Buccinum

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Buccinum
Whelk (Buccinum undatum)

Whelk ( Buccinum undatum )

Systematics
Order : Sorbeoconcha
Subordination : Hypsogastropoda
Partial order : New snails (Neogastropoda)
Superfamily : Buccinoidea
Family : Horn snails (Buccinidae)
Genre : Buccinum
Scientific name
Buccinum
Linnaeus , 1758

Buccinum is the name of a species-richgenus of snail from the family of horned snails (Buccinidae), whose medium-sized to large species can be found circumboreally in the Atlantic and Pacific . Probably the most common type is the throughout the North Atlantic occurring whelk ( Buccinum undatum ), but this is like other species of the genus threatened in many areas by water pollution.

features

The right-hand winding cases of the Buccinum species are more or less conical. They have a high thread and usually a bulbous body. The surface can be smooth or folded and spirally striped, in some species with edges and knots. The apex has usually grown into the younger whorls. The quite large case mouth is egg-shaped, cut wide at the bottom, with a simple outer edge and without varix. The spindle is cut out irregularly and often forms two distinct angles. The mostly large operculum is circular to oval and has entire margins with a nucleus located in the center or on the outer edge.

The snails, like most front gill snails, are of separate sexes. The male mates with the female with his long penis . The female lays egg capsules in which, in addition to a few viable eggs, there are many sewage eggs. As far as is known, a direct development takes place in all Buccinum species, during which the embryos in the egg capsule consume the eggs and hatch as finished snails a few weeks after egg-laying. Ontogeny has been investigated in Buccinum undatum , B. bayani and B. isaotakii , among others .

Like other horn snails, the Buccinum species feed primarily on polychaetes , mollusks and carrion .

History of the system

Linnaeus describes the genus Buccinum in 1758 as a snail with a one-piece spiral, rounded shell with an egg-shaped opening that ends in a small channel on the right (in the "blunt" form retusa in a lacuna), with a blunt tip and a flat inner lip. Due to these morphological features of the snail shell , he includes numerous other species in this genus in addition to the whelk, such as the barrel snail ( Buccinum galea , B. dolium , B. perdix ), harp snail ( Buccinum harpa ), the net slug ( Buccinum reticulatus ) or the Northern purple snail ( Buccinum lapillus ), which belongs to the spiny snail , but is prickless .

As a type species which is common whelk ( Buccinum undatum ) were fixed. The scope of the genre was narrowed down more and more over time. The heterogeneity of the genre and the need for a revision is described, for example, by Heinrich Carl Küster in 1858, without being able to fully manage it. Wilhelm Kobelt , on the other hand, already restricted the genus in 1883 to the horned snails , which are still included today , by excluding the species that are not directly related and placing them in other genera.

literature

  • Frank Riedel: Origin and evolution of the "higher" Caenogastropoda . Berliner Geoscientific Abhandlungen, Series E, Volume 32, Berlin 2000, 240 pages, ISBN 3-89582-077-6 .

Individual evidence

  1. ↑ Ten Hallers-Tjabbes, CC, Everaarts, JM, Mensink, BP, & Boon, JP (1996) The Decline of the North Sea Whelk (Buccinum undatum L.) Between 1970 and 1990: A Natural or Human-Induced Event? 17: 1-3. pp. 333-43. Marine Ecology.
  2. ↑ Syafruddin Nasution (2003): Intra-Capsular Development in Marine Gastropod Buccinum undatum (Linnaeous 1758)  ( page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. (PDF; 49 kB) [sic!]. Jurnal Natur Indonesia 5 (2): 124-128 (2003)@1@ 2Template: Dead Link / www.unri.ac.id  
  3. ↑ Kathryn E. Smith, Sven Thatje (2012): Nurse egg consumption and intracapsular development in the common whelk Buccinum undatum (Linnaeus 1758) . Helgoland Marine Research, 2012, doi : 10.1007 / s10152-012-0308-1 .
  4. ↑ Youichi Seto, Shozaburo Doi (1997): Seed production trial of the deep-sea whelk Buccinum bayani using deep sea water ( Memento of the original from May 28, 2010 in the Internet Archive ) Info: The @1@ 2Template: Webachiv / IABot / www.lib.noaa.gov 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. (PDF; 74 kB) . UJNR Technical Report No. 28, pp. 85-88.
  5. Jump up ↑ Anthony S. Ilano, Katsuaki Fujinaga, Shigeru Nakao (2004): Mating, development and effects of female size on offspring number and size in the neogastropod Buccinum isaotakii (Kira, 1959) . Journal of Molluscan Studies 70 (3), pp. 277-282.
  6. ↑ Carolus Linnaeus : Systema Naturae. 10th ed., Lars Salvius: Stockholm 1758, p. 734: No. 288. Buccinum. Testa univalvis, spiralis, gibbosa. Apertura ovata desinens in canaliculum (f. Retusam Lacunam) dextrum, apice retusum. Labium interius explanatum.
  7. ↑ Carolus Linnaeus : Systema Naturae. 10th ed., Lars Salvius: Stockholm 1758, p. 740, 410. Buccinum undatum. B. testa oblonga rudi transversum striata: anfractibus curvato-multiangulis. Habitat in O. Europaeo. (Buccinum with an elongated, artless, transversely striped shell. Lives in the European ocean.)
  8. ^ Heinrich Carl Küster: The genera Buccinum, Purpura, Concholepas and Monoceros . Systematic Conchylia Cabinet. Nuremberg 1858.
  9. ^ Wilhelm Kobelt: The genus Buccinum . Systematic Conchylia Cabinet. Nuremberg 1883.

Web links

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