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a Beroe ovata, b unidentified cydippid, c "Tortugas red" cydippid, d Bathocyroe fosteri, e Mnemiopsis leidyi, and f Ocyropsis sp. [17]. Among animal phyla, the ctenophores are more complex than sponges, about as complex as cnidarians (jellyfish, sea anemones, etc.), and less complex than bilaterians (which include almost all other animals).
Tentaculata is a class of comb jellies, one of two classes in the phylum Ctenophora. [1] [2] The common feature of this class is a pair of long, feathery, contractile tentacles, which can be retracted into specialised ciliated sheaths. In some species, the primary tentacles are reduced and they have smaller, secondary tentacles.
Pleurobrachia bachei is a member of the phylum Ctenophora and is commonly referred to as the Pacific sea gooseberry. These comb jellies are often mistaken for medusoid Cnidaria , but lack stinging cells .
Figure 3. Structure of Ctenophora: Order Cypiddia from Wikipedia Commons. Euplokamis have long tentacles with branches that are used for feeding and movement. These branches are known as tentilla and are held tightly in coils, forming droplet shapes. [12] The tentilla are usually held in coils but can be uncoiled to aid in movement. [14]
A beroid ctenophore with mouth gaping at left. Beroidae is a family of ctenophores or comb jellies more commonly referred to as the beroids.It is the only known family within the monotypic order Beroida and the class Nuda.
Lobata is an order of transparent marine invertebrates belonging to the phylum of Ctenophora in the class Tentaculata, and are commonly referred to as comb jellies or sea gooseberries. [1] There are currently 19 extant known species in the order of Lobata. [2] Members of Lobata exhibit a compressed body in the vertical plane and a pair of oral ...
Platyctenida is the only benthic group of organisms in the phylum Ctenophora. Platyctenida are considered to be a phylogenetically young group along with the orders Lobata and Beroida and are believed to have stemmed from an ancestral version of the order Cydippida, after some kind of bottleneck effect in the phylum. This has been supported by ...
Pleurobrachia is a common genus of Ctenophora (an exclusively marine phylum). Along with the genus Hormiphora, [1] it generally has the common name sea gooseberry. It contains the following species: [2] Pleurobrachia arctica Wagner, 1885; Pleurobrachia australis (Benham, 1907) Pleurobrachia bachei L. Agassiz, 1860