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Megaspore Biharisporites Potonié from the Triassic of Nidpur, Madhya Pradesh, India: A New Report
Journal of the Geological Society of India ( IF 1.3 ) Pub Date : 2021-05-13 , DOI: 10.1007/s12594-021-1716-0
Neelam Das , Nupur Bhowmik , Shabnam Parveen

The article reports a dispersed megaspore morphotaxon, Biharisporites Potonié for the first time from the Nidpur beds, Madhya Pradesh, India. The megaspores are structurally preserved compressions and reveal the presence of lycopsids in the parent flora, though macrofossil evidence of such plants is almost lacking. The diagnosis of Biharisporites is emended, to include all externally similar cavate spore types, irrespective of whether their inner sac/nexine/inner body/mesosporium/inner exospore, is pitted/cushioned or unpitted. The megaspores assigned to the genus are represented by two new species, viz., Biharisporites gopalii sp. nov. and B. bosei sp. nov. They are rare, non-lageniculate, trilete megaspores having spinae or coni on both proximal and distal surfaces. Though the early Triassic has traditionally been interpreted as semi-arid, the recovery of carbonaceous debris from the non-coal bearing Nidpur beds suggests a favourable climate for vegetation in the middle Triassic (Anisian-Ladinian) at the time of deposition of plant debris.



中文翻译:

印度中央邦尼德普尔三叠纪的大孢子BiharisporitesPotonié:一项新报道

该文章首次报道了印度中央邦尼德普尔河床首次散布的大孢子吗啉,BiharisporitesPotonié。大孢子在结构上保留了压缩物,并揭示了亲本菌群中番茄红素的存在,尽管几乎没有此类植物的大化石证据。对Biharisporites的诊断进行了改进,以包括所有外部相似的空洞孢子类型,而不论其内部囊/内毒素/体内/中孢子/内部外孢子是有凹坑/有垫块还是无凹坑。属于该属的大孢子由两个新种Biharisporites gopalii sp。代表。十一月 和波西sp。十一月 它们是在近端和远端表面均具有棘突或圆锥形的稀有,非褐毛病,三生大孢子。尽管传统上将三叠纪早期解释为半干旱,但从无煤的Nidpur床中回收碳质碎屑表明,在沉积植物碎屑时,三叠纪中部(阿尼西亚-拉丁尼亚)的植被气候宜人。

更新日期:2021-05-13
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