• "Die Gnathostomulida, eine rätselhafte Wurmgruppe aus dem Meeressand". ... "Indication of an Anal Pore in Gnathostomulida".
  • 8.1C) (Sterrer, 1974). For more details on classification of gnathostomulids, Jenner (2014) may be consulted. Gnathostomulida 49. FIGURE 8.1.
  • Animal Life ResourceJellyfish, Sponges, and Other Simple AnimalsGnathostomulids: Gnathostomulida - Physical Characteristics, Red Haplognathia...
  • Originally regarded as primitive animals with affinities to flatworms, the phylogenetic position of Gnathostomulida has been debated.
  • Characteristics of Gnathostomulida: Bilaterally symmetrical, and vermiform. Body has more than two cell layers, tissues and organs.
  • 1998. Gnathostomulida - an enigmatic metazoan phylum from both morphological and molecular perspectives. Molecular Phylogenetics and Evolution 9:72-79.
  • Kids robot.svg In Spanish: Gnathostomulida para niños.
  • 1998. Gnathostomulida - an enigmatic metazoan phylum from both morphological and molecular perspectives. Molecular Phylogenetics and Evolution 9:72-79.
  • "Die Gnathostomulida, eine rätselhafte Wurmgruppe aus dem Meeressand". ... "Indication of an Anal Pore in Gnathostomulida". Zoologica Scripta.