How many species?

<p>Observed and estimated species and generic richness of amphipods and polychaetes at each of the sites sampled off southern Namibia and off Namaqualand during 2003. Regional data also shown. Estimated richness determined using Curve Fit estimator and Morgan-Mecer-Flodin model (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0143637#sec002" target="_blank">methods</a>).</p><p>How many species?</p>