Description of Hemicycliophora biosphaera n. sp. from Arizona (Nemata: Criconematidae)
AbstractHemicycliophora biosphaera n. sp. (Nemata: Criconematidae) was found in soil from a fallow field plot within the Biosphere 2 Center, Oracle, Arizona. The nematode species is characterized by continuous and irregular breaks in transverse striae in the lateral field, smooth annules, a rounded-truncate lip region with rounded anterior margins, three lip annules, first labial annule elevated and widened laterally, dome-shaped and elevated labial disc, stylet length (76-97 ([mu]m), VA%T value (30-59), 234-273 body annules, and tail with a terminus offset, cylindrical to slightly conoid digit. Hemicycliophora biosphaera n. sp. most closely resembles H. armandae but differs from it in body width (30-39 vs. 38-54 [mu]m), stylet length (76-97 vs. 95-119 [mu]m), greater number of annules between the excretory pore and esophagus base (4-16 vs. 2), length of the tail terminal spike (16-28 vs. 32 [mu]m), lower Rvan value (9-15 vs. 16), and indistinct spetanatheca vs. distinct spermatheca. Key words: Arizona, Biosphere 2, Criconematidae, Hemicycliophora, armandae, Hemicycliophora biosphaera, morphology, nematode, new species, sheath nematode, taxonomy.
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