Trigoniidae

Internal mold of Laevitrigonia gibbosa from the Portland Limestone (Upper Jurassic), Isle of Portland, Dorset, England

The trigoniid hinge, showing interior view of the left valve (A) and right valve (B) of Trigonia. The notation 2, 3a, 3b, 4a, 4b and 5a refer to the numbers assigned to individual teeth.

Trigoniidae is a taxonomic family of saltwater clams, marine bivalve mollusks in the superfamily Trigonioidea. There is only one living genus, Neotrigonia, but in the geological past this family was well represented, widespread and common. The shells of species in this family are morphologically unusual, with very elaborate hinge teeth, and the exterior of the shell is highly ornamented.

单词	Trigoniid
释义	Trigoniid 英语百科 Trigoniidae Trigoniidae is a taxonomic family of saltwater clams, marine bivalve mollusks in the superfamily Trigonioidea. There is only one living genus, Neotrigonia, but in the geological past this family was well represented, widespread and common. The shells of species in this family are morphologically unusual, with very elaborate hinge teeth, and the exterior of the shell is highly ornamented.
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