Ctenoplan [2] ( lat. Ctenoplana , from Greek ktéis (ktenós) - crest and Lat. Planus - flat) - the genus of ctenophores from the platikenid order. A peculiar marine organism discovered by Professor A. A. Korotnev in 1886 near the Sunda Islands ; in 1896, Willey found a sexually mature (male) specimen.
| Ctenoplan |
| Scientific classification |
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| Family: | Ctenoplanidae Willey, 1896 |
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| International scientific name |
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Ctenoplana Korotneff , 1886 |
| Synonyms |
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- Diploctena [1]
- Planoctena [1]
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Previously, the xenoplane and the whole cell were considered life forms connecting the cenophore with turbellaria [2] : like the last, the xenoplan is creeping and its intestines are incorrectly branched, but it retains two tentacle-like tentacles and 8 ridges that can be drawn into the skin recess [3] . Now the xenoplane is considered a specialized branch of ctenophores [2] .
There is an aboral organ. Sexual products (unlike ktenofor) come out through special openings on the aboral side. Ctenopods of dioecious, development unknown [3] .
The body is brightly colored, strongly flattened. The mouth is located in the center of the side of the body facing the substrate. On the other side of the body are statocysts , ridges and tentacles [2] .