
Imparidentia
Imparidentia is a major clade of bivalves named by Bieler, Mikkelsen, and Giribet in 2014; this clade, commonly recovered in phylogenetic analyses, consists of all euheterodonts other than the anomalodesmatans. The name comes from Latin impar "unequal" and dens "tooth", in reference to the unequal hinge teeth seen in members of the clade. The relationships among members of Imparidentia are uncertain.
The following orders belong within Imparidentia:
11 branches of this group, most-observed first

Venerids
orderVenerida

True Cockles, Tellins, and Allies
orderCardiida

Myida
orderMyida

Rock-borers, Jacknives, and Razor Clams
orderAdapedonta

Lucinida
orderLucinida

Pea Clams, Fingernail Clams and Allies
orderSphaeriida

Galeommatida
orderGaleommatida

Gastrochaenida
orderGastrochaenida

Cyamioidea
superfamilyCyamioidea

Rudists
orderHippuritida

Megalodontida
orderMegalodontida
Where it lives
Recorded sightings
—
geo-referenced records in GBIF, from museums, herbaria and field observers.
Drag the globe to turn it. Dots are where records exist, not a range map; darker means more records.
In the stacks
Searching the stacks…
Every page naming Imparidentia in the Biodiversity Heritage Library →
This page is assembled live from iNaturalist, GBIF, Wikipedia, the Source Library and the Internet Archive. It is not yet part of the hand-edited codex. iNaturalist taxon 551317.