Meeting Abstract 26.2  Monday, Jan. 4  Evolutionary variation in physiological traits contributes to differences in swimming capacity among migratory and non-migratory threespine stickleback (Gasterosteus aculeatus). DALZIEL, AC*; SCHULTE, PM; University of British Columbia; University of British Columbia dalziel@zoology.ubc.ca The threespine stickleback species group contains a number of unique ecotypes, including migratory and non-migratory (stream-resident) populations. The migratory […]

Meeting Abstract 26.6  Wednesday, Jan. 5  Phylogeny and divergence times of Pancrustacea based concatenated analysis of 200 genes and morphology OAKLEY, Todd H.*; LINDGREN, Annie R.; WOLFE, Joanna M.; ZAHAROFF, Alexander K.; JUAREZ, Bryan; Univ. of California, Santa Barbara; Univ. of California, Santa Barbara; Yale University; Univ. of California, Santa Barbara; Univ. of California, Santa Barbara oakley@lifesci.ucsb.edu […]

Meeting Abstract 26.3  Wednesday, Jan. 5  Phylogenomics of Hemichordata within Deuterostomia CANNON, Johanna T*; KOCOT, Kevin M; SANTOS, Scott R; SWALLA, Billie J; HALANYCH, Kenneth M; Auburn University; Auburn University; Auburn University; University of Washington; Auburn University cannojt@auburn.edu Hemichordates are of particular interest to studies of early chordate and deuterostome evolution due to several shared morphological features. […]

Meeting Abstract 26.2  Wednesday, Jan. 5  Phylogenomic investigation of molluscan evolutionary relationships KOCOT, Kevin M.*; CANNON, Johanna T.; TODT, Christiane; KOHN, Andrea B.; CITARELLA, Mathew R.; MEYER, Achim; SCHANDER, Christoffer; SANTOS, Scott R.; MOROZ, Leonid L.; LIEB, Bernhard; HALANYCH, Kenneth M.; Auburn University; Auburn University; University of Bergen; Whitney Laboratory for Marine Biosciences; Whitney Laboratory for Marine […]

Meeting Abstract 26.4  Wednesday, Jan. 5  Molecular paleobiological insights into the origin of the Brachiopoda SPERLING, Erik A.*; PISANI, Davide; PETERSON, Kevin J; Yale University; National University of Ireland, Maynooth; Dartmouth College erik.sperling@yale.edu Most studies of brachiopod evolution have been based on their extensive fossil record, but molecular techniques, due to their independence from the rock record, […]

Meeting Abstract 26.5  Wednesday, Jan. 5  Living Fossils? The Phylogeny and Fossil Record of Branchiopod Crustaceans HEGNA, T. A.; Yale Univ., New Haven, CT thomas.hegna@yale.edu Branchiopods are a small and morphologically diverse clade of predominantly freshwater crustaceans; likely crown-group representatives have been in existence since the Devonian Period (over 360 mya). Branchiopoda consists of several groups: the […]

Meeting Abstract 26.1  Wednesday, Jan. 5  Chelicerate tagmosis: inferred homeotic development in extinct taxa WOLFE, Joanna M.*; LEGG, David A.; Yale University; Imperial College London jo.wolfe@yale.edu Arthropod tagmosis is the differentiation of segments along the anterior/posterior axis, producing appendages specialized for sensation, feeding, and locomotion. Characters relating to segment and limb number and morphology are important in […]

Meeting Abstract 26.1  Wednesday, Jan. 4  The origin of insect A/P axis determination pathways – insights from the holometabolous milkweed bug, Oncopeltus fasciatus WEISBROD, Anat; CHIPMAN, Ariel*; The Hebrew University of Jerusalem; The Hebrew University of Jerusalem ariel.chipman@huji.ac.il A key early process in development is the determination of the embryonic axes. The anterior-posterior axis in insects is […]

Meeting Abstract 26.2  Wednesday, Jan. 4  Revaluating spiral-like cell cleavage patterns during the embryonic development of phoronids and brachiopods. SANTAGATA, Scott; Long Island University scott.santagata@gmail.com Embryonic patterns in cell cleavage and blastomere arrangements continue to be used as phylogenetically informative characters. However, cleavage patterns are clearly subject to evolutionary modifications especially among the various phyla that exhibit […]

Meeting Abstract 26.5  Wednesday, Jan. 4  Life History Evolution: Insights from Comparative Development and Gene Expression in Sipuncula BOYLE, M. J.*; RICE, M. E.; Smithsonian Marine Station at Fort Pierce, Florida boylem@si.edu Marine invertebrate animals develop through some of the most diverse life history patterns on earth, but how those patterns evolve is a mystery. We are […]