CAJ | 학술논문

利用光学显微镜和扫描电镜首次对云南省楚雄州晚中新世石灰坝组石鼓村层的钙化木材进行了解剖学研究.鉴定出两种类型的木材:柳杉型落羽杉型木(Taxodioxylon cryptomeripsoides Schonfeld)和杉木型落羽杉型木(Taxodioxylon cunninghamioides Watari).二者分别与现代柳杉属和杉木属具有最接近的亲缘关系.根据这两种杉科化石木现存最近亲缘种的生态环境,并综合其他资料,推测该地区在晚中新世为温暖湿润的亚热带气候环境.
이용광학현미경화소묘전경수차대운남성초웅주만중신세석회패조석고촌층적개화목재진행료해부학연구.감정출량충류형적목재:류삼형락우삼형목(Taxodioxylon cryptomeripsoides Schonfeld)화삼목형락우삼형목(Taxodioxylon cunninghamioides Watari).이자분별여현대류삼속화삼목속구유최접근적친연관계.근거저량충삼과화석목현존최근친연충적생태배경,병종합기타자료,추측해지구재만중신세위온난습윤적아열대기후배경.
Late Miocene woods were investigated from the Lühe Basin in Chuxiong Borough, central Yunnan, China. The calcified woods preserved in the Shigucun member of the Shihuiba Formation, are represented by fallen logs and stumps. Two species of fossil wood, Taxodioxylon cryptomeripsoides Schonfeld 1953 and T. cunninghamioides Watari 1948, are described. Their anatomical structure shows striking similarities to the woods of Cryptomeria and Cunninghamia respectively. That the two fossil woods are classed in the Taxodiaceae suggest a subtropical, humid, and warm environment in Lühe during Late Miocene. They compare favorably to other fossil specimens and species reported from localities ranging from Cretaceous to Pliocene. This is the first record of the presence of the species T. cryptomeripsoides and T. cunninghamioides in Late Miocene of Yunnan.