Meeting Abstract S5.9 Jan. 5 The Origin(s) of Segmentation in Animals AKAM, M*; BRENA, C; CHIPMAN, A.C; ERIKSSON, J; PEEL, A; University Museum of Zoology, Cambridge; University Museum of Zoology, Cambridge; University Museum of Zoology, Cambridge; University Museum of Zoology, Cambridge; University Museum of Zoology, Cambridge m.akam@zoo.cam.ac.uk Three major animal lineages are segmented – the annelids, the […]
sessions: S5
Rocks and Clocks Integrating Fossils and Molecules to Date Transitions in Early Animal Evolution
Meeting Abstract S5.6 Jan. 5 Rocks and Clocks: Integrating Fossils and Molecules to Date Transitions in Early Animal Evolution COLLINS, Allen/G*; CARTWRIGHT, Paulyn; NOAA; University of Kansas collinsa@si.edu Among the key transitions in early animal evolution are those that occurred near the origins of multicellularity: the sponge body plan, epithelial tissues, guts, colloblasts, cnidae, bilaterality and mesoderm. […]
Redox signaling and the transition from basal metazoans to bilaterians
Meeting Abstract S5.5 Jan. 5 Redox signaling and the transition from basal metazoans to bilaterians BLACKSTONE, N.W.; Northern Illinois University neilb@niu.edu Living things invariably consist of some kind of compartmentalized redox chemistry. Signaling pathways mediated by oxidation and reduction thus derive from the nature of life itself. The role of such redox signaling broadened with major transitions […]
Origins of Sensory and Neural Organization in Basal Metazoa
Meeting Abstract S5.3 Jan. 5 Origins of Sensory and Neural Organization in Basal Metazoa JACOBS, David K.*; NICHOLS , Scott; HARTENSTEIN, Volker; NAKANISHI, Nagayasu; YUAN, David; UCLA; UC, Berkeley; UCLA; UCLA; UCLA djacobs@ucla.edu The roots of the word animal imply muliticellular motility with inherent requirements for sensation and locomotory response. Cnidarians are traditionally viewed as the most […]
More than one way to make a worm
Meeting Abstract S5.10 Jan. 5 More than one way to make a worm HOLLAND, P.W.H.*; JIMENEZ-GURI, E.; PHILIPPE, H.; OKAMURA, B.; REINHARDT, R.; YOUNGER , R.; FURLONG, R.F.; University of Oxford, UK; University of Oxford, UK; University of Montreal, Canada; University of Reading, UK; MPI Molecular Genetics, Berlin; University of Oxford, UK; University of Oxford, UK peter.holland@zoo.ox.ac.uk […]
Implications of cnidarian gene expression data for the origins of bilaterality is the glass half full or half empty
Meeting Abstract S5.8 Jan. 5 Implications of cnidarian gene expression data for the origins of bilaterality � is the glass half full or half empty? MILLER, David J*; DE JONG, Danielle M; SCHIERWATER, Bernd; HAYWARD, David C; BALL, Eldon E; James Cook University; Australian National University; Tier�rztliche Hochschule Hannover; Australian National University; Australian National University david.miller@jcu.edu.au The […]
Do Genome Duplications Play a Role in Key Transitions
Meeting Abstract S5.4 Jan. 5 Do Genome Duplications Play a Role in Key Transitions? WAGNER, G. P. *; CROW, K. ; LYNCH, V. ; Yale University; Yale University; Yale University gunter.wagner@yale.edu A survey of gene duplications in early metazoan, vertebrate and plant phylogenies suggests an association between major transitions and gene duplication events. The evidence for a […]
Cnidarian milestones in metazoan evolution
Meeting Abstract S5.1 Jan. 5 Cnidarian milestones in metazoan evolution BOERO, Ferdinando*; SCHIERWATER, Bernd; PIRAINO, Stefano; DiSTeBA , University Lecce, Italy; ITZ, Ecology & Evolution, Hannover, Germany; DiSTeBA , University Lecce, Italy boero@unile.it Cnidaria (characterized by the presence of cnidocysts) contain most of the characters considered as milestones of Metazoan evolution. It is suggested that nervous cells, […]
Thyroid hormones and iodine in the evolutionary history of cell-cell signalling
Meeting Abstract S5.2 Monday, Jan. 5 Thyroid hormones and iodine in the evolutionary history of cell-cell signalling CROCKFORD, S.J.; University of Victoria, BC scrock@uvic.ca In vertebrates, thyroid hormones (THs, thyroxine and triiodothyronine) are critical cell signalling molecules. THs regulate and coordinate physiology within and between cells, tissues and whole organisms, in addition to controlling embryonic growth and […]
The ancestry of animal cell signaling genes
Meeting Abstract S5.4 Monday, Jan. 5 The ancestry of animal cell signaling genes NICHOLS, Scott A.; University of California, Berkeley nichols1@berkeley.edu The evolution of cell signaling mechanisms is thought to have been a pre-requisite to the evolution of multicellularity and the diversification of animal body plans. Reconstructing the ancestry of these mechanisms is complicated by their complexity […]
