... being completely eaten up. Moreover, the large-eyed trilobite Nileus , which has a similar size and morphology to Ordosaspis , had a theoretical preying rate less than 1/20 of that of Ordosaspis , indicating that the eye is an important sensory organ in trilobites. The increased predation pressure may...

... or absence of macroscopic sense organs in specific Cambrian taxa (e.g., Zhang and Shu 2007 ). Various papers have discussed, on genetic and developmental grounds, the potential existence of sensory cells, sensilla, and organs in ancestral Metazoa and Bilateria ( Knoll and Carroll 1999 ; Erwin 2005...

... sensory organs, nervous systems, and brains (e.g., Chen et al. 1999 ; Shu et al. 2003 ; Paterson et al. 2011 ; Ma et al. 2012 ; Schoenemann and Clarkson 2013 , 2017 ; Tanaka et al. 2013 ; Cong et al. 2014 ; Strausfeld 2015 ). Panarthropods (arthropods and their relatives), possessing a diversity...

... microscopy techniques, including electron holography, reveal the complex interplay between the physical and magnetic properties and biological functions of ferrimagnetic nanocrystals in bacteria. although some information is now available about magnetic sensory systems in more complex organisms, much further...

... of teeth, an anteriorly arched shape of the premaxilla, a lateral rostral bone participating in the orbital margin, parietals separated in the midline by small bones, the insertion of the basisphenoid region of the braincase into a posterior area on the parasphenoid, and an ethmoidal sensory canal running...

... selection. This evolutionary pattern has been termed exaptation ( Gould and Vrba, 1982 ). For a seismic-escape response to develop in this fashion, an organism would need to combine an existing escape, panic, or “exit from the burrow” behavioral pattern with one or more appropriate sensory inputs to trigger...

... or analogs and may occasionally be preserved as “frozen behavior.” Navigation capacity is “where to move,” and reflects the organism's sensory capabilities. Fossil sense organs and sensory abilities can be directly observed or inferred from morphologic correlates or phylogeny. Motion capacity is “how to move...

... from convergent evolution in the unrelated desert plants of a New World cactus and a Kenyan spurge. And that’s just a sample. But more intriguingly, many of the sensory organs of widely different organisms have also evolved independently, sometimes many times over. The camera-like eye is a classic...

... is the reluctance to consider the ethology of extinct animals and the real possibility of changing levels of intelligence that might be mediated in part by the evolution of more complex sensory organs, especially olfaction and vision. This is not to say, however, that some of the current investigators...

...María E. Arnaudo; Michelle Arnal Abstract The study of the cranial endocast provides valuable information to understand the behavior of an organism because it coordinates sensory information and motor functions. In this work, we describe for the first time the anatomy of the encephalon of an early...

... data add to morphofunctional information obtained from fossil organisms and indicate that predation occurred at different levels of the water column with: (1) endobenthic predators (diverse priapulid fauna) feeding near the sediment-water interface; (2) epibenthic predators/scavengers (almost...

... and the ability of the organism to shift to a higher or lower bedding surface. The chaotic pathways and lack of recognizable patterns in Helminthoidichnites implies that sensory systems were not being used extensively in the construction of the burrows. This may imply that organisms had poor sensory skills...

... and other arthropods ( Clarkson et al., 2006 ; Lee et al., 2011 ), the sensory organs of fossil invertebrates have been little studied ( Plotnick et al., 2010 ). In this paper we will show that one such organ, the tympanal ears of insects, not only has high preservation potential, but is of major...

.... Revan A. Ho A. 2012 . Evolution of the brain and sensory organs in Sphinsciformes: new data from the stem penguin Paraptenodytes antarcticus . Zoological Journal of the Linnean Society, London , 166 : 202...

... far anterior in the blunt head and the dentition consists of a series of small, equal-sized and slender conical teeth on the jaw borders. Canals and pit-lines of the sensory organs in the skull are wide and easily discernible; the maxilla and the tail share a modified palaeonisciform shape. The scales...

... experience. the presence of Divinity became almost palpable and I knew that life in the universe was not just an accident based on random processes. This knowledge came to me directly - poetically . .. It was not perceptible by the sensory organs, but it was there nevertheless - an unseen dimension behind...

... indentation in most living siphonate gastropods is associated with organs that produce a narrow anterior inhalant current of water. Associated sensory organs detect both the concentration and direction of chemical cues released by distant food, enemies, or mates ( Lindberg and Ponder 2001 ). Inhalant streams...

... on organic remains with the placoderms. A detailed lithological description of the enclosing rocks and a taphonomic description of the ichthyofauna are also provided. The 2010 Stratigraphic Chart of the Devonian deposits of Belarus was used as the stratigraphic basis. The presence of the genus Actinolepis...

... are covered with specialized sensilla and slit organs that perform thermosensory, hygrosensory, gustatory, olfactory, mechanosensory, and proprioceptive functions (Talarico et al., 2006 ). The long length of the second leg makes it particularly well suited for sensory purposes; modern ricinuleids tap...