| Common Name | Scientific Name | Code |
| n/a | Frutidella caesioatra (Schaerer) Kalb | FRCA14 |
| n/a | Frutidella Kalb | FRUTI |
| n/a | Lecidea ahlesii (Korber) Nyl. | LEAH |
| n/a | Lecidea amaurospoda (Anzi) Vainio | LEAM11 |
| n/a | Lecidea crassilabra Mull. Arg. | LECR11 |
| n/a | Lecidea cyrtidia Tuck. | LECY8 |
| n/a | Lecidea laboriosa Mull. Arg. | LELA34 |
| n/a | Lecidea leprarioides Tonsberg | LELE25 |
| n/a | Lecidea praenubila Nyl. | LEPR18 |
| n/a | Lecidea praetermissa Tonsberg | LEPR19 |
| n/a | Lecidea roseotincta Coppins & Tonsberg | LERO3 |
| n/a | Lecidea swartzioides Nyl. | LESW |
| Baffin lecidea lichen | Lecidea baffiniana H. Magn. | LEBA3 |
| California lecidea lichen | Lecidea californica Zahlbr. | LECA31 |
| Cascade lecidea lichen | Lecidea cascadensis H. Magn. | LECA34 |
| cecidonia lichen | Cecidonia Treibel & Rambold | CECID |
| cecidonia lichen | Cecidonia umbonella (Nyl.) Triebel & Rambold | CEUM3 |
| cockleshell lichen | Hypocenomyce castaneocinerea (Rasanen) Timdal | HYCA20 |
| cockleshell lichen | Hypocenomyce Choisy | HYPOC2 |
| cockleshell lichen | Hypocenomyce leucococca R. Sant. | HYLE3 |
| cockleshell lichen | Hypocenomyce praestabilis (Nyl.) Timdal | HYPR4 |
| cockleshell lichen | Hypocenomyce scalaris (Ach.) Choisy | HYSC6 |
| cockleshell lichen | Hypocenomyce sorophora (Vainio) P. James & Poelt | HYSO |
| cockleshell lichen | Hypocenomyce xanthococca (Sommerf.) P. James & Gotth. Schneider | HYXA |
| Degel's lecidea lichen | Lecidea degelii H. Magn. | LEDE8 |
| Eckfeldt's lecidea lichen | Lecidea eckfeldtii Zahlbr. | LEEC |
| fir lecidea lichen | Lecidea picea Lynge | LEPI7 |
| Florida lecidea lichen | Lecidea floridensis Nyl. | LEFL10 |
| Fries's cockleshell lichen | Hypocenomyce friesii (Ach.) P. James & Gotth. Schneider | HYFR3 |
| Frutidella caesioatra | Lecidea arctica Sommerf. | LEAR20 |
| Frutidella caesioatra | Lecidea caesioatra Schaerer | LECA30 |
| Hasse's lecidea lichen | Lecidea hassei Zahlbr. | LEHA8 |
| Hypocenomyce friesii | Lecidea friesii Ach. | LEFR8 |
| Hypocenomyce friesii | Psora friesii (Ach.) Hellbom | PSFR2 |
| Hypocenomyce scalaris | Lecidea ostreata (Hoffm.) Schaerer | LEOS2 |
| Hypocenomyce scalaris | Lecidea scalaris (Ach. ex Lilj.) Ach. | LESC10 |
| Hypocenomyce scalaris | Psora ostreata Hoffm. | PSOS |
| Hypocenomyce scalaris | Psora scalaris (Ach. ex Lilj.) Hook. | PSSC10 |
| Hypocenomyce xanthococca | Lecidea xanthococca Sommerf. | LEXA3 |
| Labrador lecidea lichen | Lecidea labradorica Arnold | LELA16 |
| Lecidea alpestris | Lecidea stenotera (Nyl.) Nyl. | LEST22 |
| Lecidea amaurospoda | Biatora pullata Norman | BIPU3 |
| Lecidea amaurospoda | Lecidea pullata (Norman) Th. Fr. | LEPU16 |
| Lecidea cascadensis | Lecidea washingtonensis H. Magn. | LEWA5 |
| Lecidea fuscoatra | Lecidea grisella Florke ex Schaerer | LEGR20 |
| Lecidea hassei | Lecidea antoniensis H. Magn. | LEAN14 |
| Lecidea laboriosa | Lecidea leptoboloides Nyl. | LELE17 |
| Lecidea lapicida | Lecidea cyanescens Lynge | LECY10 |
| Lecidea lapicida | Lecidea lactea Florke ex Schaerer | LELA23 |
| Lecidea lapicida | Lecidea pantherina (Ach.) Th. Fr. | LEPA33 |
| lecidea lichen | Lecidea Ach. | LECID2 |
| lecidea lichen | Lecidea admiscens Nyl. | LEAD |
| lecidea lichen | Lecidea aitema Ach. | LEAI2 |
| lecidea lichen | Lecidea albofuscescens Nyl. | LEAL16 |
| lecidea lichen | Lecidea alpestris Sommerf. | LEAL18 |
| lecidea lichen | Lecidea amabilis de Lesd. | LEAM4 |
| lecidea lichen | Lecidea amniculensis Lowe | LEAM5 |
| lecidea lichen | Lecidea atmoaria Th. Fr. | LEAT2 |
| lecidea lichen | Lecidea atrobrunnea (Raymond ex Lam. & DC.) Schaerer | LEAT62 |
| lecidea lichen | Lecidea atromarginata H. Magn. | LEAT4 |
| lecidea lichen | Lecidea atroviridis (Arnold) Th. Fr. | LEAT5 |
| lecidea lichen | Lecidea auriculata Th. Fr. | LEAU7 |
| lecidea lichen | Lecidea brachyspora (Th. Fr.) Nyl. | LEBR6 |
| lecidea lichen | Lecidea brunneofusca H. Magn. | LEBR7 |
| lecidea lichen | Lecidea carneoalbens Nyl. | LECA32 |
| lecidea lichen | Lecidea carnulenta (Tuck.) Fink | LECA33 |
| lecidea lichen | Lecidea cellularis Lowe | LECE4 |
| lecidea lichen | Lecidea cinerata Zahlbr. | LECI6 |
| lecidea lichen | Lecidea columnata Lowe | LECO19 |
| lecidea lichen | Lecidea confluens (Weber) Ach. | LECO21 |
| lecidea lichen | Lecidea congesta Fink | LECO22 |
| lecidea lichen | Lecidea crisima Nyl. | LECR3 |
| lecidea lichen | Lecidea cruciaria Tuck. | LECR4 |
| lecidea lichen | Lecidea delincta Nyl. | LEDE9 |
| lecidea lichen | Lecidea deminutula H. Magn. | LEDE10 |
| lecidea lichen | Lecidea despecta Th. Fr. | LEDE11 |
| lecidea lichen | Lecidea diapensiae Th. Fr. | LEDI12 |
| lecidea lichen | Lecidea diducens Nyl. | LEDI13 |
| lecidea lichen | Lecidea dolodes Nyl. | LEDO6 |
| lecidea lichen | Lecidea ecrustacea (Anzi ex Arnold) Arnold | LEEC2 |
| lecidea lichen | Lecidea ementiens Nyl. | LEEM |
| lecidea lichen | Lecidea enterophaea Vainio | LEEN2 |
| lecidea lichen | Lecidea erythrophaea Florke ex Sommerf. | LEER4 |
| lecidea lichen | Lecidea extenuata Vainio | LEEX3 |
| lecidea lichen | Lecidea flavidolivens (Tuck.) Fink | LEFL9 |
| lecidea lichen | Lecidea fuliginosa Taylor | LEFU6 |
| lecidea lichen | Lecidea furfurosa Tuck. ex Nyl. | LEFU7 |
| lecidea lichen | Lecidea furva Lowe | LEFU8 |
| lecidea lichen | Lecidea furvonigrans (Tuck.) Zahlbr. | LEFU9 |
| lecidea lichen | Lecidea fuscatoatra Nyl. | LEFU10 |
| lecidea lichen | Lecidea fuscoatra (L.) Ach. | LEFU11 |
| lecidea lichen | Lecidea glaucopholis Nyl. | LEGL9 |
| lecidea lichen | Lecidea goniophiloides de Lesd. | LEGO4 |
| lecidea lichen | Lecidea hebescens Nyl. | LEHE5 |
| lecidea lichen | Lecidea holopolia (Tuck.) Zahlbr. | LEHO3 |
| lecidea lichen | Lecidea homosema Nyl. | LEHO5 |
| lecidea lichen | Lecidea humilis Lowe | LEHU5 |
| lecidea lichen | Lecidea hypomela Nyl. | LEHY7 |
| lecidea lichen | Lecidea intropallida Fink | LEIN11 |
| lecidea lichen | Lecidea katahdinensis Degel. | LEKA3 |
| lecidea lichen | Lecidea lapicida (Ach.) Ach. | LELA60 |
| lecidea lichen | Lecidea lepidastra (Tuck.) Hasse | LELE16 |
| lecidea lichen | Lecidea leucothallina Arnold | LELE18 |
| lecidea lichen | Lecidea limosa Ach. | LELI6 |
| lecidea lichen | Lecidea lurida (Ach.) DC. | LELU3 |
| lecidea lichen | Lecidea mammillana Tuck. | LEMA12 |
| lecidea lichen | Lecidea marciensis Lowe | LEMA14 |
| lecidea lichen | Lecidea melaphanoides Nyl. | LEME11 |
| lecidea lichen | Lecidea micytho Tuck. | LEMI17 |
| lecidea lichen | Lecidea mutabilis Fee | LEMU7 |
| lecidea lichen | Lecidea myriocarpella (G. Merr.) Zahlbr. | LEMY2 |
| lecidea lichen | Lecidea nemoralis Lowe | LENE13 |
| lecidea lichen | Lecidea olivascens Th. Fr. | LEOL2 |
| lecidea lichen | Lecidea paddensis (Tuck.) Zahlbr. | LEPA20 |
| lecidea lichen | Lecidea peliaspis (Tuck.) Zahlbr. | LEPE13 |
| lecidea lichen | Lecidea phaeopelidna Vainio | LEPH3 |
| lecidea lichen | Lecidea phaeops Nyl. | LEPH4 |
| lecidea lichen | Lecidea plana (J. Lahm) Nyl. | LEPL2 |
| lecidea lichen | Lecidea planetica Tuck. | LEPL3 |
| lecidea lichen | Lecidea plebeja Nyl. | LEPL4 |
| lecidea lichen | Lecidea polycocca Sommerf. | LEPO9 |
| lecidea lichen | Lecidea populina Mull Arg. ex Nyl. | LEPO10 |
| lecidea lichen | Lecidea promiscens Nyl. | LEPR10 |
| lecidea lichen | Lecidea protabacina Nyl. | LEPR11 |
| lecidea lichen | Lecidea pulla Lowe | LEPU10 |
| lecidea lichen | Lecidea pumicicola H. Magn. | LEPU11 |
| lecidea lichen | Lecidea pycnocarpa (Korber) Ohlert | LEPY3 |
| lecidea lichen | Lecidea ramulosa Th. Fr. | LERA60 |
| lecidea lichen | Lecidea rivulorum H. Magn. | LERI |
| lecidea lichen | Lecidea rufofusca (Anzi) Nyl. | LERU7 |
| lecidea lichen | Lecidea scrobiculata Th. Fr. | LESC6 |
| lecidea lichen | Lecidea scrupulosa (Eckf.) H. Magn. | LESC7 |
| lecidea lichen | Lecidea silacea Ach. | LESI6 |
| lecidea lichen | Lecidea somphoterella Vainio | LESO4 |
| lecidea lichen | Lecidea soredifera Lowe | LESO5 |
| lecidea lichen | Lecidea sphaerella Hedl. | LESP5 |
| lecidea lichen | Lecidea subaglaea de Lesd. | LESU11 |
| lecidea lichen | Lecidea subcandida H. Magn. | LESU12 |
| lecidea lichen | Lecidea sublimosa Nyl. | LESU13 |
| lecidea lichen | Lecidea subplebeja Vainio | LESU14 |
| lecidea lichen | Lecidea subramosa Lowe | LESU15 |
| lecidea lichen | Lecidea subrhagadiella Lynge | LESU16 |
| lecidea lichen | Lecidea subtilis Degel. | LESU17 |
| lecidea lichen | Lecidea tenayucae de Lesd. | LETE10 |
| lecidea lichen | Lecidea tenuissima Lynge | LETE11 |
| lecidea lichen | Lecidea tessellata Florke | LETE60 |
| lecidea lichen | Lecidea tessellata Florke var. caesia (Anzi) Arnold | LETEC |
| lecidea lichen | Lecidea torquens Mull. Arg. | LETO7 |
| lecidea lichen | Lecidea umbonata (Hepp) Mudd | LEUM4 |
| lecidea lichen | Lecidea violascens H. Magn. | LEVI16 |
| lecidea lichen | Lecidea xanthococcoides Zahlbr. | LEXA2 |
| Lecidea lithophila | Lecidea pruinosa Ach. | LEPR16 |
| Lecidea lurida | Lecidea petri (Tuck.) Zahlbr. | LEPE20 |
| Lecidea lurida | Psora lurida (Ach.) DC. | PSLU5 |
| Lecidea lurida | Psora petri (Tuck.) Fink | PSPE5 |
| Lecidea mannii | Lecidea atrolutescens Nyl. | LEAT12 |
| Lecidea olivascens | Lecidea caesiocoronata Lowe | LECA44 |
| Lecidea plana | Lecidea latypea Ach. | LELA26 |
| Lecidea plebeja | Lecidea myriocarpoides Nyl. | LEMY3 |
| Lecidea populina | Micarea populina (Mull. Arg. ex Nyl.) R. Anderson & M. P. Carmer | MIPO6 |
| Lecidea praenubila | Lecidea paupercula Th. Fr. | LEPA22 |
| Lecidea sphaerella | Lecidea sylvana (Korber) Th. Fr. | LESY4 |
| Lecidea tessellata | Lecidea columbiana H. Magn. | LECO34 |
| Lecidea tessellata | Lecidea cyanea (Ach.) Rohl. | LECY9 |
| Lecidea tessellata | Lecidea homalodes Nyl. | LEHO4 |
| Lecidea tessellata | Lecidea occidentalis Lynge | LEOC4 |
| Louisiana lecidea lichen | Lecidea louisianae de Lesd. | LELO5 |
| Lynge's lecidea lichen | Lecidea lyngei Degel. | LELY3 |
| Mann's lecidea lichen | Lecidea mannii Tuck. | LEMA13 |
| Maryland lecidea lichen | Lecidea marylandensis H. Magn. | LEMA15 |
| Merrill's lecidea lichen | Lecidea merrillii H. Magn. | LEME12 |
| Morelii's lecidea lichen | Lecidea moreliiensis de Lesd. | LEMO10 |
| Nearing's lecidea lichen | Lecidea nearingii H. Magn. | LENE12 |
| northern lecidea lichen | Lecidea polaris Lynge | LEPO8 |
| Nylander's lecidea lichen | Lecidea nylanderi (Anzi) Th. Fr. | LENY2 |
| Pacific lecidea lichen | Lecidea pacifica Herre | LEPA19 |
| rockloving lecidea lichen | Lecidea lithophila (Ach.) Ach. | LELI7 |
| rugose lecidea lichen | Lecidea rugosa Lowe | LERU8 |
| Santa Monica lecidea lichen | Lecidea santae-monicae H. Magn. | LESA10 |
| Steiner's lecidea lichen | Lecidea steineri Hertel | LEST13 |
| Steinia geophana | Lecidea geophana Nyl. | LEGE5 |
| steinia lichen | Steinia geophana (Nyl.) Stein | STGE3 |
| steinia lichen | Steinia Korber | STEIN2 |
| Ted's lecidea lichen | Lecidea theodori Lynge | LETH9 |
| Truckee lecidea lichen | Lecidea truckeei Herre | LETR8 |
| Virginia lecidea lichen | Lecidea virginiensis Calk. & Nyl. | LEVI17 |