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periproct

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Periproct - Wikipedia
The periproct is the final body segment in annelid worms. The anus is located on this segment. The term also refers to the small region surrounding the anus ... en.wikipedia.org
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PERIPROCT Definition & Meaning - Merriam-Webster
The meaning of PERIPROCT is the well-defined area surrounding the anus of various invertebrates (as a sea urchin). www.merriam-webster.com
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Echinoids - Sea Urchins - Cronodon
The periproct is on the aboral surface of the narrowed end. The ... The central aboral apex is surrounded by 5 petaloids. The peristome is in the ... cronodon.com
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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 Definition & Meaning - Dictionary.com
Periproct definition: (in certain echinoids) that part of the body surface bordering the anus.. See examples of PERIPROCT used in a sentence. www.dictionary.com
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PERIPROCT definition in American English - Collins Dictionary
Zoology a tough membranous area surrounding the anus in echinoderms and certain other invertebrates.... Click for pronunciations, examples sentences, video. www.collinsdictionary.com
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Periproct - Oxford Reference
In Echinodermata, the area that surrounds the anus. It is covered in tough skin in which small, calcitic plates are loosely embedded. From: periproct in A ... www.oxfordreference.com
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periproct - Wiktionary, the free dictionary
periproct (plural periprocts). (zoology) The region surrounding the anus, particularly in echinoderms. Related terms. en.wiktionary.org
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Peristome and periproct. A , Cassidulus (cassiduloid), apical view. B
The relationships of post-Palaeozoic echinoids at family level are established through phylogenetic analysis of 169 taxa and 306 skeletal characters. www.researchgate.net
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RETRODISPLACEMENT OF THE ORAL AND ANAL OPENINGS IN ...
In regular echinoids, the mouth opening (or peristome) and the anal opening (or periproct) are located centrally. In irregular echinoids, the peristome ... pubmed.ncbi.nlm.nih.gov
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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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