REITNER, Joachim; Univ. of Goettingen, Geobiology: Sponges � A geobiological approach Sponges are ancestral metazoans with a great geobiological importance. They are divided in two clades, the silica forming sponges (Hexactinellida & Demospongiae), and the Mg-calcite forming Calcarea. The fossil record trace back 1.8 Mrd.y based on chemofossils. Intriguing is that all main taxa of […]
year: 2004
Sponge biodiversity and biogeography
HOOPER, John N.A.; SOEST, Rob W.M. Van; Queensland Museum, Brisbane; Zoological Museum University of Amsterdam: Sponge biodiversity and biogeography Even if the scope of the phylum Porifera is now better resolved, many features of sponge biodiversity are still poorly understood, including: the magnitude of species diversity, their spatial distributions, mechanisms for recruitment, dispersal and connectivity, […]
Sponge Reefs in the Queen Charlotte Basin Deep Sea Successors to Mesozoic Reefs
CONWAY, K.W.; KRAUTTER, M.; BARRIE, J.V.; WHITNEY, F.; THOMSON, R.E.; REISWIG, H.M.; LEHNERT, H.; Geological Survey of Canada – Pacific; University of Hannover; Geological Survey of Canada – Pacific; Insititute of Ocean Sciences; Insititute of Ocean Sciences; University of Victoria; University of Hamburg; : Sponge Reefs in the Queen Charlotte Basin: Deep Sea Successors to […]
Is bad taste expensive Resource allocation and chemical defenses of Caribbean sponges
PAWLIK, J. R.; Univ. of North Carolina at Wilmington: Is bad taste expensive? Resource allocation and chemical defenses of Caribbean sponges. Sponges are a major component of the benthic fauna of Caribbean reefs, and are consumed by a few species of predatory fishes (e.g., angelfishes). We previously discovered that Caribbean sponge species could be divided […]
Does the existing classification reflect the relationships within demosponges A molecular phylogenetic approach
NICHOLS, S. A.; University of California, Berkeley: Does the existing classification reflect the relationships within demosponges? A molecular phylogenetic approach. Demosponges are hypothesized to belong to the most basal metazoan clade. The majority of marine sponges and all freshwater sponges are included in the Demospongia. Despite their importance to our understanding of metazoan evolution and […]
Developmental genes in sponges and the antiquity of animal development
DEGNAN, BM; LEYS, SP; LARROUX, C; LIUBICICH, ; HINMAN, VF; Univ. of Queensland; Univ. of Alberta; Univ. of Queensland; Univ. of Queensland; Univ. of Queensland: Developmental genes in sponges and the antiquity of animal development The last common ancestor of all animals possessed features shared between the most basal metazoan lineage – Porifera – and […]
The Origin of Tetrapod Limbs Developmental Evolution meets Molecular Evolution
WAGNER, G P; STADLER, P ; METSCHER, B; TAKAHASHI, K; AMEMIYA, C; RUDDLE, F; Yale University; University of Leipzig; Southern Indiana University; Yale University; Virigina Mason Research Center; Yale University; ; : The Origin of Tetrapod Limbs: Developmental Evolution meets Molecular Evolution The transition from aquatic to terrestrial life is one of the most dramatic […]
The Neural Crest New Germ Layer, Skeletons, and Developmental Processes as Innovations
HALL, B. K.; Dalhousie University, Halifax: The Neural Crest: New Germ Layer, Skeletons, and Developmental Processes as Innovations The neural crest (NC) arises embryonically at the boundary between neural and epidermal ectoderm. As a craniate (hagfishes and vertebrates) synapomorphy, the neural crest qualifies as an innovation; in this instance, regarding a new feature as an […]
The Genetic Basis for Innovations in Floral Organ Identity
KRAMER, E. M.; JARAMILLO, M. A.; Harvard University, Cambridge MA; Harvard University, Cambridge MA: The Genetic Basis for Innovations in Floral Organ Identity. One of the most striking features of plants is their completely modular body plan. The basic plant module, the phytomer, is composed of a lateral determinate organ (e.g. a leaf) with its […]
Phenotypic Accommodation Adaptive Innovation Due to Developmental plasticity, With or Without Genetic Change
WEST-EBERHARD, M.J.; Smithsonian Tropical Research Institute: Phenotypic Accommodation: Adaptive Innovation Due to Developmental plasticity, With or Without Genetic Change Developmental plasticity, the environmental responsiveness of an organism during ontogenetic change (development), is a universal property of living things. One result of developmental plasticity is phenotypic accommodation, or the automatic mutual adjustment among responsive structures as […]
