UPPER TRIASSIC (NORIAN-RHAETIAN) VARIOSTOMATIDS (FORAMINIFERA), TIMOR-LESTE: SYSTEMATICS, PALEOENVIRONMENTAL, AND BIOSTRATIGRAPHIC IMPLICATIONS
Journal: The Journal of Foraminiferal Research
Year: 2025

ABSTRACT Variostomatids from Late Triassic basinal facies in Timor-Leste include a new genus, Pualacana n. gen. with P. hortai n. sp. as type species. It is separated from Variostoma Kristan-Tollmann by absence of the large spinose projections on chambers that characterize V. spinosum Kristan-Tollmann, type species of Variostoma, and from duostominids by having the umbilicus covered by overlap of final chambers and by a twisted chamber arrangement about a slightly variable test axis. Pualacana i