摘要
作者在黄海采集小型底栖动物时,发现了多毛类缨鳃虫科真管缨虫属一新种,命名为四节真管缨虫。新种与本属中其他种在肛凹部前腹刚毛节数和肛凹部本身刚毛节数有明显区别。
Most species of Sabellidae are macrofaunal and sessile, but also aspecies exist in this family. Some species in the genus Euchone are meicmeiofauna polychaete from Yellow Sea, a previously undeseribed specieswas found and described herein. Both holotype and paratypes are depositute of Oceanography, State Oceanic Administration, Qingdao. Euchone quadrisegmenta sp. nov. (fig1--2) Complete specimen up to 2. 9 mm long With 15 chaetigers inbranchial crown about 0. 7mm long, 0. 37 mm wide not including tcrown long, about 1/4 length of the body, consists of 7--8 radioles; all out 2/3 of their length (fig. 1, a). Collar shorter than branchial basis and about equallyon lateral and ventral sides; produced ventrally and separated middorsally. A slight ven-notch present on collar in addition to dorsal gap. Eyes absent. 8 thoracic chaetigers and 7minal chaetigers present. The last 3 abdominal chaetigers form anal depression; 4 ab-inal chaetigers preceding anal depression (fig. 1, b). postchaetal glandular ring presentsecond thoracic chaetiger and first abdomnal chaetiger; the later only visible after stain-First thoracic chaetiger only with notochaetae, 4--8 limbate chaetae and slightly shorteronet chaetae; without neurochaetae. Notochaetae on following chaetigers including longbate chaetae (fig. 1, c), subspatulate chaetae (fig. 2, a) and short bayonet chaetae (fig. 2,6--11 acicular uncini on thoracic neuropodia, with 2--3 longitudinal rows of teeth aboveain fang, each row with 4 teeth (fig. 2, c). 7--16 pectinate uncini on abdominal notopodia,ith about 7 longitudinal rows of 6--7 small teeth (fig. 2, d). Abdominal neurochaetae long,narrowly limbated. Eggs in chaetiger 4--7. Anal depression with slightly notched flange. Py-gidium conical, without any appendage. The number of abdominal chaetigers preceding the anal depression is considered as an im-portant specific character to separate small species with not more than 20 abdominalchaetigers in the genus Euchone. Euchone quadrisegmenta sp. nov. differs from other smallspecies
出处
《动物分类学报》
CSCD
1993年第3期257-261,共5页
Acta Zootaxonomica Sinica
基金
中国国家自然科学基金3897018号
联邦德国研技部资助~~
