Bergen Mus Årbok 9:1–15ĭDBJ (2021) DNA Data Bank of Japan. Bull Cl Phys Math Acad Imp Sci Saint-Pétersbourg 7:177–180īrinkmann A (1930) Über Nectonema munidae n. Zool Bidrag Uppsala 2:1–28īrandt JF (1848) Vorläufige Bemerkungen über eine neue, eigenthümliche, der Fauna Russlands angehörige Gattung oder Untergattung von Krabben (Crustacea Brachyura) aus der Edwards’schen Abtheilung der Corysten. Invertebr Biol 121:357–364īock S (1913) Zur Kenntnis von Nectonema und dessen systematischer Stellung. Nectonema species may have a broader range of host groups than previously suspected, but may have been previously misidentified as nematode parasites.īleidorn C, Schmidt-Rhaesa A, Garey JR (2002) Systematic relationships of Nematomorpha based on molecular and morphological data. agile from the northwestern Atlantic the 18S gene from these two taxa was divergent by 11.8% K2P distance, suggesting that they are different species.

In an 18S maximum-likelihood tree that included 24 nematomorph species, Nectonema sp.

For Nectonema sp., we describe and illustrate morphological features of the parasitic juvenile stage and present nucleotide sequences for the cytochrome c oxidase subunit I gene (COI or cox1 451 nt), 18S rRNA gene (1777 nt), and region spanning the internal transcribed spacer 1 (ITS1) and the 28S rRNA gene including the 5.8S rRNA gene and ITS2 (1218 nt in total). There was no correlation between the host body length and number of parasites.

Six infected isopods ( Natatolana japonensis) collected from 1425 m of depth in the Sea of Japan each contained one to seven (mean 2.33) nematomorphs in the body cavity in the pereon. This is also the third record of marine nematomorphs from the North Pacific. as the first record of a marine nematomorph parasitic in isopod crustaceans. Nectonema, the only horsehair worm (Nematomorpha) genus found in marine environments, was previously known to be parasitic only in decapod crustaceans.

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