Broad phylogenomic sampling improves resolution of the animal tree of life Dunn CW, Hejnol A, Matus DQ, Pang K, Browne WE, Smith SA, Seaver E, Rouse GW, Obst M, Edgecombe GD, Sørensen MV, Haddock SH, Schmidt-Rhaesa A, Okusu A, Kristensen…
Phylogenetic analysis of lineage relationships among hyperiid amphipods as revealed by examination of the mitochondrial gene, cytochrome oxidase I (COI)William E. Browne, Steven H. D. Haddock, and Mark Q. Martindale The Hox gene complement of a pelagic chaetognath, Flaccisagitta enflataDavid…
High-resolution fate map of the snail Crepidula fornicata: The origins of ciliary bands, nervous system, and muscular elementsAndreas Hejnol, Mark Q. Martindale, and Jonathan Q. Henry The littorinimorph gastropod Crepidula fornicata shows a spiralian cleavage pattern and has been the…
Expression of otd orthologs in the amphipod crustacean, Parhyale hawaiensisBrowne WE, Schmid BG, Wimmer EA, Martindale MQ The arthropod head is a complex metameric structure. In insects, orthodenticle (otd) functions as a ‘head gap gene’ and plays a significant role…
Stages of embryonic development in the amphipod crustacean, Parhyale hawaiensisBrowne WE, Price AL, Gerberding M, Patel NH Studying the relationship between development and evolution and its role in the generation of biological diversity has been reinvigorated by new techniques in…
Unexpected complexity of Wnt gene family in a sea anemoneKusserow, A., Pang, K., Sturm, C., Hrouda, M., Lentfer, J., Technau, U., Hobmayer, B., Martindale, M.Q., and Holstein, T.W. The Wnt gene family encodes secreted signalling molecules that control cell fate…
Rapid behavioral responses of an invertebrate larva to dissolved settlement cueMichael G. Hadfield and M. A. R. Koehl Larvae of the nudibranch Phestilla sibogae were used to study whether a natural dissolved settlement cue (from their prey, Porites compressa, an…
Invited cover imageElaine Seaver Ventral view of a late stage larva of the polychaete Capitella capitata. The anterior end is marked by two orange larval eye spots. Annelids are one of the three major segmented animal groups and represent an…
Investigating the origins of triploblasty: “Mesodermal” gene expression in a diploblastic animal, the sea anemone, Nematostella vectensis (phylum, Cnidaria; Class Anthozoa)Mark Q. Martindale, Kevin Pang, and John R. Finnerty Mesoderm played a crucial role in the radiation of the triploblastic…
Characterization of gill-specific genes of the acorn worm Ptychodera flavaNoko Okai, Kunifumi Tagawa, Tom Humphreys, Nori Satoh, Michio Ogasawara Acorn worms are hemichordate deuterostomes that have remarkable gills thought to be homologous to pharyngeal gills in urochordates and cephalochordates, and…