Erythrodiplax nivea
| Erythrodiplax nivea | ||||||||||||
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| Erythrodiplax nivea | ||||||||||||
| Borror , 1942 |
Erythrodiplax nivea 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 around São Paulo in Brazil .
features
The abdomen, which is between 20.5 and 23.0 millimeters long in males and 21.0 millimeters in length in females, is initially brown in the first two segments of both sexes . On the third segment, the brown tone on the underside becomes significantly darker towards the rear and then continues in segments four to nine dark brown to black. On the third segment there is a fine black stripe along the dorsal keel. The fourth to the ninth, on the other hand, have a yellow stripe on the side that widens slightly at the beginning and end. Like the abdominal appendages, the tenth segment of the abdomen is brown. With the aging process, the male turns black and only a brownish shimmering stripe remains on the third to eighth segment. The thorax is yellow-brown with a slightly darker surface on top. From the hip down, the legs are brown to the thigh ( femur ) and from there black. On the femora of the last pair of legs there are 13 spines that get shorter with increasing distance from the body. The dragonfly's head is brown on the back and metallic blue on the front, especially on the forehead. The mouthparts are brownish or yellow. The wings are transparent, except for a small brownish, opal-rimmed spot. The 3.7 millimeter large wing mark ( pterostigma ) is light brown. The length of the hind wings in the males is between 24.0 and 26.0 millimeters; in the female 26.0 millimeters.
Similar species
Erythrodiplax nivea is similar to Erythrodiplax hyalina and Erythrodiplax basalis avittata , but can be easily demarcated by the opal winged spot. In addition, the species is larger.
credentials
- ↑ a b c Donald Joyce Borror : A Revision of the Libelluline Genus Erythrodiplax (Odonata) [p. 134f], The Ohio State University, Columbus, 1942
Web link
- Erythrodiplax nivea inthe IUCN Red List of Threatened Species 2013.2. Posted by: von Ellenrieder, N., 2007. Retrieved February 19, 2014.