Siolicaris sioli ( Noodt, 1963a )

Reddy, Ranga & Arbizu, Martínez, 2012, Revision of the genus Siolicaris Jakobi, 1972, with redescriptions of S. sioli (Noodt, 1963) and S. jakobi (Noodt, 1963) from South America, and S. sandhya (Ranga Reddy, 2001) comb. nov. from India (Copepoda, Harpacticoida,, Zootaxa 3493, pp. 49-71 : 52

Siolicaris sioli ( Noodt, 1963a)

( Figs. 1–2)

Synonymy. Parastenocaris sioli Noodt — Noodt (1963a), Rouch (1986), Ranga Reddy (2001).

Parastenocaris siolii Noodt ; incorrect spelling— Jakobi (1972), Löffler (1981), Dussart (1984), Rouch (1986), Dussart & Defaye (1990), Reid (1998).

Siolicaris siolii (Noodt) , incorrect spelling— Corgosinho et al. (2008).

Siolicaris sioli (Noodt) —Corgosinho et al. (2010).

Material examined. Noodt’s collection: Parastenocaris sioli , syntype (Case 2, slide 17), 2 ♂ dissected and mounted on a single slide; Parastenocaris sioli , paratype (Case 2, slide 15), 1 ♂ dissected and mounted on a single slide.

Type locality. Coastal groundwater of the Amazon River at Santarém-PA ( Brazil) .

Description. Male. Body size of 330 µm (after Noodt 1963a). Telson smooth, anal operculum smooth and slightly concave; anal sinus bordered by fine spinules ( Fig. 1A and Noodt 1963a, p. 132, fig. 64). Furca ( Figs. 1A) with 7 setae; setae I–III proximally inserted, anterior to seta VII; seta II reduced; seta IV subdistal, inserting dorsally, on outer margin of furca; seta V inserting on the distal margin of furca; seta VI shorter than seta V, inserting beneath it; seta VII approximately of the same size as seta VI, socketed at basis and inserted dorsally, close to inner margin of furca.

A1 ( Fig. 1B–F) haplocer, 8-segmented and prehensile, 7 th segment without a distal inner apophysis; armature beginning with proximal segment: 0/6/4/1/5+Ae/2 [1 hyaline spine (dotted structure) and 1 setae]/2 [1 hyaline spine (dotted structure) and 1 distal seta]/9+Ae; distal segment with distal hyaline margin.

A2 ( Fig. 2A) with allobasis; abexopodal margin ornamented with 2 spinules; 1-segmented exp with 1 seta, and 1-segmented enp bearing 7 setae.

Md ( Fig. 1G) coxal gnathobasis bearing 1 seta and 1-segmented palp with 2 setae.

Mx1 ( Fig. 1H) praecoxal arthrite with 5 elements (1 dorsal surface seta, 3 claw-like pinnate spines and 1 slender seta), coxa and basis not observed.

Mx2 ( Fig. 1I) basis with 2 endites, proximal endite with 1 seta, distal endite with 2 slender setae and 1 pinnate spine, proximal endopodal segment drawn into a claw, distal endopodal segment with 2 setae.

Mxp ( Fig. 1I–J) subchelate, composed of syncoxa, basis, 1-segmented endopod fused to the claw-like apical seta.

P1 ( Fig. 2G) coxa bare; basis with small outer seta. Exp 3-segmented, exp-1 with outer spine, exp-2 unarmed, exp-3 with 2 outer spines and 2 geniculate setae of different lengths; enp 2-segmented, slightly longer than exp, enp-1 as long as the combined length of first 2 exopod segments, enp-2 with 1 apical outer spine and 1 apical geniculate seta.

P2 ( Fig. 2B) coxa bare; basis without outer seta, with outer pore and row of spinules on the outer margin; exp 3-segmented, exp-1 with long outer spine and hyaline frill on distal inner corner; exp-2 without armature and with distal row of long spinules; exp-3 with 3 setae, hyaline frill on distal inner corner and row of long spinules on outer distal corner; enp 1-segmented, cylindrical, shorter than exp-1, with 2 spinules on outer margin and distal seta.

P3 ( Fig. 2C–D) coxa bare; basis rectangular, longer than broad, with row of strong spinules on outer margin, below the insertion of outer seta, and pore; exp with 3 outer spinules, apophysis short, robust, 1-segmented, with rounded tip and strongly bent inwards while in rest position; thumb strong, much longer than apophysis, with pointed tip and roundish distal hyaline membrane, enp reduced to tiny seta.

P4 ( Fig. 2E) coxa with 2 long and strong spinules on anterior margin; basis trapezoidal, with an outer seta and pore; exp 3-segmented, exp-1 with outer spine and hyaline frill on distal inner corner; exp-2 unarmed and with distal row of long spinules; exp-3 with 2 setae and hyaline frill on distal inner corner; enp completely absent.

P5 ( Fig. 2F) trapezoidal, without inner process, with inner row of small spinules and 3 setae, all distally inserted; both limbs close to each other, connected by short, triangular intercoxal sclerite.

P6 as an irregular plate with lateral triangular projections.

Female. Unknown.