Thalassinoides
| Thalassinoides | |
|---|---|
| Thalassinoides, burrows produced by thalassinideans, from the Middle Jurassic, Makhtesh Qatan, southern Israel | |
| Trace fossil classification | |
| Ichnogenus: | †Thalassinoides Ehrenberg, 1944 |
Thalassinoides is an ichnogenus of trace fossil (fossil records of lifeforms' movement, rather than of the lifeforms themselves) used to refer to "dichotomously or T-branched boxworks, mazes and shafts, unlined and unornamented".: 179 Facies of Thalassinoides increased suddenly in abundance at the beginning of the Mesozoic.: 251 Such burrows are made by a number of organisms, including the sea anemone Cerianthus, Balanoglossus and fishes, but are most closely associated with decapod crustaceans of the (former) infraorder Thalassinidea.