Rhagades amasina
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| ( Herrich-Schäffer , 1851) |
Rhagades amasina is a butterfly fromthe ram family (Zygaenidae).
features
The moths reach a forewing length of 9.0 to 10.5 millimeters in the males and 8.5 to 9.5 millimeters in the females. The head, thorax and abdomen are brownish black and occasionally covered with shiny scales . The sensors have 39 to 42 segments. The forewing tops are brownish black and shimmer olive green. The hind wings are gray-black and slightly translucent proximally . The females are slightly lighter in color than the males. In the males, the valves have a distinctive double toothing distally . The Aedeagus has a long, almost straight cornutus, a short curved and a very short tooth-like cornutus. In females, the ostium is slightly offset to the side and slit-shaped between the fused sternites 7 and 8. The prebursa is provided with distinctive spines. The 7th sternite has a very strongly sclerotized edge distally and is completely fused with the likewise well-developed and strongly sclerotized 8th sternite. The 8th sternite is rectangular and has small but well developed apophyseal appendages.
A similar species is Rhagades predotae , which shimmers purple-violet and is only found on the Iberian Peninsula . The dark green ram ( Rhagades pruni ) is more bluish green in color, less densely scaled and does not occur in Turkey or the Middle East. Both types can be distinguished genitally morphologically.
The egg is whitish yellow and always covered with some of the females' dew scales, giving the impression of dark speckles. It is slightly flattened at one end and only weakly indicated cap formation at the round end. The egg surface is reminiscent of hammered metal and is slightly grooved lengthways.
In the first three stages, the caterpillar is gray-white and almost without drawings. In the fourth stage (L 4 ) it is pale dark gray and has short bristles. After overwintering, it is black and has dark tufts of hair. In the L 7 stage, the appearance changes again: the caterpillar is now velvety black, the underside vermilion . The head is glossy black, the buttons are dark brown. The bristle warts are also black. The bristles are colored differently: the black stripe on the back is followed by a white area on both sides, followed by a red-brown line. The sides are white, the ventral side is vermilion.
The pupa is blackish brown and cannot be distinguished from a Rhagades pruni pupa.
distribution
Rhagades amasina occurs in Greece on the islands of Kos and Rhodes , the species is also widespread in Turkey , northern Syria and Lebanon . Lime- rich biotopes are settled with bushy Prunus and Crataegus vegetation.
biology
The females lay the eggs in flat ice mirrors of 10 to 40 pieces on the leaves. The forage plants include Rosaceae , Prunus and Crataegus species. The caterpillars hatch after ten to twelve days under breeding conditions at room temperature. They feed on the leaves by what is known as scraping, which leaves the central lamella of the leaf. From the third stage, the caterpillars also eat holes in the leaves (lattice corrosion). In the fourth stage (L 4 ) the caterpillar does not eat any food, creates a loose, white web ( hibernarium ) and hibernates in it with the head drawn in and the thoracic legs drawn in tightly. The caterpillars shed their skin in a white web. The adult caterpillars pupate in a white, egg-shaped cocoon , which is usually spun in the middle of the leaf. The leaf edges are rolled over the cocoon. Under breeding conditions, the moths hatched after 20 days at room temperature .
swell
Individual evidence
- ↑ a b c d e Gerhard Tarmann: On the biology and breeding of Rhagades (Rhagades) amasina (Herrich-Schäffer, 1852) (Lepidoptera: Zygaenidae). Entomofauna Volume 4, Issue 11 (1983), p. 157 PDF
- ^ Gerhard Tarmann: Contribution to the knowledge of the zygaenid fauna of the island of Rhodes (Lepidoptera). Journal of the Working Group of Austrian Entomologists 35 (1983), p. 10 PDF
- ↑ a b c C. M. Naumann, WG Tremewan: The Western Palaearctic Zygaenidae . 1st edition. Apollo Books, Stenstrup 1999, ISBN 87-88757-15-3 , pp. 109 (English).
literature
- CM Naumann, WG Tremewan: The Western Palaearctic Zygaenidae . 1st edition. Apollo Books, Stenstrup 1999, ISBN 87-88757-15-3 (English).
Web links
- Rhagades amasina at Fauna Europaea. Retrieved March 21, 2011