Akanthophoreus

Bird, Graham J, 2007, Family incertae cedis *, Zootaxa 1599, pp. 121-149 : 132

Akanthophoreus cf longiremis ( Lilljeborg, 1864)

(restricted synonymy and bibliography)

Tanais longiremis Lilljeborg, 1864 : Lilljeborg, 1865: 23 –25.

Leptognathia longiremis: G.O. Sars, 1896: 27 , plate XII (= L. gracilis ( Krøyer, 1842) not longiremis sensu Lilljeborg, 1864 ). Hansen, 1913: 69 –70, 74–76, plate VII figs 3a–e. Lang, 1957: 49, fig N. Kudinova-Pasternak, 1977: 125 [an uncertain synonymy].

Akanthophoreus longiremis ( Lilljeborg, 1864) : Sieg, 1986a; 23, 28, fig 10 (partim, not those derived from G.O. Sars 1896).

Paraleptognathia longiremis ( Lilljeborg, 1864) : Guerrero-Kommritz, 2004: 33 –38, figs 13–15 [an uncertain synonymy].

See Sieg (1983) for the very complex synonymy and bibliography up to date of publication.

Remarks. This is an Akanthophoreus species with a very unfortunate taxonomic history, largely because of the error in depicting A. gracilis as this species in the canonical account of Norwegian tanaidaceans ( G.O. Sars 1896). The figure given by Hansen (1913) remains the best overall illustration of the species, along with Lang (1957) for cheliped and pereopod variation. Actually a fairly scarce species from shelf and shallow bathyal western European waters at the interface of cold Arctic and warmer Atlantic water-masses ( Bird 2001; ined.), A. longiremis has been (doubtfully) recorded from the Izu-Ogasawara Trench, 6770–6890 metres (Kudinova- Pasternak 1977). It is possible that the following species, A. undulatus n.sp., is the basis for this record, if Kudinova-Pasternak’s view of L. longiremis was that of G.O. Sars.