Contents of World Wide Malacological CATalog (Arctic)
Classification elements
| subclassis | n. | 10 |
| superordo | n. | 1 |
| ordo | n. | 29 |
| subordo | n. | 20 |
| superfamilia | n. | 66 |
| familia | n. | 129 |
| subfamilia | n. | 119 |
| tribus | n. | 15 |
| genus | n. | 341 |
| subgenus | n. | 0 |
| speciem | n. | 1286 |
| sinonim | n. | 1 |
Numbers of species included into each familia
| CLASSIS SOLENOGASTRES | | |
| familia | sandalomeniidae | 2 |
| familia | lepidomeniidae | 1 |
| familia | meiomeniidae | 2 |
| familia | phyllomeniidae | 2 |
| familia | perimeniidae | 3 |
| CLASSIS POLYPLACOPHORA | | |
| familia | rhipidoherpiidae | 2 |
| familia | leptochitonidae | 5 |
| familia | hanleyidae | 1 |
| familia | ischnochitonidae | 21 |
| CLASSIS GASTROPODA | | |
| familia | mopaliidae | 10 |
| familia | acmaeidae | 2 |
| familia | nacellidae | 2 |
| familia | lepetidae | 1 |
| familia | lepetellidae | 1 |
| familia | choristellidae | 2 |
| familia | fissurellidae | 4 |
| familia | scissurellidae | 3 |
| familia | seguenziidae | 2 |
| familia | turbinidae | 2 |
| familia | trochidae | 22 |
| familia | skeneidae | 4 |
| familia | lissospiridae | 5 |
| familia | neritidae | 2 |
| familia | eatoniellidae | 3 |
| familia | cingulopsidae | 3 |
| familia | rissoidae | 12 |
| familia | hydrobiidae | 157 |
| familia | pomatiopsidae | 6 |
| familia | viviparidae | 18 |
| familia | ampullariidae | 3 |
| familia | planaxidae | 1 |
| familia | pleuroceridae | 193 |
| familia | vermetidae | 2 |
| familia | littorinidae | 2 |
| familia | lacunidae | 1 |
| familia | hipponicidae | 1 |
| familia | calyptraeidae | 1 |
| familia | capulidae | 10 |
| familia | lamellariidae | 2 |
| familia | velutinidae | 4 |
| familia | cypraeidae | 4 |
| familia | triviidae | 1 |
| familia | eratoidae | 1 |
| familia | ampullinidae | 4 |
| familia | naticidae | 24 |
| familia | cassidae | 1 |
| familia | ranellidae | 6 |
| familia | personidae | 1 |
| familia | atlantidae | 2 |
| familia | cerithiopsidae | 1 |
| familia | epitoniidae | 3 |
| familia | janthinidae | 3 |
| familia | eulimidae | 3 |
| familia | stiliferidae | 1 |
| familia | muricidae | 15 |
| familia | buccinidae | 88 |
| familia | volutidae | 6 |
| familia | marginellidae | 2 |
| familia | volutomitridae | 3 |
| familia | cancellariidae | 7 |
| familia | drilliidae | 2 |
| familia | turridae | 91 |
| familia | mathildidae | 1 |
| familia | pyramidellidae | 2 |
| familia | valvatidae | 16 |
| familia | orbitestellidae | 1 |
| familia | acteonidae | 5 |
| familia | hydatinidae | 1 |
| familia | cylichnidae | 2 |
| familia | philinidae | 1 |
| familia | diaphanidae | 9 |
| familia | haminoeidae | 1 |
| familia | retusidae | 1 |
| familia | aplysiidae | 1 |
| familia | cavoliniidae | 3 |
| 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 | 6 |
| familia | nuculanidae | 3 |
| familia | yoldiidae | 7 |
| familia | siliculidae | 2 |
| familia | arcidae | 4 |
| familia | limopsidae | 10 |
| familia | glycymerididae | 1 |
| familia | phylobryidae | 3 |
| familia | mytilidae | 9 |
| familia | limidae | 5 |
| familia | ostreidae | 2 |
| familia | gryphaeidae | 1 |
| familia | pectinidae | 16 |
| familia | propeamussiidae | 4 |
| familia | anomiidae | 1 |
| familia | margaritiferidae | 2 |
| familia | unionidae | 82 |
| familia | lucinidae | 1 |
| familia | thyasiridae | 5 |
| familia | kelliidae | 4 |
| familia | leptonidae | 1 |
| familia | montacutidae | 9 |
| familia | cyamiidae | 2 |
| familia | perrierinidae | 1 |
| familia | carditidae | 2 |
| familia | condylocardiidae | 1 |
| familia | astartidae | 6 |
| familia | cardiidae | 2 |
| familia | mactridae | 2 |
| familia | tellinidae | 6 |
| familia | psammobiidae | 2 |
| familia | pharidae | 2 |
| familia | pisidiidae | 26 |
| familia | myidae | 3 |
| familia | gastrochaenidae | 1 |
| familia | hiatellidae | 3 |
| familia | pholadidae | 2 |
| familia | teredinidae | 3 |
| familia | thraciidae | 2 |
| familia | laternulidae | 1 |
| familia | lyonsiidae | 2 |
| familia | poromyidae | 1 |
| familia | cuspidariidae | 4 |
| CLASSIS SCAPHOPODA | | |
| familia | verticordiidae | 1 |
| familia | dentaliidae | 1 |
| errors | n. | 0 |