echinate


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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.
We have also observed remains of flower in the powder, such as spherical, echinate pollen grains (Figures 7 and 8).
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.
Exine Mutisia type, echinate, 8-11 [micro]m thick, spines of 2-2.
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.
In the following discussion, echinate means having surface spines of at least 1 [micro]m in height, regardless of whether there are surface ridges or not; the alternative, psilate, means without surface spines of at least 1 [micro]m in height (a distinction traditionally applied because such grains appear effectively smooth under LM).
element of their perispore sculpture into three main patterns: echinate,
Pollen with supratectal spines often has echinate orbicules (type I)--e.