One ctenophore, " Mnemiopsis ", has accidentally been Beroe " helped to mitigate the problem, as " Beroe " preys on other ctenophores.
42.
Martindale and Henry propose a ctenophore-like ancestor with a concentrated nerve cord and two anal pores on opposite sides of the animal in addition to a terminal gut opening.
43.
"' Lobata "'is an order of Ctenophora in the class Tentaculata with smaller tentacles than other ctenophores, and distinctive flattened lobes extending outwards from their bodies.
44.
"' Thalassocalycida "'is a monospecific order of ctenophore, or comb jellies, known from the California Coast, Gulf of Mexico, and west north Atlantic.
45.
The authors also remark that the muscle cells found in cnidarians and ctenophores are often contests due to the origin of these muscle cells being the ectoderm rather than the mesoderm or mesendoderm.
46.
The decline in macrophytes was further compounded by overfishing during the 1970s, while the invasive ctenophore " Mnemiopsis " reduced the biomass of copepods and other zooplankton in the late 1980s.
47.
520 million years old Cambrian fossils also from Chengjiang in China show a now wholly extinct class of ctenophore, named " Scleroctenophora ", that had a complex internal skeleton with long spines.
48.
In ctenophores, bioluminescence is caused by the activation of calcium-activated proteins named photoproteins in cells called photocytes, which are often confined to the meridional canals that underlie the eight comb rows.
49.
Most known animal filarial worms, hookworms ), flatworms ( tapeworms, liver flukes ), cnidarians ( jellyfish, sea anemones, corals ), ctenophores ( comb jellies ), and sponges.
50.
This species, like other ctenophores, has a large body cavity and is carnivorous, feeding on copepods and small crustaceans snagged by its two extremely sticky and robust tentacles ( see Tentaculata ).
