Isopoda


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Related to Isopoda: Oniscidea

Isopoda

[ī′säp·ə·də]
(invertebrate zoology)
An order of malacostracan crustaceans characterized by a cephalon bearing one pair of maxillipeds in addition to the antennae, mandibles, and maxillae.

Isopoda

 

an order of higher crustaceans. The body, which is flattened in a dorsoventral direction, is from 0.1 to 27 cm long (1–2 cm usually). The eyes are sessile. One or, less frequently, two thoracic somites are fused with the head, and one or several abdominal somites are fused with the telson. The first pair of thoracic limbs have been transformed into maxillipeds. The remaining seven pairs are uniramose and are of approximately the same length and structure. The abdominal limbs are platelike and partially transformed into gills. The heart is in the abdominal section. Development is mostly direct. The female carries the embryos and young in a brood pouch formed by processes of the thoracic limbs.

There are approximately 4,500 species of isopods, distributed primarily in seas but also encountered in freshwaters and on dry land. Many species are eaten by fish. Mesidothea entomon damages fishnets and the fish caught in them; species of the genus Limnoria gnaw holes in wood, destroying wooden structures.

References in periodicals archive ?
This pattern was verified for Pseudoscorpionida and Araneae (predators), Isopoda and Diplopoda (saprophagous), Formicidae (predators/saprophagous), and "Others".
Further additions to the Tanaidacea, Isopoda and Amphipoda, together with keys for the identification of hitherto recorded marine and fresh-water species.
New terrestrial isopods of the genus Miktoniscus from eastern United States (Crustacea: Isopoda: Oniscoidea).
Why do male terrestrial isopods (Isopoda: Oniscidea) not guard females?
0.2 Copepoda 0.5 Calanoida 0.3 Isopoda 0.03 Ostracoda 0.5 Otras especies 14.7 37.1 Megalopa 9.7 Zoea 55.6 Mollusca Cephalopoda 0.2 Loligo sp.
These habitats differed from those of semi-coke heaps in the high number of Formicidae, Diptera and Isopoda in pitfall traps.
Abundance of arthropods by different methods in 4 year and 8 year old oil palm plantation at Sungai Sedu Estate Arthropods 4 Year old oil palm plantation Pitfall Litter Sweep trap analysis net Insecta Coleoptera 552 551 247 Collembola 530 276 16 Dermaptera 114 157 1 Diplura -- -- -- Diptera 181 7 194 Hempitera 15 10 194 Homoptera 5 10 367 Hymenoptera 4581 1791 1062 (Formicidae) Hymenoptera 13 33 51 (Others) Isoptera 38 3 3 Lepidoptera 44 11 64 Neuroptera 8 1 -- Odonata -- -- 9 Orthoptera 1021 325 561 Psocoptera -- 3 -- Thysanoptera 1 -- -- Unidentified 3 48 4 insects Chilopoda 81 32 1 Diplopoda 19 48 -- Crustacea Amphipoda 234 9 -- Isopoda 22 22 -- Arachnida Acarina 116 321 5 Araneida 489 95 1254 Chelonethida -- 2 -- Phalangida 7 9 1 Total 8074 3764 4034 G.
Class Order Family Genus/species Gastropoda Stylommatophora Polygridae Patera perigrapta PILSBRY Malacostraca Isopoda Trichoniscidae Caucasonethes sp.