A
Alexandr P. Rasnitsyn
Researcher at Russian Academy of Sciences
Publications - 236
Citations - 5838
Alexandr P. Rasnitsyn is an academic researcher from Russian Academy of Sciences. The author has contributed to research in topics: Genus & Yixian Formation. The author has an hindex of 31, co-authored 218 publications receiving 5221 citations. Previous affiliations of Alexandr P. Rasnitsyn include American Museum of Natural History & Natural History Museum.
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Journal ArticleDOI
A Total-Evidence Approach to Dating with Fossils, Applied to the Early Radiation of the Hymenoptera
Fredrik Ronquist,Seraina Klopfstein,Lars Vilhelmsen,Susanne Schulmeister,Debra Murray,Alexandr P. Rasnitsyn +5 more
TL;DR: The results suggest that the crown group dates back to the Carboniferous, ∼309 Ma (95% interval: 291--347 Ma), and diversified into major extant lineages much earlier than previously thought, well before the Triassic.
BookDOI
History of Insects
TL;DR: This work aims to provide a history of insect fossils dating back to the Carboniferous period through to the present day with a focus on the period from 1758 to 1800.
Journal ArticleDOI
A Probable Pollination Mode Before Angiosperms: Eurasian, Long-Proboscid Scorpionflies
Dong Ren,Conrad C. Labandeira,Conrad C. Labandeira,Jorge A. Santiago-Blay,Jorge A. Santiago-Blay,Alexandr P. Rasnitsyn,Alexandr P. Rasnitsyn,Chungkun Shih,Alexei S. Bashkuev,M. Amelia V. Logan,Carol L. Hotton,Carol L. Hotton,David L. Dilcher,David L. Dilcher +13 more
TL;DR: The presence of scorpionfly taxa suggests that siphonate proboscides fed on gymnosperm pollination drops and likely engaged in pollination mutualisms with gymnosperms during the mid-Mesozoic, long before the similar and independent coevolution of nectar-feeding flies, moths, and beetles on angiosperms.
Journal ArticleDOI
Phylogeny of the Hymenoptera: a cladistic reanalysis of Rasnitsyn’s (1988) data
TL;DR: A character matrix for fossil and recent hymenopterans is derived and it is shown that there is little support for Rasnitsyn’s biphyletic hypothesis, postulating a sister‐group relationship between tenthredinoids and macroxyelines, and the data favour the conventional view that Hymenoptera excluding the Xyelidae are monophyletic.
A comparative analysis of the Baltic and Rovno amber arthropod faunas: representative samples
TL;DR: It is concluded that the proposal for the Ypresian‐Lutetian age of Baltic amber contradicts a wide array of the palaeontological, radiological, and stratigraphic data and thus cannot be accepted on the basis of available evidence.