Henricia regularis Hayashi, 1940

Xiao, Ning, Liao, Yulin & Liu, Ruiyu, 2011, Records of the genus Henricia Gray, 1840 (Echinodermata: Asteroidea: Echinasteridae) from Chinese waters, Zootaxa 3115, pp. 1-20 : 15-16

Henricia regularis Hayashi, 1940

Figures 11 A–F, 12E

Henricia regularis Hayashi, 1940: 137 , pl. 10, figs 3, 4.— Shin & Rho, 1996: 335, pl. 23, figs a–h.

Material examined. East China Sea. Two (R 29– 24 mm, r 7.1 mm, R: r 4.1–3.4; R 24– 20 mm, r 5.4 mm, R: r 4.4–3.7), MBM175712, CN V560B-9, Stn. 0 2, 32°30ʹN,127°00ʹE, 120m, fine sand, AT, coll. ZHANG, 29 May 1978; Two (R 23– 20 mm, r 5.5 mm, R: r 4.2–3.6; R 25– 20 mm, r 5.9 mm, R: r 4.2–3.4), MBM175699, CN V471B- 63, Stn. -9, 27°30ʹN, 125°00ʹE, 106m, fine sand, AT, 10 Oct 1975; One(R 25– 21 mm, r 6.7 mm, R: r 3.7–3.1), MBM175705, CN V470B-26, Stn. -10, 27°30ʹN, 125°30ʹE, 110m, fine sand, AT, coll. WU, 10 Oct 1975; One (R 37– 32 mm, r 8.8 mm, R: r 4.2–3.6), MBM175710, CN V563B-7, Stn. 22, 28°30ʹN, 126°00ʹE, 116m, fine sand and shell, AT, coll. TANG & WU, 5 Jun 1978; One (R 28– 23 mm, r 7.1 mm, R: r 3.9–3.2), MBM176355, CN KY6B- 61, Stn. Z -7, 26°40ʹN, 124°00ʹE, 147m, AT, 9 Jul 1981; Five (R 30– 27 mm, r 7.7 mm, R: r 3.9–3.5; R 26– 21mm, r 6.2 mm, R: r 4.2–3.4; R 24– 21mm, r 6.2 mm, R: r 3.9–3.4; R 24– 22 mm, r 6.0 mm, R: r 4.0–3.7; R 21– 16 mm, r 5.2 mm, R: r 4.0–3.1), MBM175709, CN V499B-94, Stn. -6, 27°30ʹN, 125°30ʹE, 112m, fine sand, AT, 5 May 1976; One (R 40– 37 mm, r 8.5 mm, R: r 4.7–4.4), MBM175717, CN V495B-64, Stn. -5, 28°30ʹN, 125°30ʹE, 110m, AT, coll. ZHANG, 4 Jul 1976; One (R 24– 22 mm, r 6.1 mm, R: r 3.9–3.6), MBM175696, CN V577B-84, Stn. 17, 29°30ʹN, 127°00ʹE, 117m, fine sand, AT, coll. LIU, 29 Jun 1978; One (R 54– 52 mm, r 11.8 mm, R: r 4.6– 4.4), MBM176191, CN V489B-88, Stn. -4, 29°30ʹN, 125°00ʹE, 82m, muddy sand, AT, coll. TANG & XU, 27 Jun 1976; One (R 51– 48 mm, r 11.4 mm, R: r 4.5–4.2), MBM175721, CN V474B-80, Stn. -5, 27°30ʹN, 123°00ʹE, 90m, fine sand, AT, coll. TANG & WU, 11 Oct 1975; Fourteen (R 37– 33 mm, r 9.2 mm, R: r 4.0–3.6; R 31– 28 mm, r 7.7 mm, R: r 4.0–3.6; R 38– 37 mm, r 8.9 mm, R: r 4.3–4.2; R 41– 36 mm, r 9.5 mm, R: r 4.3–3.8; R 37– 33 mm, r 9.2 mm, R: r 4.0–3.6; R 33– 31 mm, r 8.6 mm, R: r 3.8–3.6; R 33– 30 mm, r 8.1 mm, R: r 4.1–3.7; R 38- 35 mm, r 9.0 mm, R: r 4.2–3.9;R 41– 35 mm, r 9.2 mm, R: r 4.5–3.8; R 31– 27 mm, r 8.1 mm, R: r 3.8–3.3; R 36– 35 mm, r 8.9 mm, R: r 4.0–3.9; R 41– 38 mm, r 8.4 mm, R: r 4.9–4.5; R 27– 19 mm, r 5.4 mm, R: r 5.0–3.5; R 41– 32 mm, r 6.0 mm, R: r 6.9–5.3), MBM176422, CN V519B-160, Stn. -3, 27°30ʹN, 124°00ʹE, 105m, fine sand, AT, coll. TANG, 27 Aug 1976; Two (R 30– 29 mm, r 7.7 mm, R: r 3.9–3.8; R 26– 18 mm, r 5.8mm, R: r 4.5–3.1), MBM175720, CN V500B-57, Stn. -4, 27°30ʹN, 124°30ʹE, 99m, gravel and shell, AT, coll. TANG & WU, 5 Jul 1976; Three (R 29– 27 mm, r 6.7 mm, R: r 4.3–4.0; R 32– 29 mm, r 8.1 mm, R: r 4.0–3.6; R 30– 27 mm, r 7.6 mm, R: r 3.9–3.6), MBM175722, CN V496B-46, Stn. -6, 28°30ʹN, 126°00ʹE, 115m, AT, coll. LIU, 4 Jul 1976; Four (R 31– 27 mm, r 6.8 mm, R: r 4.6–4.0; R 29– 25 mm, r 7.4 mm, R: r 3.9–3.4; R 31– 28 mm, r 7.4 mm, R: r 4.2–3.8; R 31– 28 mm, r 7.1 mm, R: r 4.4–3.9), MBM175723, 26 Oct 1978; Two (R 27– 23 mm, r 7.0 mm, R: r 3.9–3.3; R 25– 23 mm, r 6.2 mm, R: r 4.0–3.7), MBM175715, CN V570B-22, Stn. 30, 26°10ʹN, 124°00ʹE, 138m, fine sand, AT, coll. ZHANG, 11 Jun 1978; Thirteen (R 40– 33 mm, r 10.3 mm, R: r 3.9–3.2; R 37– 34 mm, r 8.9 mm, R: r 4.2– 3.8; R 36– 33 mm, r 8.6 mm, R: r 4.2–3.8; R 32– 31 mm, r 7.8 mm, R: r 4.1–4.0; R 34– 33 mm, r 8.9 mm, R: r 3.8– 3.7; R 33– 32 mm, r 8.8 mm, R: r 3.8–3.6; R 32– 28 mm, r 7.4 mm, R: r 4.3–3.8; R 32– 29 mm, r 6.8 mm, R: r 4.7– 4.3; R 37– 33 mm, r 9.0 mm, R: r 4.1–3.7; R 33– 31 mm, r 8.8 mm, R: r 3.6–3.5; R 36– 34 mm, r 8.0 mm, R: r 4.5– 4.25; R 31– 29 mm, r 8.5 mm, R: r 3.6–3.4; R 29– 28 mm, r 7.2 mm, R: r 4.0–3.9), MBM175714, CN V472B-38, Stn. -8, 27°30ʹN, 124°30ʹE, 100m, fine sand, AT, 19 Oct 1975; One (R 41– 39 mm, r 9.1 mm, R: r 4.5–4.2), Dry specimen, CN 220B-30, Stn. 4050, 30°00ʹN, 123°30ʹE, 61m, muddy sand, BT, 4 Feb 1959; One (R 49– 43 mm, r 11.5 mm, R: r 4.3–3.7), Dry specimen, CN P144B-30, Stn. 4081, 28°00ʹN, 122°30ʹE, 79m, muddy sand, 9 Dec 1959; One (R 57– 50 mm, r 12.9 mm, R: r 4.4–3.9), Dry specimen, CN 240-34, Stn. 4082, 28°00ʹN, 123°00ʹE, 86m, muddy sand, 4 Apr 1959.

Distribution. East China Sea, Korea, Japan, 61– 200 m.

Remarks. This species is distinctive in having large abactinal plates (plate area bigger than popular area), generally uniform in size and subquadrate in form, arranged in rather regular oblique transverse rows ( Hayashi 1940). In our specimens morphology of abactinal plates ( Fig. 11 E), the number of spinelets and a single papula ( Fig. 11 E) in abactinal papular areas correspond well with the original description. The observed differences are the following: the holotype has a single series of ventrolateral plate while our specimens occasionally possess a short series of the secondary ventrolateral plate at the arm base; the holotype has 13 to 17 subadambulacral spines while our specimens sometimes possess 9 to 13 subadambulacral spines. We do not regard the presence or absence of the secondary ventrolateral plate as a reliable diagnostic character.

Figures

FIGURE 11. Henricia regularis Hayashi. A, abactinal view; B, actinal view; C, abactinal ray; D, actinal ray; E, cleared abactinal ray showing abactinal plates arranged regularly and small recessed popular areas; F, cleared actinal ray.