Ficophagus fengi n. sp. (Nematoda: Aphelenchoididae), an associate of Ficus concinna in China

Summary A new nematode species was recovered from the figs of Ficus concinna from Xishuangbanna, Yunnan province, P.R. China. It is described herein as Ficophagus fengi n. sp. and is characterised by possessing the combined characters of a short post-uterine sac (6.4-9.7 μ m or 0.4-0.5 VBD long), an excretory pore located near head, amoeboid sperm, three pairs of subventral papillae on the male tail, rounded male tail tip without mucron, presence of gubernaculum (apophysis)-like structure, a rose-thorn-shaped spicule without a terminal cucullus, a rostrum with a slightly pointed tip, a conoid female tail with a small finger-like tip, and absence of crustaformeria. Ficophagus fengi n. sp. was separated from other sequenced species by differences in the partial small subunit (SSU) rRNA gene and D2-D3 expansion segments of the large subunit (LSU) rRNA gene. Phylogenetic analysis with LSU D2-D3 expansion segment sequences suggested that F. fengi n. sp. is clustered in a single highly supported monophyletic clade with F. virens and is sister to F. virens .