Departmental Bulletin Paper 岐阜県熊石洞産の後期更新世のヤベオオツノジカとヘラジカの化石(その1)角・頭骨・下顎骨・歯
Yabe's giant deer and elk remains from the Late Pleistocene of Kumaishi-do Cave, Gifu Prefecture, central Japan (Part 1): Antlers, a skull, mandibles, and teeth
ギフケンクマイシドウサンノコウキコウシンセイノヤベオオツノジカトヘラジカノカセキ(ソノイチ)ツノ・ズコチ・カガクコツ・ハ

奥村, 潔  ,  石田, 克  ,  樽野, 博幸  ,  河村, 善也  ,  Kiyoshi, Okumura  ,  Shinogu, Ishida  ,  Hiroyuki, Taruno  ,  Yoshinari, Kawamura  ,  岐阜県博物館  ,  大阪市立自然史博物館  ,  愛知教育大学  ,  Gifu Prefecture Museum  ,  Osaka Museum of Natural History  ,  Aichi University of Education

Description
熊石洞は日本の代表的な後期更新世の哺乳類化石産地の一つである.この洞窟の化石堆積物の発掘調査は主に1965年から1981年まで行われ,保存のよい大型シカ化石を含む多数の哺乳類化石を産出した.本報告では,大型シカ化石の詳細な記載を行うが,これによりほぼ同じ大きさのヤベオオツノジカ(Sinomegaceros yabei)とヘラジカ(Alces alces)という2種の大型シカの区別を明確にする.日本においてこの大型シカ2種はしばしば混同されてきたが,骨および歯の特徴からこの2種の識別を行う.また,主に角の形態的特徴に基づき,ヤベオオツノジカが中国産Sinomegacerosの種とは別個の日本固有の種であることを確認する.さらに,歯の萌出と咬耗の程度に基づいて2種の大型シカの年齢構成も明らかにする.
Kumaishi-do Cave is one of representative Late Pleistocene mammal fossil localities in Japan. The excavations of fossilferous sediments in the cave had been conducted from 1965 to 1981, and had produced a large number of mammal remains including well preserved large-sized deer remains. This paper provides detailed systematic descriptions for the deer remains, which are assigned to two species with nearly the same size, the Yabe's giant deer (Sinomegaceros yabei) and elk (Alces alces). Remains of the two species have been often lumped to be the giant deer in Japan, and thus this paper presents osteological and dental features which distinguish the two species. Based on osteological features, mainly on antler morphology, this paper confirms that the Yabe's giant deer is a Japanese endemic species distinct from Chinese species of the genus Sinomegaceros. This paper also reveals the age structures in the remains of the two deer species based on the degree of tooth eruption and abrasion.

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