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iNat·341618OrderMollusca189 field observations
  1. Animals
  2. ›Molluscs
  3. ›Bivalves
  4. ›Autobranchia
  5. ›Heteroconchia
  6. ›Freshwater Mussels and Brooch Clams
Brooch Clams
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Brooch Clams

Trigoniida

Trigoniida is an order of medium-sized saltwater clams, marine bivalve molluscs. Within the fossil record the occurrence of this order is widespread, ranging from the Devonian Period to Recent.

The diagnostic feature for the order is the unique and complex dentition of the shell, (i.e. the interior hinge teeth that articulate the two valves). The dentition is particularly elaborate within the family Trigoniidae.

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3 branches of this order, most-observed first

Brooch Clams

superfamilyTrigonioidea

Megatrigonioidea

superfamilyMegatrigonioidea

Myophorelloidea

superfamilyMyophorelloidea

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Where it lives

Recorded sightings

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geo-referenced records in GBIF, from museums, herbaria and field observers.

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In the stacks

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Every page naming Trigoniida 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 341618.