Xenacanthus decheni (29)
(GOLDFUSS, 1847)
Synonyms: Orthacanthus dechenii, Pleuracanthus decheni
Original description species: (GOLDFUSS, 1847)
Genus: Xenacanthus BEYRICH, 1848
Family: Xenacanthidae FRITSCH, 1889
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii
Xenacanthus elegans (4)
(TRAQUAIR, 1881)
Synonyms: Pleuracanthus elegans
Original description species: (TRAQUAIR, 1881)
Genus: Xenacanthus BEYRICH, 1848
Family: Xenacanthidae FRITSCH, 1889
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii
Xenacanthus gaudryi (2)
(BRONGNIART & SAUVAGE, 1888)
Synonyms: Pleuracanthus gaudryi
Original description species: (BRONGNIART & SAUVAGE, 1888)
Genus: Xenacanthus BEYRICH, 1848
Family: Xenacanthidae FRITSCH, 1889
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii
Xenacanthus humbergensis (5)
HAMPE, 1994
Original description species: HAMPE, 1994
Genus: Xenacanthus BEYRICH, 1848
Family: Xenacanthidae FRITSCH, 1889
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii
Xenacanthus laevissimus (9)
(AGASSIZ, 1837)
Synonyms: Pleuracanthus laevissimus
Original description species: (AGASSIZ, 1837)
Genus: Xenacanthus BEYRICH, 1848
Family: Xenacanthidae FRITSCH, 1889
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii
Xenacanthus latus (5)
(NEWBERRY & WORTHEN, 1866)
Synonyms: Diplodus latus, Orthacanthus cf. latus
Original description species: (NEWBERRY & WORTHEN, 1866)
Genus: Xenacanthus BEYRICH, 1848
Family: Xenacanthidae FRITSCH, 1889
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii
Xenacanthus meisenheimensis (10)
HAMPE, 1994
Original description species: HAMPE, 1994
Genus: Xenacanthus BEYRICH, 1848
Family: Xenacanthidae FRITSCH, 1889
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii
Xenacanthus oelbergensis (2)
(FRITSCH, 1890)
Original description species: (FRITSCH, 1890)
Genus: Xenacanthus BEYRICH, 1848
Family: Xenacanthidae FRITSCH, 1889
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii
Xenacanthus ossiani (2)
JOHNSON, 1999
Synonyms: Xenacanthus cf. ossiani
Original description species: JOHNSON, 1999
Genus: Xenacanthus BEYRICH, 1848
Family: Xenacanthidae FRITSCH, 1889
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii
Xenacanthus ovalis (8)
(FRITSCH, 1890)
Synonyms: Pleuracanthus ovalis
Original description species: (FRITSCH, 1890)
Genus: Xenacanthus BEYRICH, 1848
Family: Xenacanthidae FRITSCH, 1889
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii
Xenacanthus parallelus (12)
(FRITSCH, 1890)
Synonyms: Pleuracanthus parallelus, Xenacanthus paralellus
Original description species: (FRITSCH, 1890)
Genus: Xenacanthus BEYRICH, 1848
Family: Xenacanthidae FRITSCH, 1889
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii
Xenacanthus ragonhai (1)
PAULIV, DIAS, SEDOR & RIBEIRO, 2014
Original description species: PAULIV, DIAS, SEDOR & RIBEIRO, 2014
Genus: Xenacanthus BEYRICH, 1848
Family: Xenacanthidae FRITSCH, 1889
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii
Xenacanthus remigiusbergensis (6)
HAMPE, 1994
Original description species: HAMPE, 1994
Genus: Xenacanthus BEYRICH, 1848
Family: Xenacanthidae FRITSCH, 1889
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii
Xenacanthus slaughteri (2)
JOHNSON, 1999
Original description species: JOHNSON, 1999
Genus: Xenacanthus BEYRICH, 1848
Family: Xenacanthidae FRITSCH, 1889
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii
Xenacanthus tenuis (3)
(WOODWARD, 1889)
Synonyms: Diplodus tenuis
Original description species: (WOODWARD, 1889)
Genus: Xenacanthus BEYRICH, 1848
Family: Xenacanthidae FRITSCH, 1889
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii
Xenacanthus tocantinsensis (1)
SANTOS & SALGADO, 1970
Original description species: SANTOS & SALGADO, 1970
Genus: Xenacanthus BEYRICH, 1848
Family: Xenacanthidae FRITSCH, 1889
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii
Xenosynechodus egloni (5)
GLIKMAN, 1980
Original description species: GLIKMAN, 1980
Genus: Xenosynechodus GLIKMAN, 1980
Family: Xenosynechodontidae GLICKMAN, 1980
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii
Xinjiangichthys pluridentatus (2)
WANG, ZHANG, WANG & ZHU, 1998
Original description species: WANG, ZHANG, WANG & ZHU, 1998
Genus: Xinjiangichthys WANG, ZHANG, WANG & ZHU, 1998
Family: Shiqianolepidae SANSOM, ALDRIDGE & SMITH, 2000
Suborder: KARATAJUTE-TALIMAA, NOVITSKAYA, ROZMAN & SODOV, 1990
Order: Mongolepidida
Xinjiangichthys tarimensis (1)
WANG, ZHANG, WANG & ZHU, 1998
Original description species: WANG, ZHANG, WANG & ZHU, 1998
Genus: Xinjiangichthys WANG, ZHANG, WANG & ZHU, 1998
Family: Shiqianolepidae SANSOM, ALDRIDGE & SMITH, 2000
Suborder: KARATAJUTE-TALIMAA, NOVITSKAYA, ROZMAN & SODOV, 1990
Order: Mongolepidida
Xiphodolamia ensis (16)
LEIDY, 1877
Synonyms: Xyphodolamia ensis
Original description species: LEIDY, 1877
Genus: Xiphodolamia LEIDY, 1877
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Xiphodolamia eocaena (26)
(WOODWARD, 1889)
Synonyms: Carcharias (Scoliodon) eocaenus, Isurus eocaenus, Oxyrhina eocaena, Oxyrhina zignoi, Rhizoprionodon eocaenus, Xenodolamia eocaena, Xiphodolamia eocenica, Xiphodolamia zignoi
Original description species: (WOODWARD, 1889)
Genus: Xiphodolamia LEIDY, 1877
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Xiphodolamia serrata (3)
ADNET & HOSSEINZADEH & ANTUNES & BALBINO & KOZLOV & CAPPETTA, 2009
Original description species: ADNET & HOSSEINZADEH & ANTUNES & BALBINO & KOZLOV & CAPPETTA, 2009
Genus: Xiphodolamia LEIDY, 1877
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Xystracanthus arcuatus (1)
LEIDY, 1859
Original description species: LEIDY, 1859
Genus: Xystracanthus LEIDY, 1859
Subclass: Elasmobranchii
Xystrogaleus cappettai (3)
ADNET, 2006
Original description species: ADNET, 2006
Genus: Xystrogaleus ADNET, 2006
Family: Triakidae GRAY, 1851
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii