1997/05/01 by Zhang Shunxin, Richard J. Aldridge, Philip C. J. Donoghue · 3 citations
Earth and Planetary Sciences · #Evolution and Paleontology Studies #Paleontology and Evolutionary Biology #Paleontology and Stratigraphy of Fossils
paper · pdf · doi:10.1144/jm.16.1.65
openalex publication_date 1997/05/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/11
Abstract. Elements of a new Triassic conodont genus Parapachycladina, from the Lower Triassic Beisi Formation of western Guangxi Province, China, show a characteristic pattern of lamellar edges in the recessive basal margin. The lamellae are grouped in sets of 8–10, with broad interlamellar spaces between each set. If this apparent periodicity reflects annual cycles, the specimens were not more than four years old when they ceased growing.