Planctosphaera pelagica is a hemichordate and the only known representative of the class Planctosphaeroidea.
| Planctosphaera | |
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| Scientific classification | |
| Kingdom: | |
| Phylum: | |
| Class: | Planctosphaeroidea
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| Genus: | Planctosphaera
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| Species: | P. pelagica
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| Binomial name | |
| Planctosphaera pelagica Spengel, 1932
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The species is known only by its free swimming larvae. The larvae are tornaria larvae similar to those of the closely related Enteropneusta, which possess a ciliated band to capture food particles. Planctosphaera pelagica is unique in possessing mucus-secreting glands around the ciliated band. Possible uses of the mucous glands include assisting in feeding or deterring predators and parasites. Planctosphaera pelagica larvae are also larger than enteropneust larvae. It is due to the mucous glands and size difference they are usually given their own class.[1]
References
edit- ^ Hart, M.W.; R.L. Miller; L.P.Madin (November 1994). "Form and feeding mechanism of a living Planctosphaera pelagica (phylum Hemichordata)". Marine Biology. 120 (4): 521–533. Bibcode:1994MarBi.120..521H. doi:10.1007/BF00350072. S2CID 83621038.
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