Chitambar J J, Mahato T R, McClure M A, Marino B D
J Nematol. 1997 Sep;29(3):329-35.
Hemicycliophora 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 (mum), 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 mum), stylet length (76-97 vs. 95-119 mum), 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 mum), lower Rvan value (9-15 vs. 16), and indistinct spetanatheca vs. distinct spermatheca.
双球半轮线虫新种（线虫纲：环线虫科）发现于亚利桑那州奥罗维尔市生物圈2号中心休耕农田地块的土壤中。该线虫物种的特征为：侧区横向条纹有连续且不规则的中断、环纹光滑、唇区呈圆形截断状且前缘圆润、有三个唇环、第一唇环在侧面隆起且变宽、唇盘呈圆顶状且隆起、口针长度（76 - 97微米）、VA%T值（30 - 59）、234 - 273个体环纹，以及尾部末端偏移、呈圆柱形至略呈圆锥形的尾尖。双球半轮线虫新种与阿曼半轮线虫最为相似，但在体宽（30 - 39对38 - 54微米）、口针长度（76 - 97对95 - 119微米）、排泄孔与食管基部之间的环纹数量更多（4 - 16对2）、尾尖长度（16 - 28对32微米）、较低的Rvan值（9 - 15对16）以及受精囊不明显与明显受精囊方面与之不同。
