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planula
‖ planula Zool. (ˈplænjʊlə) Pl. -æ. [mod.L., a little plane, dim. of plānus plane a.] The flat-shaped ciliated free-swimming embryo of certain Hydrozoa; hence extended to a similar embryo in Cœlenterates generally.1870 Nicholson Man. Zool. 89 The embryo is a free-swimming, oblong, ciliated body, ter...
Oxford English Dictionary
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Planula
Some groups of Nemerteans also produce larvae that are very similar to the planula, which are called planuliform larva. The attaching types include all anthozoans with a planula stage, many coastal scyphozoans, and some hydrozoans.
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Megachile planula
Megachile planula is a species of bee in the family Megachilidae. It was described by Vachal in 1908.
References
Planula
Insects described in 1908
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M. planula
M. planula may refer to a few different species.
, a species of air-breathing land snails in the family Ariophantidae
Magosphaera planula, a species of Protozoa in the clade Catallacta
Megachile planula, a species of bee in the family Megachilidae
, a species of stilt-legged flies in the family Micropezidae
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Magosphaera planula
Magosphaera planula was a spherical multiflagellated multicellular microorganism discovered by Ernst Haeckel in September 1869 while he was collecting
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Aplanulata
The group have lost its planula larval stage, and the only remnants of the medusa stage is when they function as gonophores attached to the polyp.
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Edwardsiella lineata
Upon fertilization, a primary planula develops. When sufficiently developed, or if the host dies, it exits the host and regains its planula larval form.
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Crossota norvegica
Description
Unlike other cnidarians, Crossota norvegica lives its entire life in the planktonic stage or the planula stage, instead of experiencing both the sessile stage and planula stage.
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竹藓属
Aptychella linearifolia Herzog, 1920
Aptychella muelleri Dixon
Aptychella oblongifolia
Aptychella planula (Mitt.) M.Fleisch.
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Euphyllia ancora
The planula become elongated and increasingly active with time free swimming around the water column. Zooxanthellae are first incorporated in the planula tissues during development and may enter through the ectoderm near the oral pore.
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短茎拟疣胞藓属
物种
本属包括以下物种:
短肋竹藓 Clastobryopsis brevinervis,短茎拟疣胞藓
扁枝竹藓 Clastobryopsis planula
粗枝拟疣胞藓 Clastobryopsis robusta
参考文献
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Carukia barnesi
The cycle begins with a planula larvae. This planula will continue to swim until it finds a substrate that it can use as support. Once the planula attaches to a substrate like a coral reef or rock, the organism will morph into a polyp.
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Platygyra lamellina
Neither the eggs nor the planula larvae, which develop about two days later, contains zooxanthellae. The planula larvae settle on the seabed about two months later and undergo metamorphosis into polyps.
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Clytia hemisphaerica
Ovulated eggs are fertilized externally and take approximately 24 hours to develop into planula. previously the front end of the swimming planula).
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Clava multicornis
Anatomy
The larval form (planula) and adult form show two different body plans. The planula is a small, free-living larva, and is diploblastic with two layers: the endoderm and ectoderm with an additional mesoglea.
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