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首页> 外文会议>International Conference on Trilobites and their Relatives >Early post-embryonic trilobite stages and possible eggs from the 'Túnel Ordovícico del Fabar' (Middle Ordovician, northwestern Spain)
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Early post-embryonic trilobite stages and possible eggs from the 'Túnel Ordovícico del Fabar' (Middle Ordovician, northwestern Spain)

机译：早期的胚胎后三叶虫阶段和来自'túnelorovícicodelbaar'的可能鸡蛋（中奥陶诺维安，西班牙西班牙西班牙）

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The sub-surface section of the Middle Ordovician Sueve Formation of the Cantabrian Zone, studied during the construction of a tunnel in the A-8 free highway of northern Spain, provided abundant fossiliferous horizons rich in trilobites of Darriwilian age. Finegrained mudstones of the Cofi?o Member delicately preserve a number of early stages of the calymenacean trilobite Prionocheilus mendax (Van?k), from protaspides to meraspid degree 2, including in situ exuviae with disarticulated librigenae. From the upper part of the Bayo Member, small clusters of pyrite spheres ca. 0.5 mm in diameter are recorded, and may represent eggs of trilobites, being associated with the pliomerid Placoparia (Coplacoparia) tournemini. (Rouault) in the same beds. The sphaeroids may represent the pyrite infilling of the internal cavity of possible eggs, and the covering is replaced by phyllosilicates. Differences in shape and size from presumed olenid eggs may be caused by the particular environmental adaptations of the latter group. The relatively large size of both the calymenid larvae and the pyritized eggs suggests a lecithotrophy development related to higher latitudes and/or with scarce organic matter. □ Development, fossil eggs, Gondwana, lecithotrophy, Spain, trilobites.
机译：在南西班牙A-8自由公路的隧道建设期间，研究了奥莫诺迪亚Sueve地层的奥陶涅迪师傅的落叶菊地面，提供丰富的达里威尼年龄的三叶虫的丰富的化纤视野。 Cofi的Finegratmatreatmone的Mudstones精致地保护了杀菌剂的若干杀菌剂（van？K）的早期阶段，从灭菌剂到MeraSpid Stoction2，包括与纯粹的柿子的原位exuviae。从Bayo成员的上半部分，小簇的黄铁矿球形CA。记录了0.5mm的直径，可以代表三叶虫的卵，与PlioMerid Paruala aria（共裂藻疟原虫）塔内尼尼有关。 （rouault）在同一张床上。斯巴氏素可以代表可能卵的内腔的黄铁矿，并且覆盖物被Phyllosilicates取代。假定蛋白蛋的形状和大小的差异可能是由后一组的特定环境适应引起的。 Calymenid幼虫和嗜酸性卵的相对大的尺寸表明，卵磷脂萎缩的发育与较高的纬度和/或稀缺有机物有关。 □发展，化石蛋，吉隆坡，卵石手枪，西班牙，三叶虫。

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