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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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).

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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Muller, 1776 - + + Porifera: Asteromeyenia Weltner, 1913 - - - Cumacea: Pseudocuma G.O.
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).
17.27 5.69 2.54 1.43 Cumacea Cumacea UI Decapoda 30.91 3.05 38.74 12.98 Caridea Caridea UI 4.55 0.25 0.94 0.05 Hippolite californiensis 10.00 0.89 2.22 0.31 Alpheus sp.
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.
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.
Prey name %F %N %W Polychaeta (worm) 79.8 11.4 9.2 Gastropoda (snail) 14.0 0.8 0.4 Bivalvia (clam) 55.0 6.1 2.1 Cephalopoda (squid and octopus) 10.1 0.5 2.1 Copepoda 0.8 0.0 0.0 Peracarida Mysidacea (mysid) 31.8 11.5 0.2 Cumacea (cumacean) 13.2 0.9 0.0 Amphipoda (amphipod) 17.1 1.2 0.0 Euphausiacea (euphausiid) 15.5 10.0 0.7 Natantia (unidentified shrimp) 12.4 0.7 0.1 Caridea (shrimp) 12.4 1.2 1.2 Hippolytidae (shrimp) 17.8 1.2 0.2 Pandalidae (shrimp) 41.1 5.7 2.3 Crangonidae (shrimp) 76.0 18.9 13.3 Reptantia (unidentified crab) 11.6 0.5 1.9 Paguridae (hermit crab) 22.5 1.3 9.5 Decapoda Brachyura (crab) 0.8 0.0 0.1 Hyas sp.
Seasonal abundance of Coricuma nicoyensis Watling and Breedy, 1988 (Crustacea: Cumacea) on a tropical mud flat.
Amphipoda Gammaridea 3.9 3.0 12.5 86.3 Cumacea 5.9 5.0 12.5 136.3 Copepoda Calanoida Eucalanus californicus 5.9 15.0 12.5 261.3 Insecta Coleoptera Unidentified 2.0 14.0 12.5 200.0 Hemiptera Hesperocorixa spp.