首页> 外文期刊>Journal of Systematic Palaeontology >The most ancient roach (Blattodea): a new genus and species from the earliest Late Carboniferous (Namurian) of China, with a discussion of the phylomorphogeny of early blattids
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The most ancient roach (Blattodea): a new genus and species from the earliest Late Carboniferous (Namurian) of China, with a discussion of the phylomorphogeny of early blattids

机译:最古老的蟑螂(Blattodea):中国最早的石炭纪(Namurian)的新属和种,并讨论了早期Blattid的系统形态

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The most ancient known roach, Qilianiblatta namurensis gen. et sp. nov. from the earliest Pennsylvanian (Namurian B/C) Qilianshan entomofauna, is described from material excavated in the Qilianshan Mountains of north-western China. The new genus is characterized by a mosaic of plesiomorphic and apomorphic features typical of various Euramerican and Angaran Late Palaeozoic blattid genera. Despite a limited time gap between the age of Q. namurensis and that of the previously known oldest blattids (archimylacrids of Westphalian A age, 1-2 Ma younger), the pattern of main veins and cross venation of Q. namurensis appears in some regards more advanced. This is particularly apparent in the only weakly expressed primary dichotomy of main veins and the relatively modern aspect of the cross venation. The new taxon raises questions regarding the polyphyletic origin of the 'phyloblattoid' groundplan, namely once in the Euramerican biotic province at the end of the Westphalian and stemming from archimylacrids, and earlier in the Cathaysian (-Angaran?) biotic province from forms like Qilianiblatta. Forewings of Q. namurensis are clearly protective wings (tegmina) and probably were not involved directly in the production of lift during flight. These wings are considerably advanced relative to the earliest diversification of the winged insects and the general groundplan for hexapodan wings. It is possible that winged blattids appeared as early as the Devonian.
机译:最古老的蟑螂是奇连尼布拉塔纳穆里根(Qiananiblatta namurensis gen)。等。十一月最早来自宾夕法尼亚州(Namurian B / C)的祁连山昆虫动物,是从中国西北地区祁连山山脉出土的材料中描述的。该新属的特征是各种古欧亚和安加拉晚古生代钝角属的典型的多形和复形特征的镶嵌。尽管纳穆尔Q.年龄和先前已知的最古老的Blattis(威斯特伐利亚A年龄的弓形纲,年龄1-2 Ma以下)之间的时间间隔有限,但纳穆尔Q.的主要静脉和交叉静脉的形态在某些方面还是出现了更先进。这在主静脉仅有的表达较弱的主二分法和相对较现代的交叉静脉方面尤为明显。新的分类单元提出了有关“叶类目”计划的多系起源的问题,即曾经在威斯特伐利亚州的欧亚生物省,起源于古菌纲,更早的在凯撒生(-安加拉邦)生物省,其形式如齐利亚尼布拉塔。 。 Q. namurensis的前翅显然是保护性的机翼(飞翅),可能在飞行过程中不直接参与产生升力。相对于最早的有翅昆虫的多样性和六足动物翅膀的总体规划而言,这些翅膀的推进相当大。有翼的blattds可能早在泥盆纪出现。

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