Diplochaetetes is an extinct genus of marine polychaete worms in the family Cirratulidae.

[3] Later studies provided significant evidence that Diplochaetetes fossils are bioconstructions attributable to cirratulid polychaetes due to their strong similarity with modern Dodecaceria aggregates.

[4][5][6] Both fossil Diplochaetetes and recent Dodecaceria bioconstructions retain identical double-phased biomineralization characteristics, but the possible synonymity of these genera is currently subject to debate.

[7] The first Diplochaetetes fossils were discovered in Namibian sediments dating back to the Eocene.

[2] No known Paleocene record has been described, but from the Oligocene onwards, aggregates are found in the pacific coasts of the Americas.