A species of mermithid nematode was found parasitizing the larvae of Culex fatigans in the region of Xinyang County, Henan Province in 1984. It was ident- ified as a new species of the genus Roraanomerrais (Nematoda:M...A species of mermithid nematode was found parasitizing the larvae of Culex fatigans in the region of Xinyang County, Henan Province in 1984. It was ident- ified as a new species of the genus Roraanomerrais (Nematoda:Mermithidae),named Romanoraermis yunanesis. Besides the diagnostic feature of the genus, the main characters of this new species are: Female:Boby length 21.1mm (n=36, r=14.6-28.6, SE=0.49) .Width at the vagina 164 (n=33, r = 118-212, SE=4.05) . Vagina pear shaped the midway of Vaginal canal with a distinctive flexure: The anterior ovary is shorter than the posterior one. V=35.94845.9 (n=36, r=43 55, SE = 0.50) . Cuticle thicker, the cuticle thickness at the vagina 11.9,at the posterior end 22.6 (n=34, r=13.1 41.8, SE=1.36) . Male:Body length 14.1mm(n = 32,r = 7.8 17.6,SE = 0.37).Width at the midbody 120 (n=32, r=89-144, SE=2.42) .Two separate curved spicules are not uniform in length,the longer spicule length 339 (n=32,r=280 410, SE=5.6), ratio of body length to spicule length is 41.7 (n=32, r=27.6 51.5, SE=0.95),the shorter spicule length 327 (n=32, r=251 400, SE=6.9) ,Caudal papillae in three rows, the middle row with 34, lateral rows 22. Diagnosis: (1) R..yunanensis is separated from the other species of the genus with the exception of R.jingdeensis, R.wuchangensis, R.culicivorax and R.iyengari by the distinct flexure of its vagina. (2) It differs from R.culicivorax (25.2) and R. iyengari (26.2) and R.siehuanensis (22.7) in its larger ratio of body length to sp icule length (41.7) . (3) The position of the vulva is more anterior in R.yunan- ensis than in R.jingdeensis (P<0.01). Besides that, the length of two ovaries are not uniform in R. yunanensis (V=35.94845.9), but almost uniform in R.jingdeensis (V=4031.841) and the ratio of body length to spicule length in R.yunanensis is also larger than in R.jingdeensis (37.8).(4)The ratio of its body length to spicule length differs from that of R.wuchangensis (35.7)and the position of vulva is more anterior than that of R.wuchangensis (>50%), the two ovaries and two spicules are not uniform in length. They also differ from those of R.wuchangensis. Type Host and Locality∶Culex fatigans larvae are collected from the region of Xinyang. (Measurements are in micrometers unless otherwise noted. n=number of sp ecimens, r=range, SE=standard error.)展开更多
The Chinese alligator （Alligator sinensis） is a critically endangered species in China. Wild populations of Chinese alligator are on the edge of extinction. Through a release program, some captive-bred alligators wi...The Chinese alligator （Alligator sinensis） is a critically endangered species in China. Wild populations of Chinese alligator are on the edge of extinction. Through a release program, some captive-bred alligators will be selected and released into the wild to supplement and renew natural populations. The purpose of this study was to provide data to select healthy individuals for release. Through bacteriological and molecular identification, six different genera, eight species and an unclassified bacterium were identified in 13 bacterial strains, which were isolated from the cloaca of 25 Chinese alligators. One genus and four species were identified in eight bacterial strains, which were isolated from the water where the alligators live. According to the analysis, except for the unclassified bacterium, the other bacteria from the cloaca were not pathogenic and were different from the bacteria isolated from the water. Thus, it was concluded that the 24 Chinese alligators were healthy, and could be selected to be released into the wild. As subject AS 12 was identified carrying an unclassified bacteria, of which the characteristics were unknown, it was suggested that the AS 12 individual not be released.展开更多
文摘A species of mermithid nematode was found parasitizing the larvae of Culex fatigans in the region of Xinyang County, Henan Province in 1984. It was ident- ified as a new species of the genus Roraanomerrais (Nematoda:Mermithidae),named Romanoraermis yunanesis. Besides the diagnostic feature of the genus, the main characters of this new species are: Female:Boby length 21.1mm (n=36, r=14.6-28.6, SE=0.49) .Width at the vagina 164 (n=33, r = 118-212, SE=4.05) . Vagina pear shaped the midway of Vaginal canal with a distinctive flexure: The anterior ovary is shorter than the posterior one. V=35.94845.9 (n=36, r=43 55, SE = 0.50) . Cuticle thicker, the cuticle thickness at the vagina 11.9,at the posterior end 22.6 (n=34, r=13.1 41.8, SE=1.36) . Male:Body length 14.1mm(n = 32,r = 7.8 17.6,SE = 0.37).Width at the midbody 120 (n=32, r=89-144, SE=2.42) .Two separate curved spicules are not uniform in length,the longer spicule length 339 (n=32,r=280 410, SE=5.6), ratio of body length to spicule length is 41.7 (n=32, r=27.6 51.5, SE=0.95),the shorter spicule length 327 (n=32, r=251 400, SE=6.9) ,Caudal papillae in three rows, the middle row with 34, lateral rows 22. Diagnosis: (1) R..yunanensis is separated from the other species of the genus with the exception of R.jingdeensis, R.wuchangensis, R.culicivorax and R.iyengari by the distinct flexure of its vagina. (2) It differs from R.culicivorax (25.2) and R. iyengari (26.2) and R.siehuanensis (22.7) in its larger ratio of body length to sp icule length (41.7) . (3) The position of the vulva is more anterior in R.yunan- ensis than in R.jingdeensis (P<0.01). Besides that, the length of two ovaries are not uniform in R. yunanensis (V=35.94845.9), but almost uniform in R.jingdeensis (V=4031.841) and the ratio of body length to spicule length in R.yunanensis is also larger than in R.jingdeensis (37.8).(4)The ratio of its body length to spicule length differs from that of R.wuchangensis (35.7)and the position of vulva is more anterior than that of R.wuchangensis (>50%), the two ovaries and two spicules are not uniform in length. They also differ from those of R.wuchangensis. Type Host and Locality∶Culex fatigans larvae are collected from the region of Xinyang. (Measurements are in micrometers unless otherwise noted. n=number of sp ecimens, r=range, SE=standard error.)
基金The National Natural Science Foundation of China (30770312)the Fund for Releasing Chinese Alligators by the State Forestry Administration+1 种基金the Fund for Leading Scientist of Science and Technology in Anhuithe foundation of Key Laboratory of Biotic Environment and Ecological Safety in Anhui Province
文摘The Chinese alligator （Alligator sinensis） is a critically endangered species in China. Wild populations of Chinese alligator are on the edge of extinction. Through a release program, some captive-bred alligators will be selected and released into the wild to supplement and renew natural populations. The purpose of this study was to provide data to select healthy individuals for release. Through bacteriological and molecular identification, six different genera, eight species and an unclassified bacterium were identified in 13 bacterial strains, which were isolated from the cloaca of 25 Chinese alligators. One genus and four species were identified in eight bacterial strains, which were isolated from the water where the alligators live. According to the analysis, except for the unclassified bacterium, the other bacteria from the cloaca were not pathogenic and were different from the bacteria isolated from the water. Thus, it was concluded that the 24 Chinese alligators were healthy, and could be selected to be released into the wild. As subject AS 12 was identified carrying an unclassified bacteria, of which the characteristics were unknown, it was suggested that the AS 12 individual not be released.
