Steinernema unicornum sp. n. (Panagrolaimomorpha: Steinernematidae), a new entomopathogenic nematode from Tierra del Fuego, Chile
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Morphology, new species, phylogeny, SEM, sequencing, taxonomyResumen
A new species of entomopathogenic nematode,
Steinernema unicornum sp. n., was isolated from a soil sample taken from the archipelago of Tierra del Fuego, southern Chile. The new species is characterised by a prominent, dorsally located, horn-like tooth on the cephalic extremity of the infective juvenile (a feature unique for the family); lateral field pattern of 2, 6, 8, 4 ridges; and morphometrics of the infective juvenile with body length of 732 (654-786) μm, excretory pore located 55 (48-62) μm posterior to the cephalic extremity, tail 60 (50-71) μm long, H% = 37 (24-49), E% = 91 (77-116) and a ratio = 25.4 (21.9-29.4). The first generation male has spicules 73 (60-82) μm long, gubernaculum 48 (44-52) μm long and SW% = 198 (184-217). The first generation female can be recognised by the presence of a series of transverse cuticular folds and ridges located immediately anterior and posterior to the vulva, the lack of a prominent post-anal swelling, and presence of a mucron-like projection on the tail tip. Sequences of the ITS and D2D3 regions of the ribosomal DNA confirm that S. unicornum sp. n. is a valid species.Descargas
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2012-11-06
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Steinernema unicornum sp. n. (Panagrolaimomorpha: Steinernematidae), a new entomopathogenic nematode from Tierra del Fuego, Chile. (2012). Journal of Nematode Morphology and Systematics, 12(2), J. Nematode Morphol. Syst., 12 (2): 113-131 (2009). https://revistaselectronicas.ujaen.es/index.php/jnms/article/view/779