Meeting Abstract 91.2  Thursday, Jan. 7  Evolutionarily conserved expression of genes involved in the differentiation of anterior neural tissues within the larva of the articulate brachiopod, Terebratalia transversa. SANTAGATA, S.**; RESH, C.; HEJNOL, A.; PASSAMANECK, Y.; MARTINDALE, M.Q.; Long Island University, C.W. Post Campus; Long Island University, C.W. Post Campus; Kewalo Marine Laboratory, University of Hawaii; Kewalo […]

Meeting Abstract 91.3  Thursday, Jan. 7  Embryonic and post-embryonic development of the polyclad flatworm Maritigrella crozieri, and the homology of lophotrochozoan larval characters RAWLINSON, Kate A; Smithsonian Marine Station rawlinsonk@si.edu There is a patchy distribution of ciliated planktonic (“larval”) stages across the Lophotrochozoa, and these stages share many morphological characters. This broad distribution of larval characters can […]

Meeting Abstract 91.10  Thursday, Jan. 7  Comparative Anatomy of Planuliform Nemertean Larvae GAVELIS, Gregory*; MASLAKOVA, Svetlana; Oregon Institute of Marine Biology gavelis@uoregon.edu Nemertean developmental studies have focused primarily on the pilidium larva of the pilidiophoran group, with little attention to the planuliform larvae of the palaeonemertans or hoplonemerteans. Morphogenesis of the proboscis, cerebral organs, and digestive system […]

Meeting Abstract 91.1  Thursday, Jan. 7  Cellular and molecular mechanisms of brain development in the annelid Capitella teleta MEYER, NP*; SEAVER, EC; Kewalo Marine Lab, PBRC, Univ. of Hawaii, Honolulu, HI nmeyer@hawaii.edu Capitella teleta (formerly Capitella sp. I) is a polychaete annelid whose central nervous system (CNS) consists of a dorsal, anterior brain, circumesophageal connectives and a […]

Meeting Abstract 91.11  Thursday, Jan. 7  Bringing Lophotrochozoa into Studies of Comparative Eye Development and Eye Evolution WEVER, JM*; HENRY, JJ; NEWMARK, PA; U Illinois – Urbana; U Illinois – Urbana; U Illinois – Urbana jwever2@illinois.edu Metazoan eyes have marveled both developmental and evolutionary biologists since Darwin wrote in Origin of Species, “to suppose that the eye […]

Meeting Abstract 91.7  Thursday, Jan. 7  Axes and organs in nemertean larvae: Development of a hoplonemertean HIEBERT, Laurel/S*; MASLAKOVA, Svetlana/A; Oregon Institute of Marine Biology; Oregon Institute of Marine Biology lhiebert@uoregon.edu Nemerteans display two major modes of larval development: via a juvenile-like planuliform larva, found in the paleonemerteans and hoplonemerteans, and via the unique planktotrophic pilidium larva, […]

Meeting Abstract 91.4  Thursday, Jan. 7  Asymmetric RNA segregation as a patterning mechanism in Ilyanassa RABINOWITZ, J.S.*; LAMBERT, J.D.; University of Rochester jrabinow@mail.rochester.edu Asymmetric cell divisions are required by multicellular organisms to generate tissue diversity during early development. Spiral cleaving embryos undergo highly stereotyped divisions where large macromeres divide asymmetrically to produce several small micromeres with specified […]

Meeting Abstract 91.6  Thursday, Jan. 7  A Secondary Embryonic Axis Induced by Transplanted D-quadrant Micromeres in an Oligochaete Annelid NAKAMOTO, A.*; SHIMIZU, T.; Univ. of Arizona; Hokkaido Univ. monaka@email.arizona.edu In many animals, a specific region in the early embryo has a remarkable potential to act as an organizer. For example, the Spemann and Mangold’s organizer not only […]

Meeting Abstract 91.3  Friday, Jan. 7  Subtle differences in gaits: the perspective of data driven Floquet analysis REVZEN, s*; GUCKENHEIMER, j/m; FULL, r/j; University of Pennsylvania; Cornell University; University of California at Berkeley shrevzen@seas.upenn.edu Most rapid forms of animal locomotion involve producing a gait – a rhythmic sequence of body motions that propels the body through space […]

Meeting Abstract 91.1  Friday, Jan. 7  Roll with it: how tarantulas turn over MCBRIDE, JA; CHADWELL, BA; ASHLEY-ROSS, MA*; Wake Forest University rossma@wfu.edu Like all arthropods, tarantulas (large spiders of the family Theraphosidae) must shed their exoskeletons in order to grow. When ready to molt, tarantulas roll onto their backs and laboriously “shrug” out of the old […]