Significance of ultrastructural features in etched conodonts

Autor:	Richard D. Burnett, Jack C. Hall
Rok vydání:	1992
Předmět:	Materials science Acid etching Scanning electron microscope education Paleontology Mineralogy Apatite Lamella (surface anatomy) Etching (microfabrication) visual_art Ultrastructure visual_art.visual_art_medium Crystallite Composite material Biomineralization
Zdroj:	Journal of Paleontology. 66:266-276
ISSN:	1937-2337 0022-3360
DOI:	10.1017/s0022336000033783
Popis:	Acid etching combined with scanning electron microscopy (S.E.M.) accentuates a variety of conodont microstructural patterns as compared to unetched specimens. External and internal organic layers surrounding apatitic lamellae are found with internal organic layers apparently thinner than their external counterparts. This may imply partial removal of the outermost organic layer prior to secretion of the next lamella. Etching also provides evidence of internally preserved striate ornament. Polygonal etch artifacts and zones of crystallites aligned in small areas are interpreted as possible sites for apatite biomineralization. ABSTRACT--Acid etching combined with scanning electron microscopy (S.E.M.) accentuates a variety of conodont microstructural patterns as compared to unetched specimens. External and internal organic layers surrounding apatitic lamellae are found with internal organic layers apparently thinner than their external counterparts. This may imply partial removal of the outermost organic layer prior to secretion of the next lamella. Etching also provides evidence of internally preserved striate ornament. Polygonal etch artifacts and zones of crystallites aligned in small areas are interpreted as possible sites for apatite biomineralization.
Databáze:	OpenAIRE
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