*Corresponding Author
Abstract word count: 213
Main text word count: 2891
Number of references: 60
Keywords : Bivalvia, dataset bias, diversity gradient,
intertidal diversity, mollusca
Author Contributions : MRK, MAK and JA conceived the study and
planned the fieldwork; MRK carried out fieldwork, curated the data, ran
analyses and wrote the initial draft. MRK and NC processed and
identified field material. All authors contributed to the final
manuscript.
Data Accessibility : Upon acceptance of the manuscript, data
used will be stored in an appropriate data repository such as Dryad. Any
associated data DOI will be included in the article. Supporting data has
been attached to this submission for review purposes.