ArticleEvolution & development2022
Comparative reconstruction of the predatory feeding structures of the polyphenic nematode Pristionchus pacificus.
Article in Evolution & development, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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10 citing papers in PubMed, 12 citations in OpenAlex.
- Polyphenism Through RNA Chemical Modifications.Molecular ecology · 2026Review
- Article
- From muscle to gland: The reorganization of the terminal bulb within the symbiotic Stilbonematinae (Nematoda, Desmodoroidea).Journal of nematology · 2026Article
- From nematode to Nobel: How community-shared resources fueled the rise ofProceedings of the National Academy of Sciences of the United States of America · 2025Article
- Co-option of an Astacin Metalloprotease Is Associated with an Evolutionarily Novel Feeding Morphology in a Predatory Nematode.Molecular biology and evolution · 2023Article
- Article
- The improved genome of the nematode Parapristionchus giblindavisi provides insights into lineage-specific gene family evolution.G3 (Bethesda, Md.) · 2022Article
- The oscillating Mucin-type protein DPY-6 has a conserved role in nematode mouth and cuticle formation.Genetics · 2022Article
- Comparative reconstruction of the predatory feeding structures of the polyphenic nematode Pristionchus pacificus.Evolution & development · 2022Article
- Linking Molecular Mechanisms and Evolutionary Consequences of Resource Polyphenism.Frontiers in integrative neuroscience · 2022Review
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Pristionchus pacificus is a nematode model for the developmental genetics of morphological polyphenism, especially at the level of individual cells. Morphological polyphenism in this species includes an evolutionary novelty, moveable teeth, which have enabled predatory feeding in this species and others in its family (Diplogastridae). From transmission electron micrographs of serial thin sections through an adult hermaphrodite of P. pacificus, we three-dimensionally reconstructed all epithelial and myoepithelial cells and syncytia, corresponding to 74 nuclei, of its face, mouth, and pharynx. We found that the epithelia that produce the predatory morphology of P. pacificus are identical to Caenorhabditis elegans in the number of cell classes and nuclei. However, differences in cell form, spatial relationships, and nucleus position correlate with gross morphological differences from C. elegans and outgroups. Moreover, we identified fine-structural features, especially in the anteriormost pharyngeal muscles, that underlie the conspicuous, left-right asymmetry that characterizes the P. pacificus feeding apparatus. Our reconstruction provides an anatomical map for studying the genetics of polyphenism, feeding behavior, and the development of novel form in a satellite model to C. elegans.
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