Operculum

Operculum - hard structure which closes the aperture of a gastropod when the animal retreats into the shell. Article “Operculum” in German Wikipedia has 16 points for quality (as of July 1, 2026). The article contains 1 references and 6 sections.

This article has the best quality in English Wikipedia. Also, this article is the most popular in that (German) language version.

Since the creation of article “Operculum”, its content was written by 47 registered users of German Wikipedia and edited by 231 registered Wikipedia users in all languages.

The article is cited 247 times in German Wikipedia and cited 4419 times in all languages.

The highest Authors Interest rank from 2001:

• Local (German): #5778 in September 2012
• Global: #47739 in August 2010

The highest popularity rank from 2008:

• Local (German): #71499 in October 2012
• Global: #132468 in August 2010

There are 16 language versions for this article in the WikiRank database (of the considered 55 Wikipedia language editions).

The quality and popularity assessment was based on Wikipédia dumps from July 1, 2026 (including revision history and pageviews for previous years).

The table below shows the language versions of the article with the highest quality.

#	Language	Quality grade	Quality score
1	English (en) Operculum (gastropod)		41.5636
2	Portuguese (pt) Opérculo (gastrópode)		37.2301
3	Catalan (ca) Opercle (gasteròpodes)		28.2798
4	Spanish (es) Opérculo (gasterópodos)		25.3591
5	Galician (gl) Opérculo (gasterópodos)		23.3419
6	Russian (ru) Оперкулум (брюхоногие)		19.8929
7	Dutch (nl) Operculum (mollusken)		18.6382
8	German (de) Operculum		16.0256
9	Chinese (zh) 螺厣		14.5259
10	Bulgarian (bg) Оперкулум (мекотели)		11.8702

More...

The following table shows the most popular language versions of the article.

The most popular language versions of the article "Operculum" in all the time

#	Language	Popularity award	Relative popularity
1	English (en) Operculum (gastropod)		724 060
2	German (de) Operculum		246 622
3	Italian (it) Opercolo		187 051
4	Russian (ru) Оперкулум (брюхоногие)		42 644
5	Spanish (es) Opérculo (gasterópodos)		24 780
6	French (fr) Opercule (mollusque)		21 995
7	Polish (pl) Wieczko (konchiologia)		16 403
8	Czech (cs) Operkulum		16 223
9	Portuguese (pt) Opérculo (gastrópode)		14 854
10	Dutch (nl) Operculum (mollusken)		14 186

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The following table shows the language versions of the article with the highest popularity in the last month.

The most popular language versions of the article "Operculum" in June 2026

#	Language	Popularity award	Relative popularity
1	English (en) Operculum (gastropod)		2 350
2	German (de) Operculum		575
3	Italian (it) Opercolo		316
4	Russian (ru) Оперкулум (брюхоногие)		195
5	Spanish (es) Opérculo (gasterópodos)		149
6	Chinese (zh) 螺厣		139
7	French (fr) Opercule (mollusque)		123
8	Czech (cs) Operkulum		58
9	Catalan (ca) Opercle (gasteròpodes)		47
10	Dutch (nl) Operculum (mollusken)		47

More...

The following table shows the language versions of the article with the highest Authors’ Interest.

Language versions of the article "Operculum" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.

#	Language	AI award	Relative AI
1	English (en) Operculum (gastropod)		59
2	German (de) Operculum		47
3	Italian (it) Opercolo		33
4	Dutch (nl) Operculum (mollusken)		23
5	Russian (ru) Оперкулум (брюхоногие)		17
6	French (fr) Opercule (mollusque)		12
7	Catalan (ca) Opercle (gasteròpodes)		9
8	Czech (cs) Operkulum		9
9	Polish (pl) Wieczko (konchiologia)		5
10	Spanish (es) Opérculo (gasterópodos)		4

More...

The following table shows the language versions of the article with the highest Authors’ Interest in the last month.

Language versions of the article "Operculum" with the highest AI in June 2026

#	Language	AI award	Relative AI
1	Dutch (nl) Operculum (mollusken)		2
2	Bulgarian (bg) Оперкулум (мекотели)		0
3	Catalan (ca) Opercle (gasteròpodes)		0
4	Czech (cs) Operkulum		0
5	German (de) Operculum		0
6	Greek (el) Επιπωμάτιο (γαστερόποδα)		0
7	English (en) Operculum (gastropod)		0
8	Spanish (es) Opérculo (gasterópodos)		0
9	French (fr) Opercule (mollusque)		0
10	Galician (gl) Opérculo (gasterópodos)		0

More...

The following table shows the language versions of the article with the highest number of citations.

Language versions of the article "Operculum" with the highest Citation Index (CI)

#	Language	CI award	Relative CI
1	English (en) Operculum (gastropod)		2 801
2	Italian (it) Opercolo		458
3	German (de) Operculum		247
4	Portuguese (pt) Opérculo (gastrópode)		231
5	Chinese (zh) 螺厣		174
6	Dutch (nl) Operculum (mollusken)		148
7	Spanish (es) Opérculo (gasterópodos)		89
8	French (fr) Opercule (mollusque)		79
9	Russian (ru) Оперкулум (брюхоногие)		68
10	Polish (pl) Wieczko (konchiologia)		62

More...

#	Language	Value
bg	Bulgarian Оперкулум (мекотели)
ca	Catalan Opercle (gasteròpodes)
cs	Czech Operkulum
de	German Operculum
el	Greek Επιπωμάτιο (γαστερόποδα)
en	English Operculum (gastropod)
es	Spanish Opérculo (gasterópodos)
fr	French Opercule (mollusque)
gl	Galician Opérculo (gasterópodos)
it	Italian Opercolo
lt	Lithuanian Operkulas
nl	Dutch Operculum (mollusken)
pl	Polish Wieczko (konchiologia)
pt	Portuguese Opérculo (gastrópode)
ru	Russian Оперкулум (брюхоногие)
zh	Chinese 螺厣

Best Rank

German: #71499 10.2012

Global: #132468 08.2010

Best Rank

German: #5778 09.2012

Global: #47739 08.2010

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In German Wikipedia the most popular articles on that day were: Demokratische Republik Kongo, Fußball-Weltmeisterschaft 2026, Senegal, Julian Nagelsmann, Erling Haaland, Sadio Mané, Fußball-Weltmeisterschaft 1994, Jürgen Klopp, Fußball-Europameisterschaft 2028, Fußball-Weltmeisterschaft.

The WikiRank project is intended for automatic relative evaluation of the articles in the various language versions of Wikipedia. At the moment the service allows to compare over 50 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2026. When calculating current popularity and AI of articles data from June 2026 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2026... More information