Abstract The sedimentary basins in the Continental Rift of Southeastern Brazil (CRSB) provide an opportunity for ichnological analyses due to its well-known facies relationships and paleoenvironmental interpretations. This study reports invertebrate trace fossils from the Neogene fluvial deposits (Floriano Formation) and applies integrated ichnological and facies analyses to reconstruct the environmental conditions recorded in this lithostratigraphic unit. Fieldworks revealed a rich ichnofauna in the Floriano Formation, whose facies associations have been interpreted as indicative of meandering river environments. Four sedimentary facies were identified, including bioturbated sandstone, horizontally stratified sandstone, laminated sandstone, and mudstone. Six ichnogenera were identified, Arenicolites, Beaconites, Camborygma, Palaeophycus, Skolithos, and Taenidium. Those ichnogenera occur as Skolithos, Taenidium, and Beaconites ichnocoenoses. The Skolithos ichnocoenosis is primarily represented within sand bar deposits, indicating arthropod colonization in abandoned channels. The Taenidium ichnocoenosis, which is observed within mudstone layers and presents Camborygma burrows, suggests transitional environments between aquatic and subaerial conditions, locally with high water table levels. The Beaconites ichnocoenosis indicates changes in substrate consistency associated with progressive desiccation and extended exposure time. Therefore, the identified ichnocoenoses, combined with the analysis of physical sedimentary structures, suggest generally humid conditions during colonization by invertebrates of the meandering river deposits of the Floriano Formation. CRSB (CRSB wellknown well known interpretations Formation unit sandstone Arenicolites Palaeophycus ichnocoenoses channels burrows levels time Therefore structures

ABSTRACT: Studies that integrate ichnologic, taphonomic and sedimentologic data result in more accurate paleoenvironmental inferences than isolated approaches. Most of paleontological studies regarding Devonian from Paraná Basin were conducted in the southern part of the basin (Paraná state), precluding taphonomic or ichnologic studies to the northern part, and even its macrofossils content is understudied. This study analyzes paleoecologic and depositional conditions represented by trace fossils, macrofossils and sedimentary facies in a regressive Devonian section from Paraná Basin, Mato Grosso do Sul state, Brazil. Seven ichnofabrics (Macaronichnus, Psammichnites, Arenicolites-Skolithos, Cylindrichnus-Skolithos, Zoophycos, Rhizocorallium-Palaeophycus, and Chondrites ichnofabrics) and three taphofacies (T1: parautochthonous to allochthonous preservation; T2: Autochthonous preservation; and T3: time-averaged autochthonous to allochthonous association) were diagnosed. The studied sections are positioned in a highstand systems tract (HST) exhibiting dominance of sandy facies, and four sub-environments were defined: foreshore; shoreface; storm-dominated shoreface to transitional offshore; and offshore. The dominance of foreshore to shoreface settings in a HST corroborates a shallower context in relation to the southern part. However, similarities in the facies and ichnofacies stacking, as well in the macrofossil content suggest that the hypothetical division between two sub-basins (Apucarana and Alto Garças Sub-basins) was not complete until early Emsian.

Apesar do incentivo e do investimento na produção de frutas no estado do Paraná, pouca informação está disponível sobre as moscas-das-frutas, uma das principais pragas da fruticultura. O presente trabalho teve os objetivos de registrar pela primeira vez a fauna de tefritídeos, na região de Ponta Grossa, e caracterizar a sua comunidade por meio de diferentes índices faunísticos. Adultos de tefritídeos foram coletados por meio de frascos caça-moscas com atrativos alimentares em quatro pomares de agosto a dezembro de 2009. Foi coletado um total de 2.428 tefritídeos distribuídos em sete espécies: Anastrepha fraterculus Wiedemann, Anastrepha montei Lima, Anastrepha pseudoparallela Loew, Anastrepha sororcula Zucchi, Ceratitis capitata Wiedemann, Rhagoletis sp. Loew e Hexachaeta sp. Loew. A. fraterculus foi a única espécie comum aos quatro pomares, ocorrendo com frequência acima de 80%. Este é o primeiro registro de A. montei no Paraná. A. fraterculus, A. sororcula e C. capitata apresentaram os maiores índices de frequência, abundância, dominância e constância, sendo, portanto, consideradas espécies predominantes. O maior índice de diversidade (H'=0,4360) ocorreu no pomar 2, diferindo significativamente dos demais pomares (teste t, P<0,05). Os valores do índice de Margalef foram baixos (próximos ou inferiores a 0,5), confirmando haver predominância de espécies. Quanto à similaridade de espécies entre os pomares, determinada pelo coeficiente de Jaccard e índice de Bray-Curtis, o pomar 4, onde ocorreram apenas duas espécies (96% de A. fraterculus e 4% de A. pseudoparallela) forma um agrupamento distinto dos demais pomares amostrados, no qual ocorreram quatro espécies de tefritídeos.

In spite of encouragement and investment in fruit production in the state of Paraná, little information is available on the fruit flies, a major pest in fruit growing. The present study had the objective of recording for the first time the tephritid fauna in the region of Ponta Grossa, and characterize the insect community through different faunal indices. Adult tephritids were collected by means of flapper bottles with food baits in four orchards from August to December 2009. A total of 2,428 tephritids distributed in seven species were collected: Anastrepha fraterculus Wiedemann, Anastrepha montei Lima, Anastrepha pseudoparallela Loew, Anastrepha sororcula Zucchi, Ceratitis capitata Wiedemann, Rhagoletis sp. Loew and Hexachaeta sp. Loew. A. A. fraterculus was the only species common to the four orchards, occurring in a frequency higher than 80%. This is the first record of A. montei in the state of Paraná. A. fraterculus, A. sororcula and C. capitata had the highest frequency, abundance, dominance and constancy, and are therefore considered predominant species. The highest diversity index (H'=0.4360) occurred in the orchard 2, differing significantly from all orchards (t test, P<0.05). The Margalef index values were low (close to or below 0.5) confirming that there are predominant species. Regarding the similarity of species between the orchards, that was determined by the coefficient of Jaccard and the Bray-Curtius index, the orchard 4, where occurred only two species (96% of A. fraterculus and 4% of A. pseudoparallela), forms a distinct group from other orchard sampled, where there were four species of Tephritidae.