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Chondrichthyes -

Holocephalomorpha was named by Lund (1986). It is not extant.

It was reranked as the infraclass Holocephalimorpha by Lund and Grogan (1997); it was misspelled as Holocephalimorpha by Lund and Grogan (2004), Goto and Okura (2004), Nelson (2006) and Long (2011).

It was assigned to Chondrichthyes by Lund and Grogan (1997) and Lund and Grogan (2004); and to Holocephali by Goto and Okura (2004), Nelson (2006) and Long (2011).

Synonymy list
YearName and author
1986Holocephalomorpha Lund
1997Holocephalimorpha Lund and Grogan
2004Holocephalomorpha Goto and Okura p. 221
2004Holocephalimorpha Lund and Grogan
2006Holocephalimorpha Nelson p. 44
2011Holocephalomorpha Long p. 242

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phylumChordataHaeckel 1847
subclassHolocephali(Bonaparte 1832)
superorderHolocephalomorphaLund 1986
superorderHolocephalomorphaLund 1986

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.

No diagnoses are available
No measurements are available
Composition: phosphaticsubp
Environment: marinesubp
Locomotion: actively mobileo
Life habit: nektobenthico
Diet: carnivoreo
Created: 2009-07-21 06:36:22
Modified: 2009-07-21 08:36:22
Source: o = order, subp = subphylum
References: Wagner 2017, Carroll 1988, Hendy et al. 2009

Age range

Maximum range based only on fossils: base of the Caradoc to the top of the Waipipian or 460.90000 to 3.00000 Ma
Minimum age of oldest fossil (stem group age): 449.5 Ma

Collections (254 total)

Oldest occurrences

Time interval Ma Country or state Original ID and collection number
Caradoc460.9 - 449.5USA (Colorado) Dictyorhabdus priscus (10380)
Givetian387.7 - 382.7France (Nord-Pas-de-Calais) Melanodus loonesi (90628)
Late/Upper Devonian382.7 - 358.9USA (California) Cochliodontiformes indet. (206454)
Kinderhookian360.7 - 353.8USA (Montana) Psammodus sp. (545)
Early/Lower Mississippian360.7 - 345.3USA (Iowa) Erismacanthus barbatus (133258)
Mississippian358.9 - 323.2USA (Iowa) Deltodus spatulatus (133270)
Mississippian358.9 - 323.2United Kingdom Cochliodus magnus (132784) Cochliodus magnus, Cochliodus striatus, Poecilodus jonesii, Psammodus cornutus (132783) Erismacanthus jonesi, Cochliodus contortus, Copodus cornutus, Copodus spatulatus, Copodus furcatus, Mesogomphus lingua, Pleurogomphus auriculatus, Psammodus trapeziformis, Psephodus magnus, Xystrodus striatus, Paecilodus jonesii, Paecilodus gibbosus, Streblodus oblongus, Streblodus colei, Deltoptychius acutus, Erismacanthus major (137333) Poecilodus foveolatus (132729) Poecilodus sublaevis, Psammodus rugosus, Cochliodus contortus, Cochliodus acutus, Cochliodus magnus, Cochliodus oblongus, Cochliodus striatus, Erismacanthus jonesii, Poecilodus jonesii, Poecilodus oliquus, Poecilodus parallelus, Psammodus canaliculatus, Psammodus cornutus (132781) Psammodus rugosus (132789) Psephodus salopiensis, Psephodus dubius, Sandalodus morrisii (137332)
Mississippian358.9 - 323.2USA (Alabama) Psammodus sp. (84103)
Osagean353.8 - 342.8USA (Indiana) Sandalodus sp. (6670)
Osagean353.8 - 342.8USA (Iowa) Deltodus spatulatus, Deltodus occidentalis (133094)
Visean346.7 - 330.9Russian Federation (Komi) Venustodus sp. (133366)
Visean346.7 - 330.9Egypt Psammodus sp., Psephodus sp. (46983)
Visean346.7 - 330.9Belgium Taeniodus contortus (133095)
Chadian345.3 - 345.0United Kingdom (England) Psephodus magnus (5970)
Arundian345.0 - 342.8United Kingdom (Scotland) Deltoptychius armigerus, Chondrenchelys problematica (90682)
Asbian339.4 - 336.0United Kingdom (Northern Ireland) Psammodus sp. (6949)
Asbian - Brigantian339.4 - 326.4United Kingdom (England) Psephodus magnus (5986)
Brigantian336.0 - 326.4Thailand Psammodontidae indet. (130649)
Arnsbergian326.4 - 318.1USA (Montana) Harpagofututor volsellorhinus (90681 116654 116655 116656 116657 116658 116659)
Late/Upper Mississippian326.4 - 318.1USA (Alabama) Psammodus sp. (84104)