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Article Reference New specimens of the early Eocene bird Vastanavis and the interrelationships of stemgroup Psittaciformes
We describe new skeletal elements of Vastanavis from the early Eocene Cambay Shale Formation of western India, including a small coracoid that represents an unnamed new species, and comment on the relationships between this avian taxon and the recently described Avolatavis from the early Eocene Green River Formation in North America. Like the previously described ones, the new Vastanavis bones resemble those of the late Eocene Quercypsittidae, thus strengthening psittaciform affinities of the Indian taxon. Vastanavis differs from Avolatavis in the presence of a crista medianoplantaris on the tarsometatarsus and in claw morphology, but a fossil from the early Eocene London Clay, which was previously assigned to Vastanavidae, closely resembles Avolatavis in these features and all other osteological aspects. We show that most branches in a recent phylogeny of stem group Psittaciformes collapse after modification of a single erroneous character scoring for Vastanavis. We further describe a morphologically distinctive distal humerus of a small bird resembling the stem group nyctibiid Paraprefica, which was discovered in the most recent excavation in Vastan Lignite Mine.
Located in Library / RBINS Staff Publications
Article Reference High diversity of acrodontan lizards in the Early Eocene Vastan Lignite Mine of India
The Ypresian Cambay Formation at Vastan Mine in Gujarat, western India, has yielded a rich herpetological fauna including snakes, lizards and amphibians, but strangely, lizards are only represented by Acrodonta. Here we describe the acrodontan assemblage based on numerous, diverse and well-preserved dentaries, premaxillae, and maxillae. Among the five taxa described one new genus and species characterised by a short splenial represents the youngest occurrence of the extinct family Priscagamidae. The other four taxa belong to the extant family Agamidae. Two of them previously known, Vastanagama susanae and Tinosaurus indicus, are here revised. The two other taxa are new. The first one, Suratagama neeraae gen. and sp. nov., is characterised by the presence of six small pleurodont teeth with a nearly cylindrical shaft and an obtusely pointed apex. The second one, Indiagama gujarata gen. and sp. nov., has rectangular teeth in lateral view, unicuspid crowns forming a nearly horizontal cutting edge, and wear facets on both the lingual and labial sides of the dentary. Our results confirm that Acrodonta is the only lizard group present in Vastan, whereas many other groups are already present from the beginning of the Early Eocene on the other continents. The diversity of the agamids in Vastan and the absence of non-acrodontan lizard in India tentatively support the Out-of-India hypothesis for agamids.
Located in Library / RBINS Staff Publications
Article Reference Encounter competition partly explains the segregation of the sandy beach amphipods Bathyporeia pilosa and Bathyporeia sarsi. A mecocosm experiment.
Located in Library / RBINS Staff Publications
Article Reference The role of structuring benthos for juvenile flatfish.
Located in Library / RBINS Staff Publications
Article Reference Monitoring and evaluation of spatially managed areas: A generic framework for implementation of ecosystem based marine management and its application.
Located in Library / RBINS Staff Publications
Article Reference The Grey Seal (Halichoerus grypus) as a Predator of Harbour Porpoises (Phocoena phocoena)?
Located in Library / RBINS Staff Publications
Article Reference Diurnal variability of turbidity and light attenuation in the southern North Sea from the SEVIRI geostationary sensor.
Located in Library / RBINS Staff Publications
Article Reference In situ evidence of non-zero reflectance in the OLCI 1020 nm band for a turbid estuary.
Located in Library / RBINS Staff Publications
Article Reference Influence of suspended particle concentration, composition and size on the variability of inherent optical properties of the Southern North Sea.
Located in Library / RBINS Staff Publications
Article Reference Suggested guidelines for invasive sampling of hominid remains
Located in Library / RBINS Staff Publications