echinate


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

echinate

[ə′kī‚nāt]
(zoology)
Having a dense covering of spines or bristles.
References in periodicals archive ?
The Oberhautchen cells of the microdermatoglyphic transition zone (MTZ) were imbricate and brachylamellate, with echinate apical borders characterized by small (1-2 [micro]m long) spike-like denticles (fimbriae) that lacked pores (Figs.
Pollen grain morphology Pollen grains are compositous, that is, echinate and tectate about 30 [micro]m in diameter, with a coarsely spiny exine and 3 pores; spines are more than 1 [micro]m (Figure 3).
We have also observed remains of flower in the powder, such as spherical, echinate pollen grains (Figures 7 and 8).
Species of Sicyos are characterized by the presence of pollen grains with a polar mean diameter of 50.6 [micro] and an equatorial diameter of 61.3 [micro], an oblate-spheroidal shape, invariably P/E = 0.88 (Table 2), 8-12 colpate with an echinate exine supra and microreticulate (Figs.
Cotton has large echinate pollen grains with long spikes that are covered in a "viscid" material.
Palynological studies revealed the presence of apolar, pantoporate and echinate pollen.
The pollen of Mutisieae and Stifftieae is microechinate, echinate, or almost psilate in some members of Mutisieae; the exine is distinctly bilayered but commonly with a compact ectosexine constituted by columellae very thickly disposed and an endosexine with columellae clearly distinguishable, stout and ramified (Hansen, 1991b; Telleria et al., 2003; Telleria & Katinas, 2004; Zao et al., 2006) (see 80C of Figs.
quinquelobata (Vell.) Cogn., differing by the almost smooth fruit (echinate in C.
Exine Mutisia type, echinate, 8-11 [micro]m thick, spines of 2-2.5 [micro]m length.
Pollen prolate, large size, tricolporate, exine Wunderlichia type, echinate.
Pollen with exine structure heterogeneous, most genera with compact ectosexine constituted by very densely arranged columellae, and endosexine with stout, ramified columellae; exine surface perforate, microechinate to echinate.
This group of species constitute the genus Cloiselia (Ortiz, 2006a), characterized by corollas much longer than the involucre, disc floret epidermal cell cuticle ornamentation "intestine-like," long simple (not twin) hairs on disc florets corolla, stamen insertion near the corolla base, and pollen echinate, among other characters.