H

"Hadrosauravus" (N.N.) Lambert, 1990=Gryposaurus latidens
Hadrosaurus Leidy, 1858
    type species: H. foulkii Leidy, 1858
    other species: H. agilis Marsh, 1872=Claosaurus agilis
                          H. navajovius (Brown, 1910 (originally Kritosaurus))=Kritosaurus navajovius
                          H. notabilis (Lambe, 1914 (originally Gryposaurus))=Gryposaurus notabilis
                          H. occidentalis (N.D.) (Leidy, 1856 (originally Thespesius))=Thespesius occidentalis
                          H. tripos (N.D.) Cope, 1869=nondinosaurian (Pliocene whale)
                          "H." breviceps (N.D.) Marsh, 1889>Hadrosauridae incertae sedis
                          "H." cavatus (N.D.) Cope, 1871>Hadrosauridae incertae sedis
                          "H." minor (N.D.) Marsh, 1870>Hadrosauridae incertae sedis
                          "H." paucidens (N.D.) Marsh, 1889>Lambeosaurinae incertae sedis
Hagryphus Zanno and Sampson, 2005
    type species: H. giganteus Zanno and Sampson, 2005
Halticosaurus (N.D.) Huene, 1907-08
    type species: H. longotarsus (N.D.) Huene, 1907-08
    other species: H. liliensterni Huene, 1934=Liliensternus liliensterni
                          H. orbitoangulatus Huene, 1932=sphenosuchian crocodylomorph
Hanssuesia Sullivan, 2003
    type species: H. sternbergi (Brown and Schlaikjer, 1943 (originally Troodon))
"Hanwulosaurus" (N.N.) Anonymous, 2001
Haplocanthosaurus Hatcher, 1903
    type species: H. priscus (Hatcher, 1903 (originally Haplocanthus))
    other species: H. delfsi McIntosh and Williams, 1988
                         H. utterbacki Hatcher, 1903=H. priscus
Haplocanthus Hatcher, 1903/Agassiz, 1833-44 [Haplacanthus, actually, but obviously close enough to cause problems, and the International Commission on Zoological Nomenclature decided to keep Hatcher's renaming when it was realized that the renaming was not needed, years after the fact] =Haplocanthosaurus
   "type species" "H." priscus Hatcher, 1903=Haplocanthosaurus priscus
Haplocheirus Choiniere, Xu X., Clark, J. M., Forster, Guo Y., and Han F., 2010
    type species: H. sollers Choiniere et al., 2010
Harpymimus Barsbold and Perle, 1984
    type species: H. okladnikovi Barsbold and Perle, 1984
Haya Makovicky, Kilbourne, Sadleir, and Norell, 2011
    type species: H. griva Makovicky et al., 2011
Hecatosaurus Brown, 1910=Telmatosaurus
   type species: H. transsylvanicus (Nopcsa, 1900 (originally Limnosaurus))=Telmatosaurus transsylvanicus
"Heilongjiangosaurus" (N.N.) Li and Jin, 2001=Charonosaurus
    "type species": "H. jiayinensis" (N.N.) Li and Jin, 2001=Charonosaurus jiayinensis
Heishansaurus (N.D.) Bohlin, 1953
    type species: H. pachycephalus (N.D.) Bohlin, 1953
Helioceratops Jin L., Chen J., Zan S., and Godefroit, 2009
    type species: H. brachygnathus Jin L. et al., 2009
Helopus Wiman, 1929\Wagler, 1832=Euhelopus
   "type species": "H." zdanskyi Wiman, 1929=Euhelopus zdanskyi
Heptasteornis (N.D.) Harrison and Walker, 1975
   type species: H. andrewsi (N.D.) Harrison and Walker, 1975
Herrerasaurus Reig, 1963
    type species: H. ischigualastensis Reig, 1963
Hesperonychus Longrich and Currie, 2009
    type species: H. elizabethae Longrich and Currie, 2009
Hespersaurus Carpenter, Miles, and Cloward, 2001
    type species: H. mjosi Carpenter et. al, 2001
Heterodontosaurus Crompton and Charig, 1962
    type species: H. tucki Crompton and Charig, 1962
Heterosaurus (?N.D.) Cornuel, 1850
   type species: H. neocomiensis (?N.D.) Cornuel, 1850
Hexinlusaurus Barrett, Butler, and Knoll
    type species: H. multidens (He and Cai, 1983 (originally Yandusaurus))
Heyuannia Lu, 2002
    type species: H. huangi, Lu, 2002
Hierosaurus (N.D.) Wieland, 1909
    type species: H. sternbergi (N.D.) Wieland, 1909
    other species: H. coleii Mehl, 1936=Niobrarasaurus coleii
Hikanodon (N.D. or N.O.) Keferstein, 1825 or 1834 (could just be a mistranslation for Iguanodon)
Hippodraco McDonald, Kirkland, DeBlieux, S. Madsen, Cavin, Milner, and Panzarin, 2010
    type species: H. scutodens McDonald et al., 2010
"Hironosaurus" (N.N.) Hisa, 1988=informally named LK Japanese hadrosaurid
"Hisanohamasaurus" (N.N.) Lambert, 1990
Histriasaurus (?N.D.) Dalla Vecchia, 1998
    type species: H. boscarollii (?N.D.) Dalla Vecchia, 1998
Homalocephale Maryanska and Osmólska, 1974
    type species: H. calathocercos Maryanska and Osmólska, 1974
"Honghesaurus" (N.N.) Anonyomous, 1981=Yandusaurus
Hongshanosaurus (N.D.) You, Xu, and Wang, 2003=Psittacosaurus
    type species: H. houi (N.D.) You et al., 2003=P. sp.
Hoplitosaurus Lucas, 1902
    type species: H. marshi (Lucas, 1901 (originally Stegosaurus))
Hoplosaurus (N.D.) Seeley, 1881=?Struthiosaurus
    type species: H. ischyrus (N.D.) Seeley, 1881=?Struthiosaurus transilvanicus
Hortalotarsus (N.D.) Seeley, 1894
   type species: H. skirtopodus (N.D.) Seeley, 1894
Huabeisaurus Pang and Cheng, 2000
   type species: H. allocotus Pang and Cheng, 2000
Huanghetitan You H., Li D., Zhou L., and Ji Q., 2006
    type species: H. liujiaxiensis You H. et al., 2006
    other species: H. ruyangensis Lu J., Xu L., Zhang X., Hu W., Wu Y., Jia S., and Ji Q., 2007
Huaxiagnathus Hwang, Norell, Ji Q., and Gao K., 2004
    type species: H. orientalis Hwang et al., 2004
"Huaxiasaurus" (N.N.)=Huaxiagnathus
Huaxiaosaurus Zhao X., Wang K., and Li D. J., 2011=?Shantungosaurus
    type species: H. aigahtens Zhao X. et al.., 2011=?Shantungosaurus giganteus
Huayangosaurus Dong, Tang, and Zhou, 1982
    type species: H. taibaii Dong et al., 1982
Hudiesaurus Dong, 1997
    type species: H. sinojapanorum Dong, 1997
Hulsanpes Osmólska, 1982
    type species: H. perlei Osmólska, 1982
Hungarosaurus Ősi, 2005
    type species: H. tormani Ősi, 2005
"Hunhosaurus" (N.N.) Dong, Zhou, and Zhang, 1983=Yandusaurus
Hylaeosaurus Mantell, 1833
    type species: H. armatus Mantell, 1833
    other species: H. northamptoni (?N.D.) (Mantell, 1848 (originally Regnosaurus))=Regnosaurus northamptoni
                         H. oweni Mantell, 1844=H. armatus
Hylosaurus Fitzinger, 1843=Hylaeosaurus
   type species: H. mantelli Fitzinger, 1843=Hylaeosaurus armatus
Hypacrosaurus Brown, 1913
    type species: H. altispinus Brown, 1913
    other species: H. stebingeri Horner and Currie, 1994
                         H. casuarius (Brown, 1914 (originally Corythosaurus))=Corythosaurus casuarius
                         H. lambei (Parks, 1923 (originally Lambeosaurus))=Lambeosaurus lambei
                         H. laticaudus (Morris, 1981 (originally Lambeosaurus))=Lambeosaurus laticaudus
                         H. magnicristatus (Sternberg, 1935 (originally Lambeosaurus))=Lambeosaurus magnicristatus
Hypselosaurus (N.D.) Matheron, 1869
    type species: H. priscus (N.D.) Matherton, 1869
Hypselospinus Norman, 2010
    type species: H. fittoni (Lydekker, 1889 (originally Iguanodon))
Hypsibema (N.D.) Cope, 1869
    type species: H. crassicauda (N.D.) Cope, 1869
    other species: H. missouriensis (N.D.) (Gilmore and Stewart, 1945 (originally Neosaurus))="Neosaurus" missouriensis
Hypsilophodon Huxley, 1869
    type species: H. foxii Huxley, 1869
    other species: "H." wielandi (N.D.) Galton and Jensen, 1979>Ornithopoda incertae sedis
Hypsirophus (N.D.) Cope, 1878
   type species: H. discursus (N.D.) Cope, 1878
   other species: "H. seeleyanus" (N.N.) Cope, 1879>Stegosauria incertae sedis, a Morrison stegosaurian possibly known from a femur and vertebrae