Armenoceratidae

Armenoceratidae
Temporal range: M Ordovician - Silurian
Part of the isolated siphuncle of an armenoceratid nautiloid cephalopod
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Nautiloidea
Order: †Actinocerida
Family: †Armenoceratidae
Troedsson (1926)
Genera

See text

The Armenoceratidae are a family of early Paleozoic nautiloid cephalopods belonging to the order Actinocerida.[1] [2]

The Armenoceratidae, established by Troedsson (1926) [2] are characterized by large, straight, or slightly curved shells and large siphuncles with strongly expanded segments between the septa. Septal necks are short and abruptly recurved along brims. Radial canals in the endosiphuncular canal system are typically arched, curving forward and backward from near the septal foramina (openings) to connect with the parispatium on either side of the middle of each segments.[2] The parispatium is the narrow opening between the inner side of the connecting rings in actinocerids and the internal siphuncular deposits that grow forward and back from the region of the septal openings.

The Armenoceratidae have their beginning in Armenoceras which first appeared near the beginning of the Chazyan, 2nd stage of the Middle Ordovician in older established chronologies, in northeastern China, Manchuria,[1][3] derived from Wutinoceras. Additional genera include Nybyoceras and Selkirkoceras, respectively, from the upper Middle and Upper Ordovician, and Monocyrtoceras, Elrodoceras, and Megadiscoceras from the Silurian,[2]

The Armenoceratidae, Armenoceras, Nybyoceras, and Selkirkoceras, first appear in North America in the diverse cephalopod Redriveran faunas of the early Upper Ordovician[1][3] but are no longer found during that stage in Asia. Selkirkoceras is a large armenocerid from the Upper Ordovician with a blunt, flattened, somewhat breviconic shell.

Among the Silurian genera, Elrodoceras has a large shell with the apical part slightly curved, otherwise is straight, and a siphuncle that is narrower than in Armenoceras. Monocyrtoceras has a siphuncle like that of Elrodoceras, but the entire shell is gently and evenly curved. Megadiscosorus is similar to Armenoceras, but more breviconic and slightly exogastrically cyrtoconic and with the siphuncle in contact with the ventral wall.

The Armenoceratidae most likely gave rise through Armenoceras to Gonioceras in the Chazyan, and later in the Middle Ordovician, possibly through either an early Armenoceras or Nybyoceras to Actinoceras

References

  1. ^ a b c Flower 1957.Studies of the Actinoceratida.; Memoir 2; New Mexico Bureau of Mines and Mineral Resources, Socorro, NM
  2. ^ a b c d Teichert 1964. Actinoceratoidea, Treatise on Invertebrate Paleontology, part K.(Nautiloidea)
  3. ^ a b Flower 1976 Ordovician Cephalopod Faunas and Their Role in Correlation. in Basset M. C. (ed) The Ordovician System. Palaeonological Association.

Read other articles:

San Diego

Disambiguazione – Se stai cercando altri significati, vedi San Diego (disambigua). Questa voce o sezione sull'argomento centri abitati della California non cita le fonti necessarie o quelle presenti sono insufficienti. Puoi migliorare questa voce aggiungendo citazioni da fonti attendibili secondo le linee guida sull'uso delle fonti. Segui i suggerimenti del progetto di riferimento. San Diegocomune(EN) City of San Diego (dettagli) San Diego – Veduta LocalizzazioneStato Stati Uni...

 

List of hospitals in Mexico

There are 4,466 hospitals in Mexico. 67% of hospitals are private and the remaining 33% are public. The most important public hospital institutions are the Secretariat of Health (Secretaria de Salud), Mexican Social Security Institute (IMSS) and Institute for Social Security and Services for State Workers (ISSSTE). These form an integral part of the Mexican healthcare system. This is a list of hospitals in Mexico. This list is incomplete; you can help by adding missing items. (August 2008) M...

 

Merton Miller

Merton Miller Merton Howard Miller (Boston, Massachusetts, 16 Mei 1923 – 3 Juni 2000) adalah ekonom Amerika Serikat yang pernah bekerja sebagai ekonom dalam divisi penelitian pajak di Departemen Perbendaharaan selama PD II, dan menerima Ph.D. dalam ilmu ekonomi dari Johns Hopkins University, 1952. Pada 1958, ia berkolaborasi dengan Franco Modigliani untuk menulis The Cost of Capital, Corporate Finance and the Theory of Investment. Karya ini mendorong penolakan fundamental pada pandangan tra...

Iliyan Ivanov

Bulgarian American psychiatrist In this Bulgarian name, the patronymic is Stoyanov and the family name is Ivanov. Iliyan IvanovBorn (1963-07-18) 18 July 1963 (age 60)Burgas, BulgariaNationalityBulgarian AmericanEducationMedical University of VarnaYears active1996 - currentlyMedical careerProfessionPsychiatristFieldChild and adolescent psychiatryInstitutionsMount Sinai MorningsideAwardsHonorary citizen of Burgas Websitehttps://iliyanivanovmd.com/ Iliyan Stoyanov Ivanov is a Bulga...

 

User talk:KrytenKoro

Retired This user is no longer active on Wikipedia. Lycosa coelestis listed at Redirects for discussion An editor has asked for a discussion to address the redirect Lycosa coelestis. Since you had some involvement with the Lycosa coelestis redirect, you might want to participate in the redirect discussion (if you have not already done so). Chris Cunningham (user:thumperward) (talk) 12:16, 23 September 2012 (UTC)[reply] This title has not been started as an article, and right now if you type i...

 

Nieuwegein

Nieuwegein, adalah sebuah gemeente Belanda yang terletak di provinsi Utrecht. Pada tahun 2023 daerah ini memiliki penduduk sebesar 65.426 jiwa. Lihat pula Daftar munisipalitas Belanda lbsMunisipalitas di provinsi Utrecht Amersfoort Baarn Bunnik Bunschoten De Bilt De Ronde Venen Eemnes Houten IJsselstein Leusden Lopik Montfoort Nieuwegein Oudewater Renswoude Rhenen Soest Stichtse Vecht Utrecht Utrechtse Heuvelrug Veenendaal Vijfheerenlanden Wijk bij Duurstede Woerden Woudenberg Zeist Artikel ...

Kotahena

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: Kotahena – news · newspapers · books · scholar · JSTOR (March 2024) (Learn how and when to remove this template message) Suburb in Western Province, Sri LankaKotahena කොටහේන (Koṭahēna)கொட்டாஞ்சேனை (Koṭṭāñcēṉai)Sub...

 

Wabah Besar Marseille

Marseille ketika Wabah Besar Wabah Besar Marseille merupakan salah satu wabah bubonik terakhir yang signifikan di Eropa. Wabah ini datang ke Marseille, Prancis pada tahun 1720, dan membunuh 100.000 orang di dalam kota dan sekitarnya.[1] Bagaimanapun, Marseille dapat pulih dengan cepat dari wabah tersebut.Aktivitas perekonomian hanya membutuhkan beberapa tahun untuk kembali seperti semula, terutama ketika perdagangan telah berkembang menuju Hindia Barat dan Amerika Latin. Pada tahun 17...

 

Adolfo, duca di Cambridge

Adolfo di HannoverAdolfo ritratto da William BeecheyDuca di CambridgeStemma In carica17 novembre 1801 –8 luglio 1850 Predecessoretitolo creato SuccessoreGiorgio, duca di Cambridge Nome completoAdolphus Frederick TrattamentoSua Altezza Reale Altri titoliConte di TipperaryBarone Culloden NascitaBuckingham Palace, Londra, 24 febbraio 1774 MorteCambridge House, Piccadilly, Westminster, Londra, 8 luglio 1850 (76 anni) Luogo di sepolturaChiesa di Sant'Anna, Kew (fino al 1930)Cappe...

Bell V-247 Vigilant

Unmanned military tiltrotor concept V-247 Vigilant Role Tiltrotor multirole UAVType of aircraft National origin United States Manufacturer Bell Helicopter Status Concept The Bell V-247 Vigilant is a concept by Bell Helicopter to develop a large tiltrotor unmanned aerial vehicle. Development Bell created the V-247 to meet emerging U.S. military needs for a runway-independent Group 4 or 5 UAV to provide persistent support to ground forces while requiring less space to store and transport; Group...

 

Азиатский барсук

Азиатский барсук Научная классификация Домен:ЭукариотыЦарство:ЖивотныеПодцарство:ЭуметазоиБез ранга:Двусторонне-симметричныеБез ранга:ВторичноротыеТип:ХордовыеПодтип:ПозвоночныеИнфратип:ЧелюстноротыеНадкласс:ЧетвероногиеКлада:АмниотыКлада:СинапсидыКласс:Мле�...

 

格奥尔基·马林科夫

格奥尔基·马林科夫Гео́ргий Маленко́в苏联共产党中央书记处书记（排名第一）任期1953年3月5日—1953年3月13日前任约瑟夫·斯大林继任尼基塔·赫鲁晓夫（第一书记）苏联部长会议主席任期1953年3月5日—1955年2月8日前任约瑟夫·斯大林继任尼古拉·布尔加宁 个人资料出生1902年1月8日［儒略曆1901年12月26日］ 俄罗斯帝国奥伦堡逝世1988年1月14日(1988歲—01—14)（86歲）&#...

VeggieTales in the City

2017 American television series This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages) This article may need to be rewritten to comply with Wikipedia's quality standards. You can help. The talk page may contain suggestions. (September 2023) This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be...

 

غلوريا سوانسون

غلوريا سوانسون (بالإنجليزية: Gloria Swanson)‏   ، و    معلومات شخصية اسم الولادة غلوريا ماي جوزفين سوانسون الميلاد 27 مارس 1899 [1][2][3][4]  شيكاغو  الوفاة 4 أبريل 1983 (84 سنة)مستشفى نيويورك[5]  سبب الوفاة مرض قلبي وعائي  مواطنة الولايات المتحدة  ال...

 

Ground squirrel

Type of ground-dwelling rodent Ground squirrelTemporal range: Early Oligocene to recent Ground squirrel in Turkey Scientific classification Domain: Eukaryota Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Rodentia Family: Sciuridae Subfamily: Xerinae Tribe: MarmotiniPocock, 1923 Genera Palaeosciurus (fossil) Sciurotamias Spermophilinus (fossil) Ammospermophilus Spermophilus Notocitellus Otospermophilus Callospermophilus Xerospermophilus Cynomys Poliocitellus Ictidomys Arctomyoides ...

Frederick F. Henry

Frederick Funston HenryLahir(1919-09-23)23 September 1919Vian, OklahomaMeninggal1 September 1950(1950-09-01) (umur 30)Naktong Bulge, dekat Andong, KoreaTempat pemakamanNational Memorial Cemetery of the PacificPengabdianAmerika SerikatDinas/cabangAngkatan Darat Amerika SerikatLama dinas1940 - 1950PangkatLetnan SatuKesatuanResimen Infanteri ke-38, Divisi Infanteri ke-2Perang/pertempuranPerang Dunia II Perang Korea Pertempuran Perimeter Pusan Pertempuran Naktong Bulge Kedua † Pe...

 

県立地球防衛軍

県立地球防衛軍 ジャンル ギャグ漫画 漫画 作者 安永航一郎 出版社 小学館 掲載誌 週刊少年サンデー増刊号 レーベル 少年サンデーコミックス 発表号 1983年5月号 - 1985年9月号 発表期間 1983年3月25日 - 1985年7月25日 巻数 全4巻 テンプレート - ノート 『県立地球防衛軍』（けんりつちきゅうぼうえいぐん）は、安永航一郎による日本の漫画作品、およびこれを原作としたOVA�...

 

Yahya Petra dari Kelantan

Biografi ini tidak memiliki referensi atau sumber sehingga isinya tidak dapat dipastikan. Bantu memperbaiki artikel ini dengan menambahkan sumber tepercaya. Materi kontroversial atau trivial yang sumbernya tidak memadai atau tidak bisa dipercaya harus segera dihapus.Cari sumber: Yahya Petra dari Kelantan – berita · surat kabar · buku · cendekiawan · JSTOR (Pelajari cara dan kapan saatnya untuk menghapus pesan templat ini) Yahya PetraYang di-Pertuan Ago...

Hum (film)

HumPoster rilis teatrikalSutradaraMukul S. AnandProduserRomesh SharmaSkenarioRavi KapoorMohan KaulCeritaRavi KapoorMohan KaulPemeranAmitabh BachchanRajinikanthGovindaKimi KatkarDeepa SahiShilpa ShirodkarDanny DenzongpaAnupam KherKader KhanPenata musikLaxmikant-PyarelalSinematograferW. B. RaoPenyuntingKuldeep MehanK. Ravi KumarDistributorDharma ProductionsTanggal rilis 23 Januari 1991 (1991-01-23) Durasi171 menitNegaraIndiaBahasaHindi Hum (Hindi: हम, Indonesia: Kami) adalah sebu...

 

أبولو كورزينيويسكي

هذه المقالة يتيمة إذ تصل إليها مقالات أخرى قليلة جدًا. فضلًا، ساعد بإضافة وصلة إليها في مقالات متعلقة بها. (مارس 2018) أبولو كورزينيويسكي   معلومات شخصية الميلاد 21 فبراير 1820 [1]  الوفاة 23 مايو 1869 (49 سنة) [1]  كراكوف  مكان الدفن مقبرة راكوفيسكي  مواطنة بولندا ال...