中国跃蛃属(石蛃目,石蛃科)一新种记述(英文)

A NEW SPECIES OF THE GENUS PEDETONTINUS (MICROCORYPHIA, MACHILIDAE) FROM CHINA

记述采自江苏南京跃蛃属 1 新种,老山跃蛃Pedetontinus laoshanensis sp. nov.,通过扩增其线粒体 C O Ⅰ基因,与中国已知跃蛃属其它物种进行遗传距离比较,并构建系统发生树,发现其与天目跃蛃 P. tianmuensis 和武当跃蛃较为接近,这也更加支持了基于形态证据的系统发生关系。并提供了跃蛃属已知 19 种的检索表。老山跃蛃,新种 Pedetontinus laoshanensis sp. nov. ( 图 1 ～17)体长 7. 0 ～9. 0 mm,复眼长/宽为 0. 99 ～1. 00,中连线/长为 0. 50 ～ 0. 55,复眼近中连线具浅色白斑,阳基侧突为1 + 6型,阳茎基节 / 端节为 2. 4,阳茎和阳基侧突位于第Ⅸ肢基片的 1/2,产卵管初级型,其长略超第Ⅸ腹节的刺突端刺。前产卵管,分 49 ～50 节,后产卵管,分 47 ～ 50 节。该物种C O Ⅰ基因信息见 GenBank No. EU699175 ～ EU 699177。新种与泰山跃蛃 P. songi、天目跃蛃 P. tianmuensis 和武当跃蛃 P. wudangensis 相似,但复眼中连线/长、阳茎基节/端节、阳茎和阳基侧突位置、产卵管分节具明显区别。基于 COⅠ基因序列构建 BI、MP 和 NJ系统发生树均有效证明老山跃蛃 P. laoshanensis 为单系群。基于 K2p 模型,新种与中国跃蛃属其它物种的遗传距离比较,与天目跃蛃 P.tianmuensis 遗传距离最小 9. 7 % ,与栾川跃蛃 P. luanchuanensis遗传距离最大12. 1 %。结合形态和分子数据证明该物种的有效性。正模♂ ,江苏南京老山 ( 32°07' N,118°36' E; 海拔145 m) ,2004-08-01,李鹏、张加勇采,编号 ZJNU SB050。词源: 新种种名源自采集地地名。

Pedetontinus laoshanensis sp. nov. is described fromJiangsu Province, China. It is characterized by the parameres of 1 ＋ 6 divisions and the ratio of length to basal width of urosternite V about 2/3. It is closely related to P. tianmuensis, P. taishanensis and P. wudangensis, but differs in the ratio of length to width of compound eye, the number of division of gonapophysis, the extending position of penis and parameres, and the ratio of basal part to terminal part of penis. The updated key to the species of Pedetontinus in the world is provided. We also examined the inter-species relationships of Chinese Pedetantinus based on partial sequences of mitochondrial cytochrome c oxidase subunit I （ CO I ）. GO I gene sequences using Kimura＇s two parameter model showed intraspecies genetic divergence （ 〈 1.3 % ） and interspecies divergence ranged from 9. 6 % to 15.4 %. The molecular study fiarther supported the species status of P. laoshanensis sp. nov.