How To Use Peristome In A Sentence
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The species is widely umbilicated, and the peristome is usually dark-coloured.
The Journals of John McDouall Stuart
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Upon the left edge of the peristome is a high, undulating membrane, sail-like in appearance when extended.
Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901
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The anterior cirri appear to line the upper left border of the peristome, which is marked by a row of large cilia.
Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901
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C, Median longitudinal section of a capsule, with the seta gradually widening into the apophysis at its base; d, operculum; p, peristome; a, annulus; c, columella; s, archesporium; h, air-space between the spore-sac and the wall of the capsule.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria"
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Ammonites are complete, many with preserved peristomes.
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The peristome is a small groove leading from the anterior end to the mouth about midway down the ventral side of the body.
Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901
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That is, these mosses have peristome teeth which are formed by walls growing between the rows of cells making up the mouth of the spore capsule.
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Spines and tube feet surrounding the peristome function in locomotion, burrowing, and food-gathering.
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This zone is composed mainly of the peristome, which produces copious amounts of nectar, luring insect prey to land or crawl onto the perilous footing surrounding the pitcher trap.
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The species is widely umbilicated, and the peristome is usually dark-coloured.
The Journals of John McDouall Stuart
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The diameter of the peristome is a little larger than the length of the body.
Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901
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Only the final peristomeal differentiations, with fragile lappets, may disappear during fossilization.
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The peristome teeth operate hygroscopically to move the diaphragm up into the wind.
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The right edge of the peristome is lamellate and bears a clearly defined undulating membrane.
Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901
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The collar (called the peristome by Cohn) is evidently formed, like the valve, by an inward projection of the walls of the bladder.
Insectivorous Plants
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Other mature modifications, such as change in the shape of the peristome, are also inconsistently observed in Paleozoic ammonoids.
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[GONIOCLYPEUS SUBANGULATUS] somewhat pentangular; posterior or anal orifice lateral, or upon the superior face; interambulacral area grooved, with the continued area beneath projecting; interambulacral areas sub-angulated; mouth rather narrow or small, central; peristome angular, and surrounded by five angular prominences, which terminate in the interambulacral areas, between which is a rosette, perforated by seven pairs of pores, with three odd ones at the end of each petal; ambulacra petaloid and closed; the prolonged zone provided with alternating pores as far as the base; pores connected by oblique grooves; interambulacral wide; plates large, and nine or ten in a column.
Report of the North-Carolina Geological Survey. Agriculture of the Eastern Counties: Together with Descriptions of the Fossils of the Marl Beds
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Many derived mosses have yet another control on spore dispersal: a peristome with peristome teeth arranged around an annulus.
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(Physcomitrium), immense splashes of what seemed to be the scarlet-crested Cladonia, traceries of huge moss veils, crushings of teeth (peristome) gigantic; spore cases brown and white, saffron and ivory, hot vermilions and cerulean blues, pressed into an astounding mosaic by some titanic force.
The Moon Pool
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The chief characteristic is the peristome, which is not a furrow, but a broad triangular area deeply insunk and ending in
Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901
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Diagnostic characters: The peristome is a narrow furrow which begins, as a rule, close to the anterior end and runs backward along the ventral side, to the mouth, which is usually placed between the middle of the body and the posterior end.
Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901
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The peristome is short and stretches around the front end of the animal.
Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901
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The autozooids have small apertures and often preserve long peristomes inclined at an acute angle to the colony surface.
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[GONIOCLYPEUS SUBANGULATUS] somewhat pentangular; posterior or anal orifice lateral, or upon the superior face; interambulacral area grooved, with the continued area beneath projecting; interambulacral areas sub-angulated; mouth rather narrow or small, central; peristome angular, and surrounded by five angular prominences, which terminate in the interambulacral areas, between which is a rosette, perforated by seven pairs of pores, with three odd ones at the end of each petal; ambulacra petaloid and closed; the prolonged zone provided with alternating pores as far as the base; pores connected by oblique grooves; interambulacral wide; plates large, and nine or ten in a column.
Report of the North-Carolina Geological Survey. Agriculture of the Eastern Counties: Together with Descriptions of the Fossils of the Marl Beds
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The peristome can seem quite large.
