Crioceris macilenta
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Crioceris macilenta |
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| Way , 1880 |
Crioceris macilenta is a beetle from the family of leaf beetles (Chrysomelidae) and the subfamily of Criocerinae . The genus Crioceris is represented in Europe with seven species , the strongly varying species Crioceris macilenta occurs in the Mediterranean area.
Notes on the name
Crioceris macilenta was first described in 1880 by Weise , who classified the species behind the common asparagus chicken Crioceris asparagi . The German-language description begins with the words smaller and even flatter than the previous type . This explains the species name maciléntus ( lat. Lean). The genus name Crioceris is from Altgr. κριός kriós for "ram" and κέρας kéras for "horn" derived. It refers to the beetle's antennae.
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| Side view | pair |
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| Variants of the wing drawing after Chobaut | |
Characteristics of the beetle
Since the specimens of the species, as in the case of the common asparagus, vary greatly, some authors regard Crioceris macilenta as the southern form of the asparagus. With a length of 4.5 to five millimeters, the beetles are smaller than the asparagus chickens, and also flatter. The basic color is earthy black.
The head is wrinkled tightly in front and around the eyes . The forehead and neck are dense and strongly punctured . The temples are moderately arched. The eleven-link antennae are string-shaped and predominantly black. According to the first description, the first antenna element is lighter green, the following three elements darker green, the remaining elements black. The first links can, however, be darker to black, but they are shiny, while the remaining links appear dull due to the hair.
The pronotum is hardly longer than it is wide, its sides almost parallel. It is barely noticeably constricted in front of the base and has a double border at the base. It is dense and clearly dotted. The disc is slightly curved. The pronotum is black, but lined with broad brown all around.
The label is about as long as it is wide and rounded at the back.
The elytra are together significantly wider than the pronotum and head. The sides run approximately parallel, their ends together form approximately a semicircle. The wing covers have longitudinal rows of points. The points are much closer and the rows are sunk deeper and run more regularly than with the asparagus chicken. The basic color of the wing covers is black-brown. The wing covers are edged brown on the outside to the tip. On each wing-cover there are three white longitudinal flaws, one behind the other, which are usually fused to form a wide strip that extends between the third and sixth row of dots, starting at the front and over about three-quarters of the length of the wing-cover. This stripe can be dissolved, but the parts never expand to the seam or to the outer edge of the wing covers. Several authors have described numerous variants of the white drawing, the most important of which are shown in Fig. 4.
The legs are light brown at least at the roots of the thighs and splints, the thighs on the outside ore green to black, the four-limbed tarsi and the outer part of the splint are darkened. The thighs of the hind legs are hardly narrower than in the related species, but the leg is shorter. The claws are not grown together.
biology
The beetle has a stridulation apparatus . The shrill ridges sit on the seventh visible tergite and the wing covers form the shrill surface. The meaning of the sound generation is still unclear, it is assumed that it serves as a deterrent.
The beetles are found on Asparagus aphyllus orientalis and other asparagus species ( Asparagus tenuifolius , Asparagus officinalis , Asparagus setaceus ). In the Balearic Islands they appear from May to June and train two generations a year. The larvae crawl like caterpillars on the host plants and feed on them. The excrement is attached to the abdomen.
distribution
The species is common in the Mediterranean. The Fauna Europaea includes the Balearic Islands, Corsica , France , Gibraltar , Italy , Malta , Monaco , Portugal , Sardinia , Sicily , Spain and North Africa . However, the beetle is more common, it has also been reported from Crete, and the photos accompanying the article are from the Peloponnese .
Individual evidence
- ↑ a b Systematics and distribution of the species Crioceris macilenta in Fauna Europaea, accessed on December 27, 2016
- ^ Systematics of the genus Crioceris in Fauna Europaea, accessed on December 27, 2016
- ↑ Sigmund Schenkling: Explanation of the scientific beetle names (species)
- ↑ Sigmund Schenkling: Explanation of the scientific beetle names (genus)
- ↑ A. Chobaut "Les sous-variétés de Crioceris macilenta " in Bulletin de la Société entomologique de France 1907 pp 177
- ↑ A. Chobaut: "Les sous-variétés de Crioceris macilenta (deuxième note)" in Bulletin de la Société entomologique de France 1907 p. 234
- ↑ L. Von Heyden: The varieties of Crioceris asperagi L. and macilenta way (Coleopt.) In Wiener Entomologische Zeitung XXV. Year, Vienna 1906 p. 125
- ↑ Wilhelm Schuster: " Crioceris macilenta Var.…. In the Mainzer Becken" in the yearbooks of the Nassau Association for Natural History 59th year 1906 p. 147
- ↑ Michael Schmitt: Morphological and bioacoustic aspects of stridulation in_Criocerinae (Coleoptera, Chrysomelidae) in Zool. Number 225 (1990) 5/6 pp. 225-240 PDF
- ↑ a b Michael Schmitt: The Criocerinae Biology Phylogeny and Evolution in p. 476
- ↑ Renato Regalin: Nota sui Crisomelidi di Creta (Grecia) ... in Boll. Soc. Entom. Ital. 129 (1) 76–77 p. 68 ( Memento of the original dated January 2, 2017 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
