antapex


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antapex

(ant -ay-peks) (solar antapex) See apex.
References in periodicals archive ?
R3 is the longest and the thickest, almost straight or slightly curved backward, almost reaching the level of the antapex. LSL is wide, often finely reticulate, RSL terminates at R3.
R3 is the thickest and the longest, curved backward at its distal part, directed laterally-posteriorly in general, about 1.8 times longer than R2, almost reaching the level of the antapex. Lb 67.5 [micron]m, Lt 70 [micron]m, Db 41.5 [micron]m, Dt 56.5 [micron]m; n=1.
LSL is long, terminating in about 3/4 the cell length, located closer to the antapex, with a rounded posterior margin and no list behind R3.
Hypotheca is cuneate in its posterior portion, with a markedly attenuated antapex tilted toward the ventral part of the cell, dorsally convex, narrowly rounded at the antapex, and strongly concave between the antapex and LSL.
Hypotheca is cuneate in its posterior portion, dorsally convex, narrowly rounded at the antapex, and slightly concave between the antapex and LSL.
Cells are small, suboval, markedly asymmetrical in relation to the longitudinal axis of the cell, with a convex dorsal side and a compressed ventral side, with a rather high, broadly rounded epitheca and narrower rounded antapex. Epitheca is about one-quarter (0.22-0.25) of the cell length.
The sulcus does not penetrate into the epitheca and does not reach the antapex (Fig.
Hypotheca is slightly longer in its left part, sometimes bearing a small spine at the antapex. Length 17.5-37 [micro]m (24.9 [+ or -] ]6.0 [micro]m), width 37.5-66.3[micro]m (48.1 [+ or -] ]9.0 [micro]m), height 33.8-55 [micro]m (41.4 [+ or -] ]6.2 [micro]m); n=14.
Hypotheca is half the length of the epitheca, slightly depressed at the antapex, with two long, very divergent, thin spines, and two prominent sulcal lists (the left one being more prominent).