Planche 1 issued from : T. Park in Bull. Scripps Inst. Oceanogr. Univ. California, San Diego, 1995, 29. [p.189, Fig.79].
Female: a, forehead (left side); b, urosome (left); c, genital somite (left); d, distal end of urosome (dorsal); e, outer lobe of Mx1; f, exopod of P1 (anterior); g, exopod of P2 (anterior).
Nota: Distal end of prosome on each side broadly rounded. Cephalosomal appendages as in P. glacialis except that outer lobe of Mx1 with 6 long setae plus 1 minute seta proximally. In P1 exopod, outer spine of 1st segment small; that of 2nd segment extending beyond base of following outer spine by about 1/4 its length. Genital flange nearly triangular, with long, convex anterior side and short, steep posterior side; medial margin of genital flange emarginate and thereby flange is divided into anterior and posterior lobes; posterior edge of genital field produced distally into distinct tubercular outgrowth.

Male: h, forehead (left); i, last pedigerous and genital somites (left); j, exopod of P1 (anterior); k, exopod of P2 (anterior); l, distal exopodal segments of left 5th leg (medial, tilted clockwise); m, serrated lamella of left 5th leg exopod (lateral, tilted clockwise).
Nota: Cephalosomal appendages similar to those of P. malayensis, P. glacialis

Planche 2 issued from : T. Park in Antarctic Res. Ser. Washington, 1978, 27. [p.265, Fig.108]. As Euchaeta biconvexa.
Female: A, habitus (lateral); B, forehead (lateral); C, D, E, F, distal end of metasome and genital segment (dorsal, ventral, left side, and right side, respectively); G, outer lobe of Mx1; H, P1; I, P2. P1-2: legs (anterior).
Nota from Bradford & al. (1983, p.28):
- P1 exopod: Aa < 1/3 AB; Bb > BC; Cc > 1.1/2 BC.
- P2 exopod: Aa = AB + 3/4 Bb; Bb = BC + 1/3 Cc; Cc < CD. (see code of lengths outer spine in the Genus' figure of Paraeuchaeta, or in Paraeuchaeta sp. A Bradford, 1981).

Planche 3 issued from : T. Park in Antarctic Res. Ser. Washington, 1978, 27. [p.266, Fig.109]. As Euchaeta biconvexa.
Male: A, forehead (lateral); B, C, distal end of metasome and genital segment (left side and right side, respectively); D, P1; E, P2; F, P5; G, H, I, distal part of exopod of left P5 (posterior, anteromedial, and anterolateral, rspectively). P1-5: legs (anterior).
Nota from Bradford & al. (1983, p.28):
- P1 exopod: Aa minute; Bb < 1/2 BC; Cc ± 4/5 BC.
- P2 exopod: Aa < 1/2 AB; Bb ± 1/2 BC; Cc < 1/2 CD. (see code of lengths outer spine in the Genus' figure of Paraeuchaeta, or in Paraeuchaeta sp. A).

Planche 4 Issued from : G.O. Sars in Résult. Camp. Scient. Prince Albert I, 69, pls.1-127 (1924). [Pl.XXXII, figs.15-20]. As Pareuchaeta tumidula.
Female: 15, habitus (dorsal); 16, idem (lateral left side); 17, forehead (lateral); 18, genital somite (lateral left side); 19, genital complex (ventral); 20, anal segment and caudal rami.

Planche 5 Issued from : K.A. Brodskii in Calanoida of the Far Eastern Seas and Polar Basin of the USSR. Opred. Fauna SSSR, 1950, 35 (Israel Program for Scientific Translations, Jerusalem, 1967) [p.217, Fig.130]. As Pareuchaeta pseudotumidula.
Female (from NW Pacif.): habitus (dorsal and lateral left side); forehead (lateral); S2, exopod of P2; corner of the last thoracic segment and urosome (lateral left side); genital segment (lateral right side); Gf, genital segment (ventral).

Male: S5Le, distal segments of left P5.
Nota: This form resembles P. tumidula but differs in its size, the shorter genital segment and caudal rami.

Planche 6 issued from : M.V. Heptner in Trudy. Inst. Okeanol., 1971, 92. [p.109, Fig.17]. As Pareuchaeta tumidula.
Female (from Kuril-Kamchatka Trench)..
Nota: Formula of the exopod of P1 spines on the last two segments, successively : Aa < AB (Aa < 1/2 AB); Bb > BC (Bb = 1 1/4 BC); Cc > BC (Cc ≈ 1 1/2 BC); variant: Aa < 1/4 AB, Aa = 1/2 AB, Aa = 2/3 AB; Bb = BC. P2: Aa > AB (Aa = AB + 1/2 Bb); Bb = BC; Cc < CD (Cc ≈ 7/8 CD). Variant: Aa = AC, Aa = AB + 2/3 Bb; Bb < BC (Bb = BC + 1/4 Bb). [cf. legend in drawings of Heptner, 1971, for Pareuchaeta rubra].

Male: ld, left exopod portion of P5.