexeptranchidae [empty], Raiae [empty]
Diagnosis
ReferenceDiagnosis
R. Owen 1859Endo-skeleton cartilaginous or partially ossified; exo-skeleton placoid; gills fixed with five or more gill-apertures; no swim-bladder; scapular arch detached from the head; ventrals abdominal; intestine with spiral
valve.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: marinesubp
Locomotion: actively mobilec
Life habit: nektonicc
Diet: carnivorec
Created: 2004-08-17 13:49:23
Modified: 2009-12-13 03:31:01
Source: c = class, subp = subphylum
References: Wagner 2023, Carroll 1988

Age range

Maximum range based only on fossils: base of the Priabonian to the top of the Late/Upper Pliocene or 38.00000 to 2.58800 Ma
Minimum age of oldest fossil (stem group age): 33.9 Ma

Collections (2 total)


Time interval Ma Country or state Original ID and collection number
Priabonian38.0 - 33.9Namibia (Sperrgebiet) Rhaibodus rapax (149316)
Late/Upper Pliocene3.6 - 2.588Morocco Plagiostomi indet. (32052)