pulsatoria include antennae about as long as the palps, a smooth anterior peristomial
margin which is not projected, and homogomph falcigers with short, slightly denticulated blades.
1 mm), considering peristomial
length for limpets and diameter without spines for sea-urchins.
Sea urchins were cut outside the peristomial
Descriptions of this species, prostomium elongate are rounded anteriorly, flanked laterally by peristomial
ridges leading to ventral mouth.
region twice as large as region of periproct.
Avian predators break open the dorsal or ventral surface of the test, or rupture the peristomial
membrane and remove Aristotle's lantern (Hendler, 1977; this report).
the transverse mouth is located midventrally between the two peristomial
2004), our study shows N-termVcCentrin4-antibody labels the Vorticella myonemal system composed of longitudinal fibers running from the base of the peristomial
disc/lip of the cell body to the junction between the scopular lip and the stalk (Fig.
Tags were implanted into the body cavity of the sea urchins through the peristomial
Here apical eccentricity refers to the displacement of the apical system on the aboral surface, whereas peristomial
eccentricity refers to the displacement of the peristome on the oral surface.
This was done by injecting tetracycline hydrochloride (1 mg/100 mL seawater) through the peristomial
Diagnosis: The antennae and peristomial
cirri are short and the aciculae are black, as are the bidentate subacicular hooks.