Petrofilaments in palynological preparations.

Area of Science:

• Palynology
• Organic geochemistry
• Microscopy
• Paleontology

Background:

• Palynological laboratory processing can generate microscopic artifacts.
• These artifacts may superficially resemble natural microstructures like secondary wall thickenings and elaters.
• Accurate identification of microfossils is crucial for paleontological and paleoenvironmental studies.

Purpose of the Study:

• To identify and illustrate microscopic structures, termed petrofilaments, that arise during palynological processing.
• To differentiate these artifacts from genuine fossilized remains.
• To prevent misinterpretation of asphaltene-derived structures as microfossils in scientific literature.

Main Methods:

• Observation of microscopic structures formed during standard palynological laboratory processing.
• Analysis of the chemical composition of the angular bodies forming the filaments (hydrocarbons, specifically asphaltenes).
• Microscopic imaging and illustration of the petrofilaments and their precursor bodies.

Main Results:

• Microscopic structures, named petrofilaments, were observed to form from angular bodies during palynological processing.
• These angular bodies were identified as asphaltenes, a type of hydrocarbon.
• Petrofilaments extrude when asphaltenes react with solvents in the mounting medium, mimicking fossil structures.

Conclusions:

• Petrofilaments are laboratory-induced artifacts, not biological microfossils.
• Asphaltene bodies are the source of these artifacts, forming filaments under specific processing conditions.
• Illustration of these structures is vital for accurate palynological analysis and avoiding misidentification of fossils.