CHOE, K.P.; VERLANDER, J.W.; WINGO, C.S.; EVANS, D.H.; Univ. of Florida; Univ. of Florida; Veterans Affairs Medical Center; Univ. of Florida: H+/K+-ATPase in an elasmobranch (Atlantic stingray, Dasyatis sabina): primary sequence and evidence for expression in gills The SCH28080-sensitive H+/K+-ATPase (HKa1) secretes acid in the stomach and kidneys of mammals. Like mammals, elasmobranchs also secrete […]

TIPSMARK, CK*; MADSEN, SS; BORSKI, RJ; North Carolina State Univ., Raleigh; Univ. of Southern Denmark, Odense; North Carolina State Univ., Raleigh: Expression of gill ion transporters in striped bass (Morone saxatilis) during salinity acclimation The time course of osmoregulatory adjustments and changes in expression of three key ion transporters in the gill were investigated in […]

REESE, S.A.; JACKSON, D.C.; CROCKER, C.E.; ULTSCH, G.R.; Brown University, Providence; Brown University, Providence; San Francisco State University, San Francisco; University of Alabama, Tuscaloosa: Acid-base and respiratory physiology of three species of turtles (Trachemys scripta, Terrapene carolina, and Apalone spinifera) and one species of tortoise (Gopherus polyphemus) in anoxia at 20 oC. Adult red-eared slider […]

HUTCHINSON, J.R.*; DONELAN, J.M.; ERICKSON, G.E.; VLIET, K.A.; KLEDZIK, D.; KRAM, R.; Stanford Univ.; Univ. of Alberta, Canada; Florida State Univ., Tallahassee; Univ. of Florida, Gainesville; St. Augustine Alligator Farm, Florida; Univ. of Colorado, Boulder; ; : The Biomechanics of Bounding Crocodiles Aside from some mammals, crocodylians are the only major extant tetrapod group known […]

MCBRATNEY-OWEN, B. M. ; OLSEN, B. R.; Harvard Medical School; Harvard Medical School: Mousehead Revisited – Microevolutionary Variation of the Cranial Base in Three Inbred Mouse Strains In order to investigate the genetic architecture and molecular development of morphological variation, the magnitude of morphological divergence must first be investigated among the variation being studied. This […]

GOSWAMI, A; University of Chicago, IL and Field Museum, Chicago, IL: Morphological Integration in the Mammalian Skull: The Influences of Phylogeny, Function, and Ontogeny Recent genetic and developmental studies have produced compelling hypotheses of the importance of trait correlations to morphological evolution. However, these hypotheses have never been tested with a broad, comparative data set […]

HOLLIDAY, Casey; Ohio University: Homology of extant archosaur jaw muscles: soft tissues and their osteological correlates. Divergent morphological specializations of extant groups and fragmentary descriptions of soft- and hard-tissue topology have hampered understanding of the evolution and homology of archosaur jaw musculature, hindering interpretation of feeding evolution in non-avian dinosaurs. A similarity test was conducted […]

VINCENT, S. E. ; IRSCHICK, D. J. ; HERREL, A. ; Tulane University: Has head shape evolved to match feeding mode in natricine snakes? Convergence and constraints Macrostomatan snakes have independently evolved multiple feeding modes (e.g., piscivory, dietary generalist) and are often dietary specialists. Because snakes are gape-limited predators, it is generally thought that a […]

VAN VALKENBURGH, B; SEDLMAYR, JC; Univ. of California, Los Angeles: Cephalic Vasculature in Canidae Canids are an ubiquitous group of basal carnivorans, yet, outside domestic dogs ,very little is known of canid anatomy or physiology. Canids can provide an important test of the correlation of purported vascular physiological devices with important physiological behaviors that protect […]

TURBEVILLE, J. M.; Virginia Commonwealth Univ.: Ultrastructure of the Proboscis Pseudocnids of the Palaeonemerteans Cephalothrixcf.rufifrons and Carinomella lactea and an Assessment of their Phylogenetic Utility. The ultrastructure of proboscis pseudocnids (= filament-core rhabdoids) of the palaeonemertines Cephalothrix cf. rufifrons and Carinomella lactea was examined to clarify the organization of these structures and to enhance evaluation […]