Planche 1 issued from : T. Park in Bull. Scripps Inst. Oceanogr. Univ. California, San Diego, 1995, 29. [p.156, Fig.46].
Female: a, forehead (left side); b, urosome (left); c, d, e, genital somite (left, right, ventral, respectively); f, outer lobe of Mx1; g, P1 (anterior); h, P2 (anterior).

Nota: Similar in habitus to P; abyssalis and P. calva but can be distinguished.
Rostrum beginning some distance from suprafrontal sensilla, pointing nearly parallel to anterodorsal margin of forehead.
Urosome elongate.
Dorsal wall of genital somite smoothly and broadly ciurved. Genital flange relatively low, with small but distinct posterior lobe pointing posteroventrad. Posterior edge of genital field produced into low ridge some distance from genital flange. Posterior margin of genital prominence slightly bulging and nearly perpendicular to, and merging in a curve into, posterior ventral wall of somite, which is nearly twice length of posterior margin of prominence excluding posterior edge of genital field.A low tubercular outgrowth close to ventral wall anterior to genital ^prominence on left side of genital somite. Ventrally, genital somite widest anterior to middle, posterior lobe of genital flange pointing mediad (Fig.46-e).
Cephalosomal appendages similar to those of P. abyssalis except that 1st endopodal segment of Mx1 with 7 setae (as in P. malayensis); outer lobe with 6 long setae followed by a small proximal seta (as in P. abyssalis).
Swimming legs similar to those of P. abyssalis except that outer spine of 1st exopodal segment of P1 better developed and in P2 exopod, 4th outer spine only slightly longer than 2nd and incision setarating its marginal lobe short of reaching level of preceding incision.

Planche 2 Paraeuchaeta altibulla Female:
1 - See key to species Groups and independent species of Paraeuchaeta (p.30): malayensis species Group.
2 - Outer spine of 2nd exopodal segment (or the 2nd of the first 2 exopodal segments forming a proximal, compound segment) of P1 normally developed (Fig.46-g).
3 - Outer lobe of Mx1 with 6 long setae in addition to 1 small seta proximally (Fig.46-f).
4 - Genital somite with a conical process on left side close to anterior base of genital prominence (Fig.46-c).
5 - Conical process of genital somite small; posterior lobe of genital flange projecting posteroventrad into conical process (Fig.46-c).