摘要
报道了采于湖北枣阳、武汉及湖南长沙等地稻田的八腱索属线虫一新种,命名为华中八腱索线虫(Octomyomermishuazhongensissp.nov.),描述了形态特征。
Octomyomermis huazhongensis was found in the paddy field of Zaoyang(32°10′N, 112°45′E),Wuhan(30°31′N, 114°20′E),Hubei Province and in Changsha (28°12′N,113°E),Hunan Province, in 1986~1990. Measurements are in micrometres unless otherwise indicated. L=body length,W=body width,HW=head width measured at the level of papillae,AW=width of body at anus; V=distance from mouth to vulva expressed as percentage of the total length. Octomyomermis huazhongensis sp.nov(figs.1~8) Adults:Body elongate,white in colour,mouth shifted slightly ventrad in position; six cephalic papillae arranged in one plane,without obvious cuticular fibers;eight hypodermal chords;amphids are bag or rod shaped,Vagina in barrel shaped vaginal canal straight,perpendicular to longitudinal axis of body;two separate spicules,spicules length:AW<2,genital papillae three rows, the middle row bifurcating before the cloaca,genital papillae arranged sparsely before the bifurcation and closely after it. Male: n =10 L. 14.61 mm(11.48~20.00, SE =0.56),HW.43.05(40.13~53.50, SE = 0.71) ,W. at nerve ring 112.80 (96.06~126.46, SE =1.00),W. at midbody region 188.99(138.54~241.98, SE =1.76),AW. 144.29(114.30~172.67, SE =1.36),giving ratios of 0.38∶1∶1.68∶1.28,amphids 13.58(12.16~14.59, SE =0.28)× 3.26 ( 1.22 ~6.54, SE =0.42);distance from nerve ring to anterior end 246.29 (211.73 ~283.33, SE =0.42),distance from nerve ring to anterior end:L=0.017(0.014~0.022, SE =0.0009),tail length 122.74(103.36~172.07, SE =1.52),L:tail length 119.31 (92.88~148.50, SE =4.98),spicules length 157.85(109.44~ 194.56, SE =1.54),ratio of L to spicules length is 94.12(65.31~132.04, SE = 1.51); ratio of spicules length to AW is 1.12(0.76~1.65, SE =0.16),genital papillae in three rows, the middle row with 11.1(7~16, SE =0.53),from the anterior to the bifurcation, each of both rows with 16.4(15~21, SE =0.48)from the posterior to the bifurcation;lateral rows with 27.2(22.5~35, SE =0.61),cuticle thickness at the middle of the body 11.56(6.54~24.32, SE =0.70),distance from oesophagus end to tip of tail 283.53(206.72~347.18, SE =2.22),b=1.02(1.00~1.03, SE =0.003),oesophagus is 97.4%(97%~97.8%)of the total body length. Female: n =12 L. 20.44 mm(16.8~25.5, SE =0.49),HW.52.18(44.6~57.4, SE =0.58);W.at nerve ring 122.73(98.2~133.9, SE =0.92);W. at vagina 213.9(186.2~ 274.1, SE =1.48),at the posterior end of the trophosome 88.32(40.8~140.3, SE = 1.37), giving ratios of 0.43∶1∶1.74∶0.72,amphid 13.84(11.5~16.6, SE =0.31)× 2.67 (1.9~5.1, SE =0.33),distance from nerve ring to anterior end 275.08(178.5~369.8, SE =1.84),distance from nerve ring to anterior end:L=0.014 (0.010 ~ 0.018), Vagina barrel shaped,Vaginal canal straight,V=49.20%(43.13~54.29%, SE =0.48),cuticle thickness at the vagina 11.07(6.4~16.6, SE = 0.50), distance from oesophagus ending to tip of tail 360.33(197.6~720.4, SE = 3.73), oesophagus is 98%(96%~99%) of the body length. Egg: n =20;elliptic,length 92.87(80~105, SE =1.84),width 82.0(75~90, SE =1.51). Pre parasitic juveniles:n=10 L 1087.94(988.92~1185.72, SE =19.96),greates body width 13.10(12.30~14.15, SE =0.21),Stylet length 19.28(18.45~20.30, SE =0.21),Posterior length 568.99(551.04~603.93, SE =7.59). Рost parasitic juveniles:n=2. Tail appendage length 92.5(80.105). Type specimens:holotype 1♂,allotype1♀,Paratype 9♂♂ and 11♀♀ are deposited in the College of Life Sciences of Central China Normal University, Wuhan. Diagnosis: The new species is clearly distinguished from other species of the genus in male’s particular genital papillae and tail shape. Genital papillae in three rows is divided into two pa
出处
《华中师范大学学报(自然科学版)》
CAS
CSCD
1996年第4期461-466,共6页
Journal of Central China Normal University:Natural Sciences
基金
国家自然科学基金