A new miospore genus, Maiaspora, is described from the upper Visean (middle Mississippian) of the southern wing of Moscow Syneclise (European Russia). Applying a combination of methods (optical light microscopy (LM), scanning‐electron microscopy, confocal laser microscopy (CLSM) and image analysis) to the same individual miospore specimens revealed a remarkable sculptural type for which we propose the new term ‘metareticuloid’. Metareticuloid sculpture is defined as a complex arrangement of muri with apiculate elements, polygonal lumina and circular scrobiculae at the base of the lumina. The discovery of fossil spores with metareticuloid sculpture allows the recognition of clear morphological differences between microreticulate and foveolate sculptures, which palynologists have historically had difficulty in separating. Virtual cross‐sections provided by CLSM show that miospores with metareticuloid sculpture display perfectly preserved, funnel‐shaped tunnels (like a gallery of cave stalactites) in the deep exospore. In contrast, miospores with microreticulate or reticulate and partly vermiculate sculpture lack such vertical tunnels (termed scrobiculae). The morphology of Maiaspora gen. nov. is considered in comparison with Microreticulatisporites (Knox non sensu Potonié & Kremp) Bhardwaj emended Oshurkova, Pseudoreticulatispora Bharadwaj & Srivastava emended Price & Foster, Vadaszisporites (Deák & Combaz) emended Juhász, Foveosporites Balme, Foveotriletes van der Hammen ex Potonié, Garotriletes Singh & Singh, Assamiasporites Mehrota & Sah, and Margotriletes Mehrota & Sah. The morphological conceptions of Microreticulatisporites and Foveotriletes are reinterpreted by numerical typification. The adaptative significance of metareticuloid sculpture is discussed in relation to modern and fossil spores, and in terms of harmomegathic mechanisms of angiosperm pollen.

中文翻译：

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玛雅波拉（Miaaspora）：一种新的苗孢子属，带有来自欧洲晚期俄国人的神秘雕塑

苗族的一个新种，马亚坡拉（Miaaspora），从莫斯科Syneclise（欧洲俄罗斯）南部机翼的上部Visean（密西西比中部）进行描述。将方法（光学显微镜（LM），扫描电子显微镜，共聚焦激光显微镜（CLSM）和图像分析）组合应用于同一单个孢子标本时，发现了一种非凡的雕刻类型，为此我们提出了新的术语``类金刚烷''。元网状雕塑被定义为穆里的复杂排列，其尖锐的元素，多角形的管腔和在管腔底部的圆形scrobiculae构成。具网状雕刻的化石孢子的发现可以识别微网状和凹状雕塑之间的明显形态差异，这是古生物学家历来难以分离的。CLSM提供的虚拟横截面显示，带有网状网状雕塑的小孢子在外孢子深处显示出保存完好的漏斗形隧道（如洞穴钟乳石的长廊）。相反，具有微网状或网状且部分为mic刻的雕塑的小孢子缺乏这种垂直通道（称为草）。的形态马亚斯波拉（Miaaspora gen）。十一月 相比被认为是与Microreticulatisporites（诺克斯非意义上Potonié＆KREMP）巴德瓦杰仔细的校勘Oshurkova，Pseudoreticulatispora巴拉德瓦＆塔瓦仔细的校勘价格和福斯特，Vadaszisporites（就是Deák＆Combaz）仔细的校勘Juhász，Foveosporites巴姆，Foveotriletes范德Hammen前Potonié，Garotriletes辛格与辛格，Assamiasporites Mehrota＆Sah和Margotriletes Mehrota＆Sah。微网纹孢子和黄单胞菌的形态学构想通过数字类型重新解释。讨论了网状雕塑的适应性意义，涉及现代孢子和化石孢子，以及被子植物花粉的致密机理。