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- الصدفيات الدقيقة (الاسم العلمي: Microconchida)، وهي رتبة لمجموعة «ديدان» صغيرة متحجرة وملفوفة حلزونيا، وأنبوبية الشكل من طائفة لامسات كانت موجودة حول العالم منذ العصر الأوردوفيشي العلوي وحتى العصر الجوراسي الأوسط (الباثوني). لديها أصداف من الكالسيت الصفيحي، وعادة ما تكون مع مرقطة كاذبة أو نقطية بصيلية الشكل. (ar)
- The order Microconchida is a group of small, spirally-coiled, encrusting fossil "worm" tubes from the class Tentaculita found from the Upper Ordovician to the Middle Jurassic (Bathonian) around the world. They have lamellar calcitic shells, usually with pseudopunctae or punctae and a bulb-like origin. Many were long misidentified as the polychaete annelid Spirorbis until studies of shell microstructure and formation showed significant differences. All pre-Cretaceous "Spirorbis" fossils are now known to be microconchids. Their classification at the phylum level is still debated. Most likely they are some form of lophophorate, a group which includes phoronids, bryozoans and brachiopods. Microconchids may be closely related to the other encrusting tentaculitoid tubeworms, such as Anticalyptraea, trypanoporids and cornulitids. (en)
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- 3893 (xsd:nonNegativeInteger)
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- Palaeoconchus angulatus on a brachiopod from the Middle Devonian of Michigan (en)
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- *Microconchus
*Palaeoconchus
*Annuliconchus
*Punctaconchus
*Polonoconchus
*Helicoconchus (en)
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- الصدفيات الدقيقة (الاسم العلمي: Microconchida)، وهي رتبة لمجموعة «ديدان» صغيرة متحجرة وملفوفة حلزونيا، وأنبوبية الشكل من طائفة لامسات كانت موجودة حول العالم منذ العصر الأوردوفيشي العلوي وحتى العصر الجوراسي الأوسط (الباثوني). لديها أصداف من الكالسيت الصفيحي، وعادة ما تكون مع مرقطة كاذبة أو نقطية بصيلية الشكل. (ar)
- The order Microconchida is a group of small, spirally-coiled, encrusting fossil "worm" tubes from the class Tentaculita found from the Upper Ordovician to the Middle Jurassic (Bathonian) around the world. They have lamellar calcitic shells, usually with pseudopunctae or punctae and a bulb-like origin. Many were long misidentified as the polychaete annelid Spirorbis until studies of shell microstructure and formation showed significant differences. All pre-Cretaceous "Spirorbis" fossils are now known to be microconchids. Their classification at the phylum level is still debated. Most likely they are some form of lophophorate, a group which includes phoronids, bryozoans and brachiopods. Microconchids may be closely related to the other encrusting tentaculitoid tubeworms, such as Anticalyptra (en)
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- صدفيات دقيقة (ar)
- Microconchida (en)
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