pygidium การใช้

• In some species the pygidium is outlined with a flat border.
• Its pygidium is small, with no cirri and numerous papillae.
• The pintail ( pygidium ) is of no significance for the jump.
• The pygidium is small ( micropygous ), with an even margin.
• The pygidium is rather large, and often rather effaced.
• Its pygidium has a terminal anus and two pygidial cirri.
• The tailshield ( or pygidium ) is well segmented.
• The tailshield ( or pygidium ) is weakly furrowed.
• The thorax has ten narrow segments The pygidium completely lacks any visible trilobation.
• The thorax is usually much longer than the pygidium, which is usually small.
• The pygidium ends in a striking tail spike.
• Both the cephalon and the pygidium lack spines.
• It is the highest point of the pygidium.
• The pygidium ends in downward pointing toothlike spines.
• Its headshield ( or pygidium ) consists of four rings and a minute endpiece.
• Its pygidium is small, with 2 anal cirri, similar to its dorsal cirri.
• "Pygidium " is also a superseded genus of fish of the family Trichomycteridae.
• Along the margins of the pygidium are a pair of very small backward-pointing spines.
• Like all Raphiophorids it is blind, with a headshield ( or pygidium are strongly segmented.
• It is named for the spines on the pygidium, which give it a serrated impression.