فائل:Espirógrafo (Serpula vermicularis), Parque natural de la Arrábida, Portugal, 2020-07-31, DD 02.jpg

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خلاصہ

تفصیل
English: Ca. 5 centimetres (2.0 in) small Serpula vermicularis, Arrábida Natural Park, Portugal. Serpula vermicularis is not a flower, plant or a coral but a segmented marine polychaete worm. Yes, a worm in the family Serpulidae that lives in a tube into which it can retract. Serpula vermicularis is a filter feeder and extends its radioles to catch phytoplankton and detritus. If you approach to them they retract instantly. The tube where the worm lives is calcareous and is attached to a rock, boulder or other hard surface and has a length of 20 centimetres (7.9 in), but is usually shorter than this. The tube is built by the worm using calcium stored in two white sacs on the ventral side of the second segment, or peristomium. The tube is fabricated by the glandular ventral shields on the other thoracic segments, where calcium is mixed with an organic secretion to make a paste. This is formed into shape by a collar found just behind the first segment, the prostomium. The anterior part of the worm protrudes from the tube and has a plume of about 40 feather-like radioles projecting from the peristomium, which also houses the two eyes and the mouth. A funnel-shaped lid or operculum covers the entrance to the tube when the animal retracts inside.
Español: Espirógrafo (Serpula vermicularis), Parque natural de la Arrábida, Portugal
This is a photography of a protected area of Portugal indexed in the World Database on Protected Areas with the ID:
1340 (WDPA)
تریخ
سروت آپݨا کم
لکھاری
Diego Delso  (1974–)  wikidata:Q28147777
 
Diego Delso
ہور ناں
Poco a poco
گل بات Spanish free-license photographer تے وِکیمیڈیا ورتنوالا
جمن دیہاڑہ ۱۹ مئی ۱۹۷۴ Edit this at Wikidata
حمن پو Alicante, Spain
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creator QS:P170,Q28147777

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کس دے ناں: Diego Delso
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Calcareous tubeworm (Serpula vermicularis), Arrábida Natural Park, Portugal

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چترن

copyrighted English

۳۱ جولائی 2020

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۰.۰۰۵ سکنٹ

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image/jpeg

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