WISCONSINAN MOLLUSCAN FAUNAS 



17 



SPECIES 



WISCONSINAN SUBSTAGES 



ALTONI AIM 



FARMDALIAN 



WOOOFORDIAN 



APLEXA HYPNORUM 

 CARYCHIUM EXILE CANADENSE 

 COLUMELLA ALT I COLA 

 EUCONULUS FULVUS 

 GASTROCOPTA HOLZINGERI 

 GA S T ROC OP TA PEN TODON 

 G YRA ULUS PARVUS 

 HE LI SOMA TRIVOLVIS 

 ME SO DON CLAUSUS 

 PLANORBULA ARMIGERA 

 PUPILLA MUSCORUM 

 PUPOIDES ALBILABRIS 

 STENOTREMA LEA I 

 TRIODOPSIS ALGONQUINENSIS 

 TRIODOPSIS MULTILINEATA 

 VERTIGO ALPESTRIS OUGHTONI 

 VERTIGO MILIUM 

 VERTIGO MODE ST A 

 ANGUISPIRA ALTERNATA 

 HAPLOTREMA CONCAVUM 

 HENDERSON/A OCCULTA 

 STENOTREMA FRATERNUM 

 STENOTREMA HIRSUTUM 

 SUC CINE A OVAL IS 

 C ION ELLA LUBRICA 

 DISCUS CRONKHITEI 

 DISCUS MACCLINTOCKI 

 GA S T ROC OP TA A RMIFERA 

 GASTROCOPTA CONTRACT A 

 HAWAII A MINUSCULA 

 HELICODISCUS PARALLELUS 

 MESODON THYROIDUS 

 POMATIOPSIS SCALAR IS 

 PUNCTUM MINUTISSIMUM 

 RETINELLA ELECTRINA 

 STROBILOPS LABYRINTHICA 

 SUCCINEA GEL IDA 

 SUCCINEA GROSVENORI 

 VALLONIA GRACILICOSTA 

 VALL ONI A PA R VUL A 

 VERTIGO HUBRICHTI 

 ZONITOIDES AR BORE US 

 GYRAULUS ALTISSIMUS 

 HE LI SOMA ANT ROSA 

 LYMNAEA DALLI 

 LYMNAEA OBRUSSA DEC AM PI 

 LYMNAEA PARVA 

 TRIODOPSIS FOSTER! 

 VA L VA TA TRI CARINA TA 

 AMNIO OLA LEIGH TON I 

 AM NICOLA LUST RICA 

 GYRAULUS CRISTUS 

 LYMNAEA PALUSTRIS 

 VALVATA SINCERA 

 ALLOGONA PROFUNDA 

 ANGUISPIRA KOCH I 

 TRIODOPSIS HUBRICHTI 

 TRIODOPSIS ALTONENSIS 



RARE 



COMMON 



ABUNDANTI 



Fig. 3 - Time-stratigraphic distribution of Wisconsinan snail faunas. Gastrocopta 

 procera also should be included in the Woodfordian. 



