Papers by Julia Criscione
GSA Annual Meeting in Indianapolis, Indiana, USA - 2018, 2018
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Geological Society of America Abstracts with Programs
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Geological Society of America Abstracts with Programs
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AGU Fall Meeting Abstracts, Dec 1, 2020
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Geological Society of America Abstracts with Programs, 2020
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AGU Fall Meeting Abstracts, Dec 1, 2018
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Evolution is the process by which species change through time, and understanding the evolutionary... more Evolution is the process by which species change through time, and understanding the evolutionary processes that occur today allows us to infer the evolutionary history of organisms from the distant past. In this thesis, the evolutionary processes and adaptations of two distantly related organisms that inhabit different environments were studied. Chapter one investigated the size variation in pentaliths of Braarudosphaera bigelowii, a marine haptophyte that is abundant in the Lower Paleocene Zumaia section of northern Spain, and explored the idea that the variability in pentalith size represents pseudo-cryptic speciation. A cluster analysis in RStudio (mclust package) yielded two size groups, which were interpreted as two unique pseudo-cryptic species: form X (< 4.5 μm) and form Y (≥ 4.5 μm). In addition, a sudden increase in B. bigelowii abundance occurred near the Paleocene C27n/26r magnetic reversal and formed a "peak acme" zone of approximately four meters. Isotopic analyses of organic matter revealed that the onset of this acme coincided with an abrupt negative excursion (3.5‰) in δ13Corg. Biostratigraphic correlation between the Zumaia section and the Danian/Selandian boundary section at Qreiya, Egypt confirmed that this isotopic shift correlates with a hyperthermal event (Latest Danian Event), and suggests that changes in the climate may have affected the abundance of B. bigelowii at Zumaia. Chapter two described a new species of aquatic belostomatid insect, Triassonepa solensis, from the Upper Triassic, lacustrine Cow Branch Formation that outcrops along the Virginia/North Carolina border. It was placed in a new genus due to the unique structure of its raptorial foreleg, in which the tarsus is elongate and opposed to the tibia + femur. Due to the exclusive preservation of terrestrial adult insects and surface-dwelling aquatic insects, in addition to the geochemistry of the deposit, it is likely that the Cow Branch Formation was a saline, alkaline, rift valley lake.
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Museums at the Forefront of the History and Philosophy of Geology: History Made, History in the Making, 2018
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Marine Micropaleontology, 2017
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Journal of Paleontology, 2017
A new genus and species of predaceous water bugs,Triassonepa solensisn. gen. n. sp., is described... more A new genus and species of predaceous water bugs,Triassonepa solensisn. gen. n. sp., is described from the Triassic Cow Branch Formation of Virginia and North Carolina (USA) based on ~36 adult specimens and 51 nymphs. This species is the oldest known member of the extant family Belostomatidae. It is placed in a new genus based on the unique structure of the raptorial foreleg, in which the tarsus is elongate and opposed to the tibia + femur. The fossil record of this family is reviewed and the paleoenvironmental implications of the species assemblage preserved in the Cow Branch Formation are discussed.
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Systematic Entomology, 2015
The monophyletic family Zhangsolvidae comprises stout‐bodied brachyceran flies with a long probos... more The monophyletic family Zhangsolvidae comprises stout‐bodied brachyceran flies with a long proboscis and occurring only in the Cretaceous, originally known in shale from the Early Cretaceous Laiyang Formation (Fm.) in China (Zhangsolva Nagatomi & Yang), subsequently from limestones of the Early Cretaceous Crato Fm. of Brazil. Cratomyoides Wilkommen is synonymized with Cratomyia Mazzarolo & Amorim, both from the Crato Fm.; Cratomyiidae is synonymized with Zhangsolvidae. Two genera and three species of Zhangsolvidae are described: Buccinatormyia magnifica Arillo, Peñalver & Pérez‐de la Fuente, gen. et sp.n. and B. soplaensis Arillo, Peñalver & Pérez‐de la Fuente, sp.n., in Albian amber from Las Peñosas Fm. in Spain; and Linguatormyia teletacta Grimaldi, gen. et sp.n., in Upper Albian–Lower Cenomanian amber from Hukawng Valley in Myanmar. Buccinatormyia soplaensis and Linguatormyia teletacta are unique among all Brachycera, extant or extinct, by their remarkably long, flagellate antenn...
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Papers by Julia Criscione