Somatochlora calverti
Somatochlora calverti is a dragonfly of the family of dragonflies Falk ( Corduliidae ), which belong to the dragonfly ( Anisoptera ). The species is named after the entomologist Philip Powell Calvert. The females and larval stages have not yet been described.
Features
The males of Somatochlora calverti reach body lengths from 50.2 to 52.0 millimeters, of which 32 to 36 millimeters on the abdomen (abdomen ) accounts. The slim abdomen widens just after the half of the fourth segment about from the sixth to be close again. It is dark brown to the base of the third and tenth on the segment. The remaining parts of the abdomen shining slightly greenish black. The basic coloring is still a light yellow drawing which is made up as follows: We start with the rear, side edges of the first segment. In the second segment is the one a triangle similar spot on the lower two -thirds of the auricle covered, as well as a slightly smaller spot on the genital lobes. Finally, is located on this segment a dorsal, transverse to the abdomen extending stain. In the first two thirds of the third segment is located on the underside of a spot of two triangular patches at the end of the same on the top is flanked. The next part of the drawing is located on the tenth segment, and is made of a pointed, trapezoidal extending from the base segment patch. In addition, the Intersegmentalhäute between the fifth and ninth segment, as well as the edges of the tergites are yellowish. The first two and the fifth to ninth segments are set with amber-colored hairs. Selbige on the abdomen attachments are dark brown. The brownish black, upper abdomen attachments are about as long or slightly shorter than the ninth and tenth segment together. The distance between them is very low to the base. Towards the end they bulge out to one of approximately 50 ° downward, on the other inward. The lower attachments are slightly shorter than the upper.
The front segment of the thorax, the so-called pro-thorax is dark brown on the top and bottom, on the sides a little brighter. Its anterior and posterior lobes are yellowish white. The adjoining Synthorax is metallic green and violet shiny effect later. In the area of brown primed Episternums there is an approximately two and a half times a millimeter large, yellowish stain. More sharply defined yellowish spots are located on the sides of the thorax. The front spot is located on the Epimeron; the second is located at the base of the hind wing and extends up to the underside of the animal, where it meets the opposite side. The indentations in front of the other pair of wings are bright yellow.
The hip ( coxa ), and the leg ring ( trochanter ) are entirely with the front pair of legs, the middle and rear light yellow only on the rear side. The rest of all pairs of legs is dark brown or black. The typical for the species to the keel of the first pair of legs tibiae measures approximately 40% of the Tibienlänge.
The wings are transparent. The Membranula and about four and a half as long as wide Flügelmal ( pterostigma ) are like some parts of the Flügelnervatur brownish. Here, the rear pair of wings is 36-37 mm long and 10.8 to 11.0 mm wide. In the front wing are seven to eight Antenodaladern, in hind wings there are those five. The Postnodaladern the ratio is reversed. Here it is in the forewing five or six and seven in the rear wing. The wings triangles are divided by a vein and between M1 and M1a are located in the forewing 10-14 cells in hind wing 11 to 14
The head of Somatochlora calverti is about eight millimeters wide. The labium, the upper lip ( labrum ), the clypeus and sides of the frons are bright yellow. At the labrum, lower edge next to a dark spot on the top edge, dark brown. Similarly, the lower edge of the frons and their median strip is dark brown. The upper part is metallic blue-green. On the Postclypeus are small depressed brown dots. The Vertex is metallic purple and the occiput brownish black. The back of the head is black and filled to the edges with white hairs.
Dissemination
Somatochlora calverti occurs on the border with Alabama along the Gulf of Mexico in northern Florida. Individual findings have also been reported from Alabama and South Carolina.
Habitat and behavior
The holotype was caught in a pine forest. There the kind inhabited clearings and flying high between the tops together with Tramea Carolina. The same habitat also inhabit the types Somatochlora Filosa, Somatochlora provocans and Somatochlora linearis. When issuing preferred the kind of dead branches in two to four and a half meters in height.
Similar Species
Very similar to see the Somatochlora calverti the types Somatochlora Filosa, Somatochlora provocans and Somatochlora ozarkensis. However, the venation of the Costa Subcosta and Antenodaladern S. calverti is yellowish. The bright spots on the tenth segment are more pronounced here. Another good differentiator deliver the abdomen attachments. While those are swollen stronger than in S. Filosa in the middle, they are angled at p provocans and S. ozarkensis at the same place instead of puffy.