Tauriphila argo
| Tauriphila argo | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Tauriphila argo | ||||||||||||
| ( Hagen , 1869) |
The Tauriphila argo is one of the five dragonfly species of the genus Tauriphila from the subfamily Pantalinae . It occurs in South America .
features
Construction of the Imago
The body of Tauriphila argo is red like the face. The base color - red - is whitewashed with metallic violet on the forehead and the apex. The abdomen is around 30 millimeters long. On the approximately 36 millimeter long rear wing there is a large, dark brown spot at the base that extends into the anal angle . Except for the grayish tip, the wing is otherwise transparent. The wing mark ( pterostigma ) measures 2.5 millimeters.
Construction of the larva
In the last larval stage of Tauriohila argo , the larva is light brown and has a very broad head compared to the thorax . The head almost reaches the width of the abdomen and is up to 6.2 millimeters wide in the exuvia . On the dorsal side, the front edge of the head is rounded, with the very large complex eyes on the edge adapting perfectly to this curve. At the side edges, the eyes slightly outline the head and thus continue the curve a little further. The antennas consist of seven segments and are long and thin. When hatched, they have a length of 3.5 millimeters. The occiput is pronounced and tapers backwards, leaving an almost straight line at the rear edge. The Occiput is studded with small bristles. The catch mask is large compared to the rest of the body. On the dorsal side of the mentum there are two rows of bristles. The side of the mentum facing away from the body, the so-called ligula, is also covered with small bristles that increase in size towards the tip. There are eight bristles on the outside hairless palpus , which are located near the joint to the mentum. On the distal side of the palpus there are inconspicuous asymmetrical teeth that are covered with tiny bristles.
The foremost segment of the thorax, the prothorax, is well developed in contrast to the moderately developed pronotum . The openings in the respiratory system are also well formed. The edges of the wing sheaths are almost parallel and reach the edge of the sixth segment. The plump legs are very long, with the pair of legs that attach to the mesothorax even reaching the anal pyramid . The rear pair of legs reaches a length of 17.9 millimeters. The claws on the feet ( tarsi ) are thin and long.
The edges of the abdomen, measuring 6.5 millimeters when hatched, are curved outwards on both sides. On the eighth and ninth segment find Lateraldornen , with that of the eighth segment up to the rear edge of the tenth tergites enough. The spine of the ninth segment is even longer and protrudes over the last three segments of the abdomen. Dorsal spines are also present on segments three to eight . The paired side plates (ventrolateral plates) of the eleventh abdominal segment, the so-called paraproct , are significantly longer than the unpaired dorsal plate of the eleventh abdominal segment, the so-called epiproct .
The total length of the larva when hatched is 17.9 millimeters including the anal pyramid but without antennas and catching mask.
credentials
- ↑ Friedrich Ris: New contribution to the knowledge of the odonate fauna of Argentina . (pdf) In: Société royale d'entomologie de Belgique. Mémoires . 22, 1913, pp. 55-124. Retrieved May 22, 2009.
- ↑ Friedrich Ris: Libellulins . (pdf) In: Selys-Longchamps, Edmond de, baron, 1813-1900. Collections zoologiques; catalog systematique et descriptif . 3, 1913, pp. 1125-1126. Retrieved May 22, 2009.
- ↑ Günther Fleck, Manuela Brenk & Bernhard Misof: DNA Taxonomy and the identification of immature insect stages: the true larva of Tauriphila argo (Hagen 1869) (Odonata: Anisoptera: Libellulidae) . (pdf) In: Ann. soc. entomol. Fr. (ns) . 42, No. 1, 2006, pp. 91-98. Retrieved January 5, 2008.