Oligoclada crocogaster
| Oligoclada crocogaster | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Oligoclada crocogaster | ||||||||||||
| Borror , 1931 |
The Oligoclada crocogaster is one of the 24 dragonfly species of the genus Oligoclada from the subfamily Brachydiplacinae . The species is distributed along the Rio Madeira and after its mouth along the Amazon .
Construction of the Imago
The abdomen measures between 14.0 and 15.9 millimeters in Oligoclada crocogaster males. In females, it is slightly shorter at 13.0 to 15.0 millimeters. The underside of the abdomen is yellowish to orange in the males on the seventh segment , and orange to red on the eighth and ninth segments . The abdomen of the female, however, like her thorax, is metallic blue-violet with a light blue dust coating. The female abdomen is also much more cylindrical and thicker than that of the male. This goes so far that the fourth to sixth segments are almost as long as they are wide. The corresponding segments of the males, however, are about twice as long as they are wide. In comparison with the lower, clearly longer upper abdominal appendages of the males, the species can be differentiated from Oligoclada amphinome , in which both are equally long. The thorax of the males is dark blue and appears to be covered with fine dust. The transparent hind wings measure between 17.5 and 20.2 millimeters in the males. The hind wings of the females are somewhat larger with 19.2 to 22.0 millimeters. The wing mark ( pterostigma ) reaches 1.5 to 2.1 millimeters in the males and 1.3 to 2.1 millimeters in the females. The number of anterodal veins is eight to nine and a half in the fore wing, and six to eight in the hind wing. The last antenodal loader in the front wing is only complete in a third of the cases, so it extends from the costal loader to the radial artery . There are six to nine and six to eight post-nodal veins. In the female, the area of the anal field is colored yellowish brown.
habitat
The animals' habitat are small streams in the tropical rainforest . They sit there on leaves looking for prey.
Research history
The species was first described in 1931 by Donald Joyce Borror using an animal from Belém .
credentials
- ↑ Martin Schorr, Dr. Martin Lindeboom and Dr. Dennis Paulson: World List of Odonata - Libellulidae. (No longer available online.) In: World List of Odonata (2009). Archived from the original on October 6, 2008 ; Retrieved May 29, 2009 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ a b c d Donald J. Borror - The genus Oligoclada (Odonata) , 1931, Miscellaneous Publications 22
