Lenisaphelenchus ulomae n. gen., n. sp. (Rhabditida: Aphelenchoididae) isolated from the body cavity of Uloma marseuli Nakane (Coleoptera: Tenebrionidae) from Japan
Lenisaphelenchus ulomae n. gen., n. sp. (Rhabditida: Aphelenchoididae) isolated from the body cavity of Uloma marseuli Nakane (Coleoptera: Tenebrionidae) from Japan
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DOI：
10.1163/15685411-bja10004
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发表时间：
2020-10-01
期刊：
影响因子：
1.2
通讯作者：
Hamaguchi, Keiko
中科院分区：
文献类型：
--
作者：
Kanzaki, Natsumi;Hamaguchi, Keiko
从麻麻拟黄甲虫越冬个体体腔中分离到一种新的虫寄生线虫。收藏于日本滋贺。线虫的特点是它的六个大小相等的嘴唇形成一个圆顶形状与身体轮廓连续。花柱粗中等，管腔宽，长两分长（圆锥+锥孔）和细长的卵圆形或梨形后脑，前部腺状。雄性针状体分离，有发育良好的髁状体、三角形的喙状体和光滑而强烈弯曲的胼胝体-层状复合体。羽骨或突骨不存在。有两对乳头状的男性生殖器乳头。雌性缺乏外阴后子宫囊，直肠和肛门似乎退化，尾巴呈锥形。该物种的类型学特征组合不符合任何目前公认的aphelenchoidid属，在某种程度上介于Ektaphelenchinae和Entaphelenchinae之间。分子系统发育分析表明，该线虫与Ektaphelenchoides （Ektaphelenchinae）和Peraphelenchus （Entaphelenchinae）均接近。因此，该线虫被描述和说明为Lenisaphelenchus ulonme n. gen., n. sp.，并暂定在Ektaphelenchinae。
A new aphelenchoidid entomoparasitic nematode was isolated from the body cavity of overwintering individuals of a tenebrionid beetle, Mina marseuli. collected at Shiga, Japan. The nematode is characterised by its six equal-sized lips forming a dome shape continuous with body contour. It has a moderately thick stylet, with wide lumen, a long two-part long (conus + conophore) and elongate oval or pear-shaped metacorpus with glandular anterior part. The male spicules are separate with a well-developed condylus, triangular rostrum and smoothly and strongly curved calomus-lamina complex. A gubernaculum or apophysis is absent. There are two pairs of papilliform male genital papillae. Females lack a post-vulval uterine sac, have a seemingly vestigial rectum and anus, and conical tail. The combination of the typological characters of the species does not fit any currently accepted aphelenchoidid genus and is somewhat intermediate between the Ektaphelenchinae and Entaphelenchinae. The molecular phylogenetic analysis also suggested that the nematode is close to both Ektaphelenchoides (Ektaphelenchinae) and Peraphelenchus (Entaphelenchinae). Thus, the nematode is described and illustrated as Lenisaphelenchus ulonme n. gen., n. sp. and tentatively placed in the Ektaphelenchinae.