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Language Spanish journal of palaeontology. 2021. Vol. 36, no. 1
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- Tafonomía actualística de huesos de anfibios predados por Strigiformes del centro de Argentina. Contribuciones para estudios paleontológicos y arqueológicos(2021) Mignino, JuliánSe presenta un análisis tafonómico comparativo de restos de anfibios recuperados en egagrópilas de aves rapaces Strigifomes provenientes del centro de Argentina, en la provincia de Córdoba: Tyto furcata, Megascops choliba y Athene cunicularia. El estudio se basó en el promedio de abundancia relativa de elementos anatómicos, índices de representatividad de partes esqueletales y se evalúo fracturación y digestión. Los resultados derivados del análisis de representatividad y abundancia anatómica revelaron promedios elevados de abundancia relativa en todos los casos. Los grados de fractura y digestión fueron evaluados como leves para T. furcata, leves-moderados para M. choliba y moderados para A. cunicularia. En general, estas evaluaciones coinciden con las referencias previas. Sin embargo, se detectaron variaciones en los patrones de fracturación y digestión. Los datos presentados aportan información como análogos modernos para evaluar la presencia de esta clase de restos en contextos arqueológicos y paleontológicos.
- A peculiar fusuline assemblage from the Tanes locality, Campo de Caso section (Pennsylvanian, Upper Moscovian; Cantabrian Zone, Spain)(2021) Villa, Elisa; Ueno, Katsumi; Merino-Tomé, Oscar; Martín-Llaneza, JaimeThe Campo de Caso section (eastern part of the Cantabrian Zone, NW Spain) exposes a middle to upper Moscovian (Middle Pennsylvanian) succession, up to 3500-m thick, consisting of marine shelfal and deltaic siliciclastic and shale deposits with numerous intercalated fossiliferous limestones. A limestone outcropping in the upper part of this section, close to the village of Tanes, has yielded a fusuline assemblage composed of species of the genera Eostaffella, Pseudonovella, Ozawainella, Pseudostaffella, Neostaffella, Schubertella, Fusiella, Taitzehoella, Fusulinella, Beedeinaand Putrella. The specific composition of these genera, considered as a whole, indicates an early to mid- Myachkovian age; however, some of the taxa exhibit rare aspects, among which are the occurrence of pseudostaffellids having a “primitive” appearance recalling that of the Bashkirian Pseudostaffella, and a Putrella species exhibiting a wall that, at first glance, resembles the schwagerinid wall. Data gathered during this study question the validity of the genus Quasistaffella Solovieva 1986 and point to consider it as a junior synonymous of Pseudostaffella Thompson 1942.
- Palaeohistology and palaeopatology of an Aeolosaurini (Sauropoda: Titanosauria) from Morro do Cambambe (Upper Cretaceous, Brazil)(2021) Brum, Arthur S.; Bandeira, Kamila L. N. ; Holgado, Borja; Souza, Lucy G. ; Pegas, Rodrigo V. ; Sayao, Juliana M. ; Campos, Diogenes A. ; Kellner, AlexanderA recent publication of fossil bones of titanosaurs assigned to Aeolosaurini from the Morro do Cambambe site (Mato Grosso state, Brazil, Upper Cretaceous) reported anomalous growth in some of them. Here, we present osteohistological sections of elements to understand not only the microstructure and growth of such bones, but also the nature of those anomalies. The primary bone of all specimens consisted of a variation of the fibrolamellar complex, with the inner cortex being rich in woven bone with dispersed longitudinal canals, while the outer cortex was parallel-fibred with rows of longitudinal canals, interlayered by Lines of Arrested Growth (LAGs). We identified a maximum of two LAGs in the cervical rib and haemal arch, and four in the dorsal rib. The haemal arch shows an External Fundamental System (EFS) in most sections. The advanced remodelling and variation of the fibrolamellar bone in the cortex suggests that all the specimens represent individuals that reached sexual maturity. However, the haemal arch was distinct due to the wide distribution of EFS. The dorsal rib exhibited periosteal and endosteal outgrowth. Such microstructure was assigned to a reactive bone due to an intra-thoracic infection (a pneumonia, probably related to a tuberculosis), which is the first report in a non-avian dinosaur. The microstructure resembles the medullary bone recovered in dinosaurs, which suggests that further studies of medullary bone in thoracic bones should also regard the pathological cases.
- El Sinemuriense superior: cronozonas Obtusum y Oxynotum en Asturias, España. Ammonoideos y correlación con otras cuencas del oeste de Europa(2021) COMAS-RENGIFO, María José; GOY, Antonio; PIÑUELA, Laura; GARCÍA-RAMOS, José Carlos; SUÁREZ VEGA, Luis Carlos; PAREDES, RicardoSe estudia la cronoestratigrafía, biosedimentación y, en particular, la sucesión de los ammonoideos que, con un registro relativamente pobre, se encuentra en varias secciones del Sinemuriense superior (cronozonas Obtusum y Oxynotum) de la costa de Asturias, entre la Playa de Peñarrubia (Gijón) y la Playa de Vega (Ribadesella). Si se exceptúa el límite inferior de la cronozona Obtusum, todas las unidades cronoestratigráficas han podido ser caracterizadas con bastante precisión. En la cronozona Obtusum (subcronozonas Obtusum y Stellare) se suceden en el tiempo siete especies de Asteroceras (A. aff. confusum-A. confusum-A. obtusum-A. cf. margaritoides-A. stellare-A. blakei) y Aegasteroceras (A. sagittarium), que de forma puntual pueden estar asociadas a escasos Epophioceras, Xipheroceras, Promicroceras y Cymbites. La subcronozona Denotatus se caracteriza por la sucesión de tres especies de Eparietites (E. undaries-E. impendens-E. glaber) asociadas a raros Promicroceras. En la cronozona Oxynotum se registran Palaeoechioceras, Gagaticeras (G. cf. exortum-G. gagateum) y Oxynoticeras (O. simpsoni) en la subcronozona Simpsoni y Oxynoticeras (O. oxynotum) asociado a Cheltonia (C. accipitris) en la subcronozona Oxynotum. En la parte media y superior de esta subcronozona, se registran asimismo escasos Paroxynoticeras y escasos Bifericeras y Gleviceras. En el aspecto paleobiogeográfico, la sucesión obtenida es típica de la Provincia del NO Europeo con la inclusión de algunos elementos más propios de la Provincia Mediterránea en la parte media y superior de la cronozona Obtusum (Asteroceras cf. suevicum, E. glaber) y en la parte media de la cronozona Oxynotum (Paroxynoticeras salisburgense).
- Small vertebrates from a Holocene gravelly deposit at El Salt (Alcoi, Alicante)(2021) Fagoaga, Ana; Marquina-Blasco, Rafael; Gracia-Monferrer, Daniel; Martínez Ortí, Alberto; Vidal-Matutano, Paloma; Sánchez López, Laura; Mallol, Carolina; M. Hernández, Cristo; Galván, Bertila; Bailon, Salvador; Ruiz Sánchez, Francisco Javier; Laplana, CésarThe small-vertebrates’ assemblage recovered comes from Units I to IV from El Salt site (Alcoi, Spain). The sample is composed by nearly 310 remains, and includes one toad (Epidalea calamita), two lizards (Lacertidae indet. and Chalcides cf. bedriagai), two snakes (Coronella cf. girondica and cf. Coronella sp.), two insectivores (Crocidura sp. and Sorex sp.), one lagomorph (Oryctolagus cuniculus) and seven rodent taxa (Arvicola sapidus, Microtus sp., M. arvalis, M. cabrerae, M. duodecimcostatus, Apodemus sylvaticus, and Eliomys quercinus). All the species described in the present work are consistent with a Late Pleistocene-Holocene chronology. The presence of M. cabrerae (absent in the Middle Pleistocene) and M. duodecimcostatus (absent in the Mediterranean until the Late Pleistocene) seem to confirm this age. The presence of Neolithic pottery and M. arvalis in the same deposit is inconsistent from a biochronically point of view since this species was extirpated from this region at the end of the Late Pleistocene. Several taphonomic alterations related to transport within the small mammal remains have been identified. Further taphonomical and geoarchaeological work is needed to clarify the provenience of the studied faunal assemblages, which, given the high energy, erosional morphology and lithology of the sedimentary deposit, could have been reworked in a more recent time period.
- Xanastur (Brachiopoda, Stringocephalacea) nomen novum pro Xana García-Alcalde, 1972 (non Xana Kurdjumov, 1917, Hymenoptera, Hexapoda)(2021) GARCÍA-ALCALDE, Jenaro L.García-Alcalde (1972) proposed the new genus Xana (type species Xana bubo García-Alcalde, 1972) for a terebratulid brachiopod included in the superfamily Stringocephalacea from the Lower Devonian of the Cantabrian Mountains (Northwestern Spain). In an email message sent on April 3, 2018, the entomologist Dr. Eduardo I. Faundez, from the Patagonia Institute, Magallanes University, Chile, warned the author that Xana was a name previously used by Kurdjumov (1917) for a hymenopteran genus. Xana García-Alcalde, 1972 would be so a later homonym of Xana Kurdjumov, 1917. In accordance with articles 52.3, 52.4, 53.2, 60.3 of the International Code of Zoological Nomenclature (ICZN) (2000), it is proposed here to replace the invalid name with the new name Xanastur.
