Parapoynx stagnalis
Parapoynx stagnalis
Parapoynx stagnalis is ( Crambidae ) is a butterfly of the family of Crambiden.
Features
The moths reach a wingspan of 12 mm in males and 20 mm in females. The forewings are white, a Proximallinie is not created. The Diskozellularfleck is divided into two black spots. The Distallinie is yellow and curved. The Submarginallinie is blurry and yellowish. The Submarginalbereich is edged with white and indistinct gray.
The genital armature of the males is quite small. Uncus and Gnathos are small. The Gnathos is not perforated. The Valven are parallel walls and in the center bent sharply upward, special features are not available. The juxtaposition is oval. The phallus is slim and has no Cornuti. The bulb ejaculatory center opens.
In females, the Oviscapter is slim and relatively short. It is provided with dilated basal apophyses. The duct bursae is relatively short and has a broad Colliculum. The corpus bursae is oval and has a Signum, which is located in a rectangular, strongly sclerotized area. It consists of two parallel, narrow, sclerotized combing.
The adult caterpillar is pale green, slightly translucent, and about 15 millimeters long. The green digestive tract is clearly visible through the semi-transparent skin. The head and the first Thorakalsegment are pale brown and fitted with brown spots. The caterpillar is equipped with six rows of delicate branched tracheal gills.
The egg is round and flat. It is colored yellow.
Similar Species
A similar type is Parapoynx fluctuosalis.
Dissemination
Parapoynx stagnalis occurs in Africa, including Madagascar. In the north of the distribution area ( Cadiz Gibraltar, ) extends to Spain. The species was introduced into England, where it was found in greenhouses for tropical aquatic plants. It is also widespread in the Oriental, the Australis and the Neotropics.
Biology
The females lay about 50 eggs, which according to other sources individually in rows, on the underside of leaves of the host plants are attached. The egg stage is very brief and lasts for two to six days, an average of about three days. The young caterpillars are pale cream-colored, only the head and the first Thorakalsegment are yellow. They have tubular tracheal gills. The caterpillars live in enclosures that are made of grass pieces. The most important host plant, rice (Oryza sativa). Other host plants are scrobiculatum hemitomum Panicum, Panicum distachyum, Panicum repens, Echinochloa colonum, barnyardgrass ( Echinochloa crus- galli ), Eragrostis interrupta and Paspalum. The larval stage is 14 to 20 days. Before pupation the caterpillar fastens the case with the long side. The doll is cream colored and has violet eyes that are ashen after two days. The moths emerge after four to seven days. In the tropical areas of the circulation area moth can be found throughout the year. In Europe they are found in the summer months.
As parasitoid a nematode from the nematode family Mermithidae is called, who lives in the caterpillar body until it is completely empty eaten. Infected caterpillars do not come to pupate.
System
From the literature, the following synonyms are known:
- Nymphula stagnalis Zeller, 1852
- Hydrocampa depunctalis Guenée, 1854
- Zebronia decussalis Walker, 1859
- Cataclysta vestigialis Snellen, 1880
- Hydrocampa hilli Tepper, 1890