摘要
1991年夏,地矿部沈阳地质矿产研究所苏养正先生来京,转交给我所一采自黑龙江省桦南县的哺乳动物牙齿化石以及一些鱼类化石请求鉴定.10月,笔者据此线索前往桦南县进行实地考察.其间曾到桦南县四方台村观察采到化石的砂金矿井内的地层剖面.黑龙江省地质三大队的倪春林工程师又将在同一地点采到的其它牙齿化石交与笔者,同时尚有一些鱼类及植物化石.经鉴定。
A Neogene probodcid fossil, Zygolophodon sp., from Huanan county of Hilongjiang province is briefly reported here. The geological section of the placer gold well from which the fossils were collected is as follows (from the top to the bottom): 4. Quaternary soil; 3. Neogene basalt (ca. 15m); 2. Miocene Daotaiqiao Formation: upper part: yellow-green and black clay with fossil fishes and plants (ca. 15m); lower part: placer gold mine with fossil mammal (ca. lm); 1. Bed rock: miscellanious granites. The mammalian fossil includes M^1, M^2 and a piece of incisor. The diameter (major axis) of the incisor is 103mm. The classification of the fossil mammal is as follows: Proboseidea Mastodontoidea Mammutidae Zygolophodon sp. The main characters of anterior molars (M^1 and M^2) of Zygolophodon are: 1) having three rows of transversal loph and almost no other additional structures; 2) developed medial longitudinal sulcus; and 3) zygodont crest very clear. According to these characters, the fossil mammal should be referred to as the genus Zygolophodon.
出处
《古脊椎动物学报》
CSCD
北大核心
1992年第4期325-326,共2页
Vertebrata Palasiatica
