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suspensorium     
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  悬器
     Appendicular skeleton: pelvic girdle bone,neural complex spine and suspensorium are also varied in different fishes of the pattern of Hemibarbus.
     附肢骨骼中的腰带骨、脊椎骨中的复合神经骨和第4椎骨腹侧的悬器等也有不同之处。
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  相似匹配句对
     Appendicular skeleton: pelvic girdle bone,neural complex spine and suspensorium are also varied in different fishes of the pattern of Hemibarbus.
     附肢骨骼中的腰带骨、脊椎骨中的复合神经骨和第4椎骨腹侧的悬器等也有不同之处。
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  suspensorium
dubius suspensorium around the posterior joint between the hyomandibular and the neurocranium brings the jaws and the cheeks to coincide with those of O.
      
The latter stabilizes the maxillary arcade and the suspensorium and might relate to the ability to catch and swallow very large vigorous prey, such as siblings, shortly after metamorphosis.
      
Development of the cranium ofNeoceratodus forsteri, with a discussion of the suspensorium and the opercular apparatus in Dipnoi
      
The Booidea and the Caenophidia show a shift of the stapes-quadrate-articulation which is correlated with changes in the suspensorium as an adaptation to relatively larger prey.
      
InHeterandria formosa the suspensorium consists of 4 gonapophyses, 9 interhemal spines and a number of baseosts.
      
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A Triassic perleidid fish described here was collected by Mr. Jiang Dunchao from He Xian, S. E. Anhui province. It is an anterior half of fish preserved in a sandy marl, but unfortunately its exact horizon is not clear. Judging from the characters of the fossil and the matrix rock in which the fossil is embedded, it probably belongs to the Qinglong group of Lower Triassic.This fish has moderately elongate-fusiform body. The length of head including opercular apparatus is slightly smaller than maximum depth of...

A Triassic perleidid fish described here was collected by Mr. Jiang Dunchao from He Xian, S. E. Anhui province. It is an anterior half of fish preserved in a sandy marl, but unfortunately its exact horizon is not clear. Judging from the characters of the fossil and the matrix rock in which the fossil is embedded, it probably belongs to the Qinglong group of Lower Triassic.This fish has moderately elongate-fusiform body. The length of head including opercular apparatus is slightly smaller than maximum depth of body. The head is comparatively short and its length is 42 mm. The maximum depth of body is 45 mm. The snout appears to be very obtuse. The orbits are very large and anteriorly placed. The suspensorium is almost vertical. The bones of the cheek region and opercular apparatus are indicated by impressions, exhibiting the characters of Perleidus. The preopercular is very large and has nearly straight anterior and posterior borders. The maxilla is of palaeoniscoid shape. The dentition is rather robust and consists partly of pointed teeth and partly of crushing teeth. The former are situated mainly in the anterior, the latter in the posterior parts of the jaws. The external skull-bones at least both maxilla and mandible ornamented with tubercles of enamel.The body is covered with thick rhombic scales with enamel, their posterior margins are obtusely serrated. The peg-and-sock articulations of scales on the anterior flank are well developed.From the characters of the fish described above, it is quite obvious that this fish belongs to Perleidus, and is most akin to Perleidus piveteaui Lehman in the size of head, inclination of suspensorium, short postorbital part of maxilla and the pattern of the opercular apparatus etc., but it differs distinctly from P. piveteaui in the following combination of characters: Ventral border of preoperculum not concave towards the rear. Postorbital part of maxilla very short, its length (distance between posterior extremity of maxilla and vertical passing anterior border of preoperculum) less than third of total length of maxilla. Maxilla with relatively low postorbital part and slightly convex dentigerous border. External skull-bones with prominent tubercles of enamel. The exposed area of scales on the anterior flank with longitudinal ridges and grooves running to the postterior border. It differs distinctly from all known species. Therefore, a new species Perleidus yangtzensis is established.Perleidus is a Triassic fish which occurred in the lower Trias of Madagascar, Greenland, Spitzbergen and in M.-U. Trias of Europe and in Trias of W. Africa. It is also found in the Triassic deposits of China. All of the facts stated above showed that Perleidus had a world-wide distribution during the Triassic period.

本文记述了在安徽和县发现的裂齿鱼属一新种——扬子裂齿鱼(Perleidus yangtzensis,sp.nov.)。根据其形态特征,与相近的种作了对比,认为和马达加斯加早三迭世的皮氏裂齿鱼(P.pivetcaui)最为接近。从而认为含鱼化石地层的时代为三迭纪或可能为早三迭世。

A new palaeoniscid genus and species,Triassodus yanchangensis,from the Ton-chuan Formation(Upper Triassic)of Yao Xian,North Shaanxi,is described.It at-tains a total length of 14—23cm,having elegantly fusiform body and large orbit an-teriorly placed.The greatest depth of the body,which is about 1/4.4 in the total length,is larger than the length of the head including opercular apparatus.The measurementsof the holotype are given in the text.The characters of the skull-bones and all the fins resemble those of Turseolus...

A new palaeoniscid genus and species,Triassodus yanchangensis,from the Ton-chuan Formation(Upper Triassic)of Yao Xian,North Shaanxi,is described.It at-tains a total length of 14—23cm,having elegantly fusiform body and large orbit an-teriorly placed.The greatest depth of the body,which is about 1/4.4 in the total length,is larger than the length of the head including opercular apparatus.The measurementsof the holotype are given in the text.The characters of the skull-bones and all the fins resemble those of Turseolus andShuniscus.Suspensorium oblique and mouth gape deep.Snout obtuse and single largepostrostral separating nasals.Circumorbital series consisting of supraorbital,three or fourinfraorbitals,anterorbital,and nasal.About two suborbitals present in front of thepreopercular.Single dermohyal present.Maxillary of Palaeoniscoid shape.Mandiblerobust,with broad symphysis,its outside ornamented with fine diagonal ridges.Maxil-lary and dentary with small pointed teeth.Operculum considerably larger than suboper-culum,much deeper than wide.Cleithrum and supracleithrum well developed,the latterwith diagonal ridges.Pectoral fin large,horizontal,consisting of about 20 lepidotrichiawhich not segmented proximally and bifurcated distally.Pelvic fin nearer pectoral thananal fin,cnsisting of about 2 unbranched and 20 branched lepidotrichia which segmentedcompletely.Dorsal fin remote,its origin slightly before that of anal fin,triangular,including about 2 unbranched and branched 20 lepidotrichia,wrich are segmentedthroughout.Anal fin long-based,with concave ventral margin,consisting of about 2unbranched and 53 branched lepidotrichia,which are segmented completely.Caudalfin heterocercal,deep cleft,nearly equilobate,cnsisting of about 60 lepidotrichia.Fulcraof moderate size and present on all the fins.Seales small,rhombic,and ornamentedwith diagonal ridges. The general characters of Triassodus resemble Turseodus Leidy and Shuniscus Su,but Triassodus differs from Turseodus in the following combination of characters:pos-trostral comparatively large,saddle-shaped.Cheek region(the distance between theorbit and the opercular)rather broad.Preopercular-maxillary angle much larger(ca-45°).The postorbital part of the maxillary relatively long and anterior part of thebone meeting the fellow below the rostrum.Branchiostegal rays few in number.Dermalbones ornamented with prominent tubercles or ridges of enamel.Anal fin long-based,butless than skull length.Scales more or less pectinated at the hind border,appear to bedestitute of dorsal articular process.Shuniscus differs from Triassodus in the followingcharacters:Body small.Preopercular-maxillary angle much smaller(ca.35°).Maxillaryexcluded from snout,not meeting the fellow below the rostrum.Ornamention on der-mal bones very weak.Supracleithrum short,stout and fusiform.Cleithrum with at-tenuated dorsal extension.Pelvic,dorsal and anal fins with comparatively long bases.The rays of all the fins sparsely segmented.Fin-fulcra very small,only present on un-paired fins.Scales without diagonal ridges,and with smooth posterior border.Triassodus retains the basic Palaeoniscoid condition.It is a typically fusiform fishwith strongly heterocercal tail,rhomboidal,enamel-covered scales and an oblique su-spensorium.Triassodus also exhibits some advanced characters,for instance,the lepido-trichia of tre pectoral fins unjointed poximally;Pelvic fins anteriorly placed;Caudalfin nearly equilobate cte.All these show the same characters as Turseodus and Shunis-cus.This new discovery is of great interest in the studying of the stratigraphic andgeographic distribution of fishes during the Late Triassic age.An interesting form ofPalaeoniscoids,Fukangichthys longidorsalis which was discovered(Su,1978)from theKaramy Formation(Upper Triassic)in Xinjiang(Sinkiang),bears characters closelyresembling Tanaocrossus kalliokoskii from the Chinle Formation of the United states.Another gracile Palaeoniscoid fish,Shuniscus longianalis which was discovered(Su,1983)from the Xujiahe Formation(Upper Triassic)in Sichuan,exhibits characters resem-bling Turseodus from the Chinle Formation and Newark Group in United States.Thediscovery of Triassodus and specimen of Coelacanths from the Tonchuan Formation ofNorth Shaanxi has further indicated the resemblance between the Upper Triassie fishfauna in Eastern Asia and North America.

本文记述了在陕西北部耀县铜川组发现的古鳕科一新属、种——延长三叠鳕(Triassodusyanchangensis,gen.et sp.nov.)。在对其形态特征作较详细描述的基础上,认为它既与美国晚三叠世的吐鲁瑟欧鳕(Turseodus)很接近,又与我国四川须家河组(晚三叠世)的蜀鳕(Sh-uniscus)相似。基于上述的理由,认为铜川组的时代是晚三叠世。根据迄今在我国晓三叠世发现的鱼类,探讨了我国晚三叠世的鱼群与北美的关系。

Described in this paper is a neolepidotid fish, which is considered to be a new species——Neolepidotes liaodongensis. The material was collected by Mr. Li Guoqing and the author from Xiahuapidianzi Formation, Xinbin County, Liaoning Province. Diagnosis Small fish with fusiform hody. Maximum body depth before anterior border of dorsal fin, body length about 2.8-3.3 times of body depth and 3.0-3.5 times of head length. Parietal large, its length about 2/3 that of frontal Mouth small. Mandible with high coronoid...

Described in this paper is a neolepidotid fish, which is considered to be a new species——Neolepidotes liaodongensis. The material was collected by Mr. Li Guoqing and the author from Xiahuapidianzi Formation, Xinbin County, Liaoning Province. Diagnosis Small fish with fusiform hody. Maximum body depth before anterior border of dorsal fin, body length about 2.8-3.3 times of body depth and 3.0-3.5 times of head length. Parietal large, its length about 2/3 that of frontal Mouth small. Mandible with high coronoid process. Marginal and inner teeth styliform. Orbit moderate size. About seven infraorbitals, of which two antorbitals, only one suborbital seen. Mandibular suspensorium slightly inclined forwards and quadrate articulation beneath middle pare of orbit. Operculum large, deeper than wide. Suboperculum nearly triangular. Interoperculum small. Preoperculum cresent, lower limb broad and forwards long. Superaorbital sensory canal posteriorly united with infraorbital canal. Vertebral centra well ossified. Pectoral fins low situated. Ventral fins abdominal. Dorsal fin situated well forwards with its anterior border in front of the ventrals, Anal fin remote. Caudal fin hemihetroceral and slightly forked. Caudal body-lobe short. No fringing fulcra. Fin ray formula: D. 9; A. 5; P. 12; V. 5; C. 14. Scales rhombic, smooth. Flank scales united in peg and socket articulation and with their overlapped margin produced forwards at the dorso-anterior as prongs. Scale formula: 28-30. Dorsal and ventral ridge scales inconspicuous. Remarks The material described here is quite similar to N. yungkangensis from the Guantou Formation, Zhejiang Province. However, it differs from the type species of Neolepidotes in body form and proportions, marginal teeth and dorsal ridge scales. For this reason, our neolepidotid fish is recognized as a new species. The above mentioned characters also indicate that Neolepidotes is different from the wellknown Lepidotes. Of the Late Jurassic-Early Cretaceous fish fauna, four genera (Sinamia, lkcechaoamia, Huashia, and Neolepidotes) are known both from northern and southeastern China, but no worldwide distributed lepidotid fish has been found yet; this indicates that the fossil fishes of these two regions are closety related and somewhat endemic.

本文记述了产自辽宁东部红庙子盆地下桦皮甸子组的新鳞齿鱼属—新种——Neolepidotes liaodongensis sp. nov..根据新材料,将 Neolepidotes 与 Lepidotes 等属作了补充比较,增订了新鳞齿鱼属的特征.

 
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