spinule


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spinule

(spīn′yo͞ol)
n.
A small spine or thorn.
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References in periodicals archive ?
Cerci rather stout at base but gradually narrowed and little curved towards subparallel-sided, nearly cylindrical posterior area, towards apex more strongly curved, in apical area strongly setose and at tip provided with a small acute spinule (Figs 1G, 2F).
It was somewhat difficult to distinguish the anterior and posterior ends of the roundish dermal tubercles in the fourhorn sculpin, but the length/height and direction of spinules helped to orient the tubercles because longer spinules were positioned posteriorly and directed posteriorly.
Endopod 2-segmented; first segment shorter than second, with 1 inner seta; second segment with outer row of long spinules, 1 proximal seta, 1 spine and 1 seta subdistally along inner margin, and 7 apical elements, 4 of them geniculate.
cerci of male reaching apex of sub-genital plate, slightly curved, conical basally, in apical part narrowed, bent slightly inward, apex abruptly pointed, width very small pointed spinule.
Both processes are slightly swollen in the middle, bearing a subterminal spinule at elbow and terminated with three spinules, positioned on slightly widened tips.
Anal operculum rounded, with 10 spinules. Caudal rami short and wide, as long as the last abdominal somite.
Microstructure of scale surfaces revealed structures common to all the species investigated, such as spinules and pits, but the way in which these structures were disposed provided microstructural models that expressed particularities of scale microanatomy for each species studied.
In the genitalia, the ostium bursae (ob) has very short spinules and is not modified, lacking a protruded lamella antevaginalis.