Meeting Abstract 35-7 Sunday, Jan. 5 09:30 – 09:45 Shark Dermal Denticles: Loss and Regeneration Patterns Vary with Body Position and Ecotype COLOMBERO, CR*; WAINWRIGHT, DK; LAUDER, GV; Harvard University; Yale University; Harvard University crcolombero@college.harvard.edu Dermal denticles – the characteristic scale-type of sharks – are tooth-like structures embedded in the skin. Observation of denticles in a diversity […]
sessions: Session 35
New Triassic Reptile Reveals Oldest Record of a Complete Envenomation Apparatus
Meeting Abstract 35-4 Sunday, Jan. 5 08:45 – 09:00 New Triassic Reptile Reveals Oldest Record of a Complete Envenomation Apparatus EDDINS, HMS*; KLIGMAN, BT; NESBITT, SJ; MARSH, A; PARKER, W; STOCKER, MR; Virginia Tech, Blacksburg, VA ; Virginia Tech, Blacksburg, VA, Petrified Forest National Park, Petrified Forest, AZ; Virginia Tech, Blacksburg, VA ; Petrified Forest National Park, […]
Morphological Similarity in the Dentition of Competing and Non-Competing Rodents
Meeting Abstract 35-2 Sunday, Jan. 5 08:15 – 08:30 Morphological Similarity in the Dentition of Competing and Non-Competing Rodents BIRLENBACH, DM*; KELLER, JS; FOX, DL; University of Minnesota; University of New Mexico; University of Minnesota birle001@umn.edu One of the most fundamental species interactions is competition. However, in the fossil record competition cannot be observed or experimentally tested. […]
Modeling rodent tooth morphogenesis reveals constraints on mammalian tooth evolution
Meeting Abstract 35-1 Sunday, Jan. 5 08:00 – 08:15 Modeling rodent tooth morphogenesis reveals constraints on mammalian tooth evolution BURROUGHS, RW; University of Chicago rburroughs@uchicago.edu Mammal tooth morphology and function correlate strongly with dietary ecology, and convergence is a major feature of mammalian tooth evolution. Yet, function and ecology are insu cient to explain morphological diversi […]
Is variation in molar tooth crown morphology of the Grasshopper Mouse (Onychomys leucogaster) a reflection of selection or drift
Meeting Abstract 35-3 Sunday, Jan. 5 08:30 – 08:45 Is variation in molar tooth crown morphology of the Grasshopper Mouse (Onychomys leucogaster) a reflection of selection or drift? VITEK, NS*; MCDANIEL, SF; BLOCH, JI; Stony Brook University, NY; University of Florida, Gainesville, FL ; Florida Museum of Natural History, Gainesville FL natasha.vitek@stonybrook.edu http://nsvitek.com A longstanding question in […]
Impacts of Environmental Gradients on Shark Body Size a Comparison from Fossil Evidence and Demographic Modeling of Sand Tigers
Meeting Abstract 35-6 Sunday, Jan. 5 09:15 – 09:30 Impacts of Environmental Gradients on Shark Body Size: a Comparison from Fossil Evidence and Demographic Modeling of Sand Tigers KIM, SL*; YEAKEL, JD; EBERLE, JJ; ZEICHNER, SS; University of California, Merced; University of California, Merced; University of Colorado – Boulder; California Institute of Technology, Pasadena, CA skim380@ucmerced.edu http://sora.leekim.org […]
Do sockets shape teeth in non-mammalian thecodonts A case study in Alligator mississippiensis
Meeting Abstract 35-5 Sunday, Jan. 5 09:00 – 09:15 Do sockets shape teeth in non-mammalian thecodonts? A case study in Alligator mississippiensis KAY, DI*; GIGNAC, PM; O’BRIEN, HD; Oklahoma State University Center for Health Sciences, Tulsa david.kay@okstate.edu In heterodont mammals, the alveolus mechanically shapes and adds complexity to the developing crown (e.g. rodents). In crocodylians, which are […]
The effects of organic and inorganic phosphate on muscle contraction and acetyl cholinesterase activity of the nearshore echinoid Lytechinus variegatus
Boettger, S.A.*; McClintock, J.B.: The effects of organic and inorganic phosphate on muscle contraction and acetyl cholinesterase activity of the nearshore echinoid Lytechinus variegatus. Lytechinus variegatus is a common nearshore sea urchin that is exposed to phosphate pollutants. Sea urchins were collected in April, 2000 from Saint Joseph’s Bay in the northern Gulf of Mexico. […]
Is intron 2 of the Fundulus lactate dehydrogenase B gene a hypoxia responsive element
REES, B.B.*; SCHULTE, P.M.: Is intron 2 of the Fundulus lactate dehydrogenase B gene a hypoxia responsive element? Previous studies have shown that liver lactate dehydrogenase B (LDH-B) activity increases during hypoxic exposure of F. heteroclitus. Several glycolytic genes in mammals are known to be upregulated during hypoxia via the binding of hypoxia-inducible factor (HIF-1) […]
Heat-shock protein (hsp) 70 and promoter sequences in species of the genus Tegula from widely differing thermal environments
TOMANEK, L.*; SOMERO, G.N.: Heat-shock protein (hsp) 70 and promoter sequences in species of the genus Tegula from widely differing thermal environments Marine gastropod species of the genus Tegula occupy widely differing thermal environments along the transition from the sub- to the intertidal zone. Corresponding with these differences in vertical zonation are findings that the […]
