A5040088615- Ichthyology and Marine Biology
- Paleontology and Evolutionary Biology
- Marine animal studies overview
- Paleontology and Stratigraphy of Fossils
- Geology and Paleoclimatology Research
- Isotope Analysis in Ecology
- Fish Ecology and Management Studies
- Geological formations and processes
- Marine and fisheries research
- Marine and environmental studies
- Fish Biology and Ecology Studies
- Turtle Biology and Conservation
- Marine Biology and Ecology Research
- Fish biology, ecology, and behavior
- Archaeology and Natural History
- Mercury impact and mitigation studies
- Geological Studies and Exploration
- Geological Modeling and Analysis
- Botany, Ecology, and Taxonomy Studies
- Bone Tissue Engineering Materials
- Geochemistry and Geologic Mapping
- Linguistics and Cultural Studies
- Metallurgy and Cultural Artifacts
- Maritime and Coastal Archaeology
- Hydrocarbon exploration and reservoir analysis
Florida Gulf Coast University
2022-2025
Bergen Community College
2021-2022
Fairleigh Dickinson University
2022
Caldwell University
2021
William Paterson University
2018-2019
The Graduate Center, CUNY
2016-2018
City University of New York
2016-2017
Diet is a crucial trait of an animal's lifestyle and ecology. The trophic level organism indicates its functional position within ecosystem holds significance for ecology evolution. Here, we demonstrate the use zinc isotopes (δ66Zn) to geochemically assess in diverse extant extinct sharks, including Neogene megatooth shark (Otodus megalodon) great white (Carcharodon carcharias). We reveal that dietary δ66Zn signatures are preserved fossil tooth enameloid over deep geologic time robust...
Trophic position is a fundamental characteristic of animals, yet it unknown in many extinct species. In this study, we ground-truth the 15N/14N ratio enameloid-bound organic matter (δ15NEB) as trophic level proxy by comparison to dentin collagen δ15N and apply method fossil record reconstruct megatooth sharks (genus Otodus). These evolved Cenozoic, culminating Otodus megalodon, shark with maximum body size more than 15 m, which went 3.5 million years ago. Very high δ15NEB values (22.9 ±...
The evolution of the extinct megatooth shark, Otodus megalodon, and its close phylogenetic relatives remains enigmatic. A central question persists regarding thermophysiological origins these large predatory sharks through geologic time, including whether O. megalodon was ectothermic or endothermic (including regional endothermy), thermophysiology could help to explain iconic shark's gigantism eventual demise during Pliocene. To address uncertainties, we present unique geochemical evidence...
Otodus megalodon (Lamniformes: Otodontidae) is an iconic Neogene shark, but the lack of well-preserved skeletons has hampered our understanding various aspects its biology. Here, we reassess some biological properties using a new approach, based on known vertebral specimens O. and 165 species extinct extant neoselachian sharks across ten orders. Using median neurocranial caudal fin proportions relative to trunk proportion among non-mitsukurinid/non-alopiid lamniforms, show that could have...
The Western Interior Seaway (WIS) was a major epicontinental sea that divided North America during the Late Cretaceous with rich ecosystem hosted wide variety of marine life. seaway home to diverse range species, from microscopic planktonic organisms giant reptiles and sharks. However, food web structures trophic interactions among taxa remain largely ambiguous due challenges in reconstructing ecological fossil record. Fossil evidence predator-prey such as preserved bite marks, stomach...
The late Neogene megatooth shark, Otodus megalodon (Lamniformes: Otodontidae), is mostly known for its gigantic teeth and vertebrae. Re-examination of the rock matrix surrounding a previously described associated tooth set O. from upper Miocene Japan resulted in observation numerous fragments tessellated calcified cartilage placoid scales. morphology each tessera arrangement overall are practically identical to those extant chondrichthyans. Many scales possess pronounced, rather...
The extinct megatooth shark, †Otodus megalodon, which likely reached at least 15 m in total length, is an iconic shark represented primarily by its gigantic teeth the Neogene fossil record.As one of largest marine carnivores to ever exist, understanding biology, evolution, and extinction †O.megalodon important because it had a significant impact on ecology evolution ecosystems that shaped present-day oceans.Some attempts inferring body form have been carried out, but they are all speculative...
The submerged continental shelf of Onslow Bay, North Carolina, preserves hardbottom limestone scarps with underlying clays as small isolated exposures in progressively deeper water seaward from the modern-day shoreline. These formed a result wave- and current-driven erosion, transport, redeposition bottom sediments due to glacioeustactic sea level cyclicity migration ancestral shoreline since Pliocene. Fossiliferous lag deposits containing an abundance lamniform carcharhiniform teeth,...
The late Neogene megatooth shark, Otodus megalodon, is known mainly from its gigantic teeth and possibly reached 18–20 m in total length (TL). We re-examine the previously proposed body size trends nursery areas of O. megalodon by confining used samples to upper anterior offering more reliable TL estimates, taking paleolatitudes sea-surface temperatures into consideration. demonstrate that individuals are on average larger cooler water than those warmer – a pattern attributable Bergmann's...
The shallow continental shelf in the Cape Fear Region of southwestern Onslow Bay, North Carolina, contains lag deposits with an abundance megatoothed shark teeth belonging to Otodus megalodon (Agassiz 1835) and chubutensis (Ameghino 1906) that derive from Pliocene Yorktown Miocene Pungo River formations, respectively. These exhibit different frequencies orientations macroborings identified as Gastrochaenolites torpedo Kelly Bromley (1984 Kelly, S., R. Bromley. 1984. “Ichnological...
Shark teeth are abundant in the fossil record and integrate physiological information, ecological interactions, paleo-oceanographic conditions their chemistry. Fossil shark well suited for stable isotope analysis because enameloid is resistant to diagenetic alteration due its high chemical stability. Although often used paleoecological studies of mammals, carbonate carbon compositions (δ13CCO3) have remained enigmatic. Here, we investigate multiple systems (δ13Corg, δ13CCO3, δ18OCO3,...
The Arkadelphia Formation—Midway Group (Maastrichtian—Paleocene) contact near Malvern, Arkansas preserves a K-Pg boundary assemblage of turtle species consisting skull, shell, and non-shell postcranial skeletal elements. Malvern turtles are preserved within coquina lag deposit that comprises the basalmost Midway also contains an abundance other reptiles, as well chondrichthyans, osteichthyans, invertebrates. This records complex taphonomic history exhumation reburial vertebrate elements...
Reconstructing ancient food web structures and trophic interactions of extinct taxa is challenging typically relies on rare fossil evidence such as preserved bite marks, stomach content or faeces. In addition, diet inferences may be drawn from an anatomical approach, i.e., functional morphology. Yet none these methods alone can decisively identify the overall nor they quantify a species’ position. To address uncertainties we utilize new geochemical to animal’s position...
Abstract A new species of Hypolophites (Chondrichthyes, Myliobatiformes) is described from an assemblage isolated pavement teeth recovered the Lower Clayton Limestone Unit Midway Group (Paleocene) near Malvern, Arkansas. These were collected several localized lag deposits containing abundance chondrichthyan and osteichthyan teeth, invertebrate remains, trace fossils indicative a marginal-shallow marine depositional environment. To date, only four additional have been reported Paleocene that...
Glacial erratics belonging to the Rickard Hill facies (RHF) of Saugerties Member Schoharie Formation (upper Emsian: Lower Devonian) occur scattered throughout Piedmont northern New Jersey and Hudson Valley York. These RHF glacial contain an assemblage trilobites to: Anchiopella anchiops, Burtonops cristatus, Calymene platys, Terataspis grandis, cf. Trypaulites sp. Coniproetus This erratic trilobite consists predominately disarticulated cephala pygidia that were originally preserved as part a...
Partially carbonized driftwood recovered from a lag deposit at the Arkadelphia Formation–Midway Group Contact (K–Pg) near Malvern, Arkansas contains an abundance of macrobioerosion. Macroborings are oriented perpendicular and oblique to wood grain, straight sinuous in shape, ≤8 cm long, may have calcitic linings, belong Teredolites clavatus (Kelly & Bromley, 1984). The tightly spaced position borings on all surfaces suggests was afloat and/or exposed or seafloor shallow marine setting for...