New fossil nematodes in Dominican and Baltic amber

in Nematology
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Four new species of fossil mermithids (Nematoda: Mermithidae) are described from amber: Heydenius arachnius n. sp. from a spider (Arachnida: Araneae) in Dominican amber, H. phasmatophilus n. sp., from a walking stick (Phasmatodea: Phasmatidae) in Baltic amber, H. podenasae n. sp. from a moth (Lepidoptera) in Baltic amber and H. trichorosus n. sp. from a caddis fly (Trichoptera: Leptoceridae) in Baltic amber. With previous descriptions of fossil mermithids from Diptera, Coleoptera, Hymenoptera and Hemiptera, there are now representatives of seven insect orders as hosts of fossil mermithids. With these additional four fossils, the total number of described nematode fossils is now 95, with 70 occurring in amber.

New fossil nematodes in Dominican and Baltic amber

in Nematology

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References

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Figures

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    Heydenius arachnius n. sp. adjacent to its spider host in Dominican amber. (Scale bar = 0.9 mm.)

  • View in gallery

    Two specimens of Heydenius trichorosus n. sp. adjacent to their trichopteran host, Triaenodes balticus, in Baltic amber. (Scale bar = 1.4 mm.)

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    Heydenius podenasae n. sp. (arrow) protruding from a moth in Baltic amber. (Scale bar = 1.6 mm.)

  • View in gallery

    Detail of Heydenius podenasae n. sp. protruding from a moth in Baltic amber. (Scale bar = 260 μm.)

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    Heydenius phasmatophilus n. sp. (arrow) adjacent to its phasmatid host, Balticophasma sp. in Baltic amber. (Scale bar = 2.1 mm.)

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    Detail of Heydenius phasmatophilus n. sp. in Baltic amber. (Scale bar = 390 μm.)

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    The filarial nematode Cascofilaria baltica Poinar (arrow) (accession no. SY-1-172, Poinar amber collection) adjacent to a female blackfly (Simuliidae) in Baltic amber. (Scale bar = 425 μm.)

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