CAJ | 학술논문

详细描述了陕西蓝田晚中新世灞河组发现的两种鼠科化石:中华原裔鼠Progonomyssinensis sp.nov.和Muridae gen.et sp.indet..新种的特征是:个体通常比Progonomys cathalaiSchaub,1938大;下臼齿的唇侧齿带和附属尖很弱;三分之二的m1具有一很小的中间前边尖(tma);M1的t1和t3偶见后刺,在个别的m1中有一短的中间脊;臼齿的尺寸落入P.woelferi的变异范围,但t6～t9间的连接没有该种那样常见,而t12较为明显.新种产于灞河组下部层位,其牙齿的大小和形态特征介于Progonomys cathalai Schaub,1938与P.woelferi Bachmayer et Wlson,1970之间.据此可证实,把灞河组下部层位的时代置于晚中新世早期,相当欧洲瓦里士期晚期或MN10的时代比较恰当.新种的重要意义不仅在于它具有狭义Progonomys属的特征,而且是我国现知鼠科动物最古老的一种.未定种产于灞河组较上部层位,牙齿形态与Progonomys sinensis的相似,很可能与其有较接近的亲缘关系.
상세묘술료협서람전만중신세파하조발현적량충서과화석:중화원예서Progonomyssinensis sp.nov.화Muridae gen.et sp.indet..신충적특정시:개체통상비Progonomys cathalaiSchaub,1938대;하구치적진측치대화부속첨흔약;삼분지이적m1구유일흔소적중간전변첨(tma);M1적t1화t3우견후자,재개별적m1중유일단적중간척;구치적척촌락입P.woelferi적변이범위,단t6～t9간적련접몰유해충나양상견,이t12교위명현.신충산우파하조하부층위,기아치적대소화형태특정개우Progonomys cathalai Schaub,1938여P.woelferi Bachmayer et Wlson,1970지간.거차가증실,파파하조하부층위적시대치우만중신세조기,상당구주와리사기만기혹MN10적시대비교흡당.신충적중요의의불부재우타구유협의Progonomys속적특정,이차시아국현지서과동물최고로적일충.미정충산우파하조교상부층위,아치형태여Progonomys sinensis적상사,흔가능여기유교접근적친연관계.
Two forms of Muridae,Progonomys sinensis sp.nov.and Muridae gen.et sp.indet.from the late Miocene Bahe Formation at Lantian,Shaanxi Province are described.The new species,occurring in lower horizons of the formation,demonstrates intermediate characters between P.cathalai and P.woelferi in dimension and morphology.The new murid argues for an age of early late Miocene for the lower portions of the Bahe Formation,corresponding to early Baodean of Chinese Land Mammal Age,which can be correlated with late Vallesian or MN10 of Europe.Consequently,the new species is important because it represents diversity in the species of the genus Progonomys and the oldest murid known in China.The indeteminate species was probably closely allied to the new species.