OpenAlex records 218 works for J. G. M. Thewissen with 6,827 citations and an h-index of 46 (orcid 0000-0002-0973-4137). Citation throughput peaked between 2001 and 2011 (β2,800 citations in that decade alone), consistent with a mature, high-impact career that remains productive (2 works in 2026) .
His most influential work resolves the terrestrial-to-aquatic transition of whales: the 1994 Science paper on archaeocete locomotion (174 citations) , the 2001 Nature paper on terrestrial cetacean skeletons and the whaleβartiodactyl relationship (291 citations) , and the 2007 Nature paper placing whale origins in Eocene India (339 citations) . He bridges paleontology with developmental biology: the 2006 PNAS paper on dolphin hind-limb bud degeneration (168 citations) and vestibular morphology work with Spoor (240 citations) . His 2008 edited synthesis of sensory evolution in secondarily aquatic vertebrates (237 citations) demonstrates breadth beyond Cetacea .
Strengths: fieldwork-driven discovery (Pakistan, India), repeated publication in top-tier venues, and integration of evo-devo with fossil evidence. Weaknesses/blindspots: most landmark papers are closed-access; citation counts concentrated in a few classic papers; the 2019β2026 citation dip partly reflects recency and OpenAlex lag, not declining influence. Total h-index (46) is inferred from OpenAlex metadata, which can split author identities (three minor duplicate records exist here), so metrics are approximate.
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