巴西圣保罗特雷门贝地层(陶巴特盆地渐新世)鸟类的原生动物寄生虫

IF 1.3 3区 地球科学 Q3 PALEONTOLOGY International Journal of Paleopathology Pub Date : 2024-04-23 DOI:10.1016/j.ijpp.2024.04.003
Gustavo Macêdo Do Carmo , Bruno Pereira Berto , Felipe Bisaggio Pereira , Sueli De Souza Lima , Hermínio Ismael De Araújo-Júnior , Ralph Maturano Pinheiro
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引用次数: 0

摘要

目的分析特雷门贝地层(陶巴特盆地渐新世)鸟类桡骨岩中的原生动物寄生虫。方法将样本重新水化并进行自发沉积。结果淡色寄生虫学分析发现了与埃米里科(Apicomplexa)兼容的卵囊和一个阿米巴虫(Amoezoa)囊蚴。结论本研究工作增加了有关感染在整个新生代传播的信息量,并揭示了巴西古鸟类在喙螨科和变形虫的生命周期中发挥了重要作用。这些发现有助于解释现代鸟类球虫寄生虫的系统发育,因为在目前的分子系统发育分析中,在渐新世原生动物中观察到的某些分类特征具有单系群的特征。对进一步研究的建议我们的研究结果为所述寄生虫类群的生物地理学研究提供了新的视角,并可加深对原生动物与鸟类之间寄生虫进化关系的时间幅度的理解。
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Protozoan parasites of birds from the Tremembé formation (Oligocene of the Taubaté Basin), São Paulo, Brazil

Objective

To analyze the presence of protozoan parasites in bird coprolites from the Tremembé Formation (Oligocene of the Taubaté Basin).

Materials

Twenty avian coprolites embedded in pyrobituminous shale matrices.

Methods

Samples were rehydrated and subjected to spontaneous sedimentation.

Results

Paleoparasitological analyses revealed oocysts compatible with the Eimeriidae family (Apicomplexa) and one single Archamoebae (Amoebozoa) cyst.

Conclusions

The present work increases the amount of information about the spread of infections throughout the Cenozoic Era and reveals that the Brazilian paleoavifauna played an important role in the Apicomplexa and Amoebozoa life cycles.

Significance

This is the first record of protozoans in avian coprolites from the Oligocene of Brazil. These findings can help in the interpretation of phylogenies of coccidian parasites of modern birds, as certain taxonomic characters observed in the Oligocene Protozoa characterize monophyletic groups in current molecular phylogenetic analyses.

Limitations

None of the oocysts were sporulated; therefore, it is not possible to identify the morphotypes to genus or species.

Suggestions for further research

Our results create new perspectives related to biogeographic studies of the parasitic groups described and may improve the understanding of the temporal amplitude of parasitic evolutionary relationships between Protozoans and birds.

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来源期刊
CiteScore
2.90
自引率
25.00%
发文量
43
期刊介绍: Paleopathology is the study and application of methods and techniques for investigating diseases and related conditions from skeletal and soft tissue remains. The International Journal of Paleopathology (IJPP) will publish original and significant articles on human and animal (including hominids) disease, based upon the study of physical remains, including osseous, dental, and preserved soft tissues at a range of methodological levels, from direct observation to molecular, chemical, histological and radiographic analysis. Discussion of ways in which these methods can be applied to the reconstruction of health, disease and life histories in the past is central to the discipline, so the journal would also encourage papers covering interpretive and theoretical issues, and those that place the study of disease at the centre of a bioarchaeological or biocultural approach. Papers dealing with historical evidence relating to disease in the past (rather than history of medicine) will also be published. The journal will also accept significant studies that applied previously developed techniques to new materials, setting the research in the context of current debates on past human and animal health.
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