缅甸中始新世晚期邦塘组Paukkaungmeryx minutus(鲸偶蹄目,古鼷鹿科)新材料

New material of Paukkaungmeryx minutus(Cetartiodactyla,Archaeomerycidae)from the late Middle Eocene Pondaung Formation,Myanmar

描述了缅甸中部邦塘组Myaukse Kyitchaung地点原始反刍类古鼷鹿科小包康鼷鹿(Paukkaungmeryx minutus Ducrocq et al.,2020)的牙齿新材料。新材料的上臼齿与正型标本相比形态上仅有微小的变异,如更加发育的颊侧和舌侧齿带。下颊齿具有原始的特征,包括:简单的p4,下臼齿呈丘月齿型,以及下三角座后壁无“褶”状结构。新材料的发现使Paukkaungmeryx成为邦塘发现的第二个同时保存上、下牙齿的古鼷鹿科成员,也展现了古鼷鹿科早期演化的复杂历史。

We describe here new dental material from the locality of Myaukse Kyitchaung(Pondaung Formation,central Myanmar)that we refer to the primitive Archaeomerycidae ruminant Paukkaungmeryx minutus Ducrocq et al.(2020).The upper molars are morphologically very similar to those of the holotype and exhibit only slight variations on features like the better development of buccal and lingual cingula.The lower teeth display primitive characters including a simple p4 and bunoselenodont lower molars that lack folds on the back of the trigonid wall.This additional material makes Paukkaungmeryx the second archaeomerycid in Pondaung known by upper and lower teeth material,and documents the apparently complex early evolution of the family.