Cumacea


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Cumacea

[kyü′mās·ē·ə]
(invertebrate zoology)
An order of the class Crustacea characterized by a well-developed carapace which is fused dorsally with at least the first three thoracic somites and overhangs the sides.

Cumacea

 

an order of invertebrates of the subclass of higher crustaceans. The body measures 1–18 mm long (only a few species reaching 35 mm). There are two divisions, the cephalothorax and the narrow abdomen. The cephalothoracic carapace covers the three front thoracic somites and is fused with them. There is a single eye. Of the three pairs of maxillipeds, the first bears complexly constructed gills. In the female, the second and third pairs of maxillipeds have plates that form the brood pouch. The five free thoracic somites each have a pair of two-jointed limbs. Abdominal appendages are found only on the male. There are about 600 species, living primarily in the seas. They serve as food for fish. Members of this order have been acclimatized to some reservoirs (for example, Pseudocuma cercaroides is found in the Dnieper Reservoir).

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Phylum Taxa Brava Navegantes Total Beach Beach Annelida Capitellidae 8 114 122 Paraonidae 42 11 53 Lumbrineridae 35 0 35 Spionidae 25 5 30 Onuphidae 25 1 26 Mageloniidae 17 2 19 Orbiniidae 7 0 7 Pilargidae 4 2 6 Oweniidae 4 1 5 Goniadidae 3 0 3 Nereidae 3 0 3 Ampharetidae 1 0 1 Flabelligeridae 1 0 1 Glyceridae 1 0 1 Magelona 1 0 1 variolamellata Poecilochaetidae 1 0 1 Sigalionidae 1 0 1 Sigambra 1 0 1 Arthropoda Amphipoda 137 3 140 Cumacea 13 11 24 Brachyura 7 0 7 Decapoda 3 0 3 Tanaidacea 2 0 2 Echinodermata Ophiuroidea 1 0 1 Enteropneusto Enteropneusto 1 0 1 Mollusca Bivalvia 15 44 59 Gastropoda 3 1 4 Heleobia 1 0 1 Nemertea Nemertea 7 2 9 Total 362 195 557 Table 2.
Recent number of species of some zoobenthic groups in the whole Mediterranean Sea was as follows: 1 000 Polychaeta species, 2 000 Mollusca, 154 Echinodermata, 1 935 Arthropoda (Amphipoda 451, Decapoda 340, Isopoda 165, Anisopoda 43, Cumacea 91 and miscellaneous 845 species), 33 Sipuncula, 500 Bryozoa and 622 Porifera (UNEP/MAP 2004).
2004) recorded 81 crustacean species as a Cystoseria facies (1 Cumacea, 2 Tanaidacea, 23 Isopoda, 36 Amphipoda and 19 Decapoda) from the Turkish Aegean coasts whereas Kirim et al.
guttatus, solo algunos componentes alimentarios (Bregmaceros longipes y Anchoa lucida entre los peces, Stomatopoda, Cumacea, la familia Pandalidae y larvas megalopa de Brachyura entre los crustaceos) sobrepasaron el 2% de la abundancia numerica total.
In terms of meiofauna composition, Nematoda was the dominant group in all stations, but Cumacea and Oligochaeta were more representatives in stn.
a) Nematoda, b) Copepoda, c) Nauplii, d) Gastrotricha, e) Kinorhyncha, f) Oligochaeta, g) Polychaeta, h) Cumacea, i) Acari.
Los grupos son: cinco grupos de productores primarios: Chlorophyta, Phaeophyta, Rodhophyta, fanerogamas marinas y microfitobentos; ocho grupos de invertebrados: Echinodermata, Palinuridae, Galatheidae, Penaeidae, Haliotidae, otros crustaceos, invertebrados suprabentonicos (Amphipoda, Cumacea, Decapoda, Mysidacea) y zooplancton; cinco grupos de peces: Batoideos, Pleuronectiformes, Gerreidae, Serranidae y Sciaenidae, tres grupos de mamiferos marinos: ballena gris (Eschrichtius robustus), lobo marino (Zalophus californianus) y delfin comun (Tursiops truncatus), un grupo de tortuga marina: Chelonia mydas, un grupo de aves: Branta bernicla nigricans y uno de detritos.