Malacostraca


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Malacostraca

[‚mal·ə′kä·strə·kə]
(invertebrate zoology)
A large, diversified subclass of Crustacea including shrimps, lobsters, crabs, sow bugs, and their allies; generally characterized by having a maximum of 19 pairs of appendages and trunk limbs which are sharply differentiated into thoracic and abdominal series.
References in periodicals archive ?
External morphology of limb development in the amphipod Orchestia cavimana (Crustacea, Malacostraca.
Organismos de los ordenes Collembola, Malacostraca, Dermaptera e Isoptera, con un numero de familias inferior a diez, son tan importantes como los anteriores.
ARTHROPODA, MALACOSTRACA AMPELISCIDAE Ampelisca agassizi AMPITHOIDAE Ampithoe dalli Ampithoe sp.
1 0,5 1,0 ARTHROPODA Malacostraca Decapoda Acanthocyclus gayi Lucas, 1844 15,9 9,0 Acanthocyclus hassleri Rathbun, 1898 3,4 1,7 Allopetrolisthes angulosus (Guerin, 1835) 3,3 3,7 Allopetrolisthes punctatus (Guerin, 1835) 5,5 5,3 Alpheus inca Wicksten & Mendez, 1981 0,1 0,3 Betaeus truncatus Dana, 1852 0,2 0,4 Betaeus emarginatus (Milne Edwards, 1837) 0,1 0,3 Brachiura indet.
Caprellidea, a suborder of the order Amphipoda (Crustacea, Malacostraca, Peracarida), comprises more than 300 described species and is classified into eight families (Caprellidae, Caprellinoididae, Caprogammaridae, Cyamidae, Paracercopidae, Pariambidae, Phtisicidae, and Protellidae; Laubitz, 1993; Martin and Davis, 2001).
TABLE 2 Number species per taxonomic group Number of species Cyanobacteria 5 Bacillariophyta 3 Dinoflagellata 14 Chlorophyta 10 Rhodophyta 28 Ochrophyta 6 Magnoliophyta 5 Protozoa: Foraminifera 33 Cnidaria 100 Anthozoa 23 Scyphozoa 2 Hydrozoa 75 Ctenophora 1 Plathyhelminthes 9 Acanthocephala 2 Nematoda 1 Annelida 4 Sipunculida 2 Mollusca 93 Bivalvia 55 Gastropoda 38 Crustacea 147 Malacostraca 101 Decapoda 94 Maxillopoda 44 Other Crustacea 2 Pycnogonida 1 Bryozoa 9 Echinodermata 11 Chaetognatha 1 Chordata 92 Fishes 82 TOTAL 577 Fig.
Adicionalmente, para los crustaceos de la clase Malacostraca, dada su representatividad y variabilidad taxonomica, se considero la clasificacion hasta ordenes, incluyendo 11 ordenes, lo que hizo un total de 36 grupos analizados.
The structure of the ommatidia of the Malacostraca (Crustacea)--a phylogenetic approach.
In Malacostraca, the heart is neurogenic and in adults dependent for its beating on the impulses from the ganglion.