Title: Palynology and palaeobotany in the reconstruction of landscape units from the Candiota coalfield, Permian of Paraná Basin, Brazil
Abstract:MAECURU AND ERERÊ FORMATIONS (DEVONIAN), AMAZON BASIN, BRAZIL.Eight of the 14 trilobite species identified in deposits of the Maecuru and Ererê formations (Middle Devonian, Amazonas basin, Pará State,...MAECURU AND ERERÊ FORMATIONS (DEVONIAN), AMAZON BASIN, BRAZIL.Eight of the 14 trilobite species identified in deposits of the Maecuru and Ererê formations (Middle Devonian, Amazonas basin, Pará State, Brazil) were submitted to a functional analysis and were grouped into three morphotypes.Morphotype I presents a flattened profile, a slightly inflated cephalon with a large preglabellar shovel-shaped area, glabella, frontal and lateral glabellar lobes slightly inflated, shallow glabellar furrows and small eyes.The morphotype II is characterized by a moderately inflated cephalon, which may present a small median frontal process; glabella moderately inflated, glabellar frontal lobe moderately inflated and anteriorly expanded; glabellar lateral lobes moderately inflated and deeper glabellar furrows; half-rings well developed, a fixed conterminant hypostome and medium to large sized eyes.The morphotype III presents strongly inflated glabela and glabelar frontal lobes, glabellar lateral lobes moderately inflated, glabellar furrows moderately shallow and eyes ranging from medium to large sizes.All the species show predator/scavenger feeding habits.Species of the morphotypes I and II have a predominantly epibenthic mode of life, presenting adaptations to burrowing.Such adaptations were probably either used for feeding or protection.The well-developed stomach cavity in the trilobites referred to the morphotype III suggests they had been more voracious predators than those belonging to the other morphotypes.Read More