Parapoynx stagnalis

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Parapoynx stagnalis
Parapoynx stagnalis (Zeller, 1852) Crambidae, Acentropinae (8240305369) .jpg

Parapoynx stagnalis

Systematics
Class : Insects (Insecta)
Order : Butterflies (Lepidoptera)
Family : Crambidae
Subfamily : Acentropinae
Genre : Parapoynx
Type : Parapoynx stagnalis
Scientific name
Parapoynx stagnalis
( Zeller , 1852)

Parapoynx stagnalis is a butterfly from the family of Crambiden ( Crambidae ).

features

The moths reach a wingspan of 12 millimeters for the males and 20 millimeters for the females. The forewings are white, there is no proximal line. The discocellular spot is divided into two black spots. The distal line is yellow and curved. The submargin line is indistinct and yellowish. The submarginal area is bordered white and indistinctly gray.

The genital armature of the males is quite small. Uncus and Gnathos are small. The gnathos is not toothed. The valves are parallel-walled and bent sharply upwards in the middle, there are no special features. The Juxta is oval. The phallus is slender and has no cornuti. The ejaculatory bulb opens in the middle.

In females, the oviscapter is slender and relatively short. It is provided with basally widened apophyses. The ductus bursae is relatively short and has a broad colliculum . The corpus bursae is oval and has a sign, which is located in a rectangular, heavily sclerotized area. It consists of two parallel, narrow, sclerotized ridges.

The adult caterpillar is pale green, slightly transparent and about 15 millimeters long. The green digestive tract is clearly visible through the semi-transparent skin. The head and the first thoracic segment are pale brown with brown spots. The caterpillar is equipped with six rows of filigree branched tracheal gills .

The egg is round and flat. It is colored yellow.

Similar species

A similar species is Parapoynx fluctuosalis .

distribution

Parapoynx stagnalis occurs in Africa including Madagascar . In the north the distribution area extends to Spain ( Gibraltar , province of Cádiz ). The species was introduced to England , where it was found in greenhouses for tropical aquatic plants. It is also widespread in the Oriental , Australis, and Neotropical .

biology

The females lay about 50 eggs, which are attached in rows, according to other sources also individually, to the underside of the leaves of the host plants. The ice stage is very short and lasts two to six days, on average about three days. The young caterpillars are pale cream-colored, only the head and the first thoracic segment are yellow. They have tubular tracheal gills. The caterpillars live in housings made from pieces of grass. The most important host plant is rice ( Oryza sativa ). Other host plants are Panicum hemitomum , Panicum distachyum , Panicum repens , Echinochloa colonum , chicken millet ( Echinochloa crus-galli ), Eragrostis interrupta and Paspalum scrobiculatum . The larval stage lasts 14 to 20 days. Before pupation, the caterpillar attaches the casing with the long side. The doll is cream in color and has purple eyes that turn ash gray after two days. The moths hatch after four to seven days. In the tropical areas of the distribution area, moths can be found throughout the year. In Europe you can find them in the summer months.

A nematode from the roundworm family Mermithidae , which lives in the caterpillar until it is completely empty, is named as a parasitoid . Infested caterpillars do not pupate.

Systematics

The following synonyms are known from the literature:

  • Nymphula stagnalis Zeller , 1852
  • Hydrocampa depunctalis Guenée , 1854
  • Zebronia decussalis Walker , 1859
  • Cataclysta vestigialis Snellen , 1880
  • Hydrocampa hilli Tepper , 1890

supporting documents

  1. ↑ a b c d e f g h i Barry Goater, Matthias Nuss, Wolfgang Speidel: Pyraloidea I (Crambidae, Acentropinae, Evergestinae, Heliothelinae, Schoenobiinae, Scopariinae) . In: P. Huemer, O. Karsholt, L. Lyneborg (eds.): Microlepidoptera of Europe . 1st edition. tape 4 . Apollo Books, Stenstrup 2005, ISBN 87-88757-33-1 , pp. 63 (English).
  2. ↑ a b c d e B. V. David, TN Ananthakrishnan (1978): Central and Applied Entomology. Tata McGraw-Hill Education, ISBN 0070434352 , p. 638
  3. ↑ Patrice Leraut: Zygaenids, Pyralids 1 . In: Moths of Europe . 1st edition. Volume III. NAP Editions, 2012, ISBN 978-2-913688-15-5 , pp. 130 (English).
  4. ↑ Global Information System on Pyraloidea (GlobIZ). Retrieved January 3, 2013 .
  5. ↑ Parapoynx stagnalis in Fauna Europaea. Retrieved January 3, 2013

Web links