Filospermoidea

Filospermoidea is an order within the phylum Gnathostomulida.^[1][2][3] Filospermoids are generally longer than gnathostomulids in the order Bursovaginoidea, and have an elongate rostrum.^[4] It lives in North America, off the coasts of the southern United States and the Caribbean, primarily in the Gulf of Mexico, as well as in southeastern Denmark.^[5]

Filospermoidea
Scientific classification
Kingdom:	Animalia
Phylum:	Gnathostomulida
Order:	Filospermoidea
Families
Haplognathiidae Pterognathiidae Also see text

Classification

The order Filospermoidea contains 29 species in 2 families and 3 genera.^[6]

• Family Haplognathiidae
  • Genus Haplognathia
    • Haplognathia asymmetrica
    • Haplognathia belizensis
    • Haplognathia filum (sometimes in Pterognathia)
    • Haplognathia gubbarnorum (sometimes in Pterognathia)
    • Haplognathia lunulifera (sometimes in Pterognathia)
    • Haplognathia rosea (sometimes in Pterognathia)
    • Haplognathia ruberrima (sometimes in Pterognathia)
    • Haplognathia rubromaculata (sometimes in Pterognathia)
    • Haplognathia rufa
    • Haplognathia simplex (sometimes in Pterognathia)
• Family Pterognathiidae
  • Genus Cosmognathia
    • Cosmognathia aquila
    • Cosmognathia arcus
    • Cosmognathia bastillae
    • Cosmognathia manubrium
  • Genus Pterognathia
    • Pterognathia alcicornis
    • Pterognathia atrox
    • Pterognathia crocodilus
    • Pterognathia ctenifera
    • Pterognathia hawaiiensis
    • Pterognathia grandis
    • Pterognathia meixneri
    • Pterognathia portobello
    • Pterognathia pygmaea
    • Pterognathia sica
    • Pterognathia sorex
    • Pterognathia swedmarki
    • Pterognathia tuatara
    • Pterognathia ugera
    • Pterognathia vilii