The exine ultrastructure of Pretricolpipollenites bharadwajii from the Permian of Jordan

被引：2
作者：
Tekleva, Maria, V [1 ]
Stephenson, Michael H. [2 ]
Zavialova, Natalia E. [1 ]
机构：
[1] Russian Acad Sci, AA Borissiak Paleontol Inst, Profsajuznaya Str 123, Moscow 117697, Russia
[2] British Geol Survey, Nottingham NG12 5GG, England
来源：
REVIEW OF PALAEOBOTANY AND PALYNOLOGY | 2019年 / 268卷
基金：
俄罗斯基础研究基金会;
关键词：
Pretricolpipollenites; Eucommiidites; Trisulcate pollen; Exine ultrastructure; Permian; UMM IRNA FORMATION; DEAD-SEA; POLLEN; EUCOMMIIDITES; PALYNOLOGY; EVOLUTION;
D O I：
10.1016/j.revpalbo.2019.05.003
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
Dispersed trisulcate pollen grains of Pretricolpipollenites bharadwajii from the ?latest Permian of Jordan were studied with light, scanning, and transmission electron microscopy. The three sulci are located on the disal side. The median sulcus is usually longer, wider than the other two sulci, and has rounded aperture ends. The exine sculpturing and aperture membrane are scabrate. The ectexine includes a thick tectum, granular infratectum, and thin foot layer. The endexine is lamellate. A comparison with the closest similar genus Eucommiidites suggests overlapping characters; though the position of the three sulci on the distal side in Pretricolpipollenites bharadwajii and sulci on different sides in Eucommiidites indicates a possible distinguishing feature. Studies of exine ultrastructure of the other two Pretricolpipollenites species are needed to support or discard the distinction of Pretricolpipollenites and Eucommiidites. (C) 2019 Published by Elsevier B.V.
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收藏
页码：19 / 28
页数：10
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