Pterognathiidae
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Pterognathiidae is a family of
worm Worms are many different distantly related bilateria, bilateral animals that typically have a long cylindrical tube-like body, no limb (anatomy), limbs, and usually no eyes. Worms vary in size from microscopic to over in length for marine ...
s belonging to the order Filospermoidea. Genera: * '' Cosmognathia'' Sterrer, 1991 * '' Pterognathia'' Sterrer, 1966


References

Gnathostomulida Platyzoa families {{protostome-stub