Babylonia spirata (order Sorbeoconcha)

Bacidia friesiana (order Lecanorales)

Bacidia igniarii (order Lecanorales)

Bacidia rosella (order Lecanorales)

Bacidia rufella (order Lecanorales)

Bacidia sabuletorum (synonymous, order Lecanorales)

Bacidia vermifera (order Lecanorales)

Bacillus marismortui  (synonymous, order Bacilli)

Bacillus subtilis  (order Bacilli)

Bactrocera dorsalis (order Diptera)

Bactrododema tiaratum  (order Phasmatodea)

Bactrospora patellarioides (order Arthoniales)

Baculum extradentatum (synonymous, order Phasmatodea)

Badhamia foliicola (order Physarales)

Badhamia melanospora (order Physarales)

Baeomyces rufus (order Baeomycetales)

Baetica ustulata (order Orthoptera)

Bagliettoa calciseda (order Verrucariales)

Bagliettoa marmorea (order Verrucariales)

Balaenoptera physalus (order Cetartiodactyla)

Balantiocheilos melanopterus (synonymous, order Cypriniformes)

Balantiocheilus melanopterus (order Cypriniformes)

Baldellia ranunculoides (order Alismatales)

Ballus chalybeius (order Araneae)

Banksia aemula (order Proteales)

Banksia ericifolia (order Proteales)

Banksia integrifolia (order Proteales)

Banksia marginata (order Proteales)

Banksia sp (order Proteales)

Bantua cf dispar (order Blattodea)

Barbacenia elegans (synonymous, order Pandanales)

Barbarea vulgaris (order Brassicales)

Barbilophozia hatcheri (order Jungermanniales)

Barbula acuta (synonymous, order Pottiales)

Barbula bolleana (order Pottiales)

Barbula tophacea (synonymous, order Pottiales)

Barringtonia asiatica (order Ericales)

Bartsia alpina (order Lamiales)

Bartsia pedicularoides (order Lamiales)

Bassia prostrata (order Caryophyllales)

Batocera rufomaculata (order Coleoptera)

Battarrea phalloides (order Agaricales)

Baudouinia fluggeiformis (order Fabales)

Bauhinia x blakeana (order Fabales)

Bauhinia forficata (order Fabales)

Beaucarnea recurvata (order Asparagales)

Beaufortia kweichowensis (order Cypriniformes)

Begonia meyeri-johannis (order Cucurbitales)

Begonia nana (order Cucurbitales)

Begonia schmidtiana (synonymous, order Cucurbitales)

Begonia subvillosa (order Cucurbitales)

Belenois aurota (order Lamiales)

Bellardia trixago (order Lamiales)

Bellis sylvestris (order Asterales)

Belone belone (order Beloniformes)

Belosynapsis kewensis (order Commelinales)

Bemangidia lowryi (order Ericales)

Bemangidia frankliniae (order Ericales)

Bembidion gredosanum (synonymous, order Coleoptera)

Bembix oculata (order Hymenoptera)

Benstonea humilis (order Pandanales)

Benstonea tunicata (order Pandanales)

Beosus maritimus (order Hemiptera)

Berberis amurensis (order Ranunculales)

Berberis canadensis (order Ranunculales)

Berberis gagnepainii (order Ranunculales)

Berberis julianae (order Ranunculales)

Berberis poiretii (order Ranunculales)

Berberis pruinosa (order Ranunculales)

Berberis trifoliolata (synonymous, order Ranunculales)

Berberis vulgaris (order Ranunculales)

Berberomeloe majalis (order Coleoptera)

Bergenia cordifolia  (synonymous, order Saxifragales)

Bergenia crassifolia  (order Saxifragales)

Bernardia myricifolia (order Malpighiales)

Bersama abyssinica (order Geraniales)

Beta macrocarpa (order Caryophyllales)

Beta maritima (order Caryophyllales)

Beta vulgaris (order Caryophyllales)

Betula pendula (order Fagales)

Betula pubescens (order Fagales)

Biatoropsis rubicundae (order Tremellales)

Bibio sp (order Diptera)

Bidens pilosa (order Asterales)

Bidens subalternans (order Asterales)

Bilimbia sabuletorum (order Lecanorales)

Billbergia fasciata (synonymous, order Poales)

Billbergia nutans (order Poales)

Biophytum sensitivum (order Oxalidales)

Biophytum umbraculum (order Oxalidales)

Biscutella auriculata (order Brassicales)

Biscutella rosularis (order Brassicales)

Bismarckia nobilis (order Arecales)

Bistorta officinalis (order Caryophyllales)

Bituminaria bituminosa (order Fabales)

Bivetiella cancellata (order Sorbeoconcha)

Blaeria filago (synonymous, order Ericales)

Blanus cinereus (order Squamata)

Blaps lethifera (order Coleoptera)

Blaps lusitanica (order Coleoptera)

Blaptica dubia (order Blattodea)

Blastenia herbidella (order: Teloschistales)

Blastenia hungarica (order: Teloschistales)

Blatta orientalis (order Blattodea)

Blattella vaga (order Blattodea)

Blechnum brasiliense (synonymous, order Polypodiales)

Blechnum cartilagineum (synonymous, order Polypodiales)

Blechnum discolor (synonymous, order Polypodiales)

Blechnum hastatum (order Polypodiales)

Blechnum indicum (synonymous, order Polypodiales)

Blechnum patersonii (synonymous, order Polypodiales)

Blechnum penna-marina (synonymous, order Polypodiales)

Blechnum spicant (synonymous, order Polypodiales)

Blechnum wattsii (synonymous, order Polypodiales)

Bolbitius elegans (order Agaricales)

Bolbitius lactea (synonymous, order Agaricales)

Bolbitius tener (synonymous, order Agaricales)

Bolbitius titubans (order Agaricales)

Boletus aereus (order Boletales)

Boletus lepidus (synonymous, order Boletales)

Boletus lupinus (order Boletales)

Boletus luridus (synonymous, order Boletales)

Boletus queletii (order Boletales)

Boletus radicans (synonymous, order Boletales)

Boletus subtomentosus (order Boletales)

Bolinus brandaris (order Sorbeoconcha)

Bolma rugosa (order Vetigastropoda)

Bombina orientalis (order Anura)

Bombina variegata (order Anura)

Bombus lapidarius (order Hymenoptera)

Bombus magnus (order Hymenoptera)

Bombus pascuorum (order Hymenoptera)

Bombus terrestris  (order Hymenoptera)

Bombycilaena discolor (order Asterales)

Bombyx mori (order Lepidoptera)

Borassus flabellifer (order Arecales)

Bos primigenius (order Cetartiodactyla)

Bos taurus (synonymous, order Cetartiodactyla)

Botrychium lunaria (order Ofioglossales)

Bougainvillea arborea (order Caryophyllales)

Bolivina variabilis  (order Rotaliida)

Bovista nigrescens (order Agaricales)

Bovista plumbea (order Agaricales)

Bowenia spectabilis (order Cycadales)

Brachiaria ramosa (synonymous, order Poales)

Brachylaena ramiflora (order Asterales)

Brachychiton acerifolius (order Malvales)

Brachycaudus aconiti (order Hemiptera)

Brachycoleus triangularis (order Hemiptera)

Brachypodium phoenicoides (order Poales)

Brachypodium retusum (order Poales)

Brachypodium sylvaticum (order Poales)

Brachystephanus lyallii (order Lamiales)

Brachythecium salebrosum (order Hypnales)

Brachythecium velutinum (order Hypnales)

Brachythemis contaminata (order Odonata)

Brassica insularis (order Brassicales)

Brassica oleracea (order Brassicales)

Brintesia circe (order Lepidoptera)

Brithys crini (order Lepidoptera)

Briza maxima (order Poales)

Briza minor (order Poales)

Brodoa atrofusca (order Lecanorales)

Brodoa intestiniformis (order Lecanorales)

Bromus catharcticus (order Poales)

Bromus diandrus (order Poales)

Bromus hordeaceus (order Poales)

Bromus lanceolatus (order Poales)

Bromus madritensis (order Poales)

Bromus rubens (order Poales)

Bruguiera gymnorrhiza (order Malpighiales)

Bruguiera sexangula (order Malpighiales)

Brunneosphaerella jonkershoekensis (order Capnodiales)

Bryocaulon divergens (order Lecanorales)

Bryoerythrophyllum campylocarpum (order Pottiales)

Bryonia dioica (order Cucurbitales)

Bryophyllum delagoense (synonymous, order Saxifragales)

Bryophyllum tubiflorum (synonymous, order Saxifragales)

Bryopsis plumosa (order Bryopsidales)

Bryoria araucana (order Lecanorales)

Bryoria bicolor (order Lecanorales)

Bryoria capillaris (order Lecanorales)

Bryoria furcellata (order Lecanorales)

Bryoria fuscescens (order Lecanorales)

Bryoria glabra (order Lecanorales)

Bryoria nadvornikiana (order Lecanorales)

Bryoria simplicior (order Lecanorales)

Bryum argenteum (order Bryales)

Bryum barnesii (synonymous, order Bryales)

Bryum bicolor (synonymous, order Bryales)

Bryum capillare (synonymous, order Bryales)

Bryum dichotomum (synonymous, order Bryales)

Bryum dunense (synonymous, order Bryales)

Bryum gemmiparum (synonymous, order Bryales)

Bryum pseudotriquetrum (synonymous, order Bryales)

Bryum radiculosum (synonymous, order Bryales)

Bryum torquescens (synonymous, order Bryales)

Bryum versicolor (synonymous, order Bryales)

Bubas bubalus (order Coleoptera)

Bubo bubo (order Strigiformes)

Buccinum undatum (order Sorbeoconcha)

Buellia aethalea (order Teloschistales)

Buellia griseovirens (order Teloschistales)

Buellia iberica (order Teloschistales)

Buellia punctata (synonymous, order Teloschistales)

Bufo bufo (order Anura)

Bufo calamita (synonymous, order Anura)

Bufo marinus (synonymous, order Anura)

Buglossoides arvensis (order Boraginales)

Buglossoides incrassata (order Boraginales)

Bulbine frutescens (order Asparagales)

Bulbochaete minor (order Oedogoniales)

Bulbophyllum cruentum (order Asparagales)

Bulbophyllum longiflorum (order Asparagales)

Bulbophyllum pentastichum (order Asparagales)

Bulbothrix goebelii (order Lecanorales)

Bulbothrix tabacina (order Lecanorales)

Bulla striata (order Opisthobranchia)

Bupleurum fruticosum (order Apiales)

Bupleurum paniculatum (synonymous, order Apiales)

Bupleurum rigidum (order Apiales)

Bupleurum salicifolium (order Apiales)

Bupleurum spinosum (order Apiales)

Bupleurum stellatum (order Apiales)

Buprestis octoguttata (order Coleoptera)

Buteo buteo (order Accipitriformes)

Buthus martensii (synonymous, order Scorpiones)

Buthus occitanus (order Scorpiones)

Butomus umbellatus (order Alismatales)

Buxus balearica (order Buxales)

Buxus madagascarica (order Buxales)

Buxus rabenantoandroi (order Buxales)

Buxus sempervirens (order Buxales)