Cattaro hollow house

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Cattaro hollow house
Cattaro hollow house. Housing with cover

Cattaro hollow house. Housing with cover

Systematics
Class : Snails (gastropoda)
Order : Cycloneritimorpha
Superfamily : Hydrocenoidea
Family : Hydrocenidae
Genre : Hydrocena
Type : Cattaro hollow house
Scientific name
Hydrocena cattaroensis
( Pfeiffer , 1841)
Hydocena cattaroensis live. Housing with camouflage. Low resolution due to VGA video.
Hydrocena cattaroensis. Above: creeping. Below: head with eyes on hemispherical elevations. Low resolution due to VGA video.

The Cattaro hollow house ( Hydrocena cattaroensis (Pfeiffer, 1841)) is a land-based snail - a species of the Hydrocenidae family , which belongs to the order Cycloneritimorpha . It is endemic to the region around Kotor ( Montenegro ).

features

The broad, conical, very small case with a diameter of 2 to 3 mm and a height of 2 to 2.5 mm has three to four convex, slowly increasing turns. The mouth is ovoid when viewed from above. The essentially smooth surface shows deposits of feces and dirty gray-green material (detritus) from the immediate vicinity. The comparatively thin shell wall itself is amber in color. In living animals, the shell under the detritus layer appears dark brown due to the black pigmentation of the coat. The rest of the body is almost white with a trace of yellow. The soft body is relatively short, the head is separated from the slightly wider foot. The head has a short snout and two short triangular antennae, at the base of which sit the large black eyes. The creeper is separated from the rest of the body by a circumferential longitudinal furrow. At the back it has a chalky cover ( operculum ), which has a long extension formed on the lower part of the inside. The nucleus of the lid is at the lower edge on the left. The housing can be closed with the cover. The inner walls of the housing are dissolved (resorbed), hence the name Hohlhäuschen. The viscera bends without further turns with a front left and a rear right branch up to the tip of the housing. The animals have no gills, but rather breathe through the mantle cavity.

Geographical distribution

The Cattaro hollow house occurs in Montenegro in Kotor ( Cattaro ) and its surroundings, as at the source of the Ljuta near Donji Orahovac and near Podgorica (formerly Titograd ). Franz Hermann Troschel stated in 1857 that he had also examined a specimen from the island of Lesina (= Hvar , Croatia ). The find has not yet been confirmed.

Habitat and way of life

The Cattaro hollow houses live on rocks and walls that are surrounded by moist air near the sea and in gorges. It occurs in Montenegro in the vicinity of Kotor from sea level to 800 m above sea level. It is well camouflaged by the droppings and detritus from the surroundings that are deposited on the housing , and well adapted to the appearance of the surrounding rock. The animals spend most of their time in a resting state, with the housing closed with the operculum. Only when they are moistened by water, for example when it rains, do they open the housing cover, stretch out and search the immediate area for food. They feed on algae and lichens encrusted on the rock surface, which are scraped off with the rasp tongue (radula).

Taxonomy

Around 1840, small snails were sent to the dealer of natural history objects, Mr. Louis Parreyss, from the town of Cattaro , which at that time belonged to Dalmatia , today Kotor in Montenegro. He named her in letters Paludina Sirkii Parr. (Parr. = Parreyss), but without publishing this name. The doctor, botanist and mollusc researcher (malacologist) Ludwig Georg Karl Pfeiffer described these snails in 1841 as Cyclostoma cattaroense . Parreyss then sent the animals under the name Hydrocaena Sirkii Parr. The generic name Hydrocaena was also not formally published by Parreyss and is therefore a nomen nudum . Already at this point in time Parreyss clearly recognized that the species cannot be placed in the genus Paludina Férussac, 1812 or in the genus Cyclostoma Lamarck, 1799, due to its characteristics . Herrmannsen (1846) lists the genus Hydrocena with Parreyss as the author.

Heinrich Carl Küster published finds from Paludina (Hydrocena) Sirkii Parr in 1844 . ; Hydrocena as the name of the genus group and also the species name sirkii were thus validly published by him for the first time. Ludwig Pfeiffer also took over the generic name Hydrocena in 1847 , but corrected the species name to Hydrocena cattaroensis , as this name is older. Hydrocena sirkii is formally the type species of Hydrocena by monotype , but Hydrocena cattaroensis is de facto the type species, since Hydrocena sirkii is a more recent synonym of Hydrocena cattaroensis .

literature

  • Ludwig Pfeiffer: Contributions to the mollusc fauna of Germany, especially the Austrian states. in: Archive for Natural History, Volume 7, No. 1, 1841, pp. 215–230 www.biodiversitylibrary.org .
  • Johannes Thiele: About the anatomy of Hydrocena cattaroensis Pf. Treatises of the Senckenbergische Naturforschenden Gesellschaft, Volume 32, 1910, pp. 354-358.

Individual evidence

  1. ^ A b Rosina Fechter, Gerhard Falkner: Mollusks. The colored nature guides. Mosaik Verlag, 1989 (p. 114).
  2. ↑ Johannes Thiele: About the anatomy of Hydrocena cattaroensis Pf. Treatises of the Senckenbergische Naturforschenden Gesellschaft 32, 1910, pp. 354-358.
  3. ↑ University of Göttingen: Animal Base at animalbase.uni-goettingen.de
  4. ↑ Franz Hermann Troschel (1856–1863): The teeth of snails to justify a natural classification. Volume 1., Nicolaische Verlagsbuchhandlung, Berlin 1857 Online at www.biodiversitylibrary.org (p. 83).
  5. ^ Edmund Gittenberger: Hydrocena cattaroensis and its ecology. In: Basteria , Volume 44, Issue 1-4, 1980, pp. 9-10 ISSN  0005-6219
  6. ↑ Ludwig Pfeiffer . Monographia Pneumonopomorum viventium IV Casselis, London, Paris, 1876. www.biodiversitylibrary.org (p 215).
  7. ^ A b Heinrich Carl Küster: Zoologische Notitzen. Toughness of the internal mollusks. In: Isis von Oken , year 1844, issue 9, 1844, pp. 645–656, Leipzig Online at www.biodiversitylibrary.org (p. 646).
  8. ^ Ludwig Pfeiffer: Contributions to the mollusc fauna of Germany, especially the Austrian states. In: Archives for Natural History. 7, 1841, pp. 215-230, Berlin Online at www.biodiversitylibrary.org (p. 225).
  9. ^ Heinrich Carl Küster: Systematic Conchylia Cabinet by Martini and Chemnitz. In connection with Pfeiffer, Philippi, Dunkler, Roemer, Weinkauff, Clessin, Brot, Loebbke and von Martens, newly published and completed by HC Küster. Continued by W. Kobelt after his death. Parts 1–148, with panels. Nuremberg 1852. Hydrocaena in volume 1, 21st section, online at www.biodiversitylibrary.org (p. 80).
  10. ↑ Herrmannsen, August Nicolaus: Indicis generum malacozoorum primordia: nomina subgenerum, generum, familiarum, tribuum, ordinum, classium; adjectis autoribus, temporibus, locis systematicis atque literariis, etymis, synonymis. Volume 1, Kassel, Theodor Fischer, 1846. Online at www.biodiversitylibrary.com (p. 546)
  11. ^ Hydrocena at Fauna Europaea
  12. ↑ Ludwig Pfeiffer: Overview of all known types of Cyclostomaceae. In: Zeitschrift für Malakozoologie , Volume 4, 1847, pp. 101–112, Kassel Online at www.biodiversitylibrary.org (p. 112).

Web links

Commons : Hydrocena  - collection of images, videos and audio files