Planche 1 issued from : F.D. Ferrari in Proc. Biol. Soc. Washington, 1995, 108 (2). [p.187, Fig.12].
Female: A, genital complx (ventral); B, idem (latera lright side); C, P5 (posterior, exopod detached).

Male: D, P5 (posterior); E, left exopod 1 and 3 of P5 (anterior).
bar: 0.1 mm.

Planche 2 issued from : H.C. Yeatman in J. Tenessessee Acad. Sci., 1969, 44 (1). [p.9, Pl.I].
Female (from Bermuda): 1, habitus (lateral); 3, caudal rami (left ramus with normal setation, right with abnormally forked setae; dorsal view); 5, A1; 7, A2; 8, Md; 9, Mx1; 10, Mx2; (showing variations in number of setae); 12, P1; 13, proximal segments of exopod of P1; 15, P3; 16, P4.
Nota: A1 26-segmented (Esterly reported 25 segments by error); these antennae reach at least to the distal ends of the caudal rami. A prominent rostrum, bent ventrally. Urosome 4-segmented, the 4th very short (Esterly failed to note the joint separating the 4th segment. Caudal rami generally divergent, about 3 times longer than broad, and with hairs on the inner borders.

Male: 2, habitus (lateral); 6, right A1.
Nota: Left A1 26-segmented; right 24-segmented, geniculate.

Planche 3 issued from : H.C. Yeatman in J. Tenessessee Acad. Sci., 1969, 44 (1). [p.10, Pl.II, figs.17-20].
Female: 17, P5.

Male: 18, P5 (anterior view); 19, right leg of P5 (posterior view); 20, left leg of P5 (posterior view).

Planche 4 issued from : M.S. Wilson in Proc. U.S. Nat. Mus., 1958, 108 (No 3398). [p.170].
Female: P5 of five species Ridgewayia. Ratio of certain characters of endopod segment 2, expressed as percentage of total length of inner margin of segment.
A: distance between base of inner margin and placement of 1st inner seta; B, distance between base of inner margin and placement of 1st outer seta; C: length of outer spinous process; D: length of basal joint of outer apical seta.

Planche 5 issued from : C.O. Esterly in Proc. Am. Acad. Arts Sci., 1911, 47 (7). [Pl.I, Fig.4]. As Lampoidopus marki.
Female (from Bermuda Is.): 4, habitus (lateral).
Nota: A1 25-segmented, reach to the end of the caudal rami

Planche 6 issued from : C.O. Esterly in Proc. Am. Acad. Arts Sci., 1911, 47 (7). [Pl.2, Figs.13, 14, 20, 21]. As Lampoidopus marki.
Female: 13, part of last thoracic segment and urosome (dorsal); 21, forehead (lateral).

Male: 14, last two thoracic segments and urosome (lateral); 20, forehead, shopping rostrum (ventral).

Planche 7 issued from : C.O. Esterly in Proc. Am. Acad. Arts Sci., 1911, 47 (7). [Pl.3, Figs.25, 26, 28, 29, 30, 31, 34]. As Lampoidopus marki.
Female: 25, Mx1; 26, Md (cutting edge); 28, Mx2; 29, P5; 31, Md (mandibular palp).
Nota: Right and left P5 symmetrical, endopodite 2-segmented, exopodite 3-segmented, a peculiarity is the attachment of the terminal segment of the exopodite at the middle of the inner margin of the 2nd segment.

Male: 30, right P5; 34, left P5.
Nota: Each endopodite is 1-segmented, that of right leg being club-shaped, that of the left shorter and broader; Exopodite of the right leg is 2-segmented, that of the left 3-segmented with the terminal segment peculiarly modified

Planche 8 issued from : C.O. Esterly in Proc. Am. Acad. Arts Sci., 1911, 47 (7). [Pl.4, Figs.35, 38, 42]. As Lampoidopus marki.
Female: 38, Mxp (bristles not shown); 42, P1.

Male: geniculating part of right A1.
Nota: Right A1 23-segmented, with a grasping organ, the terminal portion of the grasping is 4-segmented; left A1 25-segmented

Planche 9 issued from : D.F. Figueroa & K.L. Hoefel in J. Crustacean Biol., 2008, 28 (1). [p.145, Table 2]. Characters female of the R. marki species-group.

Planche 10 issued from : D.F. Figueroa & K.L. Hoefel in J. Crustacean Biol., 2008, 28 (1). [p.145, Table 3]. Characters male of the marki species-group.