Eocyzicus careyensis,

Tippelt, Lisa & Schwentner, Martin, 2018, Taxonomic assessment of Australian Eocyzicus species (Crustacea: Branchiopoda: Spinicaudata), Zootaxa 4410 (3), pp. 401-452: 438

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Eocyzicus careyensis

sp. nov.

Eocyzicus careyensis  sp. nov.

( Fig. 19 c, d and eView FIGURE 19)

Eocyzicus  lineage R Schwentner et al., 2014, 2015b

Etymology. " Careyensis" refers to Lake Carey, which is the only known locality for this species. The species name means "lives in Lake Carey".

Type locality. Western Australia, Lake Carey , 29°10´S, 122°20´E.GoogleMaps 

Type material. Holotype. Female (Western Australian Museum registration number 55044, GenBank KC583813View Materials), collected by B. V. Timms, 08-III-2011. 

Further material examined. No material from other localities available

Description. Holotype female ( Fig. 19 c, d and eView FIGURE 19). Carapace. 5.0 mm high, 8.5 mm long, height/length ratio 0.59; height without "crowded" growth lines 4.7 mm, length without "crowded" growth lines 8.0 mm; shape oval; dorso-posterior corner nearly absent; 13 growth lines, of these twelve "non-crowded" and one "crowded"; umbo small, hemispheric, growth lines present ( Fig. 19cView FIGURE 19).

Head. Condyle rounded; section between condyle and external eye contour concave; eye bulge small, compound eye oval; straight angle between head and rostrum; anterior margin of rostrum straight; transition between anterior and ventral margin angular ( Fig. 19dView FIGURE 19). Antennule with twelve lobules, widely arranged; reaches to third antennary segments. Antenna with twelve antennary segments, middle antennary segment anteriorly with two spines.

Thorax. 23 thorax segments, of these 21 "complete" and two "incomplete" ( Fig. 19eView FIGURE 19); dorsal spines beginning at 13th thorax segment, eight thorax segments with dorsal spines; one dorsal spine at each thorax segment, first dorsal spine smaller than following one, last dorsal spine smaller than preceding one, last "complete" thorax segment without dorsal spine ( Fig. 19 eView FIGURE 19).

Telson. 20 telsonic spines, of these three enlarged, telsonic spines end after base of apex; telson symmetric; telsonic filaments situated between third and fourth telsonic spine. Furca with 22 setae, longer than proximal part of furca; small spine before row of spinules absent, spinules short ( Fig. 19eView FIGURE 19).

Ovigerous flagella situated at 9th and 10th thorax segment.

Differential diagnosis. According to Schwentner et al. (2014) the putative sister species are Eocyzicus armatus  sp. nov. and E. parooensis  . The PCA showed a clear differentiation between E. careyensis  sp. nov. and these two as well as all other species ( Fig. 2cView FIGURE 2). Eocyzicus careyensis  sp. nov. can be morphologically differentiated from E. armatus  sp. nov. and E. parooensis  by the number of all growth lines, number of lobules on the antennules, number of thorax segments with dorsal spines and number of setae on the furca ( Table 2). Eocyzicus armatus  sp. nov. can be delimited following the PSC (Wheeler & Platnick, 2000) and the ESC (Wiley & Mayden, 2000). However, it does not occur in sympatry with any other Eocyzicus  species and, therefore, its species status following the BSC (Mayr, 1942) remains ambiguous.

Distribution and ecology. This species is known only from Lake Carey, a large clear hyposaline lake. Eocyzicus careyensis  sp. nov. does not occur sympatrically with any other studied Eocyzicus  species.


Centro Oriental de Ecosistemas y Biodiversidad