Tolong jelaskan mengenai A dari Daftar genus brakiopoda

Babinia Racheboeuf & Branisa, 1985

Baranovus = Obscurella Baranov, 1991 (preoccupied)

Gruntia = Boloria Grunt, 1973 (preoccupied)

Nalivkiniella = Ala Nalivkin, 1979 (preoccupied)

Neopaulinella = Paulinella Boucot & Racheboeuf, 1987 (preoccupied)

Neosandia = Sandia Sutherland & Harlow, 1973 (preoccupied)

Paleolibys = Libys Massa, Termier & Termier, 1974 (preoccupied)

Paleopetria = Petria Mendes, 1957 (preoccupied)

Sartenaerus = Centrorhynchus Sartenaer, 1970 (preoccupied)

Sestropoma Setigerites Settedabania Severella Severginella Shagamella Shaleria Shaleriella Sharpirhynchia Shimodaia Shiquianella Shiragia Shishapangmaella Shlyginia Shordolella Shoshonorthis Shouxianella Shrockia Shumardella Siberiothyris Siberistrophia Sibiratrypa Sibiria Sibirispira Sibiritoechia Sicelia Sichuanrhynchis Sicorhyncha Sicularia Sieberella Sigmelasma Sigopallus Sikasella Silesiathyris Simplicarina Simpliciforma Simplicithyris Sinochonetes Sinoglossa Sinoproductella Sinorhynchia Sinorthis Sinoshaleria Sinostrophia Sinotectirostrum Sinotrimerella Sinuatella Sinucosta Sinucostella Sinuplicorhynchia Sinusella Siphonobolus Siphonosia Siphonotreta Sivorthis Skelidorygma Skenidioides Skenidium Slavinithyris Slovenirhynchia Smeathenella Smirnovaena Smirnovina Snezhnorhynchia Socraticum Sogxianthyris Sokolskya Solidipontirostrum Solitudinella Somalirhynchia Somalitela Somalithyris Sommeriella Sonculina Songzichonetes Soudleyella Sowerbina Sowerbyella Sowerbyites Spanodonta Spasskothyris Sphaerathyris Sphaerirhynchia Sphaeroidothyris Sphenalosia Sphenarina Sphenophragmus Sphenorhynchia Sphenorthis Sphenospira Sphenosteges Sphenotreta Sphriganaria Spinarella Spinatrypa Spinatrypina Spinauris Spinella Spinifrons Spinilingula Spinispirifer Spinocarinifera Spinochonetes Spinocyrtia Spinolepismatina Spinolyttonia Spinomarginifera Spinomartinia Spinoplasia Spinopunctatrypa Spinorthis Spinorugifera Spinospirifer Spinostrophia Spinulicosta Spinuliplica Spinulothele Spinulothyris Spirelytha Spirifer Spiriferella Spiriferellina Spiriferelloides Spiriferina Spiriferinaella Spiriferinoides Spirigerella Spirigerellina Spirigerina Spirinella Spirisosium Spiropunctifera Spitzbergenia Spondyglossella Spondylobolus Spondylopyxis Spondylospira Spondylostrophia Spondylothyris Spondylotreta Spuriosa Spurispirifer Spyridiophora Squamaria Squamathyris Squamatina Squamilingulella Squamiplana Squamirhynchia Squamularia Squamulariina Stainbrookia Stauromata Stegacanthia Stegerhynchops Stegerhynchus Stegocornu Stegorhynchella Steinhagella Stelckia Stenaulacorhynchus Stenocamara Stenoglossariorhynchus Stenogmus Stenometoporhynchus Stenopentamerus Stenorhynchia Stenorina Stenosarina Stenoscisma Stepanoconchus Stepanoviella Stepanoviina Stereochia Stethothyris Stichotrophia Stictozoster Stilpnotreta Stiphrothyris Stipulina Stolmorhynchia Stolzenburgiella Straelenia Streptaria Streptis Streptopomum Streptorhynchus Striarina Striatifera Striatochonetes Striatoproductella Striatopugnax Striatorhynchus Striatospica Stricklandia Stricklandiella Stricklandistrophia Strictozoster Strigirhynchia Strigospina Striirhynchia Striirichthofenia Striispirifer Striithyris Stringocephalus Stringodiscus Stringomimus Striochonetes Strixella Strongylobrochus Strongyloria Strophalosia Strophalosiella Strophalosiina Strophochonetes Strophodonta Strophomena Strophonella Strophonellites Strophonelloides Strophopleura Strophoprion Strophoproductus Strophorichthofenia Stroudithyris Struveina Struvethyris Sturtella Subansiria Subcuspidella Subglobosochonetes Subrensselandia Subriana Subsinucephalus Subspirifer Substriatifera Subtaeniothaerus Subtransmena Suessia Sufetirhyncha Suiaella Sulcataria Sulcathyris Sulcatina Sulcatinella Sulcatorthis Sulcatospira Sulcatospirifer Sulcatostrophia Sulcatothyris Sulcicosta Sulcicostula Sulciphoria Sulciplica Sulciplicatatrypa Sulcirhynchia Sulcirostra Sulcirugaria Sulcispiriferina Sulcorhynchia Sulcupentamerus Sulevorthis Supertrilobus Surindia Surugathyris Svalbardia Svalbardoproductus Svaljavithyris Svetlania Svobodaina Swaicoelia Swantonia Symmatrypa Symphythyris Synatrypa Syndielasma Syntomaria Syntrophia Syntrophina Syntrophinella Syntrophioides Syntrophodonta Syntrophopsis Sypharatrypa Syringospira Syringothyris Systenothyris''