subcostal vein वाक्य
उदाहरण वाक्य
मोबाइल
- In the wing veins the species exhibit great conformity, the second subcostal vein, the upper median vein in the forewing as well as in the hindwing rise before the cell-end.
- Tephritids are small to medium-sized ( 2.5 10 mm ) flies that are often colourful, and usually with pictured wings, the subcostal vein curving forward at a right angle.
- Hindwing : costal margin broadly dark brownish; wing posteriorly from below the subcostal vein and vein 6a beautiful pale bluish-grey; a broad whitish streak beyond the cell not reaching the termen.
- In the hindwing the cell is possibly still shorter than in most of the other Eryrinidae; on the forewing the first subcostal vein branches off just before the cell-end, the second directly behind it.
- This genus is characterized by two of the five subcostal veins branching off before the apex of the cell, by the upper radial being only little united with the subcostal, and by the central discocellular being rather long.
- The anterior end of the sclerite is generally produced as a slender arm, the apex of which ( e ) is always associated with the base of the subcostal vein ( Sc ), though it is not united with the latter.
- Adults are dark shining grey with a red-brown streak at the end of the cell on the forewings, as well as some minute silvery specks along the costa, in the cell and interspace below the subcostal vein and along the outer margin.
- On the forewing the lowest subcostal vein and the uppermost radial vein rise from the same place; the cell is shorter than half the costal margin, the transverse vein runs rectilinearly, the upper median and lower radial rise from the lower cell-angle.
- Wing-venation : The subcostal vein merges into the anterior alar margin near its midpoint; radial vein 1 reaches the distal quarter of wings, there usually fused with radial vein 2 + 3; radial vein 4 is branched proximal to the anterior crossvein of the wing.
- It is formed by the union of the ascending lumbar veins with the right subcostal veins at the level of the 12th thoracic vertebra, ascending in the posterior mediastinum, and arching over the right main bronchus posteriorly at the root of the right lung to join the superior vena cava.
- There are black dots, particularly on the costal and subcostal veins and there is a black patch near the base and at the end of the cell, as well as an oblique blackish fascia at about one-third to halfway, reduced to a large patch in the fold.
- There is a rather dense irroration along the costa, the apex and termen, a spot at one-third under the subcostal vein, another one almost directly beneath in the fold ( somewhat more removed from the base ) and a confluent pair of spots at the end of the cell.
- Underside of hindwing : crimson spots more conspicuous, a line of crimson along the posterior portion of the dorsal margin; in most specimens the short subbasal narrow band of white that runs from the costa to the subcostal vein does not coalesce with the white of the discal band where it crosses the cell.
- The hindwings are often remarkably small, in the males often with tooth-like projections on the inner-marginal and lower median vein, above them mostly with a deeply concave excision, and between the upper radial and subcostal vein often with an obtuse projection; more rarely the hindwings are quite round.
- The forewings are crossed by a broad and somewhat irregular central belt, which is grey-brown towards the costa and enclosing a spot of the ground colour, but dark golden brown below the subcostal vein, crossed by pearl-grey veins with black extremities and transversed internally by a pale sinuous line.
- These fossil moths have similarly shaped wings and wing scales, with abundant microtrichia on the wing membrane, comparable with recent Micropterigidae species such as " Sabatinca " and " Micropteryx ", but differences from them by the lack of ocelli and the apparent absence of a branch of the subcostal vein.
- The first and second lumbar veins usually join the ascending lumbar vein rather than the inferior vena cava, which then joins the subcostal vein of the same side to form the azygous vein on the right or hemiazygous vein on the left . The third and fourth lumbar veins on the left pass behind the abdominal aorta to reach the inferior vena cava and " all " lie behind the sympathetic trunks.
- Hindwing in addition has a white basal streak that extends halfway down the dorsal margin; another shorter white subbasal streak from costa to the subcostal vein coalescent with the white of the discal band in the cell, the streak of ground colour that lies between this subbasal and the discal band jet black, interrupted where it crosses vein 8 by a crimson spot; finally, quadrate black spots near apex of cell and at bases of interspaces 1, 2 and 3, all outwardly margined with crimson.
- Forewing yellow, thickly freckled with orange; veins finely ferruginous; lines ferruginous brown, the median thick; all running more or less parallel to each other and to termen; the inner oblique outwards from costa to subcostal vein and again from vein 1 to inner margin where it touches the median; stigmata of the ground colour, with brown rings; the orbicular large, round; both with brown centres; submarginal line formed of disconnected pale lunules edged inwardly with darker; hindwing pale yellow;-" aurantiago"
- The forewings have the submedial vein ( vein 1 ) unbranched and in one subfamily forked near the base; the medial vein has three branches, veins 2, 3, and 4; veins 5 and 6 arise from the points of junction of the discocellulars; the subcostal vein and its continuation beyond the apex of cell, vein 7, has never more than four branches, veins 8 11; 8 and 9 always arise from vein 7, 10, and 11 sometimes from vein 7 but more often free, i . e ., given off by the subcostal vein before apex of the cell.
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