Pleuroxus scopuliferus Ekman, 1900,

Smirnov, Nikolai N., Kotov, Alexey A. & Coronel, Jorge S., 2006, Partial revision of the aduncus-like species of Pleuroxus Baird, 1843 (Chydoridae, Cladocera) from the southern hemisphere with comments on subgeneric differentiation within the genus, Journal of Natural History 40 (27 - 28), pp. 1617-1639: 1629-1630

publication ID 10.1080/00222930600958870

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Pleuroxus scopuliferus Ekman, 1900


Pleuroxus scopuliferus Ekman, 1900 

( Figure 49View Figures 47–55)

Pleuroxus scopuliferus Ekman 1900, p 78  –82, Plate 4, Figures 25–29View Figures 24–32; Frey 1993b, p 163 – 171, Figures 69View Figures 67–75 –99; Smirnov 1996, p 55 –56, Figures 207–211; Kotov and Gololobova 2005, p 3063.

Pleuroxus scopulifer (Ekman)  in Daday 1902, p 262 –263; Olivier 1962, p 250 –251, Plate 7: Figures 5, 6View Figures 1–11.

Not Pleuroxus scopuliferus Ekman  in Pugh et al. 2002, p 1054.

See further synonymy in Frey (1993b).

Lectotype: a single parthenogenetic female, length 0.70 mm, with two eggs, SMNH 5846, selected by Kotov and Gololobova (2005). The ‘‘neotype’’ ZMU 21290View Materials a earlier selected by Frey (1993b) is rejected due to finding of original author’s material ( International Commission on Zoological Nomenclature 2000, Article 75.8).

Type locality

Unknown water body near Morro Chico, km. 146 of the 9, Punta Arenas-Puerto Natales, southern Chile (approximately 52 u 059200S, 71 u 229270W).

Material examined

A single female, the lectotype. The diagnosis below is based predominantly on Frey’s (1993b) redescription.


Body dark brown, not transparent, dorsum with medial keel, postero-ventral angle with one to two denticles. Rostrum long ( Figure 49View Figures 47–55), projecting behind apex of labral keel. Head shield pointed at posterior end, anteriorly makes a long rostrum, PP53.7–4.8 IP. Wellexpressed prominent striation on head shield and valve. Setae at posterior portion of valve ventral margin situated submarginally. Setules on posterior margin of valve situated exactly marginally. Postabdomen wide, significantly narrowing distally, with rounded and slightly prominent dorso-distal angle, its anal margin roughly as long as postanal margin and longer than preanal margin, anal teeth strong, solitary at dorso-distal angle, represented as series of two to four strong denticles in distal half of postanal margin, and then as series of fine setules in its basal portion. Antenna I not reaching tip of rostrum, with short, rounded basal peg. On antenna II, one apical seta on each branch shorter than two other setae. On limb I smallest ODL seta short, two largest IDL setae subequal in size. On inner-distal portion of limb II, scrapers 1–3 with size decreasing basally; setules on gnathobase naked, filter plate II with eight setae. On exopodite III setae 1 and 3 subequal in length, filter plate III with nine setae. Filter plate IV with six setae. Exopodite V with two projections distally to distal seta 1, distalmost projection especially large.


See Frey (1993b).


Southern portions of Chile and Argentina, see Frey (1993b).












Pleuroxus scopuliferus Ekman, 1900

Smirnov, Nikolai N., Kotov, Alexey A. & Coronel, Jorge S. 2006

Pleuroxus scopuliferus

Pugh PJA & Dartnall HJG & McInnes SJ 2002: 1054

Pleuroxus scopulifer (Ekman)

Olivier SR 1962: 250
Daday E 1902: 262

Pleuroxus scopuliferus

Kotov AA & Gololobova MA 2005: 3063
Smirnov NN 1996: 55
Frey DG 1993: 163
Ekman S 1900: 78