قائمة أجناس الذراعيات الأرجل
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|  Aalenirhynchia  Aberia  Aboriginella  Abrekia  Absenticosta  Abyssorhynchia  Abyssothyris  Acambona  Acanthalosia  Acanthambonia  Acanthatia  Acanthobasiliola  Acanthocosta  Acanthocrania  Acanthoglypha  Acanthoplecta  Acanthoproductus  Acanthorhynchia  Acanthorthis  Acanthospirifer  Acanthospirina  Acanthothyris  Acanthothyropsis  Acanthotoechia  Acareorthis  Acculina  Achunoproductus  Acidotocarena  Acolosia  Acosarina  Acritosia  Acrobelesia  Acrobrochus  Acrospirifer  Acrothele  Acrothyra  Acrothyris  Acrotreta  Acrotretella  Actinoconchus  Actinomena  Acuminothyris  Acutatheca  Acutella  Acutilineolus  Acutoria  Adairia  Adaptatrypa  Adectorhynchus  Adenus  Adiaphragma  Adminiculoria  Admixtella  Admodorugosus  Adnatida  Adolfia  Adolfispirifer  Adrenia  Advenina  Adygella  Adygelloides  Adygellopsis  Aegiria  Aegironites  Aemula  Aenigmastricklandia  Aenigmastrophia  Aenigmathyris  Aequispiriferina  Aerithyris  Aerothyris  Aesopomum  Aetheia  Aethirhynchia  Afghanospirifer  Afilasma  Agarhyncha  |  Agastapleura  Agelesia  Agerinella  Agramatia  Agulhasia  Agyrekia  Ahtiella  Aidynkulirhynchia  Airtonia  Ajukuzella  Akatchania  Akelina  Akopovorhynchia  Aktassia  Alabusherothyris  Alaskospira  Alatiformia  Alatoproductus  Alatorthotetina  Aldaniopirifer  Aldanotreta  Aldingia  Alekseevaella  Alexenia  Alichovia  Aliconchidium  Alimbella  Alipunctifera  Aliquantula  Alisina  Alispira  Alispirifer  Alispiriferella  Alitaria  Alithyris  Allanella  Allanetes  Allorhynchoides  Allorhynchus  Almerarhynchia  Almorhynchia  Altaeorthis  Altaestrophia  Altaethyrella  Altajella  Altiplecus  Altoplicatella  Altunella  Alvarezites  Alwynia  Ambardella  Ambikella  Ambocoelia  Amboglossa  Ambonorthella  Ambothyris  Amerista  Amesopleura  Ametoria  Amictocracens  Amissopecten  Amoenirhynchia  Amoenospirifer  Amosina  Amphiclina  Amphiclinodonta  Amphigenia  Amphipella  Amphiplecia  Amphistrophia  Amphistrophiella  Amphithyris  Amphitomella  Amsdenella  Amsdenina  Amsdenostropiella  Amurothyris  |  Amydroptychus  Amygdalocosta  Anabaia  Anabaria  Anabolotreta  Anadyrella  Anakinetica  Anaptychius  Anarhynchia  Anastrophia  Anathyrella  Anathyris  Anatreta  Anatrypa  Anazyga  Anchigonites  Ancillotoechia  Ancistrocrania  Ancistrorhynchia  Ancorellina  Ancorhynchia  Ancylostrophia  Andalucinetes  Andobolus  Andreaspira  Aneboconcha  Anechophragma  Anelotreta  Anemonaria  Angarella  Angiospirifer  Angulotreta  Angusticardinia  Angustothyris  Aniabrochus  Anidanthus  Animonithyris  Anisactinella  Anisopleurella  Annuloplatidia  Anomactinella  Anomalesia  Anomaloglossa  Anomaloria  Anomalorthis  Anoplia  Anopliopsis  Anoplotheca  Anoptambonites  Ansehia  Antelocoelia  Anteridocus  Antezeilleria  Anthracospirifer  Antigonambonites  Antigoniarcula  Antinomia  Antiptychina  Antiquatonia  Antirhynchonella  Antispirifer  Antistrix  Antistrixia  Antizygospira  Antronaria  Anulatrypa  Anx  Aorhynchia  Aparimarhynchia  Apatecosia  Apatobolus  Apatomorpha  Apatorthis  Apatoskenidioides  Aperispirifer  Apertirhynchella  Aphanomena  |  Aphaurosia  Apheathyris  Aphelesia  Aphelotreta  Apheoorthina  Apheoorthis  Aphragmus  Apicilirella  Apletosia  Apodosia  Apollonorthis  Apomatella  Apopentamerus  Aporthophyla  Aporthophylina  Apothyris  Apousiella  Apringia  Apsilingula  Apsocalymma  Apsotreta  Arabatia  Arabicella  Araksalosia  Araneatrypa  Arapsopleurum  Araspirifer  Aratanea  Aratella  Aratoechia  Araxathyris  Araxilevis  Arbizustrophia  Arcelinithyris  Arceythyris  Archaeorthis  Archaiosteges  Archeochonetes  Arcosarina  Arcticalosia  Arctireta  Arctispira  Arctochonetes  Arctohedra  Arctomeristina  Arctosia  Arctothyris  Arcualla  Arcuatothyris  Arcullina  Ardiviscus  Ardmosteges  Arduspirifer  Areella  Arenaciarcula  Arenorthis  Areostrophia  Argella  Argentiproductus  Argorhynx  Argovithyris  Argyrotheca  Arionthia  Arktikina  Aromasithyris  Articalosia  Artimyctella  Artiotreta  Artospirifer  Aseptagypa  Aseptalium  Aseptella  Aseptirhynchia  Aseptonetes  Asiarhynchia  Asioproductus  Askepasma  |  Asperlinus  Aspidothyris  Aspinosella  Astaristrophia  Astegosia  Astraborthis  Astua  Asturorthis  Astutorhyncha  Asymmetrochonetes  Asymphylotoechia  Asyrinx  Asyrinxia  Atactosia  Atelelasma  Atelelasmoidea  Atelestegastus  Atelithyris  Athabaschia  Athyrhynchus  Athyris  Athyrisina  Athyrisinoides  Athyrisinopsis  Athyrorhynchia  Atlanticocoelia  Atlantida  Atribonium  Atrypa  Atryparia  Atrypella  Atrypellina  Atrypina  Atrypinella  Atrypinopsis  Atrypoidea  Atrypopsis  Atrypunculus  Atrythyris  Attenuatella  Auchmerella  Aucklandirhynchia  Aulacatrypa  Aulacella  Aulacorphora  Aulacothyris  Aulacothyroides  Aulacothyropsis  Aulidospira  Aulie  Aulites  Aulonotreta  Auloprotonia  Aulosteges  Auricolispina  Austinella  Australiarcula  Australina  Australirhynchia  Australispira  Australocoelia  Australosia  Australospirifer  Australostrophia  Austriellula  Austrirhynchia  Austrochoristites  Austrohedra  Austronoplia  Austrospirifer  Austrothyris  Avisyrinx  Avonia  Avonothyris  Axiodeaneia  Azamella  Azygidium  |