Overview

Brief Summary

The tanaids are a group of around 1,500 known species of mostly small (0.5 to 2 cm long) Peracarida that occur worldwide. They are mainly marine and benthic (bottom-dwelling), but a handful of species live in brackish or nearly fresh water. They often live in burrows or tubes and are known from ocean depths ranging from coastal (1 to 2 m) to around 9000 m. Many are suspension feeders, but some are detritivores or predators. Although most species in this group are free-living or tube-dwelling, Exspina typica have been found in the intestine and body cavity of deep sea holothuroid echinoderms ("sea cucumbers"). The tanaids were found to actively "dig" into the host's skin, grasping tissue with their claws and producing tunnels in the body wall.

(Brusca and Brusca 2003; Alvaro et al. 2011; Kakui et al. 2011 and references therein)

Kakui et al. (2011) analyzed phylogenetic relationships within Tanaidacea using data from the 18S rRNA gene.

An excellent online source on the Tanaidacea is Gary Anderson's Peracarida Taxa and Literature website.

  • Alvaro, M.C., M. Blazewicz-Paszkowycz, N. Davey, and S. Schiaparelli. 2011. Skin-digging tanaids: the unusual parasitic behaviour of Exspina typica in Antarctic waters and worldwide deep basins. Antarctic Science 23(4): 343-348.
  • Brusca, R.C. and G.J. Brusca. 2003. Invertebrates, 2nd edition. Sinauer Associates, Sunderland, Massachusetts.
  • Kakui, K., T. Katoh, S.F. Hiruta, N. Kobayashi, and H. Kajihara. 2011. Molecular Systematics of Tanaidacea (Crustacea: Peracarida) Based on 18S Sequence Data, with an Amendment of Suborder/Superfamily-Level Classification. Zoological Science 28(10): 749-757.
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Comprehensive Description

Additional information

first introduced as a name for a taxonomic order of Malacostraca by Hansen, 1895:4; Dana, 1849:425 is given credit as the authority because the name is based on the word “Tanaidæ” which he introduced as a family name when tanaids were included in the Isopoda
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Source: World Register of Marine Species

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage

Barcode of Life Data Systems (BOLD) Stats
                                        
Specimen Records:353Public Records:106
Specimens with Sequences:106Public Species:13
Specimens with Barcodes:104Public BINs:24
Species:49         
Species With Barcodes:14         
          
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Barcode data

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Locations of barcode samples

Collection Sites: world map showing specimen collection locations for Tanaidacea

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