1Laboratory of Molecular Reproductive Biology, Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka, 52-1, Yada, Suruga-ku, Shizuoka, 422-8526, Japan. .
3Industrial Technology Center of Wakayama Prefecture /60 Ogura, Wakayama-shi, Wakayama 649-6261, Japan. .
Zootaxa. 2023 Mar 10;5254(2):245-256. doi: 10.11646/zootaxa.5254.2.5.
Enchytraeus ohtakai sp. nov. (Enchytraeidae, Clitellata, Oligochaeta) was discovered in the organic matter of a wastewater treatment facility of a plums processing plant in Honshu, Japan. The wastewater is characterized by high organic matter content and low salt concentration. Morphological analysis and DNA-sequencing of a fragment of the COI barcoding gene show that the new species belongs to the E. albidus species group. Within this group it differs in: vasa deferentia restricted to XII, preclitellar bundles with mostly three chaetae, postclitellar bundles with two or three, dorsal blood vessel from XII or XIII, spermathecal ectal duct completely glandular. spermatheca with a large diverticulum, accessory sexual glands present in XII, clitellum ventrally almost absent. The individual gene trees of COI analysis recovered this new species as a monophyletic group within the genus Enchytraeus, closely related to E. albidus species group.
奥氏长尾蚓新种（正蚓科，环带目，寡毛纲）发现于日本本州一个梅子加工厂废水处理设施的有机物中。该废水的特点是有机物含量高，盐浓度低。形态分析和 COI 条形码基因片段的 DNA 测序表明，该新种属于 E. albidus 种组。在该种组内，它与其他种的区别在于：精巢囊止于 XII，受精囊前索具三列刚毛，受精囊后索具二列或三列，背血管始于 XII 或 XIII，精囊外导管完全具腺质，精囊具大的膨大部，交接腺存在于 XII，环带腹面几乎缺失。COI 分析的个体基因树将这个新种作为一个单系群恢复在正蚓属内，与 E. albidus 种组密切相关。
