Chilacis typhae
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Chilacis typhae |
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| Scientific name | ||||||||||||
| Chilacis typhae | ||||||||||||
| ( Perris , 1857) |
Chilacis typhae is a bug fromthe Artheneidae family . The specific epithet typhae is derived from the specialization of the species on cattails ( Typha ).
features
The bugs are 3.0 to 4.8 millimeters long and have a hairless, shiny yellowish-brown or ocher-colored body with a strongly punctiform structure on the top. Your head and thorax are darkly colored on the underside. Characteristic of the species are the juga on the head , which almost reach the tip of the tylus , the latter reaching beyond the tip of the first antennae. Conspicuous dark colored pits separate the tylus from the juga. The almost trapezoidal pronotum has protruding, flattened sides. The label ( scutellum ) bears a pale colored "V". The nymphs are pale yellowish-brown with a slightly orange or reddish pattern, or sometimes reddish transverse bands on the abdomen. Between the third to the sixth tergite on the abdomen, they each have dorsal scent gland openings. The foremost opening has receded. The nymphs are similar to those of the birch bug ( Kleidocerys resedae ), but differ from C. typhae by their brown or almost black head and pronotum, as well as their dark red or red-brown abdomen. In addition, the first scent gland openings are well developed in the similar species.
Occurrence and habitat
The species is widespread from the south of Scandinavia to the north of the Mediterranean area and occurs in the west from the British Isles, east to Central Asia. It was also introduced to North America. The species is widespread in Central Europe and mostly not rare. Chilacis Typhae can be found wherever cattail ( Typha ) grow.
Way of life
Chilacis typhae lives on cattails , where they spend most of their time and especially their development inside the cobs, where they suckle on seeds of the plants of varying degrees. Both fresh and old flasks are inhabited. Only the adults can be observed on the outside of the fruit stands during the mating and spreading season. The flasks are sometimes inhabited with a large number of individuals, about 1000 animals have been observed in a single flask. Pistons populated with the bugs disintegrate earlier than others. You can find both nymphs and adults all year round in different numbers and development, and mating and oviposition also take place at different times. This makes it difficult to determine the annual cycle and the number of generations occurring per year. Presumably, the species produces two generations per year in Central Europe, whereby the second remains incomplete in unfavorable years and thus overwintering nymphs also appear. Overwintering takes place either in the cobs or in dry litter . The females lay their eggs on both the seeds and the pappus of the bulrush.
supporting documents
Individual evidence
- ↑ a b c A. G. Wheeler & JE Fetter: Chilacis typhae (Heteroptera: Lygaeidae) and the subfamily Artheneinae new to North America. Proceedings of the Entomological Society of Washington 89, pp. 244-249 (1987) (online: [1] ).
- ↑ a b Ekkehard Wachmann , Albert Melber, Jürgen Deckert: Bugs. Volume 3: Pentatomomorpha I: Aradoidea (bark bugs), Lygaeoidea (ground bugs, etc.), Pyrrhocoroidea (fire bugs) and Coreoidea (edge bugs, etc.). (= The animal world of Germany and the adjacent parts of the sea according to their characteristics and their way of life . 78th part). Goecke & Evers, Keltern 2007, ISBN 978-3-937783-29-1 , p. 83 f .
literature
- Ekkehard Wachmann , Albert Melber, Jürgen Deckert: Bugs. Volume 3: Pentatomomorpha I: Aradoidea (bark bugs), Lygaeoidea (ground bugs, etc.), Pyrrhocoroidea (fire bugs) and Coreoidea (edge bugs, etc.). (= The animal world of Germany and the adjacent parts of the sea according to their characteristics and their way of life . 78th part). Goecke & Evers, Keltern 2007, ISBN 978-3-937783-29-1 .