Figure 1.
Distribution of habitat types across the major clades of water scavenger beetles.
Figure 2.
A selection of habitat diversity within the Hydrophilidae.
A) Lentic habitat in a vegetated marsh, B) Lotic habitat along a mountain stream, C) Coastal dune pond, D) Detrital forest pool, E) Anacaena sp. (Chaetarthriinae) inside a drained bromeliad tank, F) Oocyclus sp. (Laccobiini: Laccobius group) on a wall seepage, G) Pelosoma sp. (Megasternini) emerging from a Heliconia inflorescence, H) wet sand habitat along a creek, I) Dactylosternum sp. (Coelostomatini) under the bark of a freshly cut tree, J) Chimaearocyon shimadai (Megasternini) in the brood chamber of Pheidole ants, photo credit: Taku Shimada, K) Rygmodus sp. (Rygmodinae) on flowers, photo credit Richard Leschen, L) Nitidulodes sp. (Megasternini) on an aroid inflorescence. All photos by A.E.Z. Short unless otherwise indicated.
Figure 3.
Time-calibrated phylogeny for major lineages of Hydrophilidae, along with estimated species richness values.
The star indicates the location of the diversification rate increase determined by our MEDUSA analysis.
Figure 4.
Relationship between clade age and estimated species richness in Hydrophilidae.
The shaded regions show 95% confidence interval of the expected diversity under a low (e = 0, solid lines) and high (e = 0.9, dashed lines) extinction.
Figure 5.
Ancestral character reconstructions of habitat transitions on the time-calibrated phylogeny of Hydrophilidae.
The pie charts at nodes indicate maximum likelihood support for ancestral states. A yellow bar indicates the location of the diversification rate shift determined by MEDUSA.