[1] One notable group of prosthecates is the genus Caulobacter.
Prosthecates are generally chemoorganotrophic aerobes that can grow in nutrient-poor habitats, being able to survive at nutrient levels on the order of parts-per-million for which reason they are often found in aquatic habitats.
These bacteria will attach to surfaces with their prosthecae, allowing a greater surface area with which to take up nutrients (and release waste products).
[1][2] Some prosthecates will grow in nutrient-poor soils as aerobic heterotrophs.
Oligotrophic Poindexter, Jeanne S. Dimorphic Prosthecate Bacteria: The Genera Caulobacter, Asticcacaulis, Hyphomicrobium, Pedomicrobium, Hyphomonas and Thiodendron.