White-footed narrow-necked runner
| White-footed narrow-necked runner | ||||||||||||
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White-footed narrow-necked beetle ( Paranchus albipes ) |
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| Scientific name | ||||||||||||
| Paranchus albipes | ||||||||||||
| ( Fabricius , 1796) |
| Pictures of the beetle | |
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| Fig. 1: Head from the front | Fig. 2: Head from the side |
 
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| Fig. 3: Top view and side view | Fig. 4: underside |
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Fig. 5: Head from below, partially colored on the right; red: probe; blue: jaw button; green: lip switch; pink: pair of bristles on the penultimate link of the lip probe |
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Fig. 6: Mid-breast from obliquely below, partially colored on the right; ocher: folded part of the elytra; orange: delimitation of the middle hip cavity Middle leg: yellow: hip; pink: trochanter; blue: thigh; green: epimer of the mid-breast |
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The Weißfüßige Enghalsläufer or Shore Enghalsläufer ( Paranchus albipes ) is a beetle from the family of ground beetles (Carabidae). The black-brown beetle with yellowish feet is not uncommon, but is hardly noticed due to its way of life and its size of only seven to nine millimeters.
As synonymous with the generic name Paranchus applies Platynus , synonyms for species names albipes are flavipes and ruficornis . In the standard work Freude-Harde-Lohse the beetle is listed under Platynus ruficornis (Goeze, 1777).
The species is classified as not endangered in the Red List of Endangered Species in Germany and in the states of Baden-Württemberg and Saxony-Anhalt .
Notes on the name
The species was first described by Fabricius in 1796 under the name Carabus albipes . The description contains the characterization antennis pedibusque pallidis ( Latin with pale antennae and feet). This explains the species name albipes (from Latin álbus white and pēs, pédis foot, with white feet ) and the addition of " white feet " to the German name.
The generic name Paranchus is made up of the name Anchus and old Gr. παρά pará "next to, in place of" together. It shows the close relationship to the anchus . Anchus is still listed as a subgenus of Platynus by Reitter and includes some of the species with a constricted pronotum (old Greek άγχω áncho, I tie together). This also explains the German name "Narrow Neck Beetle".
The genus Paranchus was only established in 1974. It contains only three species, all of which are found in Europe.
features
As a typical ground beetle, the animal reveals six abdomen segments when viewed from below. The rear hips protrude beyond the rear edge of the first segment so that it is only visible to the side of the rear hips (Fig. 4). The typical legs are pale yellow and all end with five-limbed tarsi . The long end link of the tarsi has a pair of claws that are imperforate. In the narrow-necked runners, the tarsal links each have a pair of bristles below. This also applies to the claw member of the hind tarsi (visible in Fig. 4 at high resolution on the upper foot). The first three tarsi members of the front legs of the males are slightly enlarged. They are equipped with adhesive hair on the underside to facilitate the copulation position. The front rails have a recess that can be covered by a movable mandrel and is delimited with small bristles. This plaster notch (visible from below in Fig. 4) is used to clean the sensors. The rail in front of the plaster notch is not widened significantly.
The head is longer than it is wide and narrower than the pronotum . The compound eyes are only moderately bulged. As with all species of the subfamily, there is a pore point at the front and back of the eye , from which a long bristle arises (supraorbital bristles, clearly visible in Fig. 2). The bright yellow antennae are eleven-limbed and thread-shaped. Their base links are also not canted. For the systematic classification it is important that the antennae are already finely hairy from the fourth segment onwards, this is only bald at the base (in Fig. 6, left, it is easy to see). Seen from below, the mouthparts are not covered by a chin plate (Fig. 5). The mandibles are curved inward and pointed. Lip and jaw probes each end in a spindle-shaped link. The penultimate link of the lip button has two bristles on the inside (shown in pink on the right in Fig. 5).
The pronotum is heart-shaped and narrow. In front it is about as wide as the head, in the front third it reaches the greatest width, after which it tapers sharply. It is significantly narrower than the two wing-covers together, but wider than a single wing-cover. It is clearly edged, the rear corners are pointed. The pronotum base is strongly punctured .
The elytra widen only slightly after the shoulders and reach the greatest width in the rear third. They end together rounded. The edge and the tip are lightened. The elytra are divided into strips by parallel furrows. The furrow next to the sash of the wing cover is not deepened at the back, bent over and tapering forward. In contrast to the similar Paranchus obscurus, the furrows in Paranchus albipes are not dotted.
Way of life
The beetle lives on loamy to sandy banks of standing or flowing water. It occurs in both eutrophic and oligotrophic waters. He hibernates as an imago .
Occurrence
You can find the species from southern Scandinavia to southern Spain and Italy, also in North Africa, Asia Minor and North America ( Holarctic ).
swell
literature
- Heinz Joy, Karl Wilhelm Harde, Gustav Adolf Lohse: The beetles of Central Europe . tape 2 . Adephaga 1. Elsevier, Spektrum, Akad. Verl., Munich 1976, ISBN 3-87263-025-3 .
- Ekkehard Wachmann , Ralph Platen, Dieter Barndt: Ground beetles - observation, way of life . 1st edition. Naturbuch-Verlag, Augsburg 1995, ISBN 3-89440-125-7 .
Individual evidence
- ↑ a b c Fauna Europaea: systematics and distribution (English)
- ↑ Red lists at BioNetworkX
- ↑ Ioh.Christ.Fabricius: Entomologia systematica emendata et aucta. Secundum classes, ordines, genera, species adjectis synonimis, locis, observationibus, descriptionibus Tom I den Haag 1792 p. 140, no. 72
- ↑ Sigmund Schenkling: Explanation of the scientific beetle names (species)
- ↑ Sigmund Schenkling: Explanation of the scientific beetle names (genus)
- ^ Paranchus at Fauna Europaea. Retrieved March 20, 2013
- ↑ Species of the genus Elaphrus at BioLib
