Pleurozia | |
---|---|
Pleurozia purpurea. | |
Scientific classification | |
Kingdom: | Plantae |
Division: | Marchantiophyta |
Class: | Jungermanniopsida |
Order: | Pleuroziales |
Family: |
Pleuroziaceae (Schiffn.) Müll. |
Genus: |
Pleurozia Dumort. |
Species | |
Pleurozia acinosa |
|
Synonyms | |
Eopleurozia Schust. |
Pleurozia acinosa
Pleurozia articulata
Pleurozia caledonica
Pleurozia conchifolia
Pleurozia curiosa
Pleurozia gigantea
Pleurozia heterophylla
Pleurozia johannis-winkleri
Pleurozia paradoxa
Pleurozia pocsii
Pleurozia purpurea
Pleurozia subinflata
Eopleurozia Schust.
Physiotium Nees
Pleurozia is the only genus of liverworts in the family Pleuroziaceae, which is now classified in its own order Pleuroziales, but was previously included in a broader circumscription of the Jungermanniales. The genus includes eleven species, and as a whole is both physically distinctive and widely distributed. The lower leaf lobes of Pleurozia species are fused, forming a closed water sac covered by a movable lid similar in structure to those of the angiosperm genus Utricularia. These sacs were assumed to play a role in water storage, but a 2005 study on Pleurozia purpurea found that the sacs attract and trap ciliates, much in the same way as Utricularia. Observations of plants in situ also revealed a large number of trapped prey within the sacs, suggesting that the species in this genus obtain some benefit from a carnivorous habit. After Colura, this was the second report of zoophagy among the liverworts.