Lepas anserifera
| Lepas anserifera | ||||||||||||
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Lepas anserifera |
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| Scientific name | ||||||||||||
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| Linnaeus , 1767 |
Lepas Anserifera is a species of barnacles in the class of barnacles , which can be found worldwide in oceans of floating debris.
features
The orange-colored pedunculus, the flexible, muscular stem of Lepas anserifera , is about 4 cm long, as is the shell-like capitulum ("little head"). The capitulum is enclosed by 6 thick, white, sculptured limestone slabs lying close together. The two largest limestone plates (scutum) at the end of the stem are rectangular with longitudinal furrows and a smooth hump. The two trapezoidal plates at the free end (tergum) are more furrowed. The dorsally located carina is broad and forked. The yellow flaps of the tergum give the edges of the plates of the living animal a coloration. As with other barnacles, the abdomen is stunted, so that the head and thorax make up the body. The mouthparts on the head consist of a finely toothed labrum, a blunt palpus, mandibles and maxillae . On the thorax there are 3 pairs of jaw feet and 5 to 6 pairs of cirrus to whirl up food - zooplankton and detritus - from the sea water. The tail extremities are smooth and curved, which makes Lepas anserifera clearly distinguishable from other barnacles.
Like other barnacles, Lepas anserifera is hermaphroditic . The development proceeds via a pelagic Nauplius larva and a Cypris larva, which attach themselves to a substrate and metamorphose into a sessile adult .
distribution
Lepas anserifera is a cosmopolitan in all temperate to tropical oceans of floating debris , but z. B. can also be found on whales .
literature
- William A. Newman: Cirripedia . In: Sol Felty Light and James T. Carlton: The Light and Smith Manual: Intertidal Invertebrates from Central California to Oregon (4th ed.). University of California Press, Berkeley 2007. pp. 475-484. ISBN 978-0-520-23939-5 .
Web links
- MJ de Kluijver and SS Ingalsuo: Macrobenthos of the North Sea - Crustacea. Lepas anserifera Linnaeus, 1767. Marine Species Identification Portal .
- Patricia B. Mitchell: Goose Barnacles: Undulating Creatures