Abstract：
Two new nematode species of the family Xyalidae were found in the intertidal zone of the Chinese coast, and they are described here as Daptonema sinica sp. nov. and Metadesmolaimus bulbosus sp. nov. Daptonema sinica sp. nov. is characterised by a relatively large body with a broad funnel-shaped buccal cavity; relatively long cephalic setae; a circular amphidial fovea posterior to the buccal cavity; slender spicules bending into a hook shape in the posterior half; a small plate-like gubernaculum without apophysis; and a conico-cylindrical slender tail with terminal setae. Metadesmolaimus bulbosus sp. nov. can be identified by its large buccal cavity, long cervical setae, multiple bulb-like pharyngeal muscular swellings, conico-cylindrical tail narrowing abruptly immediately posterior to the cloaca, straight clavated spicules with a broad proximal end and hooked distal end, and gubernaculum absent. An updated dichotomous key to the species of Metadesmolaimus is given.
摘要：
在中国海岸的潮间带发现了两种新的Xyalidae科线虫，它们在这里被描述为Daptonemasinicasp。11月。和Metadesmoleimusbulbosussp.11月。Daptonemasinicasp.11月。其特征是身体相对较大，具有宽大的漏斗状的颊腔；相对较长的头刚毛；颊腔后方的圆形两栖中央凹；细长的针骨在后半部弯曲成钩状；没有隆起的小板状针尖；以及带有末端刚毛的圆锥形圆柱形细长尾巴。Metadesmoleimusbulbosussp.11月。可以通过它巨大的口腔来识别，长颈刚毛，多个球茎样咽部肌肉肿胀,锥形圆柱形尾巴在泄殖腔后方突然变窄，具有宽近端和钩形远端的直锁骨针状体,和Gubernaculum缺席。给出了Metadesmoleimus物种的最新二分键。
