Plate 1 Issued from : O.E. Garrote, E. Suarez-Morales & A. Morales-Ramirez in Proc. Biol. Soc. Washington, 2015, 128 (2). [p.139, Fig.1].
Female (from Chatham Bay, Isla del Coco): A-B, habitus (dorsal and lateral, respectively); C, A1 (in two sections) segments 1-12 and 13-22, with enlargement of modified seta (arrow); D, A2; E, Md palp; F, Md edge showing dentition and bicuspidate teeth C1 and C2 (sensu Ohtsuka & Onbé, 1991).
Scale bars: A-B = 0.5 mm; C = 0.25 mm; D-F = 0.1 mm.

Nota: posterior corners of 5th pedigerous somite slightly asymmetrical, subacute, reaching proximal 1/4 of genital double-somite.
- Cephalosome wiith dorsal lenses present, separated by the length of 1/5 lens diameters.
- Rostrum bifid, basally thickened, distally acute, directed ventrally, gap between rostral rami wide.
- Caudal rami slightly symmetrical, right ramus larger than left one; inner margin pilose, each ramus with 5 distal and 1 dorsal setae.
- A1 symmetrical, 22-segmented;
- A2 biramous. Exopod 5-segmented. Endopod 2-segmented; 1st endopodal segment elongate, armed with 2 small sbudistal setae, 2nd endopodal segment with 2 distal lobes, inner lobe bearing 8 setae, outer lobe with 6 setae and 1 small outer spine.
- Md palp biramous; basis subrectangular, armed with 4 setae. Endopod 2-segmented, setal formula 4, 8; exopod 5-segmented, setal formula 0, 1, 1, 1, 3. Gnathobase heavily chitinized, armed with 6 teeth and short spinulose dorsal seta; 3rd (C1), 4th (C2) and 5th tooth bicuspidate; basesof teeth with patches of small spinules.

Plate 2 Issued from : O.E. Garrote, E. Suarez-Morales & A. Morales-Ramirez in Proc. Biol. Soc. Washington, 2015, 128 (2). [p.140, Fig.2].
Female: A, Mx1 showing armature of praecoxal arthrite (pcxa), coxal endite (cxe), coxal epipodite (cxep), 1st basal endite (ben1), 2nd basal endite (ben2), basal exite (bex), exopod (exp), endopod (enp1-3); B, Mx2; C, Mxp; D, urosome showing details of lateral process of genital double-somite (ventral view); E, same (lateral view); F, detail of lateral process; G, rostrum (ventral view); H, same (lateral view).
Scale bars: A-C, F = 0.1 mm; G, H = 0.2 mm.

Nota: Mx1 with praecoxal arthrite well developed and carrying 15 setae (11 on anterior or distal position plus 4 on posteerior surface); coxal endite with 3 subequal apical stout setae; coxal epipodite with 9 plumose setae; basis with 1 long plumose seta (representing basal exite); 1st and 2nd basal endites with 4 and 2 setae, respectively. Basis fused to endopod, endopodal segments 1 and 2 each with 2 and 1 setae, respectively, plus 5 apical setae on distal segment. Exopod 1-segmented with 8 setae.
- Genital double-somite roughly gylindrical, asymmetrical, ventral surface flat; left margin moderately swollen from proximal 1/3, right margin of somite with lateral protuberances, proximal half spinulose ; dorsal surface ornamented with proximal patch of small spinules; digitiform distolateral process present; process posteriorly directed, with 2 small rounded subdistal processes on inner margin.

Plate 3 Issued from : O.E. Garrote, E. Suarez-Morales & A. Morales-Ramirez in Proc. Biol. Soc. Washington, 2015, 128 (2). [p.141, Fig.3].
Female: A, P1; B, P2; C, P3; D, P4; E, right leg P5; F, left leg P5 (paratype specimen); G, variant form of left P5; H, right leg of same specimen with trilobed endopodal ramus.
Scale bars: A-H = 0.1 mm.

Nota: P5 biramous, symmetrical. Coxa and intercoxal sclerite fused; basis subrectangular, with long plumose seta reaching midlength of exopodal segment; endopod 1-segmented, distally bifurcate, about 0.3 times as long as exopodal ramus, inner endopodal process smaller than outer process. One of the paratype specimens with trifurcate endopodal process. Exopod 1-segmented, elongate, with 3 outer and 3 inner spiniform processes plus distal acute process.

Plate 4 Issued from : O.E. Garrote, E. Suarez-Morales & A. Morales-Ramirez in Proc. Biol. Soc. Washington, 2015, 128 (2). [p.143].
Female: Setal and spine formula for the swimming legs P1 to P4.

Plate 5 Issued from : O.E. Garrote, E. Suarez-Morales & A. Morales-Ramirez in Proc. Biol. Soc. Washington, 2015, 128 (2). [p.142, Fig.4].
Male: A, habitus (dorsal); B, urosome (lateral); C, right A1, proximal segments, functional segments numbered; D, same , distal segments; E, details of rounded process on inner margin of penultimate segment; F, P5; G, detail of distal part of left P5; H, same (paratype specimen).
Scale bars: A, B = 0.5 mm; C, D, F, H = 0.25 mm; E, G = 0.1 mm.

Nota: Prosome about 4.5 times as long as urosome (caudal rami excluded).
- 5th pedigerous somite with slightly asymmetrical lateral expansions, each side with small lateral sensillum.
Urosome 5 somites.
- Genital somite asymmetrical, left side swollen, right side unmodifies.
- Anal somite symmetrical, half as long as preceding somite
- Caudal rami slightly asymmetrical, left ramus shorter than right ramus, armed as in female.
- Right A1 with 12 segments, geniculate between functional segments 10-11, reaching middle of 3rd pedigerous somite.
- P5 asymmetrical, uniramous. Left leg P5 relatively short, slender, basis ans coxa fused, subrectangular, with single minute seta on medial surface; exopod 2-segmented, segment 1 cylindrical, about 1.5 times as long as basipod, with short spiniform seta on outer distal margin, 2nd exopodal segment with 3 short setal elements on outer margin, segment bearing 3 digitiform processes apically, middle process longest, inner process covered with dense patch of spinules, remaining 2 processes smooth. Right leg P5 coxa subquadrate, naked; basis cylindrical, with long plumose seta inserted in proximal 1/3 of segment; exopod with 2 segments, forming robust, widely open chela, 1st exopodal segment bearing 4 different processes, proximal strong conical process curving inward (thumb), adjacent 2nd proximal process slender, hook-like, with inner surface ornamented with shallow cuticular ridges, medial processs on segment represented by thumb-like process (arrowed in fig.4F), and an adjacent low rounded protuberance. Distal spiniform element present on distal position of 1st exopodal segment. 2nd exopodal segment forming distally elongate finger of chela, segment distally broadened, spatulate, unbranched, armed with slender proximal seta, 2 spiniform elements on inner surface plus 1 short distal seta.

Plate 6 Issued from : O.E. Garrote, E. Suarez-Morales & A. Morales-Ramirez in Proc. Biol. Soc. Washington, 2015, 128 (2). [p.148, Table 1].
Comparison of the new species P. cocoensis from Isla del Coco, Costa Rica, with other members of the Po,tella fera species group.
GS = genital double-somite; 5PS = fifth pedigerous somite; EXP = exopod.