List of prehistoric mammals of Japan

This list is of prehistoric mammals known from the fossil record of the Japanese archipelago. For extant mammals from the area, see List of mammals of Japan (which includes the recently extinct species on the IUCN Red List[1] and its domestic counterpart the Ministry of the Environment Red List[2]). Other species that have gone extinct in historic times and extant species that have been locally extirpated and no longer form part of the fauna of Japan but are known from the fossil or subfossil record are additionally listed at the bottom of this page.

Mesozoic edit

Clade Order Family Genus Species Horizon Age
Trechnotheria †"Symmetrodonta" Spalacotheriidae Symmetrolestes S. parvus
Tsubamoto & Rougier, 2004[3]
Kitadani Formation Early Cretaceous
Theriimorpha Eutriconodonta Amphidontidae Hakusanodon H. archaeus
Rougier et al., 2007[4]
Kuwajima Formation
Allotheria Multituberculata Eobaataridae Hakusanobaatar H. matsuoi
Kusuhashi, 2008[5]
Tedoribaatar [it] T. reini
Kusuhashi, 2008[5]
Eutheria Asioryctitheria Sasayamamylos [ja] S. kawaii
Kusuhashi & Saegusa, 2013[6]
Sasayama Group
Zhelestidae Sorlestes S. mifunensis
Setoguchi et al., 1999[7]
Mifune Group Late Cretaceous

Cenozoic edit

Order Clade Family Genus Species Synonyms Image Age
Cimolesta Pantodonta Coryphodontidae Coryphodontidae sp.[8] EarlyMiddle Eocene
Asiocoryphodon [es] Asiocoryphodon sp.[8]
Tillodontia Esthonychidae [ru] Trogosus Trogosus cf. T. latidens[8]
Higotherium H. hypsodon
Miyata & Tomida, 1998[9]
Middle Eocene
Proboscidea Gomphotherioidea Gomphotheriidae Gomphotherium G. annectens [species] Hemimastodon annectens
Matsumoto, 1924[10]
  Early Miocene
Bunolophodon yokotii
Makiyama, 1938[11]
Sinomastodon S. sendaicus [it][12] Trilophodon sendaicus
Matsumoto, 1924[10]
Early Pliocene
Elephantoidea Stegodontidae Stegolophodon S. pseudolatidens[13] Eostegodon pseudolatidens
Yabe, 1950[14]
  Miocene
Stegolophodon tsudai
Shikama & Kirii, 1956[15]
Stegolophodon miyokoae
Hatai, 1959[16]
Stegodon S. miensis [ja] Stegodon clifti miensis
Matsumoto, 1941[17]
  Pliocene
Stegolophodon shinshuensis
Fossil Elephant Research Group, 1979[18]
Stegodon bombifrons
Itsukaichi Stegodon Research Group, 1980[19]
Stegodon cf. elephantoides[20]
S. protoaurorae [ja]
Aiba, Baba & Matsukawa, 2010[21]
Late PlioceneEarly Pleistocene
S. aurorae[20] Elephas aurorae
Matsumoto, 1918[22]
  Early Pleistocene
Parastegodon? kwantoensis
Tokunaga, 1934[23]
Parastegodon sugiyamai
Tokunaga, 1935[24]
Parastegodon akashiensis
Takai, 1936[25]
Parastegodon infrequens
Shikama, 1937[26]
Stegodon shodoensis (partim)[20]
S. orientalis[20][27] Stegodon orientalis shodoensis
Matsumoto, 1924[28]
  Middle Pleistocene
Elephantidae Palaeoloxodon P. naumanni[11][29]: 86  Elephas namadicus naumanni
Makiyama, 1924[30]
  MiddleLate Pleistocene
Loxodonta (Palaeoloxodon) tokunagai
Matsumoto, 1924[31]
Elephas indicus buski
Matsumoto, 1927[32]
Loxodonta (Palaeoloxodon) namadica yabei
Matsumoto, 1929[33]
Palaeoloxodon yokohamanus
Tokunaga, 1934[34]
Palaeoloxodon aomoriensis
Tokunaga & Takai, 1936[35]
Elephas (Palaeoloxodon) namadicus setoensis
Makiyama, 1929[36]
Mammuthus M. trogontherii[37]: 347 [38] Euelephas protomammonteus
Matsumoto, 1924[39]
  Early Pleistocene
Parelephas protomammonteus proximus
Matsumoto, 1926[40]
Parelephas protomammonteus typicus
Matsumoto, 1926[40]
Elephas primigenius matsumotoi
Dietrich, 1927[41]
Parelephas proximus uehataensis
Shikama, 1937[42]
Archidiskodon paramammonteus shigensis
Matsumoto & Ozaki, 1959[43]
M. primigenius[44]   Late Pleistocene
Sirenia Dugongidae Dusisiren D. dewana [species]
Takahashi, Domning & Saito, 1986[45]
Late Miocene
D. takasatensis [species]
Kobayashi, Horikawa & Miyazaki, 1995[46]
Hydrodamalis H. spissa
Furusawa, 1988[47]
Late Pliocene
Lagomorpha Ochotonidae Alloptox [es] A. japonicus
Tomida, 2012[48]
  Early Miocene
Rodentia Hystricomorpha Ctenodactyloidea sp.[8] EarlyMiddle Eocene
Diatomyidae Diatomys D. shantungensis[49][50] Early Miocene
Castorimorpha Castoridae Steneofiber Steneofiber sp.[49] Late Oligocene
Youngofiber Y. sinensis[51] Trogontherium sinensis
Young, 1955[52]
Early Miocene
Minocastor M. godai
Mörs, Tomida & Kalthoff, 2016[53]
Euroxenomys E. nanus
Mörs & Tomida, 2018[54]
Eomyoidea Eomyidae Megapeomys M. repenningi
Tomida, 2011[55]
Early Miocene
Japaneomys [zh] J. yasunoi
Kimura et al., 2019[56]
Myomorpha Cricetidae Microtus M. epiratticepoides
Kawamura, 1988[57]
MiddleLate Pleistocene
Clethrionomys C. japonicus
Kawamura, 1988[57]
Middle Pleistocene
Cricetulus Cricetulus sp.[58]
Muridae Niviventer Niviventer sp.[59] Late Pleistocene-Holocene
Rattus R. miyakoensis
Kawaguchi, Kaneko & Hasegawa, 2009[60]
Late Pleistocene
Primates Haplorhini Cercopithecidae Kanagawapithecus K. leptopostorbitalis [species] Dolichopithecus (Kanagawapithecus) leptopostorbitalis
Iwamoto, Hasegawa & Koizumi, 2005[61]
Pliocene
Strepsirrhini Sivaladapidae Sivaladapidae sp.[8] EarlyMiddle Eocene
Eulipotyphla Plesiosoricidae [pt] Plesiosorex [it] P. fejfari
Oshima, Tomida & Orihara, 2017[62]
Early Miocene
Soricidae Shikamainosorex S. densicingulata [species]
Hasegawa, 1957[63]
Middle Pleistocene
Anourosorex A. japonicus
Shikama & Hasegawa, 1958[64]
Late Pleistocene
Chiroptera Yangochiroptera Vespertilionidae Pleistomyotis P. longihumeralis[65][58] Middle Pleistocene
Myotis M. okafujii[58]
M. beppuensis[58]
Desmostylia Behemotops B. katsuiei
Inuzuka, 2000[66]
Late Oligocene
Desmostylidae Ashoroa A. laticosta
Inuzuka, 2000[66]
 
Desmostylus D. japonicus
Tokunaga & Iwasaki, 1914[67][68]
  Miocene
Paleoparadoxiidae Paleoparadoxia P. tabatai Cornwallius tabatai
Tokunaga, 1939[69]
 
P. media
Inuzuka, 2005[70]
Artiodactyla Suina Suidae Suidae indet.[50] Palaeochoerus japonicus
Takai, 1954[71]
Early Miocene
Hyotherium H. shanwangense[72] Middle Miocene
Cetancodontamorpha Entelodontidae Entelodon E. gobiensis[73] Late Eocene
Dichobunoidea sp.[8] MiddleLate Eocene
Anthracotheriidae Bothriogenys Bothriogenys sp.[73] Late Eocene
Bothriodon B. sandaensis
Tsubamoto et al., 2007[74]
MiddleLate Eocene
Elomeryx E. japonicus[75] Brachyodus japonicus
Matsumoto, 1925[76]
  Middle Oligocene
Cetacea Sinanodelphis S. izumidaensis [species]
Makiyama, 1936[77]
Miocene
Delphinidae Eodelphinus E. kabatensis Stenella kabatensis
Horikawa, 1977[78]
Norisdelphis N. annakaensis [uk]
Kimura & Hasegawa, 2020[79]
Pseudorca P. yokoyamai
Matsumoto, 1926[80]
Pliocene
Orcinus O. paleorca Orca paleorca
Matsumoto, 1937[81]
Early Pleistocene
Kentriodontidae Kentriodon K. sugawarai [species]
Guo & Kohno, 2021[82]
EarlyMiddle Miocene
K. hobetsu [species]
Ichishima, 1994[83]
Middle Miocene
Monodontidae Haborodelphis H. japonicus [species]
Ichishima et al., 2018[84]
Early Pliocene
Phocoenidae Miophocaena M. nishinoi
Murakami et al., 2012[85]
Late Miocene
Archaeophocaena A. teshioensis
Murakami et al., 2012[85]
Pterophocaena P. nishinoi
Murakami et al., 2012[86]
Haborophocoena H. toyoshimai [species]
Ichishima & Kimura, 2005[87]
Early Pliocene
H. minutus [species]
Ichishima & Kimura, 2009[88]
Numataphocoena N. yamashitai [species]
Ichishima & Kimura, 2000[89]
Ziphiidae Berardius B. kobayashii
Kawatani & Kohno, 2021[90]
MiddleLate Miocene
Allodelphinidae Ninjadelphis N. ujiharai [species]
Kimura & Barnes, 2016[91]
Early Miocene
Awadelphis A. hirayamai
Murakami, 2016[92]
Late Miocene
Miophyseter M. chitaensis
Kimura & Hasegawa, 2022[93]
Early Miocene
Brygmophyseter B. shigensis Scaldicetus shigensis
Hirota & Barnes, 1994[94]
  Middle Miocene
Eomysticetidae Yamatocetus Y. canaliculatus
Okazaki, 2012[95]
Late Oligocene
Balaenidae Idiocetus I. tsugarensis
Matsumoto, 1926[80]
Late Miocene
Archaeobalaena A. dosanko [species]
Tanaka, Furusawa & Kimura, 2020[96]
Early Pliocene
Taikicetus T. inouei
Tanaka, Ando & Sawamura, 2018[97]
Middle Miocene
Isanacetus I. laticephalus [species]
Kimura & Ozawa, 2002[98]
Early Miocene
Diorocetus D. chichibuensis [ja]
Yoshida, Kimura & Hasegawa, 2003[99]
Miocene
D. shobarensis [ja]
Otsuka & Ota, 2008[100]
Middle Miocene
Parietobalaena P. yamaokai [species]
Otsuka & Ota, 2008[100]
Cetotheriidae Hibacetus H. hirosei [species]
Otsuka & Ota, 2008[100]
Joumocetus J. shimizui
Kimura & Hasegawa, 2010[101]
Late Miocene
Balaenopteridae Eschrichtius E. akishimaensis
Kimura, Hasegawa & Kohno, 2018[102]
Early Pleistocene
Ruminantia Cervoidea indet.[50] Amphitragulus minoensis
Matsumoto, 1918[103]
Early Miocene
Cervidae Dicrocerus D. tokunagai
Matsumoto, 1927[104][105]
Cervavus C. oweni hirabayashii
Tokunaga, 1926[106][105]
Late Miocene
Metaplatyceros M. sequoiae
Shikama, 1941[107]
Late Pliocene
Axis A. japonicus[108] Cervus (Axis) japonicus
Otsuka, 1967[109]
Early Pleistocene
Axis kyushuensis[110]
Elaphurus E. akashiensis Cervus akasiensis
Shikama, 1941[107]
Late Pliocene
E. bifurcatus shikamai[111] Elaphurus shikamai [ja]
Otsuka, 1968[112]
Early Pleistocene
E. davidianus tamaensis[111] Elaphurus (Elaphurus) tamaensis
Shikama & Hasegawa, 1976[113]
E. davidianus menziesianus[111] Capreolus (Capreolina) mayai
Tokunaga & Takai, 1936[114]
MiddleLate Pleistocene
Elaphurus mayai[115]
Cervus C. (Nipponicervus) kazusensis[116][108] Cervus (Sika) kazusensis
Matsumoto, 1926[117]
Pleistocene
Cervus (Deperetia) trassaerti
Shikama, 1941[107]
Cervus (Deperetia) urbanus
Shikama, 1941[107]
Cervus (Anoglochis) praenipponicus [ja]
Shikama, 1936[118]
Cervus (Deperetia) naorai
Shikama, 1936[119]
Cervus (Nipponicervus?) takaoi
Otsuka & Shikama, 1977[120]
Cervus (Deperetia) shimabarensis
Otsuka, 1967[109]
C. astylodon Muntiacus astylodon
Matsumoto, 1926[117]
 
Cervus (Rucervus) riukiuensis
Matsumoto, 1926[117]
C. greyi katokiyomasai[121][122] Cervus (Rucervus) katokiyomasai
Shikama & Hasegawa, 1965[123]
Cervus (Sika) natsumei
Matsumoto, 1938[124]
Cervus (Sika) paleoezoensis
Otsuka & Shikama, 1977[120]
C. kyushuensis Cervus (Rusa) kyushuensis
Otsuka, 1966[125]
Early Pleistocene
C. akiyoshiensis Cervus (Nipponicervus) akiyoshiensis
Otsuka, 1977[126]
Late Pleistocene
Sinomegaceros S. yabei [ja][120] Cervus (Sinomegaceros) yabei
Shikama, 1938[127]
  Pleistocene
Megaceros kinryuensis
Matsumoto & Mori, 1956[128]
Megaceros (Sinomegaceros) ordosianus minor
Kamei, 1958[129]
Giraffa (Orasius?) nipponica
Matsumoto, 1926[117][130]
Capreolus C. tokunagai [species]
Otuka, 1941[131]
Capreolus miyakoensis
Hasegawa, Otsuka & Nohara, 1973[132]
PleistoceneHolocene
Bovidae Bubalus Bubalus sp.[58] Middle Pleistocene
Bison B. hanaizumiensis [species] Leptobison hanaizumiensis
Matsumoto & Mori, 1956[128]
  Late Pleistocene
B. priscus[58]
Capricornis C. (?) nikitini[116] Naemorhedus nikitini
Shikama, 1949[133]
Pleistocene
Perissodactyla Hyopsodontidae Hyopsodus Hyopsodus sp.[8] EarlyMiddle Eocene
Hippomorpha Brontotheriidae Brontotheriidae sp.[8]
Equidae Anchitherium Anchitherium aff. A. gobiense[134] Anchitherium hypohippoides
Matsumoto, 1921[135]
Early Miocene
Ancylopoda Isectolophidae Isectolophus [it] Isectolophus sp.[8] EarlyMiddle Eocene
Chalicotheriidae Schizotheriinae sp.[136] Early Miocene
Tapiroidea Helaletidae Plesiocolopirus P. grangeri[8] Desmatotherium grangeri
Tokunaga, 1933[137]
Middle Eocene
P. kushiroensis [ja] Colodon kushiroensis
Tomida, 1983[138]
Middle EoceneEarly Oligocene
Tapiridae Plesiotapirus P. yagii [species] Palaeotapirus yagii
Matsumoto, 1921[135]
  Early Miocene
Rhinocerotoidea Hyrachyidae [nl] Hyrachyus cf. Hyrachyus sp.[74] EarlyMiddle Eocene
Amynodontidae Zaisanamynodon Zaisanamynodon cf. Z. protheroi[8] MiddleLate Eocene
cf. †Z. borisovi[8] Late Eocene
Amynodon [it] A. watanabei[8] Amynodon (?) watanabei
Tokunaga, 1926[139]
MiddleLate Eocene
Rhinocerotidae Brachypotherium B. pugnator[136] Teleoceras (Brachypotherium) pugnator
Matsumoto, 1921[135]
  Early Miocene
Chilotherium pugnator
Teleoceras (?) kaniensis
Tokunaga, 1926[139]
Teleoceras (?) tokiensis
Tokunaga, 1926[139]
Plesiaceratherium Plesiaceratherium sp.[50]
Stephanorhinus S. kirchbergensis[140] Dicerorhinus nipponicus [ja]
Shikama, 1967[141]
  Middle Pleistocene
Rhinoceros shindoi
Tokunaga, 1931[142]
Carnivora Miacidae Miacidae sp.[8] EarlyMiddle Eocene
Feliformia Felidae Panthera P. youngi[143] Felis youngi Middle Pleistocene
Felis F. microtus[144] Pleistocene
Amphicyonoidea Amphicyonidae Ysengrinia Ysengrinia sp.[145] Middle Miocene
Canoidea Canidae Canis C. falconeri[146] Early Pleistocene
Cuon Cuon sp.[147] Middle Pleistocene
Nyctereutes N. viverrinus nipponicus
Shikama, 1949[133]
Pleistocene
Musteloidea Ailuridae Parailurus Parailurus sp.[148] EarlyMiddle Pliocene
Mustelidae Meles M. mukasianakuma
Shikama, 1949[133][58]
Middle Pleistocene
M. leucurus kuzuuensis
Shikama, 1949[133][58]
Martes M. ten [species]
Shikama, 1949[133]
Pleistocene
Enhydrictis E. (Oriensictis) nipponica Lutra nipponica
Naora, 1968[149]
Middle Pleistocene
Oriensictis nipponica[150]
Mustela M. constricta[58][144]
M. kuzuuensis[58] Putorius kuzuuensis
Shikama, 1949[133]
Late Pleistocene
Pinnipedia[151] Desmatophocidae Allodesmus[152] A. uraiporensis [species]
Tonomori et al., 2018[152]
  Middle Miocene
A. naorai [species]
Kohno, 1996[153]
A. sinanoensis[153] Eumetopias sinanoensis
Nagao, 1941[154]
 
Megagomphos sinanoensis[155]
Allodesmus megallos
Hirota, 1995[155]
Allodesmus sadoensis
Hirota, 1995[155]
Allodesmus sp.[156]  
Otariidae Thalassoleon T. inouei
Kohno, 1992[157]
Pliocene
Oriensarctos O. watasei [species] Eumetopias watasei
Matsumoto, 1925[158]
Early Pleistocene
Callorhinus C. gilmorei[159] Pliocene
Otariidae sp. Eumetopias ojiyaensis [species]
Horikawa, 1981[160]
Late Pleistocene
Odobenidae Prototaria P. planicephala
Kohno, 1994[161]
Middle Miocene
P. primigena
Takeyama & Ozawa, 1984[162]
Pseudotaria P. muramotoi [species]
Kohno, 2006[163]
Miocene
Archaeodobenus A. akamatsui
Tanaka & Kohno, 2015[164]
  Late Miocene
Protodobenus P. japonicus [species]
Horikawa, 1995[165]
Early Pliocene
Odobenus O. mandanoensis [species]
Tomida, 1989[166]
Middle Pleistocene

Historical extinctions and local extirpations edit

Order Clade Family Genus Species Synonyms Image Age
Sirenia Dugongidae Hydrodamalis H. gigas[46] EarlyMiddle Pleistocene
Rodentia Myomorpha Cricetidae Microtus M. oeconomus[58] Late Pleistocene
M. fortis[58]
Myopus M. schisticolor[58] Middle Pleistocene
Artiodactyla Ruminantia Cervidae Cervus C. unicolor[167] Pliocene
Alces A. alces[168] Late Pleistocene
Moschidae Moschus M. moschiferus[133] Pleistocene
Bovidae Bos B. primigenius[58] Late Pleistocene
Carnivora Feliformia Felidae Panthera P. pardus[144] Pleistocene
P. tigris[144][116]
Lynx L. lynx[144][169] Late Pleistocene-Holocene

Fossil species synonymized with extant or recently extinct species edit

Order Clade Family Genus Species Synonyms Image Age
Artiodactyla Suinae Suidae Sus S. scrofa[170] Sus nipponicus
Matsumoto, 1915[171]
MiddleLate Pleistocene
Sus cf. lydekkeri[133]
Perissodactyla Hippomorpha Equidae Equus E. caballus[172] Equus nipponicus
Shikama & Onuki, 1962[173]
Late PleistoceneHolocene
Carnivora Arctoidea Ursidae Ursus U. arctos[174] Ursus tanakai
Shikama, 1949[133]
Pleistocene
Pinnipedia Otariidae Zalophus Z. californianus[175]: 72  Eumetopias (?) kishidai
Shikama, 1953[176]
Z. japonicus[175]: 72  Zalophus kimitsensis
Matsumoto, 1939[177]
Early Pleistocene

See also edit

References edit

  1. ^ "IUCN Red List>Advanced Search>Taxonomy: Mammalia — Red List Category: Extinct — Land Regions: Japan". IUCN. Retrieved 28 June 2022.
  2. ^ レッドリスト 哺乳類 [Red List: Mammals] (in Japanese). Ministry of the Environment. 27 March 2020. Retrieved 28 June 2022.
  3. ^ Tsubamoto Takahisa; Rougier, Guillermo W.; et al. (2004). "New Early Cretaceous spalacotheriid "symmetrodont" mammal from Japan" (PDF). Acta Palaeontologica Polonica. 49 (3): 329–346. ISSN 0567-7920.
  4. ^ Rougier, Guillermo W.; Isaji Shinji; Manabe, M. (2007). "An Early Cretaceous mammal from the Kuwajima Formation (Tetori Group), Japan, and a reassessment of triconodont phylogeny". Annals of Carnegie Museum. 76 (2): 73–115. doi:10.2992/0097-4463(2007)76[73:AECMFT]2.0.CO;2. S2CID 85626914.
  5. ^ a b Kusuhashi Nao (2008). "Early Cretaceous multituberculate mammals from the Kuwajima Formation (Tetori Group), central Japan" (PDF). Acta Palaeontologica Polonica. 53 (3): 379–390. doi:10.4202/app.2008.0302. ISSN 0567-7920. S2CID 56378037.
  6. ^ Kusuhashi Nao; Tsutsumi Yukiyasu; Saegusa Haruo; et al. (2013). "A new Early Cretaceous eutherian mammal from the Sasayama Group, Hyogo, Japan". Proceedings of the Royal Society B. 280 (1759). doi:10.1098/rspb.2013.0142. ISSN 0962-8452. PMC 3619506. PMID 23536594. 20130142.
  7. ^ Setoguchi Takeshi; Tsubamoto Takehisa; et al. (1999). "An early Late Cretaceous mammal from Japan, with reconsideration of the evolution of tribosphenic molars". Paleontological Research. 3 (1): 18–28. doi:10.2517/prpsj.3.18 (inactive 31 January 2024). ISSN 1342-8144.{{cite journal}}: CS1 maint: DOI inactive as of January 2024 (link)
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  9. ^ Miyata Kazunori; Tomida Yukimitsu (1998). "A new tillodont from the early Middle Eocene of Japan and its implication to the subfamily Trogosinae (Tillodontia: Mammalia)". Paleontological Research. 2 (1): 53–66. doi:10.2517/prpsj.2.53 (inactive 31 January 2024).{{cite journal}}: CS1 maint: DOI inactive as of January 2024 (link)
  10. ^ a b Matsumoto Hikoshichirō (1924). 日本産マストヾンの二新種(略報) [Preliminary notes on two new species of fossil mastodon from Japan]. Journal of the Geological Society of Tokyo (in Japanese). 31 (375): 395–414. doi:10.5575/geosoc.31.375_395. ISSN 0016-7630.
  11. ^ a b Makiyama Jirō [in Japanese] (1938). "Japonic Proboscidea". Memoirs of the College of Science, Kyoto Imperial University. Series B. 14 (1): 1–59. hdl:2433/257870. ISSN 0368-8895.
  12. ^ Kamei Tadao [in Japanese] (2000). 「日本の長鼻類化石」とそれ以後 [On Japanese Proboscidean Fossils and views of the studies after that]. Earth Science (Chikyū Kagaku) (in Japanese and English). 54 (4): 211–230. doi:10.15080/agcjchikyukagaku.54.4_211.
  13. ^ Saegusa Haruo (2008). "Dwarf Stegolophodon from the Miocene of Japan: Passengers on sinking boats". Quaternary International. 182 (1): 49–62. Bibcode:2008QuInt.182...49S. doi:10.1016/j.quaint.2007.08.001.
  14. ^ Yabe Hisakatsu (1950). "Three Alleged Occurrences of Stegolophodon latidens (Clift) in Japan". Proceedings of the Japan Academy. 26 (9): 61–65. doi:10.2183/pjab1945.26.9_61. ISSN 0021-4280.
  15. ^ Shikama Tokio; Kirii Yoshihiro (1956). "304. A Miocene stegolophodon from Yatuo Group in Toyama Prefecture" 富山県八尾層群産の中新世Stegolophodon [A Miocene Stegolophodon from Yatuo Group in Toyama Prefecture]. Transactions and Proceedings of the Paleontological Society of Japan. New Series (in English and Japanese). 24 (24): 285–289. doi:10.14825/prpsj1951.1956.24_285. ISSN 0031-0204.
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