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.
- Received September 1, 1994.
- Accepted November 1, 1995.
- © 1997 The Micropalaeontological Society