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Poecilogony in the caenogastropod Calyptraea lichen (Mollusca: Gastropoda)
TLDR
This work documents the eleventh case of poecilogony in marine invertebrates, and the first in a caenogastropod mollusc, and demonstrates that females can produce two different kinds of broods.
Cleavage pattern and fate map of the mesentoblast, 4d, in the gastropod Crepidula: a hallmark of spiralian development
TLDR
The 4d lineage in the gastropod Crepidula fornicata, an established model system for spiralian biology, and in a closely related direct-developing species, C. convexa is investigated, presenting the first fate map of the 4d micromere sublineages in a mollusk and revealing that endodermal and mesodermal fates segregate much later than previously thought.
Eco-evo-devo: the time has come.
TLDR
This chapter discusses some key and emerging concepts within eco-evo-devo that show that the environment is a source and inducer of genotypic and phenotypic variation at multiple levels of biological organization, while development acts as a regulator that can mask, release, or create new combinations of variation.
The genome of the water strider Gerris buenoi reveals expansions of gene repertoires associated with adaptations to life on the water
TLDR
It is suggested that local gene duplications might have played an important role during the evolution of water striders, and the sequencing and manual annotation of the Gerris buenoi genome is reported; the first water strider genome to be sequenced thus far.
The development of viable and nutritive embryos in the direct developing gastropod Crepidula navicella.
TLDR
Using light microscopy and time-lapse imaging of laboratory-reared embryos, the development of Crepidula navicella is described, a direct developer with nutritive embryos that cleave and gastrulate, which will allow for future research on the developmental and molecular mechanisms of nutritive embryo development of C. Navicella to address the role of nutritives in the origins of developmental polyphenisms.
Comparative Transcriptomics of Alternative Developmental Phenotypes in a Marine Gastropod.
TLDR
Gene Ontology term enrichment with GOSeq found that these are associated with the negative regulation of apoptotic processes, which suggests that apoptosis is important in the formation of gastrula-like nutritive embryos.
Growth and differentiation during delayed metamorphosis of feeding gastropod larvae: signatures of ancestry and innovation
TLDR
Character mapping on a phylogenetic hypothesis suggests that large larval size and capacity for continued growth during delayed metamorphosis, as exhibited by some caenogastropods, is a derived innovation among feeding gastropod larvae.
Beyond the sea: Crepidula atrasolea as a spiralian model system.
TLDR
A developmental transcriptome for C. atrasolea is presented, covering early cleavage through late organogenesis stages, as a useful tool for future studies of gene expression and function, and is provided to the broader developmental community to facilitate widespread use of this system.
The genome of the water strider Gerris buenoi reveals expansions of gene repertoires associated with adaptations to life on the water
TLDR
The sequencing and manual annotation of the Gerris buenoi genome suggest that local gene duplications might have had an important role during the evolution of water striders and open exciting research opportunities to understand adaptation and genome evolution of this unique hemimetabolous insect.
Early Activation of MAPK and Apoptosis in Nutritive Embryos of Calyptraeid Gastropods
TLDR
The results show that MAPK and apoptosis are expressed during early development in species with nutritive embryos, and raises the possibility that these processes may play a role and even interact with one another in producing the nutritive embryo phenotype.
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