Lithostratigraphic context for Kln-1993.05-SNJ, a fossil colobine maxilla from Jokotingkir, Sangiran Dome

摘要: Jablonski and Tyler (1999) announced a new subspecies of colobine monkey based on fossil partial maxilla from the Sangiran dome. The specimen is easily assigned to living leaf species—most extant Southeast Asian catarrhines differ only subspecifically their Middle Pleistocene earliest local ancestors. Yet reported an improbable provenance for specimen; mass-flow volcanic breccia generally considered late Pliocene in age. We show that Lower Lahar was laid down amidst range paludal habitats its deposition predates appearance all-but-now extinct, water-tolerant mammals emergent Java. No other catarrhine has been ascribed Lahar, not even hominins, which are most gregarious members group. More probable lies upper or lower Bapang formations. Either alternative would associate with fossils more tenable environments. also unravel errors inconsistencies contextual report discussion dome geochronology. various radiometric, paleomagnetic, paleontologic studies cited discordance about 300 Ka (thousand years) across lithostratigraphic sequence. Plio-Pleistocene biogeographic hypotheses Java must work short long chronologies.