Parham, J.F.*; Simison, W.B.; Kozak, K.H.; Feldman, C.R.: A reassessment of some recently described Chinese turtles Over the past 16 years, herpetologists described 13 new species of turtles. Most of these are based on specimens purchased from the pet trade. Herpetologists collected only two of these species, the rest have not been observed in the […]

Dworkin, I.M.*; Larsen, E.W: Temporal dynamics of the interaction between homothorax and Antennapedia in D. melanogaster The antenna to leg transformations induced by dominant alleles of Antennapedia (Antp) have become classic examples of homeotic transformation in D. melanogaster. It has recently been suggested that this transformation is due to Antp mediated repression of the homothorax […]

CORLEY, L.S.*; STRAND, M.R.: Regulation of Caste Fate in the Polyembryonic Wasp Copidosoma floridanum Striking morphological differentiation among individuals structures the complex societies found in insects such as termites, bees, and ants. Castes have also evolved in other insects such as aphids, thrips and polyembryonic wasps. Copidosoma floridanum is a polyembryonic parasitoid wasp that produces […]

DAVIS, G.K.*; JARAMILLO, C.A.; PATEL, N.H.: Pax group III genes and the evolution of insect pair-rule patterning We have investigated the expression of homologues of the Drosophila Pax group III (PgIII) genes paired (prd), gooseberry (gsb) and gooseberry-neuro (gsb-n) in short germ insects. During Drosophila embryogenesis, prd acts as one of several pair-rule genes to […]

FRIEDRICH, M.: Evolution of insect eye development: comparative and functional evidence for a conserved role of wingless in negatively controlling the spatial extent of retina differentiation Molecular genetic studies in model organisms like mouse and Drosophila have identified a number of genes, which appear to be expressed and required in similar ways during eye development. […]

Kettle, C. S.; Arthur, W.: Centipede embryology: conservation and change in early development within the Chilopoda and comparisons with other arthropods Centipedes provide a good opportunity to study the evolution of segmentation, because (a) different orders of centipedes have different numbers of segments and (b) within one order, Geophilomorpha, there is also intraspecific variation in […]

DAVIDSON, B.J.*; MOODY, W.; SWALLA, B.: Tunicate Out of Body Experiences: Extra-Somatic Cell Migration and Other Insights and Observations on Urochordate Metamorphosis We are investigating the morphological changes occurring during urochordate metamorphosis and the hormonal/transcriptional signals which coordinate this process. Initially, we have described a series of discrete morphological stages in the tunicate Boltenia villosa […]

Lambert, J.D.; Nagy, L.M.: The role of MAPK signaling in patterning mollusc embryos Classical experiments performed on the embryo of the mollusc Ilyanassa obsoleta demonstrate that the 3D macromere acts as an embryonic organizer, by signaling to other cells and inducing them to assume the correct pattern of cell fates. We have discovered that MAP […]

FISHER, G.R.*; DIMOCK, R.V. Jr.: The Role of the Larval Mantle Cells During Metamorphosis of Utterbackia imbecillis (Bivalvia: Unionidae) Larvae of Utterbackia imbecillis undergo a period of metamorphosis to the juvenile while parasitic on a host fish, but can also be induced to metamorphose in a modified cell culture medium. This metamorphosis involves some dramatic […]

BLACKSTONE, N.W.: Redox State, Reactive Oxygen Species (ROS), and Adaptive Growth of Hydroid Colonies Redox chemistry, involving the transfer of electrons and hydrogen atoms, is central to energy conversion in respiration, and control of gene expression by redox state commonly occurs in bacteria, allowing rapid response to environmental changes. Colonial hydroids often encrust surfaces over […]