Ecomorphology of plesiosaur flipper geometry

@article{OKeefe2001EcomorphologyOP,
  title={Ecomorphology of plesiosaur flipper geometry},
  author={F. Robin O'Keefe},
  journal={Journal of Evolutionary Biology},
  year={2001},
  volume={14}
}
  • F. O'Keefe
  • Published 1 November 2001
  • Biology
  • Journal of Evolutionary Biology
The Plesiosauria is an extinct group of marine reptiles once common in mesozoic seas. Previous work on plesiosaur hunting styles has suggested that short‐necked, large‐headed animals were pursuit predators, whereas long‐necked, small‐headed animals were ambush predators. This study presents new data on the aspect ratios (ARs) of plesiosaur flippers, and interprets these data via comparison with AR in birds, bats and aircraft. Performance trade‐offs implicit in AR variation are well‐understood… 
FUNCTIONAL MORPHOLOGY AND HYDRODYNAMICS OF PLESIOSAUR NECKS: DOES SIZE MATTER?
ABSTRACT —Plesiosaurs are an enigmatic, diverse extinct group of Mesozoic marine reptiles well known for their unique body plan with two pairs of flippers and usually an elongated neck. The long neck
Mobility and hydrodynamic implications of the long neck in plesiosaurs
Plesiosaurs are extinct marine reptiles that lived during the Mesozoic, well-known for their unique body plan with two pairs of flippers and an elongated neck. What this long neck was used for is
The evolution of plesiosaur and pliosaur morphotypes in the Plesiosauria (Reptilia: Sauropterygia)
Abstract The dichotomy between short-necked, large-headed “pliosaurs” and long-necked, small-headed “plesiosaurs” has formed the basis of plesiosaur taxonomy for over one hundred years. Recent work
The four-flipper swimming method of plesiosaurs enabled efficient and effective locomotion
TLDR
It is shown that plesiosaur hind flippers generated up to 60% more thrust and 40% higher efficiency when operating in harmony with their forward counterparts, when compared with operating alone, and the spacing and relative motion between the flippers was critical in governing these increases.
Elasmosaur (Reptilia: Sauropterygia) neck flexibility: implications for feeding strategies.
TLDR
Two-dimensional models based on a complete specimen of the Late Cretaceous elasmosaur Aphrosaurus furlongi suggest that maintenance of a straight neck while swimming, together with considerable lateral and/or ventral movement during prey capture and feeding are feasible.
Computer Simulations Imply Forelimb-Dominated Underwater Flight in Plesiosaurs
TLDR
It is concluded that plesiosaurs were forelimb-dominated swimmers that used their hind limbs mainly for maneuverability and stability, and not the most efficient biologically possible limb stroke.
Répteis que um dia dominaram os mares
TLDR
This work provides information to teachers so as to support basic education about the main groups of marine reptiles of the Mesozoic, and discusses aspects concerning anatomy, lifestyle, evolution and the implications of their discovery for the history of science.
The locomotion of extinct secondarily aquatic tetrapods
TLDR
An overview of the latest research on the locomotion of extinct secondarily aquatic tetrapods, with a focus on amniotes, highlighting the state‐of‐the‐art experimental approaches used in this field and discussing the suitability of these techniques for exploring different aspects of locomotory adaptation.
Correlated trends in the evolution of the plesiosaur locomotor system
TLDR
The evolution of the locomotor system in plesiosaurs sheds new light on the response of aquatic tetrapods to the physical constraints of foraging at large body size, and may have had an ecomorphological basis.
Maastrichtian plesiosaurs from northern Patagonia
Three relatively complete elasmosaurid plesiosaurs were recently recovered from the north of Patagonia, Argentina. They were found in the uppermost levels of the Jaguel Formation (upper
...
1
2
3
4
...

References

SHOWING 1-10 OF 35 REFERENCES
The evolution of plesiosaur and pliosaur morphotypes in the Plesiosauria (Reptilia: Sauropterygia)
Abstract The dichotomy between short-necked, large-headed “pliosaurs” and long-necked, small-headed “plesiosaurs” has formed the basis of plesiosaur taxonomy for over one hundred years. Recent work
A plesiosaur from the Linksfield erratic (Rhaetian, Upper Triassic) near Elgin, Morayshire
Synopsis An apparent series of eight plesiosaurian cervical vertebrae and an isolated tooth are described from the Rhaetian (or possibly Lower Jurassic) erratic block at Linksfield, Elgin,
Swimming capabilities of Mesozoic marine reptiles: implications for method of predation
TLDR
Estimating the total drag and the amount of energy available through metabolism, the maximum sustained swimming speed was calculated for 115 marine reptile specimens and suggests that the long-bodied forms probably used an ambush technique to capture prey, to maximize the range of possible prey and to minimize competition with the faster pursuit predators.
Measurements of the bodies and flukes of several cetacean species
TLDR
Values of body volume, mass, wetted-surface area, prismatic and volumetric coefficients, fluke area, aspect ratio and sweep angles were estimated from measurements obtained through an entrapment and stranding network to indicate a correlation between species and their relative swimming performance.
Ecological Morphology and Flight in Bats (Mammalia; Chiroptera): Wing Adaptations, Flight Performance, Foraging Strategy and Echolocation
TLDR
Bat wing morphology is considered in relation to flight performance and flight behaviour to clarify the functional basis for eco-morphological correlations in flying animals, and adaptive trends in wing adaptations are predictably and closely paralleled by echolocation call structure.
Stomach stones for feeding or buoyancy? The occurrence and function of gastroliths in marine tetrapods
TLDR
Consideration of function and occurrence in terrestrial forms suggests that the use of gastroliths in digestion would not be useful, and might even be harmful, to a carnivorous m arine tetrapod.
Form and Function in Avian Flight
TLDR
This chapter explores how the mechanics of flapping flight have molded the flight adaptations of birds and uses a multivariate analysis of wing morphology to demonstrate how these constraints interact to different degrees in different birds and underlie correlations among flight morphology, ecology, and behavior.
Vertebrate Paleontology
THE study of fossil vertebrates is a form of scholarship the importance of which is more fully realized in other countries than in Britain. We have about a dozen workers, while in the United States
Vertebrate Paleontology and Evolution
"Carroll has to his credit an immense amount of useful labour in writing the book and will probably corner the market for a vertebrate paleontology text for the rest of this century." Nature
Fundamentals of Flight
Fundamentals of flight , Fundamentals of flight , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
...
1
2
3
4
...