Planche 1 issued from : O. Tanaka & M. Omori in Publs Seto Mar. Biol. Lab., 1992, 35 (4/5). [p.255, Fig.1, d-j].
Female: d, forehead (lateral); e, last thoracic segment and urosome (lateral left side); f, Mx1; g, P2; h, endopod of P3; i, endopod of P4; j, P5.

Nota: Cephalosome and 1st metasomal segment separated, 4th and 5th separated.
Prosome/urosome length ratio 81 : 19.
Rostral filaments slender.
A pair of large eyes.
A1 extends beyond end of caudal ramus with 4 segments.
Urosomal segments and caudal rami in the proportional lengths 42 : 21 : 16 : 4 : 17 = 100.
Caudal rami with length/width ratio 2 : 3.
A2 exopod a little longer than endopod (7 : 6).
Mx2 endopod with 7 brushform and 1 vermiform sensory filaments.

Planche 2 issued from : G.D. Grice in Bull. mar. Sc., 1969, 19 (2). [p.452, Figs.55-57];
Female (from G. of Mexico): 55, posterior end of cephalothorax and urosome (lateral right side); 56, Mx1; 57, P5.
Nota: This specimen has a large lens on the forehead, apparently overlooked by Esterly.

Planche 3 issued from : C.O. Esterly in Univ. Calif. Publs Zool., 1911, 6 (14). [Pl.28, Fig.33]. As Xanthocalanus tectus.
Female (from San Diego Region): 33, forehead (lateral).
Nota: Head with a very slight crest. A1 24-segmented and from one-fifth to one-sixth of their length longer than the body. Mx2 with 8 vermiform appendages. Cephalothorax 4-segmented, head and 1st thoracic segment fused

Planche 4 issued from : C.O. Esterly in Univ. Calif. Publs Zool., 1911, 6 (14). [Pl.29, Fig.53]. As Xanthocalanus tectus.
Female: 53, last thoracic segments and urosome (lateral), left side).
Nota: abdomen 4-segmented. Genital segment as long as the 2nd and 3rd together and the anal is very short.

Planche 5 issued from : C.O. Esterly in Univ. Calif. Publs Zool., 1911, 6 (14). [Pl.31, Fig.95]. As Xanthocalanus tectus.
Female: 95, P5.

Planche 6 issued from : O. Tanaka & M. Omori in Publs Seto Mar. Biol. Lab., 1992, 35 (4/5). [p. 256].
Female: Proportional lengths of segments of A1.