megasclere

megasclere

[′meg·ə‚sklir]
(invertebrate zoology)
A large sclerite.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
2.--SEM photos (A) Cherokeesia armata, megasclere, (B) Cherokeesia armata, strongyle gemmuloscleres, (C) Cherokeesia armata, protruding oxea gemmulosclere, (D) Cherokeesia armata, gemmule, (E) Corvospongilla becki, gemmuloscleres, (F) Coruospongilla becki, megasclere, (G) Corvospongilla becki, microsclere, (H) Coruospongilla becki, gemmule
3.--SEM photos (A) Ephydatia fluvialilis, gemmulosclere, (B) Ephydatia fluvialilis, megasclere, (C) Ephydatia fluvialilis, gemmule, (D) Ephydatia muelleri, gemmulosclere, (E) Ephydatia muelleri, smooth megasclere, (F) Ephydatia muelleri, spiny megasclere, (G) Ephydatia muelleri, geminule
4.--SEM photos (A) Eunapius fragilis, gemmuloscleres, (B) Eunapius fragilis, megasclere, (C) Eunapius fragilis, gemmule, (D) Radiospongilla crateriformis, gemmulosclere, (E) Radiospongilla araleriformis, megasclere, (F) Radiospongilla crateriformis, gemmule
5.--SEM photos (A) Heteromeyenia tubisperma, gemmuloscleres, (B) Heteromeyenia tubisperma, microsclere, (C) Heteromeyenia tubisperma, megasclere, (D) Heteromeyenia tubisperma, gemmule, (E) Heteromeyenia latitenta, gemmulosclere, (F) Heteromeyenia latitenta, microsclere, (G) Heteromeyenia latitenta, macrosclere, (H) Heteromeyenia latitenta, gemmule
6.--SKM photos (A) Racekiela ryderi, gemmulosclere, (B) Racekiela ryderi, gemmulosclere, (C) Rncekiela ryderi, megasclere, (D) Racekiela ryderi, gemmule, (E) Radiospongilla cereMlata, gemmulosclere, (F) Radiospongilla cerebellata, megasclere, (G) Radiospongilla cerebellata, gemmule
7.--SEM photos (A) Spongilla lacustris, gemmulosclere, (B) Spongilla lacustris, microscleres, (C) Spongilla lacuslris, megaclere, (D) Spongilla lacustris, gemmule, (E) Trochospongilla horrida, gemmulosclere, (F) Trochospongilla horrida, megasclere, (G) Trochospongilla horrida, gemmule
8.--SEM photos (A) Trochospongilla leidii, gemmulosclere, (B) Trochospongilla leidii, megasclere, (C) Trochospongilla leidii, gemmule
To determine range, mean, and standard deviation for spicular lengths and rotule diameters 30 to 80 of each type of spicule (megascleres, microscleres, and gemmuloscleres) were measured using the measurement program of the Hitachi TM 3000.
Spicules: megascleres stout, spiny oxeas, 101.8-228 (199.5 [+ or -] 15.8) [micro]m in length; microscleres absent; gemmuloscleres are of two types: strongyie like 17-29.3 (22.4 [+ or -] 2.5) [micro]m in length, stout, entirely smooth, from extremely bent Gshaped to bean shaped to ring-shaped to button shaped and spiny to smooth oxeas 173.3-258 (219.7 [+ or -] 16.7) [micro]m in length.
Spicules: megascleres are spiny, stout oxeas to strongyles 125-206.7 (173.2 [+ or -] 20.2) nm in length; microscleres are micropseudobirotules 12.9-54.5 (33.2 [+ or -] 7.1) [micro]m in length with rotules composed of hooks 5.1-15 (10.9 [+ or -] 2.1) [micro]m in diameter; gemmuloscleres are strongyles of two sizes: large gemmuloscleres 70.5-139.3 (97.2 [+ or -] 17.3) [micro]m; and small gemmuloscleres 26.4-64.2 (40.9 [+ or -] 7.2) [micro]m in length, straight to slightly curved and covered in spines.
fistula: m (+ + +); lgm (+); sgm (+) M = megasclere; am = alpha megasclere; bm = beta megasclere; mi = microsclere; gm = gemmosclere; lgm = long gemosclere; sgm = short gemmosclere; Abundant = + + +; Few = + +; rare = +.
Fully formed and well preserved megascleres and microscleres (spicules from skeleton) were dominant (Figures 2a and 2b).