Contents of World Wide Malacological CATalog (Boreal)
Classification elements
| subclassis | n. | 10 |
| superordo | n. | 1 |
| ordo | n. | 26 |
| subordo | n. | 18 |
| superfamilia | n. | 63 |
| familia | n. | 105 |
| subfamilia | n. | 94 |
| tribus | n. | 15 |
| genus | n. | 251 |
| subgenus | n. | 0 |
| speciem | n. | 914 |
| sinonim | n. | 3 |
Numbers of species included into each familia
| CLASSIS SOLENOGASTRES | | |
| familia | dondersiidae | 4 |
| CLASSIS POLYPLACOPHORA | | |
| familia | neomeniidae | 1 |
| CLASSIS GASTROPODA | | |
| familia | hanleyidae | 1 |
| familia | acmaeidae | 1 |
| familia | lottiidae | 1 |
| familia | nacellidae | 1 |
| familia | cocculinidae | 1 |
| familia | addisoniidae | 1 |
| familia | scissurellidae | 2 |
| familia | seguenziidae | 1 |
| familia | turbinidae | 1 |
| familia | trochidae | 9 |
| familia | skeneidae | 2 |
| familia | neritidae | 2 |
| familia | rissoidae | 6 |
| familia | hydrobiidae | 157 |
| familia | pomatiopsidae | 6 |
| familia | vitrinellidae | 1 |
| familia | tornidae | 1 |
| familia | viviparidae | 18 |
| familia | ampullariidae | 3 |
| familia | planaxidae | 1 |
| familia | pleuroceridae | 193 |
| familia | vermetidae | 1 |
| familia | littorinidae | 1 |
| familia | lacunidae | 2 |
| familia | aporrhaiidae | 1 |
| familia | hipponicidae | 1 |
| familia | calyptraeidae | 1 |
| familia | capulidae | 4 |
| familia | lamellariidae | 3 |
| familia | velutinidae | 1 |
| familia | triviidae | 1 |
| familia | naticidae | 2 |
| familia | tonnidae | 1 |
| familia | cassidae | 2 |
| familia | ranellidae | 6 |
| familia | personidae | 1 |
| familia | atlantidae | 2 |
| familia | cerithiopsidae | 3 |
| familia | triforidae | 2 |
| familia | epitoniidae | 2 |
| familia | janthinidae | 3 |
| familia | aclididae | 1 |
| familia | muricidae | 12 |
| familia | buccinidae | 16 |
| familia | columbellidae | 1 |
| familia | nassariidae | 1 |
| familia | cancellariidae | 2 |
| familia | drilliidae | 2 |
| familia | turridae | 15 |
| familia | architectonicidae | 5 |
| familia | mathildidae | 1 |
| familia | pyramidellidae | 1 |
| familia | valvatidae | 16 |
| familia | acteonidae | 4 |
| familia | hydatinidae | 1 |
| familia | haminoeidae | 1 |
| familia | aplysiidae | 1 |
| familia | cavoliniidae | 3 |
| familia | peraclidae | 1 |
| familia | acroloxidae | 1 |
| familia | lymnaeidae | 50 |
| familia | lancidae | 8 |
| familia | physidae | 68 |
| familia | planorbidae | 51 |
| familia | neoplanorbidae | 5 |
| familia | ancylidae | 8 |
| CLASSIS BIVALVIA | | |
| familia | gastrodontidae | 5 |
| familia | nuculidae | 1 |
| familia | nuculanidae | 3 |
| familia | yoldiidae | 8 |
| familia | malletiidae | 2 |
| familia | arcidae | 1 |
| familia | limopsidae | 2 |
| familia | mytilidae | 8 |
| familia | limidae | 4 |
| familia | ostreidae | 3 |
| familia | gryphaeidae | 1 |
| familia | pectinidae | 4 |
| familia | anomiidae | 1 |
| familia | margaritiferidae | 2 |
| familia | unionidae | 82 |
| familia | lucinidae | 1 |
| familia | thyasiridae | 2 |
| familia | montacutidae | 3 |
| familia | carditidae | 1 |
| familia | condylocardiidae | 1 |
| familia | crassatellidae | 1 |
| familia | astartidae | 1 |
| familia | cardiidae | 4 |
| familia | mactridae | 1 |
| familia | psammobiidae | 2 |
| familia | pharidae | 1 |
| familia | pisidiidae | 26 |
| familia | veneridae | 1 |
| familia | myidae | 1 |
| familia | erodonidae | 1 |
| familia | gastrochaenidae | 1 |
| familia | hiatellidae | 2 |
| familia | pholadidae | 1 |
| familia | teredinidae | 3 |
| familia | thraciidae | 1 |
| familia | cuspidariidae | 2 |
| errors | n. | 0 |