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periproct

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periproct
periproct Zool. (ˈpɛrɪprɒkt) [f. Gr. περί around + πρωκτ-ός the anus.] That part of the perisome or body-wall of an echinoderm which surrounds the anus: opp. to peristome.1877 Huxley Anat. Inv. Anim. ix. 569 In Echinus, the apical extremities of the ambulacra abut upon the five smaller of the ten si... Oxford English Dictionary
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Periproct
The periproct is the final body segment in annelid worms. The anus is located on this segment. wikipedia.org
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Heterocentrotus
consists of sea urchins with rounded (but slightly elliptical) test, with the peristome (mouth) located in the center of the oral surface (lower) and the periproct The apical disc is dicyclic, with a reduced periproct. The peristome is also reduced and elliptical, with limited mouth notches. wikipedia.org
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peristome
peristome (ˈpɛrɪstəʊm) Also in L. forms peˈristoma (pl. -ata), periˈstomium (pl. -ia). [= F. péristome (18..), ad. mod.L. peristoma (Hedwig 1782), f. Gr. περί around + στόµα mouth; altered (by Ehrhart 1787) to peristomium, after pericarpium, etc.] 1. Bot. The fringe of small teeth around the mouth o... Oxford English Dictionary
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Holasteroida
The anus (periproct) has migrated towards the periphery of the test. The plastron is never amphisternous. wikipedia.org
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规则海胆亚纲 - 百度百科
规则海胆亚纲（学名： Endocyclica）：胆壳呈球形，五辐对称，每二列步带板与二列间步带板相间排列，具亚里斯多德提灯。 胆壳的直径多数在6～12cm之间，但有的种小于1cm，也有的种大于36cm。 体表多呈灰褐色、黑色、深紫色、绿色和白色等不同颜色。 中文名 规则海胆亚纲 所属分类 棘皮动物门 > 游移亚门 > 海胆纲 形态特征 胆壳呈球形，五辐对称 大 小 胆壳的直径多数在6～12cm之间 目录 1 分类地位 2 形态特征 分类地位 编辑 动物界 ＞ 棘皮动物门 ＞ 游移亚门 ＞ 海胆纲＞ 规则海胆亚纲 Endocyclica 形态特征 编辑 身体的口面向下、平坦，中央有口，反口面向上隆起，呈半球形，顶端中央有肛门及围肛区（periproct region）。
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Ctenocystoidea
The anus of ctenocystoids was surrounded by a pyramidal periproct as in other echinoderms. wikipedia.org
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Phymosomatoida
The opening in the test through which the anus passes, known as the periproct, is unusually large in sea urchins from this group. wikipedia.org
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Echinometra oblonga
Their eggs are either held on the peristome or around the periproct. wikipedia.org
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Echinocyamidae
Description They are Laganiformes with: simple radial internal buttresses along interambulacral margins; periproct close to peristome and opening bounded wikipedia.org
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Clitellata
They also lack parapodia and appendages on the prostomium, the body and the periproct (terminal segment on which the anus is located). wikipedia.org
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Diadema savignyi
Diadema savignyi can be distinguished by the fact that it has iridescent green or blue lines in the interambulacral areas and around the periproct, a cone-shaped Another distinguishing feature is that D. savignyi does not have a thin orange ring round the periproct whereas D. setosum does. wikipedia.org
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Cincta
It was surrounded by a cone of plates equivalent to the periproct of modern echinoderms. wikipedia.org
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Toxopneustes pileolus
Like the mouth, it is surrounded by a ring of small plates known as the periproct. wikipedia.org
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Annelid
of" and στομα meaning "mouth") contains the brain and sense organs, while the rearmost, called the pygidium (Greek πυγιδιον, meaning "little tail") or periproct wikipedia.org
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