Erythrodiplax clitella
| Erythrodiplax clitella | ||||||||||||
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| Scientific name | ||||||||||||
| Erythrodiplax clitella | ||||||||||||
| Borror , 1942 |
Erythrodiplax clitella is a species of dragonfly from the subfamily Sympetrinae . It was described in 1942 by Borror in his revision of the genus and classified in the Basalis group . The species occurs on the coast of Venezuela . There is another find from the north of Chile , but this was questioned by Borror as early as 1942. With the species name clitella he alludes to the shape of the white-dusted area on the abdomen of the adult males.
features
The abdomen, which is between 17.0 and 20.0 millimeters long in the males and between 16.0 and 17.0 millimeters long in the females, is initially light brown in both sexes and darker in the region of the keel. There is an indicated stripe on the side, which, however , is interrupted in the front parts of segments three to five. The stripe is somewhat more pronounced on segments seven to nine than in the rest of the course. On the eighth and ninth segments there is also a dorsal stripe. The abdominal appendages , like the tenth segment, are brown. The thorax , like the legs, is patterned yellow and brown. The face is brownish with a slight metallic blue tinge. This coloring changes with age. The abdomen and the abdominal appendages turn brown to black and segments four to seven, plus part of the third, are covered with a dust-like bluish white. The thorax also turns brownish black on the back, while on the side it takes on a dark green pattern with black markings. The blue sheen asserts itself on the face and takes on a blue-black color. The wings are transparent, except for a small yellowish (young animals) to brown-black spot at the base. The wingtip is seldom turned slightly brown. The length of the hind wings in the males is between 21.0 and 24.0 millimeters; in the female between 20.5 and 21.0 millimeters. The wing mark ( pterostigma ) is around 2.8 millimeters.
Similar species
Erythrodiplax melanorubra and Erythrodiplax fusca are particularly similar , although a reliable distinction can only be made on the basis of the penis structure . The somewhat flatter forehead area of E. clitella can be used as an indication. Another clear indication is the dust-like drawing of the abdomen. In the females, Erythrodiplax basalis is added to the species already mentioned . Here, too, separation is almost only possible on the basis of the structure of the genital organs.
credentials
- ↑ a b c Donald Joyce Borror : A Revision of the Libelluline Genus Erythrodiplax (Odonata) [p. 126f], The Ohio State University, Columbus, 1942