The freshwater Amphipoda (Crustacea) of New Zealand: A review

A revision of the freshwater amphipod genusPhreatogammarusin New Zealand. Part 1: A re‐description ofP. helmsiiChilton, 1918 and a new species from Northland

“…Together with re-descriptions of the type species, P.fragilis, and of P. propinquus from Stewart Island (M. A. Chapman unpubl. data) it will enable corrections to the generic characteristics defined by Barnard & Barnard (1983) and Fenwick (2001a). Both species can be recognised during initial sample sorting by the dorsal spines on the urosomal segments and the elongated 3rd uropods (though some marine and brackish-water genera share this character).…”

Synonymy of the New Zealand corophiid amphipod genus,ChaetocorophiumKaraman, 1979, withParacorophiumStebbing, 1899: Morphological and genetic evidence

“…Chilton's descriptions and records amplified but sometimes confused the pioneer studies of the more reliable G. M. Thomson. Neither generic or specific boundaries are well defined morphologically for any New Zealand freshwater amphipod taxa (Fenwick 2001) and hence it is difficult to assess the importance of the genetic differences between P. excavatum and C. lucasi.…”

“…Until recently (Hurley 1954(Hurley , 1975Barnard 1972;Chapman & Lewis 1976;Barnard & Karaman 1991;Fenwick 2001), the corophiid fauna of New Zealand was thought to include a freshwater species in an endemic genus, Chaetocorophium lucasi (Hurley, 1954), known then from three central North Island lakes but now also from coastal habitats , and an upper estuarine species, Paracorophium excavatum (Thomson, 1884). New studies have revealed a situation of considerable taxonomic and ecological complexity, with evidence of morphological confusion between P. excavatum, the type species of the genus, and a related Australian species, P. brisbanensis (Chapman 2002), and also of possible cryptic speciation (as shown by allozyme analyses) within the New Zealand ChaetocorophiumParacorophium complex Schnabel et al , 2000Stevens & Hogg unpubl.…”

A revision of the Phreatogammaridae (Crustacea, Amphipoda) of New Zealand. Part 2:Phreatogammarus fragilisandP. propinquus

“…The animals were dissected in glycerol and mounted in glycerine jelly with Rose Bengal as a stain. Hypogean animals were collected as in Fenwick (2001). Drawings were made with the aid of a drawing tube.…”

“…Little further has been published on them since except for a brief account in Chapman & Lewis (1976) which drew mainly on Hurley's (1954) work. Fenwick (2001) reviewed their taxonomic history and collated many records of hypogean phreatogammarids (Fenwick 2000).…”