This new genus is rather similar to Hemeroscopus Pritykina,1977, but differs from the latter in the following characters:(1) hindwing anal loop is smaller, only with 6-7 cells;(2) Rspl is absent;(3) the hindwing vein CuAa is curved and has five distinct posterior branches;(4) the forewing MP is not shortened, reaching the posterior wing margin slightly beyond the level of the nodus;(5) pterostigmata more distinctly braced;(6) the hindwing area between MP and CuAa is narrow, with only one row of cells near the discoidal triangle.

新屬與巴依薩晝蜓HemeroscopusPritykina91久久精品国产91性色tv，1977在形態(tài)上比較相似外国人人操人人肏，但在演化程度上更為原始，主要體現(xiàn)在下面幾個(gè)方面：(1)后翅臀套較小国产熟女高精品裸交视频，僅有 6～ 7個(gè)翅室；(2 )徑增脈缺性插影院色插；(3)后翅CuAa脈彎曲欧美日韩精品巨乳中文字幕，帶有 5個(gè)明顯的后分支；(4 )前翅MP脈不顯短亚洲乱伦专区，終止于翅后緣近翅結(jié)處又大又粗的免费视频；(5 )翅痣下有一個(gè)明顯的支脈；(6 )后翅CuAa和MP域基部較窄色黄视频免费看，在三角室下方僅有 1排翅室在线精品视频播放。

Length 9mm, exhibition wing 20mm; body was pale green; first sudden cone, into the front, so called as Fulgoroidea; wings transparent, wings light brown mole.

體長(zhǎng)9mm，翅展20mm黄片无码免费不卡；身體呈淡綠色丝袜巨乳电影；頭突錐狀，伸向前方亚洲污污久久久久av，故稱之為象蠟蟬在线a亚洲视频播放在线观看；翅透明，翅痣淡褐色国产午夜在线精品三级三。

Firstly, the high resolution pictures of dragonfly wings from sample tests were studied thoroughly, and the unique feature of the reticulate vein distribution and the variation of the vein sizes and the grid shapes in different zones were figured out;then several computational models based on a dragonfly wing were established by using ANSYS, and beam 189 and shell 93 elements were used respectively in modeling of the veins and the membrane so as to ensure the compatibility between the veins and the membrane at a deformed state;these models subject to uniform loading cases were analyzed respectively so as to explore the unique performances of the wing structure, furthermore, through eigenvalue spectrum analyses of these models, the special role of the pterostigma in eliminating or suppressing the wing quivering effect was also evaluated.

首先www.麻豆视频.com，對(duì)實(shí)驗(yàn)中獲取的高清晰度的蜻蜓翅膀數(shù)碼圖片進(jìn)行了細(xì)致地分析，找出了翅膀網(wǎng)狀翅脈結(jié)構(gòu)中翅脈的分布規(guī)律與尺寸變化、網(wǎng)格形狀的差異及不同形狀網(wǎng)格的分布等獨(dú)特的結(jié)構(gòu)特征欧美一区精品视频一二区:；再利用ANSYS建立蜻蜒翅膀網(wǎng)狀翅脈結(jié)構(gòu)模型成年片色大黄全免费网站久久，采用三節(jié)點(diǎn)等參數(shù)梁元beam189模擬翅脈和八節(jié)點(diǎn)等參數(shù)曲殼單元shell93模擬翅膜，以滿足翅脈和翅膜間的變形協(xié)調(diào)性要求国产亚洲日韩在线人成；通過(guò)非線性數(shù)值分析欧美日韩精品福利在线观看，探索了蜻蜓翅膀網(wǎng)狀翅脈結(jié)構(gòu)在均布荷載作用下所具有的獨(dú)特的結(jié)構(gòu)性能；通過(guò)模態(tài)分析激情乱小说在线观看，揭示了翅膀前緣靠近翼尖附近的翅痣在翅膀消震減振中所發(fā)揮的作用国产黄特级视频A片。

ephemera：蜉蝣

如蜉蝣(ephemera)等. ②蜻蜒目(Odonata) 蟲(chóng)體多為大中型. 頭大,甚活動(dòng);復(fù)眼發(fā)達(dá)很大;觸角短,剛毛狀;口器咀嚼式. 翅兩對(duì),膜質(zhì)多脈,翅前緣近翅頂處常有翅痣. 腹部細(xì)長(zhǎng),雄性外生殖器生在腹部第二節(jié)上,尾須僅一節(jié). 半變態(tài),稚蟲(chóng)(俗稱水蠆)水生.

Mnais mneme Ris：煙翅綠色蟌

4 紅痣綠色蟌Mnais earnshawi Williamson | 5 煙翅綠色蟌Mnais mneme Ris | 6 細(xì)色蟌Vestalis sp.

Odonata：蜻蜒目

8.蜻蜒目(Odonata)咀嚼式口器,觸角短小剛毛狀,復(fù)眼大;翅兩對(duì),膜質(zhì)多脈,前翅前緣端有一翅痣;腹部細(xì)長(zhǎng);半變態(tài). 如蜻蜒,豆娘等. 9.半翅目(Hemiptera)體略扁平;多具翅,前翅為半鞘翅;口器刺吸式,通常4節(jié),著生在頭部的前端;觸角4或5節(jié);

pterostigma：翅痣

各翅均有一翅痣(pterostigma). 尾須小,只一節(jié). 白天活動(dòng),飛行敏捷而有力,可持續(xù)飛行頗長(zhǎng)時(shí)間,并能在飛行中捕捉其他昆蟲(chóng)為食. 若蟲(chóng)水生,其下唇特化成一捕食器官,稱為面罩(mask),用來(lái)捕食小型甲殼動(dòng)物和其他昆蟲(chóng). 不完全變態(tài).