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Article Reference A basal thunnosaurian from Iraq reveals disparate phylogenetic origins for Cretaceous ichthyosaurs
Cretaceous ichthyosaurs have typically been considered a small, homogeneous assemblage sharing a common Late Jurassic ancestor. Their low diversity and disparity have been interpreted as indicative of a decline leading to their Cenomanian extinction. We describe the first post-Triassic ichthyosaur from the Middle East, Malawania anachronus gen. et sp. nov. from the Early Cretaceous of Iraq, and re-evaluate the evolutionary history of parvipelvian ichthyosaurs via phylogenetic and cladogenesis rate analyses. Malawania represents a basal grade in thunnosaurian evolution that arose during a major Late Triassic radiation event and was previously thought to have gone extinct during the Early Jurassic. Its pectoral morphology appears surprisingly archaic, retaining a forefin architecture similar to that of its Early Jurassic relatives. After the initial latest Triassic radiation of early thunnosaurians, two subsequent large radiations produced lineages with Cretaceous representatives, but the radiation events themselves are pre-Cretaceous. Cretaceous ichthyosaurs therefore include distantly related lineages, with contrasting evolutionary histories, and appear more diverse and disparate than previously supposed.
Located in Library / RBINS Staff Publications
Article Reference A behavioural framework for the evolution of feeding in predatory aquatic mammals
Located in Library / RBINS Staff Publications 2017
Article Reference A case study on the growth of Lanice conchilega (Pallas, 1766) aggregations and their ecosystem engineering impact on sedimentary processes
Located in Library / RBINS Staff Publications 2017
Article Reference A century of coping with environmental and ecological changes via compensatory biomineralization in mussels
Located in Library / RBINS Staff Publications 2021
Article Reference A challenge for changes
Located in Library / RBINS Staff Publications
Article Reference A checklist of Lecithoceridae (Lepidoptera: Gelechioidea) of the Afrotropical Region
Located in Library / RBINS Staff Publications 2021
Article Reference A checklist of the freshwater rotifer fauna of Thailand (Rotifera, Monogononta, Bdelloidea)
Located in Library / RBINS Staff Publications
Article Reference A chlorophyll-retrieval algorithm for satellite imagery (Medium Resolution Imaging Spectrometer) of inland and coastal waters
Located in Library / RBINS Staff Publications
Article Reference A classic Late Frasnian chondrychtyan assemblage from southern Belgium
Located in Library / RBINS Staff Publications 2017
Article Reference A classic Late Frasnian chondrichthyan assemblage from southern Belgium
Samples from the Upper Frasnian (Devonian) of Lompret Quarry and Nismes railway section in Dinant Synclinorium, southern Belgium, yielded several chondrichthyan teeth and scales. The teeth belong to three genera: Phoebodus, Cladodoides and Protacrodus. The comparison with selected Late Frasnian chondrichthyan assemblages from the seas between Laurussia and Gondwana revealed substantial local differences of taxonomic composition due to palaeoenvironmental conditions, such as depth, distance to submarine platforms, oxygenation of water, and possibly also temperature. The assemblage from Belgium, with its high frequency of phoebodonts, is the most similar to that from the Ryauzyak section, South Urals, Russia, and the Horse Spring section, Canning Basin, Australia.
Located in Library / RBINS Staff Publications 2017