In the African Pleistocene, the fossil evidence for early Homo sapiens populations is still relatively limited. Here we present two additional specimens (two deciduous teeth) recovered from the Middle Stone Age (MSA) deposits of Sibudu Cave (KwaZulu-Natal, South Africa). We describe their morphology and metrics, using three-dimensional models of the teeth obtained from high-resolution micro-CT images. The first specimen is a Ldm₁ (HUM. TO 1) recovered in the BS5 layer dated 77.3±2.7 ka, and associated with stone tools assigned to the "pre-Still Bay" assemblage. The other specimen is a Rdi₁ (HUM. TO 2) coming from the Pinkish Grey Sand (PGS) layer, dated 64.7±2.3 ka, and associated with a Howieson's Poort industry. Both teeth are well preserved, with minor post mortem cracks not affecting the overall morphology, and they comprise the intact, worn crown and the remnants of the roots, naturally resorbed. A large carious lesion occupies most of the distal face and part of the occlusal surface in the Ldm₁; also a chip of enamel is missing from the disto-buccal corner. For both teeth, we compared mesio-distal (MD) and bucco-lingual (BL) diameters with those of other Late Pleistocene deciduous teeth and extant Homo sapiens. The analysis has shown that the teeth are comparable in size with the other MSA specimens described in the literature.

中文翻译：

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来自西布杜洞穴（南非）中石器时代的人类乳牙。

在非洲更新世，早期智人的化石证据仍然相对有限。在这里，我们介绍了另外两个从西布杜洞穴（南非夸祖鲁-纳塔尔省）的中石器时代（MSA）矿床中发现的标本（两个乳齿）。我们使用从高分辨率微CT图像获得的牙齿的三维模型来描述它们的形态和度量。第一个标本是在BS5层中发现的Ldm ka（腐殖土TO 1），日期为77.3±2.7 ka，并与分配给“ Still Bay”组合的石器相关。另一个标本是Rdi₁（Hum。TO 2），来自粉红色灰砂（PGS）层，日期为64.7±2.3 ka，与Howieson的Poort工业相关。两颗牙齿都保存完好，尸体上的细小裂纹不会影响整体形态，它们包括完好无损的旧冠以及自然吸收的根部残留物。Ldm₁的大部分远端面和部分咬合面占据了较大的龋齿病灶。口腔颊角也缺少牙釉质。对于这两种牙齿，我们将近中距（MD）和颊舌（BL）的直径与其他晚更新世的乳牙和现存的智人的直径进行了比较。分析表明，牙齿的大小与文献中描述的其他MSA标本相当。我们将近中距（MD）和颊舌（BL）的直径与其他晚更新世的乳牙和现存的智人的直径进行了比较。分析表明，牙齿的大小与文献中描述的其他MSA标本相当。我们将近中距（MD）和颊舌（BL）的直径与其他晚更新世的乳牙和现存的智人的直径进行了比较。分析表明，牙齿的大小与文献中描述的其他MSA标本相当。