This page represents the following TreeOfLife-200M taxonomic path.[1]
Museum specimen images for Acarnus deweerdtae available via GBIF/Naturalis (preserved invertebrate zoology) depict a dark, firm sponge with an encrusting to low-relief growth on the specimen substrate.
Acarnus deweerdtae is treated as an accepted species name in GBIF, with authorship attributed to van Soest, Hooper & Hiemstra (1991).[2]
Comparative discussion in the cited literature concerns higher-rank placement of related fistular sponge genera within Poecilosclerida’s broader assemblage. Acarnus is treated only in comparative/systematic context in that work, rather than as the focal taxon with species-specific diagnosis or ecology for A. deweerdtae.[3]