Cochlostoma hidalgoi
| Cochlostoma hidalgoi | ||||||||||||
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Cochlostoma hidalgoi |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Cochlostoma hidalgoi | ||||||||||||
| ( Crosse , 1864) |
Cochlostoma hidalgoi is a species of snail from the family of the forest cap snail (Cochlostomatidae) in the order Architaenioglossa ("old bandworm")living on land.
features
casing
The right-hand winding case is 8 to 15 mm high and 4.2 to 6.8 mm wide. It has 7.5 to 8.5 (according to Welter-Schultes 7 to 9) well rounded turns, which are separated from each other by a flat seam. The first turns have a slight edge on the periphery, but this is hidden by the seam or is very close to the seam. The last turn is slightly constricted, usually with a slight edge in the extension of the seam. The sculpture on the first half, embryonically formed turn consists of weak wrinkles that gradually merge into tightly standing fine ribs on the second turn. Here, there can be 25 to 30 ribs per millimeter. After that, the number of ribs decreases; On the third to fifth turn, the ribs are of different strength, and there are 6 to 11 ribs per millimeter. On the last turns, the number of ribs continues to decrease and from the penultimate turn there are only 3 to 4 ribs per millimeter. The ribs are slightly crooked, slightly curved and have a slight thickening near the seam. The housings are colored reddish brown, becoming lighter towards the apex . Juvenile specimens usually have somewhat lighter cases, occasionally with indistinct spiral bands. The housings, however, show a certain variability in the number of ribs and the shape of the ribs, as well as in the degree of curvature of the windings and also in color.
The mouth is slightly crooked and has a wide, collar-shaped white border. The inner lip is thickened. The mouth edge is slightly drawn out towards the spindle ear-shaped, and then narrows at the spindle edge.
Genital tract
In the genital tract of the females, the sex glands are located in the upper turns of the housing. The ovaries are connected to the uterus / vagina complex by a thin fallopian tube. Shortly before entering the uterus or seminal vesicle, the fallopian tube is slightly swollen and forms a tight tangle. After that it divides into two conductors, one enters the uterus, the other enters the seminal vesicle. The seminal vesicle is very close to the proximal part of the uterus. The conductor that leads to the seminal vesicle enters more distally near the uterus.
The light orange sex glands in the male's genital tract are also located in the upper turns of the housing. The thin vas deferens runs along the spindle and enters the elongated, flattened and rounded at the top prostate, which sits at the rear end of the mantle cavity. The gradually thinning prostate opens into a closed pit on the right side of the animal behind the eye, from where a closed conductor runs to the base of the penis. The penis is comparatively large with an internal conductor that leads to the tip. In cochlostoma hidalgoi , the penis is cylindrical in the lower half and flattens out on one side in the upper half. It remains about the same width and gradually tapers to the tip.
Geographical distribution and habitat
The distribution area extends in Spain from the Cantabrian Mountains ( Asturias ) in the west to the western edge of the Western Pyrenees ( Sierra de Aralar , Sierra de Urbasa ) in the east. In France, further east, there is a small, isolated deposit at the Col de la Pierre Saint-Martin ( Département Pyrénées-Atlantiques ).
The animals live on smooth, shady or unshaded surfaces of limestone rocks. They keep a summer dormancy on little overhanging areas that are protected, but where rainwater still comes.
Taxonomy
The taxon was introduced into scientific literature in 1864 by Hippolyte Crosse as Pomatias hidalgoi . Wilhelm Kobelt transferred the species to the genus or sub-genus Cochlostoma (Obscurella) Clessin, 1889. The fauna Europaea lists the species as Cochlostoma (Obscurella) hidalgoi (Crosse, 1864).
A more recent synonym is Pomatias hispanicus Bourguignat in Saint-Simon, 1869.
supporting documents
literature
- Serge Gofas: The systematics of Pyrenean and Cantabrian Cochlostoma (Gastropoda, Cyclophoroidea) revisited. In: Journal of Natural History. 35 (9) 2001, pp. 1277-1369 doi : 10.1080 / 002229301750384301
- Anton Josef Wagner (Antoni Jozef Wagner): Monograph of the genus Pomatias Studer. In: Memoranda of the Imperial Academy of Sciences, mathematical-scientific class. 64, Vienna 1897, pp. 565–632, plates 1–10. (P. 589 online at www.biodiversitylibrary.org)
- Francisco W. Welter-Schultes: European non-marine molluscs, a guide for species identification. (= Identification book for European land and freshwater mollusks). Planet Poster Ed., Göttingen 2012, ISBN 978-3-933922-75-5 .
Individual evidence
- ^ Hippolyte Crosse: Catalog des espèces appartenant au genre Pomatias, et description d'une espèce nouvelle. In: Journal de Conchyliologie. 12, Paris 1864, pp. 23-33. (online at www.biodiversitylibrary.org) .
- ^ Wilhelm Kobelt: The animal kingdom. A compilation and identification of the recent animal forms. 16. Delivery. Mollusca. Cyclophoridae. Friedländer, Berlin 1902, p. 500. (online at www.biodiversitylibrary.org)
- ↑ Fauna Europaea - Cochlostoma (Obscurella) hidalgoi (Crosse 1864)
- ^ Alfred de Saint-Simon: Descriptions d'espèces nouvelles du genre Pomatias, suivies d'un aperçu synonymique sur les espèces de ce genre. In: Revue et Magasin de Zoologie pure et appliquée et de Sériciculture Comparée. 2. série, 21, Paris 1869, pp. 3–22. (online at www.biodiversitylibrary.org)
On-line
Web links
- Molluscs of Central Europe
- Obscurella hidalgoi inthe IUCN 2013 Red List of Endangered Species . Posted by: Feher, Z., 2011. Retrieved February 13, 2014.