期刊
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS
卷 93, 期 1, 页码 -出版社
ACAD BRASILEIRA DE CIENCIAS
DOI: 10.1590/0001-3765202120190094
关键词
Faunipollenites; India; morphology; Permian; Protohaploxypinus; taxonomy
资金
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [300578/2015-6, 150574/2015-0, 304978/2013-2, PIP CONICET 0812-2015-2017]
Faunipollenites Bharadwaj is confirmed as a junior synonym of Protohaptoxypinus, with Indian workers considering it a valid genus. The presence or absence of distinct central body and folds in the distal attachment did not show significant differences between samples with longer and shorter oxidation treatment.
Faunipollenites Bharadwaj is considered a juniorsynonym of Protohaptoxypinus Samoilovich emend. Morbey. However, Indian workers claim it is a valid genus due to a poorly defined corpus and absence of folds in distal attachment. In India, a standard method is applied including the oxidization with HNO3 more than 48 hours (+10' of KOH). We analyze the effects of that treatment on the morphology of pollen grains of both genera in samples from the Permian of India and Brazil. The same samples are also processed with HCl, HF, two hours of HNO3 and 2' of KOH and slides are mounted after each step. Our analysis reveals that distinct or indistinct central body and presence/ absence of folds in distal attachment do not change in contrast to the indistinct central body and mostly absence of folds from samples that underwent a longer period of oxidization (24-48 hours and KOH 10'). The synonymization of Faunipollenites to Protohaploxypinus is confirmed. Species of Faunipollenites are reassigned to the revised species of Protohaploxypinus. The usage of the latter genus and its species in Permian biostratigraphic studies of India will improve Gondwanan correlations and paleobiogeographic reconstructions in future studies.
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