Skeletal mount of Hypacrosaurus altispinus, copyright Roland Tanglao.

Belongs within: Hadrosauroidea.
Contains: Hadrosaurinae.

The Hadrosauridae are a group of large herbivorous dinosaurs known from the Late Cretaceous of Eurasia and North and South America, recognised by Horner et al. (2004) as the least inclusive clade containing Telmatosaurus and Parasaurolophus. Most hadrosaurids can be divided between the sublineages Hadrosaurinae and Lambeosaurinae; members of the latter group often possessed large crests formed from posterior expansions of the nasal bones.

Characters (from Horner et al. 2004): Three or more replacement teeth present per tooth family; dentary tooth row extending distally to terminate caudal to apex of coronoid process, caudalmost termination of dentary well behind coronoid process; surangular foramen absent; ectopterygoid and jugal not in contact; supraorbital absent or fused to orbit rim; neural arches with cervical zygapophyseal peduncles elevated to extend well above level of neural canal; postzygapophyses long, dorsally arched; coracoid bearing long cranioventral process extending well below glenoid; proximal scapula dorsoventrally narrow, with acromion process projecting horizontally, notched cranioventral corner, reduced area for coracoid articulation; femur bearing deep intercondylar extensor groove, with edges meeting or nearly meeting cranially to enclose extensor tunnel.

<==Hadrosauridae [Trachodontidae]
    |--Telmatosaurus Nopcsa 1903 [incl. Hecatasaurus Brown 1910, Limnosaurus Nopcsa 1900]HWF04
    |    |--T. cantabrigiensisD07
    |    `--T. transsylvanicus Nopcsa 1900HWF04 [=Limnosaurus transsylvanicusHWF04, Orthomerus transsylvanicusPST99]
              |  i. s.: Pararhabdodon isonesisWJ03
              |         Barsboldia Maryańska & Osmólska 1981HWF04
              |           `--B. sicinskii Maryańska & Osmólska 1981HWF04 [=Hypacrosaurus sicinskiiP10]
              |         Nipponosaurus Nagao 1936HWF04
              |           `--N. sachalinensis Nagao 1936HWF04 [=Hypacrosaurus sachaliensisP10]
              |         Bactrosaurus Gilmore 1933D07
              |           |--B. johnsoni Gilmore 1933HWF04
              |           |--B. kyzylkumensisD07
              |           `--B. prynadai Riabinin 1939 (n. d.)HWF04
              |         Nanningosaurus dashiensisP10
              |         Sahaliyania elunchunorumP10
              |         Arenysaurus ardevoliP10
              |         Angulomastacator daviesiP10
              |--Tsintaosaurus Young 1958HWF04
              |    `--T. spinorhinus Young 1958 [incl. Tanius laiyangensis Zhen 1976]HWF04
              `--+--Jaxartosaurus Riabinin 1939GBA03, HWF04
                 |    |--J. aralensis Riabinin 1939 [incl. Procheneosaurus convincens Rozhdestvensky 1968]HWF04
                 |    `--J. fuyunensis Wu 1984 (n. d.)HWF04
                 `--+--Amurosaurus Bolotsky & Kurzanov 1991GBA03, HWF04
                    |    `--A. riabinini Bolotsky & Kurzanov 1991HWF04
                    `--+--+--Charonosaurus Godefroit, Zan & Jin 2000GBA03, HWF04
                       |  |    `--C. jiayinensis Godefroit, Zan & Jin 2000HWF04 [=Parasaurolophus jiayinensisP10]
                       |  `--Parasaurolophus Parks 1922GBA03, HWF04
                       |       |--P. cyrtocristatus Ostrom 1961HWF04
                       |       |--P. tubicen Wiman 1931HWF04
                       |       `--P. walkeri Parks 1922HWF04
                       `--+--Lambeosaurus Parks 1923GBA03, HWF04 [incl. Didanodon Osborn 1902HWF04]
                          |    |--L. lambei Parks 1923HWF04 (see below for synonymy)
                          |    |--L. laticaudus Morris 1981HWF04
                          |    `--L. magnicristatus Sternberg 1935HWF04 [=Hypacrosaurus magnicristatusP10]
                          `--+--Olorotitan Godefroit, Boltsky & Alifanov 2003GBA03
                             |    `--*O. arharensis Godefroit, Bolotsky & Alifanov 2003GBA03
                             |--Corythosaurus Brown 1914GBA03, HWF04 [incl. Procheneosaurus Matthew 1920HWF04]
                             |    |--C. casuarius Brown 1914HWF04 (see below for synonymy)
                             |    `--C. convincensV-RR93
                             `--Hypacrosaurus Brown 1913GBA03, HWF04
                                  |--H. altispinus Brown 1913 [incl. Cheneosaurus tolmanensis Lambe 1917]HWF04
                                  |--H. coahuilensis [=Velafrons coahuilensis]P10
                                  |--H. laticaudusP10
                                  `--H. stebingeri Horner & Currie 1994HWF04
Hadrosauridae incertae sedis:
  Gilmoreosaurus Brett-Surman 1979HWF04
    |--G. arkhangelskyiD07
    |--G. atavusD07
    `--G. mongoliensis (Gilmore 1933) [=Mandschurosaurus mongoliensis]HWF04
  Tanius Wiman 1929HWF04
    `--T. sinensis Wiman 1929 [incl. T. chingkankouensis Young 1958]HWF04
  Claosaurus Marsh 1890 [Claosauridae]HWF04
    |--C. affinis Wieland 1903 (n. d.)HWF04
    `--C. agilis (Marsh 1872) [=Hadrosaurus agilis]HWF04
  Secernosaurus Brett-Surman 1979HWF04
    `--S. koerneri Brett-Surman 1979HWF04
    |--C. arctatus Cope 1874 (n. d.)HWF04
    |--C. kysylkumensis Riabinin 1931 (n. d.)HWF04
    `--C. stenopsis Cope 1875 (n. d.)HWF04
  Claorhynchus trihedrus Cope 1892 (n. d.)HWF04
    |--D. calamarius Cope 1876 (n. d.)HWF04
    |--D. pentagonus Cope 1876 (n. d.)HWF04
    `--D. perangulatus Cope 1876 (n. d.)HWF04
  Hypsibema crassicauda Cope 1869 (n. d.)HWF04
  ‘Iguanodon’ hilli Newton 1892 (n. d.)HWF04
  Mandschurosaurus Riabinin 1930 (n. d.)HWF04
    |--M. amurensis (Riabinin 1925) [=Trachodon amurensis]HWF04
    `--M. laosensis Hoffet 1943 (n. d.)HWF04
  Microhadrosaurus nanshiungensis Dong 1979 (n. d.)HWF04
    |--O. dolloi Seeley 1883 (n. d.)HWF04
    `--O. weberi Riabinin 1945 (n. d.)HWF04
  Parrosaurus Gilmore 1945 (n. d.)HWF04
    `--*P. missouriensis (Gilmore & Stewart 1945) [=Neosaurus missouriensis]HWF04
  Pteropelyx grallipes Cope 1889 (n. d.)HWF04
  Thespesius occidentalis Leidy 1856 (n. d.)HWF04
    |--T. altidens Lambe 1902 (n. d.)HWF04
    |--T. brevicepsM96
    |--T. cantabrigiensis Lydekker 1888 (n. d.)HWF04
    |--T. marginatus Lambe 1902 (n. d.)HWF04
    |--T. mirabilis Leidy 1856 (n. d.)HWF04
    `--T. selwyni Lambe 1902 (n. d.)HWF04

Corythosaurus casuarius Brown 1914HWF04 [=Hypacrosaurus casuariusP10; incl. C. bicristatus Parks 1935HWF04, C. brevicristatus Parks 1935HWF04, Tetragonosaurus cranibrevis Sternberg 1935HWF04, Procheneosaurus cranibrevisD75, T. erectofrons Parks 1931HWF04, P. erectofronsD75, Corythosaurus excavatus Gilmore 1923HWF04, C. intermedius Parks 1923HWF04, Hypacrosaurus intermediusP10]

Lambeosaurus lambei Parks 1923HWF04 [=Hypacrosaurus lambeiP10; incl. L. clavinitialis Sternberg 1935HWF04, H. clavinitialisP10, Corythosaurus frontalis Parks 1935HWF04, Tetragonosaurus praeceps Parks 1931HWF04, Procheneosaurus praecepsD75]

*Type species of generic name indicated


[D07] Dixon, D. 2007. The Complete Illustrated Encyclopedia of Dinosaurs & Prehistoric Creatures. Hermes House: London.

[D75] Dodson, P. 1975. Taxonomic implications of relative growth in lambeosaurine hadrosaurs. Systematic Zoology 24 (1): 37–54.

[GBA03] Godefroit, P., Y. Bolotsky & V. Alifanov. 2003. A remarkable hollow-crested hadrosaur from Russia: an Asian origin for lambeosaurines. Comptes Rendus Palevol 2: 143–151.

[HWF04] Horner, J. R., D. B. Weishampel & C. A. Forster. 2004. Hadrosauridae. In: Weishampel, D. B., P. Dodson & H. Osmólska (eds) The Dinosauria 2nd ed. pp. 438–463. University of California Press: Berkeley.

[M96] Marsh, O. C. 1896. The Dinosaurs of North America: Washington.

[P10] Paul, G. S. 2010. Dinosaurs: A Field Guide. A & C Black.

[PST99] Pereda Suberbiola, X., & P. Taquet. 1999. Restes de Rhabdodon (dinosaure ornithopode) de Transylvanie donnés par Nopcsa au Muséum national d’Histoire naturelle de Paris. Geodiversitas 21 (2): 157–166.

[V-RR93] Vickers-Rich, P., & T. H. Rich. 1993. The ICI Australia Catalogue of the Great Russian Dinosaurs Exhibition 1993–1995. Monash University.

[WJ03] Weishampel, D. B., C.-M. Jianu, Z. Csiki & D. B. Norman. 2003. Osteology and phylogeny of Zalmoxes (n. g.), an unusual euornithopod dinosaur from the latest Cretaceous of Romania. Journal of Systematic Palaeontology 1: 65–123.

Leave a comment

Your email address will not be published. Required fields are marked *