The early Silurian Chongqing Lagerstätte(middle Telychian)yields exceptionally preserved articulated jawless and jawed fishes.Here,we describe a new eugaleaspiform(Galeaspida,jawless stem-Gnathostomata),Miaojiaas...The early Silurian Chongqing Lagerstätte(middle Telychian)yields exceptionally preserved articulated jawless and jawed fishes.Here,we describe a new eugaleaspiform(Galeaspida,jawless stem-Gnathostomata),Miaojiaaspis dichotomus gen.et sp.nov.,from the Chongqing Lagerstätte in Xiushan,Chongqing,China.The new form resembles Tujiaaspis vividus in the short medial dorsal canal,and the presence of the branching ends of the lateral transverse canal.They differ in that T.vividus has highly developed subordinate branches of the sensory canals that form a reticulate sensory canal system,and the median dorsal opening is more elongated.Our phylogenetic analysis recovers M.dichotomus and T.vividus as a monophyletic clade(Tujiaaspidae fam.nov.),which is supported by two synapomorphies:the short medial dorsal canal,and the branching ends of the lateral transverse canal.Tujiaaspidae forms a trichotomy with Shuyuidae and a clade comprising Anjiaspis,Sinogaleaspidae,Yongdongaspidae,and the‘eugaleaspid cluster’.The sensory canal patterns in galeaspids are compared to show the transformation sequence of the sensory canal system in Eugaleaspiformes.展开更多
A new species, Homidia mediofascia sp. nov., from West China is described. It is easily separated from the other Homidia species by the median longitudinal stripe from Th. Ⅱ to Abd. Ⅱ, the macrochaeta al on Abd. Ⅰ...A new species, Homidia mediofascia sp. nov., from West China is described. It is easily separated from the other Homidia species by the median longitudinal stripe from Th. Ⅱ to Abd. Ⅱ, the macrochaeta al on Abd. Ⅰ, 7＋7 macrochaetae on posterior side of Abd. Ⅳ, and four smooth setae on posterior side of the ventral tube. A table on characters of five closely related Homidia species is provided.展开更多
This paper reports two newly recorded species, Itaquascon placophorum Maucci, 1972 and Itaquascon umbellinae Barros, 1939, of the genus Itaquascon （Tardigrada; Hypsibiidae） from China in the first time. The specimen...This paper reports two newly recorded species, Itaquascon placophorum Maucci, 1972 and Itaquascon umbellinae Barros, 1939, of the genus Itaquascon （Tardigrada; Hypsibiidae） from China in the first time. The specimens of Itaquascon placophorum were collected from Tsinling Mountains （33°28′N, 108°29′E） at 2,040 m above the sea level and those ofltaquascon umbellinae from Taibai Mt. （34°21′N, 107°39′E） at 1,500 m above the sea level. All specimens are deposited at the College of Life Sciences, Shaanxi Normal University, China.展开更多
Homidia hexaseta sp. nov. is reported from Wuyanling National Nature Reserve, Zhejiang Province. This new species is characterized by colour pattern, 6 sutural macrochaeta on dorsal head, smooth seta L1 on labial base...Homidia hexaseta sp. nov. is reported from Wuyanling National Nature Reserve, Zhejiang Province. This new species is characterized by colour pattern, 6 sutural macrochaeta on dorsal head, smooth seta L1 on labial base, seta p4＋ present on Th. II, seta a2 present on medial Abd. III, seta B6 as macrochaeta on Abd. IV, setae Ae5-7 present on Abd. IV and subapical tooth of mucro obviously larger than apical one. A key to the Homidia species from Zhejiang Province is also provided.展开更多
A new species,Homidia unichaeta,sp.nov.from East China is described.It is characterized by colour pattern,only one posterior macrochaeta on Abd.IV,labial setae E and L1 smooth,seta pi spiny and slightly thinner and ab...A new species,Homidia unichaeta,sp.nov.from East China is described.It is characterized by colour pattern,only one posterior macrochaeta on Abd.IV,labial setae E and L1 smooth,seta pi spiny and slightly thinner and about 1.5 times as long as bs1 and bs2.The three similar species of Homidia are compared.展开更多
X-ray microanalysis was used to study the elemental composition of the shell of the freshwater testate amoeba Difflugia tuberspinifera Hu et al.,1997 collected from Mulan Lake,Hubei province,China in July 2003.The res...X-ray microanalysis was used to study the elemental composition of the shell of the freshwater testate amoeba Difflugia tuberspinifera Hu et al.,1997 collected from Mulan Lake,Hubei province,China in July 2003.The results show that the shell is composed of ten elements:Si in greater quantity;then Ca and Al;and traces of K,Na,Cl,Fe,Mg,S and P.The analysis of results suggests that D.tuberspinifera in elemental composition appears to occupy a middle position between marine and soil testate amoebae.展开更多
A new species Homidia zhangi sp. nov. is described from Dalei Mountain, Zhejiang Province. Illustrations and a table for distinguishing it from other two similar species are provided in present paper.
A new species, Allonychiurus songi sp. nov., and a new record species, Thalassaphorura lifouensis （Thibaud ＆ Weiner, 1997） in the tribe Thalassaphorurini, are described from Northeast China. The morphological descr...A new species, Allonychiurus songi sp. nov., and a new record species, Thalassaphorura lifouensis （Thibaud ＆ Weiner, 1997） in the tribe Thalassaphorurini, are described from Northeast China. The morphological descriptions and illustrations of the two species are provided.展开更多
[Objective]The aim of this study was to reveal the molecular evolutionary characteristics of dihydroflavonol 4-Reductase（DFR）—a key enzyme in anthocyanin synthesis pathway in Lamiidae plants.[Method]Based on DFR am...[Objective]The aim of this study was to reveal the molecular evolutionary characteristics of dihydroflavonol 4-Reductase（DFR）—a key enzyme in anthocyanin synthesis pathway in Lamiidae plants.[Method]Based on DFR amino acid and cDNA sequences released by NCBI,molecular evolution of DFR gene was analyzed with bioinformatic software.[Result]Seventeen plants fell into two major branches,Lamiidae and Liliidae.Most of the plants within a same family cluster assembled together,which basically accords with the morphological development of species.Prediction results based on selection pressure using MEGA,DNAsp and PAML software showed that DFR gene in Lamiidae plants underwent strong purifying selection pressure.[Conclusion]Our results laid basis for analyzing the molecular mechanism of enzymatic characteristics of DFR and of the anthocyanin synthesis pathway.展开更多
文摘The early Silurian Chongqing Lagerstätte(middle Telychian)yields exceptionally preserved articulated jawless and jawed fishes.Here,we describe a new eugaleaspiform(Galeaspida,jawless stem-Gnathostomata),Miaojiaaspis dichotomus gen.et sp.nov.,from the Chongqing Lagerstätte in Xiushan,Chongqing,China.The new form resembles Tujiaaspis vividus in the short medial dorsal canal,and the presence of the branching ends of the lateral transverse canal.They differ in that T.vividus has highly developed subordinate branches of the sensory canals that form a reticulate sensory canal system,and the median dorsal opening is more elongated.Our phylogenetic analysis recovers M.dichotomus and T.vividus as a monophyletic clade(Tujiaaspidae fam.nov.),which is supported by two synapomorphies:the short medial dorsal canal,and the branching ends of the lateral transverse canal.Tujiaaspidae forms a trichotomy with Shuyuidae and a clade comprising Anjiaspis,Sinogaleaspidae,Yongdongaspidae,and the‘eugaleaspid cluster’.The sensory canal patterns in galeaspids are compared to show the transformation sequence of the sensory canal system in Eugaleaspiformes.
文摘A new species, Homidia mediofascia sp. nov., from West China is described. It is easily separated from the other Homidia species by the median longitudinal stripe from Th. Ⅱ to Abd. Ⅱ, the macrochaeta al on Abd. Ⅰ, 7＋7 macrochaetae on posterior side of Abd. Ⅳ, and four smooth setae on posterior side of the ventral tube. A table on characters of five closely related Homidia species is provided.
基金the National Natural Science Foundation(No.30770254)scientific research foundation project of Shaanxi Institute of Education (No. 07KJ37Q)
文摘This paper reports two newly recorded species, Itaquascon placophorum Maucci, 1972 and Itaquascon umbellinae Barros, 1939, of the genus Itaquascon （Tardigrada; Hypsibiidae） from China in the first time. The specimens of Itaquascon placophorum were collected from Tsinling Mountains （33°28′N, 108°29′E） at 2,040 m above the sea level and those ofltaquascon umbellinae from Taibai Mt. （34°21′N, 107°39′E） at 1,500 m above the sea level. All specimens are deposited at the College of Life Sciences, Shaanxi Normal University, China.
基金supported by the Zhejiang Provincial Natural Science Foundation of China (Y3100278, Y3100149) the Zhejiang Provincial Department of Educational Foundation (Y200700872)
文摘Homidia hexaseta sp. nov. is reported from Wuyanling National Nature Reserve, Zhejiang Province. This new species is characterized by colour pattern, 6 sutural macrochaeta on dorsal head, smooth seta L1 on labial base, seta p4＋ present on Th. II, seta a2 present on medial Abd. III, seta B6 as macrochaeta on Abd. IV, setae Ae5-7 present on Abd. IV and subapical tooth of mucro obviously larger than apical one. A key to the Homidia species from Zhejiang Province is also provided.
基金supported by The Qingnian Foundation of Taizhou University (2010QN17)Zhejiang Provincial Natural Science Foundation of China (Y3100278)
文摘A new species,Homidia unichaeta,sp.nov.from East China is described.It is characterized by colour pattern,only one posterior macrochaeta on Abd.IV,labial setae E and L1 smooth,seta pi spiny and slightly thinner and about 1.5 times as long as bs1 and bs2.The three similar species of Homidia are compared.
文摘X-ray microanalysis was used to study the elemental composition of the shell of the freshwater testate amoeba Difflugia tuberspinifera Hu et al.,1997 collected from Mulan Lake,Hubei province,China in July 2003.The results show that the shell is composed of ten elements:Si in greater quantity;then Ca and Al;and traces of K,Na,Cl,Fe,Mg,S and P.The analysis of results suggests that D.tuberspinifera in elemental composition appears to occupy a middle position between marine and soil testate amoebae.
基金supported by Zhejiang Provincial Natural Science Foundation of China(Y3100278)
文摘A new species Homidia zhangi sp. nov. is described from Dalei Mountain, Zhejiang Province. Illustrations and a table for distinguishing it from other two similar species are provided in present paper.
基金supported by the National Basic Research Program of China (2010CB951304, 2012CB956103)the Knowledge Innovation Programs of Chinese Academy of Sciences (KZCX2-YW-BR-16)+1 种基金the National Natural Science Foundation of China (No. 41171047)Chinese Academy of Sciences Visiting Professorship for Senior Foreign Scientists (2012TIZ0016)
文摘A new species, Allonychiurus songi sp. nov., and a new record species, Thalassaphorura lifouensis （Thibaud ＆ Weiner, 1997） in the tribe Thalassaphorurini, are described from Northeast China. The morphological descriptions and illustrations of the two species are provided.
基金Supported by the Fundamental Research Funds for the Central Universities(SWJTU09BR208)~~
文摘[Objective]The aim of this study was to reveal the molecular evolutionary characteristics of dihydroflavonol 4-Reductase（DFR）—a key enzyme in anthocyanin synthesis pathway in Lamiidae plants.[Method]Based on DFR amino acid and cDNA sequences released by NCBI,molecular evolution of DFR gene was analyzed with bioinformatic software.[Result]Seventeen plants fell into two major branches,Lamiidae and Liliidae.Most of the plants within a same family cluster assembled together,which basically accords with the morphological development of species.Prediction results based on selection pressure using MEGA,DNAsp and PAML software showed that DFR gene in Lamiidae plants underwent strong purifying selection pressure.[Conclusion]Our results laid basis for analyzing the molecular mechanism of enzymatic characteristics of DFR and of the anthocyanin synthesis pathway.
